import { AuditAction, AuditResourceType, recordAudit } from '@sim/audit'
import { db, workflow as workflowTable } from '@sim/db'
import { createLogger } from '@sim/logger'
import { assertFolderMutable, assertWorkflowMutable } from '@sim/platform-authz/workflow'
import { toError } from '@sim/utils/errors'
import { generateId } from '@sim/utils/id'
import { mergeSubblockStateWithValues } from '@sim/workflow-persistence/subblocks'
import { eq } from 'drizzle-orm'
import { performCreateWorkspaceApiKey } from '@/lib/api-key/orchestration'
import type { ExecutionContext, ToolCallResult } from '@/lib/copilot/request/types'
import {
  buildVfsFolderPathMap,
  decodeVfsPathSegments,
  encodeVfsPathSegments,
} from '@/lib/copilot/vfs/path-utils'
import { env } from '@/lib/core/config/env'
import { generateRequestId } from '@/lib/core/utils/request'
import { getSocketServerUrl } from '@/lib/core/utils/urls'
import { executeWorkflow } from '@/lib/workflows/executor/execute-workflow'
import {
  getExecutionInputForWorkflow,
  getExecutionStateForWorkflow,
  getLatestExecutionStateWithExecutionId,
} from '@/lib/workflows/executor/execution-state'
import {
  performCreateFolder,
  performCreateWorkflow,
  performDeleteFolder,
  performDeleteWorkflow,
  performUpdateFolder,
  performUpdateWorkflow,
} from '@/lib/workflows/orchestration'
import {
  loadDeployedWorkflowState,
  loadWorkflowFromNormalizedTables,
  saveWorkflowToNormalizedTables,
} from '@/lib/workflows/persistence/utils'
import { sanitizeForCopilot } from '@/lib/workflows/sanitization/json-sanitizer'
import {
  resolveTriggerRunOptions,
  validateTriggerInput,
} from '@/lib/workflows/triggers/run-options'
import { listFolders, setWorkflowVariables, verifyFolderWorkspace } from '@/lib/workflows/utils'
import type { SerializableExecutionState } from '@/executor/execution/types'
import { hasExecutionResult } from '@/executor/utils/errors'
import type { BlockState, WorkflowState } from '@/stores/workflows/workflow/types'
import { ensureWorkflowAccess, ensureWorkspaceAccess, getDefaultWorkspaceId } from '../access'

function stripBinaryFields(value: unknown): unknown {
  if (value === null || value === undefined) return value
  if (typeof value !== 'object') return value
  if (Array.isArray(value)) return value.map(stripBinaryFields)
  const out: Record<string, unknown> = {}
  for (const [k, v] of Object.entries(value as Record<string, unknown>)) {
    if (k === 'base64') continue
    out[k] = stripBinaryFields(v)
  }
  return out
}

function buildExecutionOutput(
  result: {
    success: boolean
    metadata?: { executionId?: string }
    output?: unknown
    logs?: unknown[]
    error?: string
  },
  extra?: Record<string, unknown>
): ToolCallResult {
  return {
    success: result.success,
    output: {
      executionId: result.metadata?.executionId,
      success: result.success,
      ...extra,
      output: stripBinaryFields(result.output),
      logs: stripBinaryFields(result.logs),
    },
    error: result.success ? undefined : result.error || 'Workflow execution failed',
  }
}

function buildExecutionError(error: unknown): ToolCallResult {
  const message = toError(error).message
  if (hasExecutionResult(error)) {
    return buildExecutionOutput({
      ...error.executionResult,
      success: false,
      error: error.executionResult.error || message,
    })
  }
  return { success: false, error: message }
}

async function resolveRunFromBlockSnapshot(
  workflowId: string,
  executionId?: string
): Promise<
  | {
      executionId: string
      snapshot: SerializableExecutionState
    }
  | undefined
> {
  const sourceExecution = executionId
    ? {
        executionId,
        state: await getExecutionStateForWorkflow(executionId, workflowId),
      }
    : await getLatestExecutionStateWithExecutionId(workflowId)

  if (!sourceExecution?.state) {
    return undefined
  }

  return {
    executionId: sourceExecution.executionId,
    snapshot: sourceExecution.state,
  }
}

function resolveRunWorkflowInput(params: { workflow_input?: unknown; input?: unknown }): unknown {
  if (Object.hasOwn(params, 'workflow_input')) {
    return params.workflow_input
  }
  if (Object.hasOwn(params, 'input')) {
    return params.input
  }
  return undefined
}

function resolveRunTriggerBlockId(params: { triggerBlockId?: unknown }): string | undefined {
  return typeof params.triggerBlockId === 'string' && params.triggerBlockId.trim().length > 0
    ? params.triggerBlockId
    : undefined
}

interface PreparedTriggerRun {
  triggerBlockId: string
  input: unknown
}

/**
 * Resolves which trigger a copilot run targets and validates the input against
 * it. There are no fallbacks: an invalid trigger id, an ambiguous workflow, or
 * input that doesn't match the trigger's schema returns an error string so the
 * agent fixes it and retries. The resolved triggerBlockId is returned so the
 * caller pins the executed entry to the validated one.
 */
async function resolveValidatedTriggerRun(
  workflowId: string,
  useDraftState: boolean,
  params: {
    triggerBlockId?: unknown
    workflow_input?: unknown
    input?: unknown
    useMockPayload?: unknown
    inputFromExecutionId?: unknown
  }
): Promise<PreparedTriggerRun | { error: string }> {
  const state = useDraftState
    ? await loadWorkflowFromNormalizedTables(workflowId)
    : await loadDeployedWorkflowState(workflowId)

  if (!state?.blocks) {
    return {
      error: `Workflow ${workflowId} has no ${useDraftState ? 'saved draft' : 'deployed'} state to run.`,
    }
  }

  const merged = mergeSubblockStateWithValues(state.blocks)
  const options = resolveTriggerRunOptions(merged, state.edges)

  if (options.length === 0) {
    return {
      error:
        'No runnable trigger found. Add a Start/API/Input/Chat trigger or an external (webhook/integration) trigger before running.',
    }
  }

  const listTriggers = () =>
    options.map((option) => `${option.triggerBlockId} (${option.blockName})`).join(', ')

  const requestedId = resolveRunTriggerBlockId(params)
  let option = options[0]
  if (requestedId) {
    const match = options.find((o) => o.triggerBlockId === requestedId)
    if (!match) {
      return {
        error: `triggerBlockId "${requestedId}" is not a runnable trigger in this workflow. Valid triggers: ${listTriggers()}. Call get_workflow_run_options to inspect them.`,
      }
    }
    option = match
  } else if (options.length > 1) {
    return {
      error: `This workflow has multiple triggers — pass triggerBlockId to choose one: ${listTriggers()}. Call get_workflow_run_options for each trigger's input shape.`,
    }
  }

  const providedInput = resolveRunWorkflowInput(params)
  const hasProvidedInput = providedInput !== undefined
  const useMock = params.useMockPayload === true
  const fromExecutionId =
    typeof params.inputFromExecutionId === 'string' && params.inputFromExecutionId.trim().length > 0
      ? params.inputFromExecutionId.trim()
      : undefined

  const sourceCount = (hasProvidedInput ? 1 : 0) + (useMock ? 1 : 0) + (fromExecutionId ? 1 : 0)
  if (sourceCount > 1) {
    return {
      error:
        'Provide only one input source: workflow_input, useMockPayload: true, or inputFromExecutionId.',
    }
  }

  // Mock payload is generated to match the trigger, so it bypasses validation.
  if (useMock) {
    return { triggerBlockId: option.triggerBlockId, input: option.mockPayload }
  }

  let inputToValidate = providedInput
  if (fromExecutionId) {
    const past = await getExecutionInputForWorkflow(fromExecutionId, workflowId)
    if (!past.found) {
      return {
        error: `No execution "${fromExecutionId}" found for this workflow to reuse input from.`,
      }
    }
    if (past.input === undefined) {
      return { error: `Execution "${fromExecutionId}" has no recorded input to reuse.` }
    }
    inputToValidate = past.input
  }

  const validation = validateTriggerInput(option, inputToValidate)
  if (!validation.ok) {
    return { error: validation.error || 'workflow_input is invalid for the target trigger.' }
  }

  return { triggerBlockId: option.triggerBlockId, input: inputToValidate }
}

function isBlockProtected(blockId: string, blocksById: Record<string, BlockState>): boolean {
  const block = blocksById[blockId]
  if (!block) return false
  if (block.locked) return true

  const visited = new Set<string>()
  let parentId = block.data?.parentId
  while (parentId && !visited.has(parentId)) {
    visited.add(parentId)
    if (blocksById[parentId]?.locked) return true
    parentId = blocksById[parentId]?.data?.parentId
  }

  return false
}

function hasDisabledAncestor(blockId: string, blocksById: Record<string, BlockState>): boolean {
  const visited = new Set<string>()
  let parentId = blocksById[blockId]?.data?.parentId

  while (parentId && !visited.has(parentId)) {
    visited.add(parentId)
    const parent = blocksById[parentId]
    if (!parent) return false
    if (parent.enabled === false) return true
    parentId = parent.data?.parentId
  }

  return false
}

function findDescendants(containerId: string, blocksById: Record<string, BlockState>): string[] {
  const descendants: string[] = []
  const stack = [containerId]
  const visited = new Set<string>()

  while (stack.length > 0) {
    const current = stack.pop()!
    if (visited.has(current)) continue
    visited.add(current)

    for (const [blockId, block] of Object.entries(blocksById)) {
      if (block.data?.parentId === current) {
        descendants.push(blockId)
        stack.push(blockId)
      }
    }
  }

  return descendants
}

function notifyWorkflowUpdated(workflowId: string): void {
  fetch(`${getSocketServerUrl()}/api/workflow-updated`, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'x-api-key': env.INTERNAL_API_SECRET,
    },
    body: JSON.stringify({ workflowId }),
  }).catch((error) => {
    logger.warn('Failed to notify socket server of workflow update', { workflowId, error })
  })
}

import type {
  CreateFolderParams,
  CreateWorkflowParams,
  DeleteFolderParams,
  DeleteWorkflowParams,
  GenerateApiKeyParams,
  ManageFolderParams,
  MoveFolderParams,
  MoveWorkflowParams,
  RenameFolderParams,
  RenameWorkflowParams,
  RunBlockParams,
  RunFromBlockParams,
  RunWorkflowParams,
  RunWorkflowUntilBlockParams,
  SetBlockEnabledParams,
  SetGlobalWorkflowVariablesParams,
  UpdateWorkflowParams,
  VariableOperation,
} from '../param-types'

const logger = createLogger('WorkflowMutations')

function assertWorkflowMutationNotAborted(
  context: ExecutionContext,
  message = 'Request aborted before workflow mutation could be applied.'
): void {
  if (context.abortSignal?.aborted) {
    throw new Error(message)
  }
}

export async function executeCreateWorkflow(
  params: CreateWorkflowParams,
  context: ExecutionContext
): Promise<ToolCallResult> {
  try {
    const name = typeof params?.name === 'string' ? params.name.trim() : ''
    if (!name) {
      return { success: false, error: 'name is required' }
    }
    if (name.length > 200) {
      return { success: false, error: 'Workflow name must be 200 characters or less' }
    }
    const description = typeof params?.description === 'string' ? params.description : null
    if (description && description.length > 2000) {
      return { success: false, error: 'Description must be 2000 characters or less' }
    }

    const workspaceId =
      params?.workspaceId || context.workspaceId || (await getDefaultWorkspaceId(context.userId))
    const folderId = params?.folderId || null

    await ensureWorkspaceAccess(workspaceId, context.userId, 'write')
    await assertFolderMutable(folderId)
    assertWorkflowMutationNotAborted(context)

    const result = await performCreateWorkflow({
      userId: context.userId,
      workspaceId,
      name,
      description,
      folderId,
    })
    if (!result.success || !result.workflow) {
      return { success: false, error: result.error || 'Failed to create workflow' }
    }

    try {
      const { PlatformEvents } = await import('@/lib/core/telemetry')
      PlatformEvents.workflowCreated({
        workflowId: result.workflow.id,
        name: result.workflow.name,
        workspaceId,
        folderId: folderId ?? undefined,
      })
    } catch (_e) {
      // Telemetry is best-effort
    }

    const normalized = await loadWorkflowFromNormalizedTables(result.workflow.id)
    let copilotSanitizedWorkflowState: unknown
    if (normalized) {
      copilotSanitizedWorkflowState = sanitizeForCopilot({
        blocks: normalized.blocks || {},
        edges: normalized.edges || [],
        loops: normalized.loops || {},
        parallels: normalized.parallels || {},
      } as WorkflowState)
    }

    return {
      success: true,
      output: {
        workflowId: result.workflow.id,
        workflowName: result.workflow.name,
        workspaceId: result.workflow.workspaceId,
        folderId: result.workflow.folderId,
        ...(copilotSanitizedWorkflowState ? { copilotSanitizedWorkflowState } : {}),
      },
    }
  } catch (error) {
    return { success: false, error: toError(error).message }
  }
}

export async function executeCreateFolder(
  params: CreateFolderParams,
  context: ExecutionContext
): Promise<ToolCallResult> {
  try {
    const name = typeof params?.name === 'string' ? params.name.trim() : ''
    if (!name) {
      return { success: false, error: 'name is required' }
    }
    if (name.length > 200) {
      return { success: false, error: 'Folder name must be 200 characters or less' }
    }

    const workspaceId =
      params?.workspaceId || context.workspaceId || (await getDefaultWorkspaceId(context.userId))
    const parentId = params?.parentId || null

    await ensureWorkspaceAccess(workspaceId, context.userId, 'write')
    await assertFolderMutable(parentId)
    assertWorkflowMutationNotAborted(context)

    const result = await performCreateFolder({
      userId: context.userId,
      workspaceId,
      name,
      parentId,
    })
    if (!result.success || !result.folder) {
      return { success: false, error: result.error || 'Failed to create folder' }
    }

    return {
      success: true,
      output: {
        folderId: result.folder.id,
        name: result.folder.name,
        workspaceId: result.folder.workspaceId,
        parentId: result.folder.parentId,
      },
    }
  } catch (error) {
    return { success: false, error: toError(error).message }
  }
}

export async function executeRunWorkflow(
  params: RunWorkflowParams,
  context: ExecutionContext
): Promise<ToolCallResult> {
  try {
    const workflowId = params.workflowId || context.workflowId
    if (!workflowId) {
      return { success: false, error: 'workflowId is required' }
    }

    const { workflow: workflowRecord } = await ensureWorkflowAccess(
      workflowId,
      context.userId,
      'write'
    )

    const useDraftState = !params.useDeployedState

    const prepared = await resolveValidatedTriggerRun(workflowId, useDraftState, params)
    if ('error' in prepared) {
      return { success: false, error: prepared.error }
    }

    const result = await executeWorkflow(
      {
        id: workflowRecord.id,
        userId: workflowRecord.userId,
        workspaceId: workflowRecord.workspaceId,
        variables: workflowRecord.variables || {},
      },
      generateRequestId(),
      prepared.input,
      context.userId,
      {
        enabled: true,
        useDraftState,
        workflowTriggerType: 'copilot',
        triggerBlockId: prepared.triggerBlockId,
      }
    )

    return buildExecutionOutput(result)
  } catch (error) {
    return buildExecutionError(error)
  }
}

export async function executeSetGlobalWorkflowVariables(
  params: SetGlobalWorkflowVariablesParams,
  context: ExecutionContext
): Promise<ToolCallResult> {
  try {
    const workflowId = params.workflowId || context.workflowId
    if (!workflowId) {
      return { success: false, error: 'workflowId is required' }
    }
    const operations: VariableOperation[] = Array.isArray(params.operations)
      ? params.operations
      : []
    const { workflow: workflowRecord } = await ensureWorkflowAccess(
      workflowId,
      context.userId,
      'write'
    )
    await assertWorkflowMutable(workflowId)

    interface WorkflowVariable {
      id: string
      workflowId?: string
      name: string
      type: string
      value?: unknown
    }
    const currentVarsRecord = (workflowRecord.variables as Record<string, unknown>) || {}
    const byName: Record<string, WorkflowVariable> = {}
    Object.values(currentVarsRecord).forEach((v) => {
      if (v && typeof v === 'object' && 'id' in v && 'name' in v) {
        const variable = v as WorkflowVariable
        byName[String(variable.name)] = variable
      }
    })

    for (const op of operations) {
      const key = String(op?.name || '')
      if (!key) continue
      const nextType = op?.type || byName[key]?.type || 'plain'
      const coerceValue = (value: unknown, type: string): unknown => {
        if (value === undefined) return value
        if (type === 'number') {
          const n = Number(value)
          return Number.isNaN(n) ? value : n
        }
        if (type === 'boolean') {
          const v = String(value).trim().toLowerCase()
          if (v === 'true') return true
          if (v === 'false') return false
          return value
        }
        if (type === 'array' || type === 'object') {
          try {
            const parsed = JSON.parse(String(value))
            if (type === 'array' && Array.isArray(parsed)) return parsed
            if (type === 'object' && parsed && typeof parsed === 'object' && !Array.isArray(parsed))
              return parsed
          } catch (error) {
            logger.warn('Failed to parse JSON value for variable coercion', {
              error: toError(error).message,
            })
          }
          return value
        }
        return value
      }

      if (op.operation === 'delete') {
        delete byName[key]
        continue
      }
      const typedValue = coerceValue(op.value, nextType)
      if (op.operation === 'add') {
        byName[key] = {
          id: generateId(),
          workflowId,
          name: key,
          type: nextType,
          value: typedValue,
        }
        continue
      }
      if (op.operation === 'edit') {
        if (!byName[key]) {
          byName[key] = {
            id: generateId(),
            workflowId,
            name: key,
            type: nextType,
            value: typedValue,
          }
        } else {
          byName[key] = {
            ...byName[key],
            type: nextType,
            value: typedValue,
          }
        }
      }
    }

    const nextVarsRecord = Object.fromEntries(Object.values(byName).map((v) => [String(v.id), v]))

    assertWorkflowMutationNotAborted(context)
    await setWorkflowVariables(workflowId, nextVarsRecord)
    notifyWorkflowUpdated(workflowId)

    recordAudit({
      actorId: context.userId,
      action: AuditAction.WORKFLOW_VARIABLES_UPDATED,
      resourceType: AuditResourceType.WORKFLOW,
      resourceId: workflowId,
      description: `Updated workflow variables`,
      metadata: { operationCount: operations.length, source: 'copilot' },
    })

    return { success: true, output: { updated: Object.values(byName).length } }
  } catch (error) {
    return { success: false, error: toError(error).message }
  }
}

export async function executeRenameWorkflow(
  params: RenameWorkflowParams,
  context: ExecutionContext
): Promise<ToolCallResult> {
  try {
    const workflowId = params.workflowId
    if (!workflowId) {
      return { success: false, error: 'workflowId is required' }
    }
    const name = typeof params.name === 'string' ? params.name.trim() : ''
    if (!name) {
      return { success: false, error: 'name is required' }
    }
    if (name.length > 200) {
      return { success: false, error: 'Workflow name must be 200 characters or less' }
    }

    const current = await ensureWorkflowAccess(workflowId, context.userId, 'write')
    await assertWorkflowMutable(workflowId)
    assertWorkflowMutationNotAborted(context)
    if (!current.workspaceId) {
      return { success: false, error: 'Workflow workspace is required' }
    }
    const result = await performUpdateWorkflow({
      workflowId,
      userId: context.userId,
      workspaceId: current.workspaceId,
      currentName: current.workflow.name,
      currentFolderId: current.workflow.folderId,
      name,
    })
    if (!result.success) {
      return { success: false, error: result.error || 'Failed to rename workflow' }
    }

    return { success: true, output: { workflowId, name } }
  } catch (error) {
    return { success: false, error: toError(error).message }
  }
}

export async function executeMoveWorkflow(
  params: MoveWorkflowParams,
  context: ExecutionContext
): Promise<ToolCallResult> {
  try {
    const workflowIds = params.workflowIds
    if (!workflowIds || workflowIds.length === 0) {
      return { success: false, error: 'workflowIds is required' }
    }

    const folderId = params.folderId || null
    const moved: string[] = []
    const failed: string[] = []

    await assertFolderMutable(folderId)

    for (const workflowId of workflowIds) {
      try {
        const { workspaceId, workflow } = await ensureWorkflowAccess(
          workflowId,
          context.userId,
          'write'
        )
        if (!workspaceId) {
          failed.push(workflowId)
          continue
        }
        if (folderId) {
          if (!workspaceId || !(await verifyFolderWorkspace(folderId, workspaceId))) {
            failed.push(workflowId)
            continue
          }
        }
        await assertWorkflowMutable(workflowId)
        assertWorkflowMutationNotAborted(context)
        const result = await performUpdateWorkflow({
          workflowId,
          userId: context.userId,
          workspaceId,
          currentName: workflow.name,
          currentFolderId: workflow.folderId,
          folderId,
        })
        if (!result.success) {
          failed.push(workflowId)
          continue
        }
        moved.push(workflowId)
      } catch {
        failed.push(workflowId)
      }
    }

    return { success: moved.length > 0, output: { moved, failed, folderId } }
  } catch (error) {
    return { success: false, error: toError(error).message }
  }
}

export async function executeMoveFolder(
  params: MoveFolderParams,
  context: ExecutionContext
): Promise<ToolCallResult> {
  try {
    const folderId = params.folderId
    if (!folderId) {
      return { success: false, error: 'folderId is required' }
    }

    const parentId = params.parentId || null

    const workspaceId = context.workspaceId || (await getDefaultWorkspaceId(context.userId))
    await ensureWorkspaceAccess(workspaceId, context.userId, 'write')

    if (!(await verifyFolderWorkspace(folderId, workspaceId))) {
      return { success: false, error: 'Folder not found' }
    }
    if (parentId && !(await verifyFolderWorkspace(parentId, workspaceId))) {
      return { success: false, error: 'Parent folder not found' }
    }

    await assertFolderMutable(folderId)
    await assertFolderMutable(parentId)
    assertWorkflowMutationNotAborted(context)
    const result = await performUpdateFolder({
      folderId,
      workspaceId,
      userId: context.userId,
      parentId,
    })
    if (!result.success) {
      return { success: false, error: result.error || 'Failed to move folder' }
    }

    return { success: true, output: { folderId, parentId } }
  } catch (error) {
    return { success: false, error: toError(error).message }
  }
}

export async function executeRunWorkflowUntilBlock(
  params: RunWorkflowUntilBlockParams,
  context: ExecutionContext
): Promise<ToolCallResult> {
  try {
    const workflowId = params.workflowId || context.workflowId
    if (!workflowId) {
      return { success: false, error: 'workflowId is required' }
    }
    if (!params.stopAfterBlockId) {
      return { success: false, error: 'stopAfterBlockId is required' }
    }

    const { workflow: workflowRecord } = await ensureWorkflowAccess(
      workflowId,
      context.userId,
      'write'
    )

    const useDraftState = !params.useDeployedState

    const prepared = await resolveValidatedTriggerRun(workflowId, useDraftState, params)
    if ('error' in prepared) {
      return { success: false, error: prepared.error }
    }

    const result = await executeWorkflow(
      {
        id: workflowRecord.id,
        userId: workflowRecord.userId,
        workspaceId: workflowRecord.workspaceId,
        variables: workflowRecord.variables || {},
      },
      generateRequestId(),
      prepared.input,
      context.userId,
      {
        enabled: true,
        useDraftState,
        stopAfterBlockId: params.stopAfterBlockId,
        workflowTriggerType: 'copilot',
        triggerBlockId: prepared.triggerBlockId,
      }
    )

    return buildExecutionOutput(result, { stoppedAfterBlockId: params.stopAfterBlockId })
  } catch (error) {
    return buildExecutionError(error)
  }
}

export async function executeGenerateApiKey(
  params: GenerateApiKeyParams,
  context: ExecutionContext
): Promise<ToolCallResult> {
  try {
    const name = typeof params.name === 'string' ? params.name.trim() : ''
    if (!name) {
      return { success: false, error: 'name is required' }
    }
    if (name.length > 200) {
      return { success: false, error: 'API key name must be 200 characters or less' }
    }

    const workspaceId =
      params.workspaceId || context.workspaceId || (await getDefaultWorkspaceId(context.userId))
    await ensureWorkspaceAccess(workspaceId, context.userId, 'admin')
    assertWorkflowMutationNotAborted(context)

    const result = await performCreateWorkspaceApiKey({
      workspaceId,
      userId: context.userId,
      name,
      source: 'copilot',
    })
    if (!result.success || !result.key) {
      return { success: false, error: result.error || 'Failed to generate API key' }
    }

    return {
      success: true,
      output: {
        id: result.key.id,
        name: result.key.name,
        key: result.key.key,
        workspaceId,
        message:
          'API key created successfully. Copy this key now — it will not be shown again. Use this key in the x-api-key header when calling workflow API endpoints.',
      },
    }
  } catch (error) {
    return { success: false, error: toError(error).message }
  }
}

export async function executeRunFromBlock(
  params: RunFromBlockParams,
  context: ExecutionContext
): Promise<ToolCallResult> {
  try {
    const workflowId = params.workflowId || context.workflowId
    if (!workflowId) {
      return { success: false, error: 'workflowId is required' }
    }
    if (!params.startBlockId) {
      return { success: false, error: 'startBlockId is required' }
    }

    const sourceSnapshot = await resolveRunFromBlockSnapshot(workflowId, params.executionId)

    if (!sourceSnapshot) {
      return {
        success: false,
        error: params.executionId
          ? `No execution state found for execution ${params.executionId}. Run the full workflow first.`
          : `No execution state found for workflow ${workflowId}. Run the full workflow first to create a snapshot.`,
      }
    }

    const { workflow: workflowRecord } = await ensureWorkflowAccess(
      workflowId,
      context.userId,
      'write'
    )
    const useDraftState = !params.useDeployedState

    const result = await executeWorkflow(
      {
        id: workflowRecord.id,
        userId: workflowRecord.userId,
        workspaceId: workflowRecord.workspaceId,
        variables: workflowRecord.variables || {},
      },
      generateRequestId(),
      resolveRunWorkflowInput(params),
      context.userId,
      {
        enabled: true,
        useDraftState,
        workflowTriggerType: 'copilot',
        runFromBlock: {
          startBlockId: params.startBlockId,
          sourceSnapshot: sourceSnapshot.snapshot,
          sourceExecutionId: sourceSnapshot.executionId,
        },
      }
    )

    return buildExecutionOutput(result, { startBlockId: params.startBlockId })
  } catch (error) {
    return buildExecutionError(error)
  }
}

async function executeUpdateWorkflow(
  params: UpdateWorkflowParams,
  context: ExecutionContext
): Promise<ToolCallResult> {
  try {
    const workflowId = params.workflowId
    if (!workflowId) {
      return { success: false, error: 'workflowId is required' }
    }

    const updates: { name?: string; description?: string } = {}

    if (typeof params.name === 'string') {
      const name = params.name.trim()
      if (!name) return { success: false, error: 'name cannot be empty' }
      if (name.length > 200)
        return { success: false, error: 'Workflow name must be 200 characters or less' }
      updates.name = name
    }

    if (typeof params.description === 'string') {
      if (params.description.length > 2000) {
        return { success: false, error: 'Description must be 2000 characters or less' }
      }
      updates.description = params.description
    }

    if (Object.keys(updates).length === 0) {
      return { success: false, error: 'At least one of name or description is required' }
    }

    const current = await ensureWorkflowAccess(workflowId, context.userId, 'write')
    if (!current.workspaceId) {
      return { success: false, error: 'Workflow workspace is required' }
    }
    await assertWorkflowMutable(workflowId)
    assertWorkflowMutationNotAborted(context)
    const result = await performUpdateWorkflow({
      workflowId,
      userId: context.userId,
      workspaceId: current.workspaceId,
      currentName: current.workflow.name,
      currentFolderId: current.workflow.folderId,
      ...updates,
    })
    if (!result.success) {
      return { success: false, error: result.error || 'Failed to update workflow' }
    }

    return {
      success: true,
      output: { workflowId, ...updates },
    }
  } catch (error) {
    return { success: false, error: toError(error).message }
  }
}

export async function executeSetBlockEnabled(
  params: SetBlockEnabledParams,
  context: ExecutionContext
): Promise<ToolCallResult> {
  try {
    const workflowId = params.workflowId || context.workflowId
    if (!workflowId) {
      return { success: false, error: 'workflowId is required' }
    }
    if (!params.blockId) {
      return { success: false, error: 'blockId is required' }
    }
    if (typeof params.enabled !== 'boolean') {
      return { success: false, error: 'enabled must be a boolean' }
    }

    const { workflow: workflowRecord } = await ensureWorkflowAccess(
      workflowId,
      context.userId,
      'write'
    )
    await assertWorkflowMutable(workflowId)
    assertWorkflowMutationNotAborted(context)

    const normalized = await loadWorkflowFromNormalizedTables(workflowId)
    if (!normalized) {
      return { success: false, error: `Workflow ${workflowId} has no normalized state` }
    }

    const currentState: WorkflowState = {
      blocks: normalized.blocks as Record<string, BlockState>,
      edges: normalized.edges || [],
      loops: normalized.loops || {},
      parallels: normalized.parallels || {},
      lastSaved: Date.now(),
    }

    const currentBlocks = currentState.blocks
    const targetBlock = currentBlocks[params.blockId]
    if (!targetBlock) {
      return {
        success: false,
        error: `Block ${params.blockId} not found in workflow ${workflowId}`,
      }
    }
    if (isBlockProtected(params.blockId, currentBlocks)) {
      return {
        success: false,
        error: `Block ${params.blockId} is locked or inside a locked container and cannot be updated`,
      }
    }
    if (targetBlock.enabled === params.enabled) {
      return {
        success: true,
        output: {
          workflowId,
          workflowName: workflowRecord.name,
          blockId: params.blockId,
          enabled: params.enabled,
          affectedBlockIds: [params.blockId],
          workflowState: currentState,
          copilotSanitizedWorkflowState: sanitizeForCopilot(currentState),
          message: `Block ${params.blockId} is already ${params.enabled ? 'enabled' : 'disabled'}`,
        },
      }
    }
    if (params.enabled && hasDisabledAncestor(params.blockId, currentBlocks)) {
      return {
        success: false,
        error: `Cannot enable block ${params.blockId} while one of its parent containers is disabled. Enable the parent first.`,
      }
    }

    const affectedBlockIds = new Set<string>([params.blockId])
    if (targetBlock.type === 'loop' || targetBlock.type === 'parallel') {
      for (const descendantId of findDescendants(params.blockId, currentBlocks)) {
        if (!isBlockProtected(descendantId, currentBlocks)) {
          affectedBlockIds.add(descendantId)
        }
      }
    }

    const nextBlocks: Record<string, BlockState> = { ...currentBlocks }
    for (const blockId of affectedBlockIds) {
      nextBlocks[blockId] = {
        ...nextBlocks[blockId],
        enabled: params.enabled,
      }
    }

    const nextState: WorkflowState = {
      ...currentState,
      blocks: nextBlocks,
      lastSaved: Date.now(),
    }

    assertWorkflowMutationNotAborted(context)
    const saveResult = await saveWorkflowToNormalizedTables(workflowId, nextState)
    if (!saveResult.success) {
      return {
        success: false,
        error: saveResult.error || `Failed to persist enabled state for block ${params.blockId}`,
      }
    }

    await db
      .update(workflowTable)
      .set({
        lastSynced: new Date(),
        updatedAt: new Date(),
      })
      .where(eq(workflowTable.id, workflowId))

    notifyWorkflowUpdated(workflowId)

    return {
      success: true,
      output: {
        workflowId,
        workflowName: workflowRecord.name,
        blockId: params.blockId,
        enabled: params.enabled,
        affectedBlockIds: Array.from(affectedBlockIds),
        workflowState: nextState,
        copilotSanitizedWorkflowState: sanitizeForCopilot(nextState),
      },
    }
  } catch (error) {
    return { success: false, error: toError(error).message }
  }
}

export async function executeDeleteWorkflow(
  params: DeleteWorkflowParams,
  context: ExecutionContext
): Promise<ToolCallResult> {
  try {
    const workflowIds = params.workflowIds
    if (!workflowIds || workflowIds.length === 0) {
      return { success: false, error: 'workflowIds is required' }
    }

    const deleted: Array<{ workflowId: string; name: string }> = []
    const failed: string[] = []

    for (const workflowId of workflowIds) {
      try {
        const { workflow: workflowRecord } = await ensureWorkflowAccess(
          workflowId,
          context.userId,
          'write'
        )
        await assertWorkflowMutable(workflowId)
        assertWorkflowMutationNotAborted(context)

        const result = await performDeleteWorkflow({ workflowId, userId: context.userId })
        if (result.success) {
          deleted.push({ workflowId, name: workflowRecord.name })
        } else {
          failed.push(workflowId)
        }
      } catch {
        failed.push(workflowId)
      }
    }

    return {
      success: deleted.length > 0,
      output: { deleted, failed },
    }
  } catch (error) {
    return { success: false, error: toError(error).message }
  }
}

export async function executeDeleteFolder(
  params: DeleteFolderParams,
  context: ExecutionContext
): Promise<ToolCallResult> {
  try {
    const folderIds = params.folderIds
    if (!folderIds || folderIds.length === 0) {
      return { success: false, error: 'folderIds is required' }
    }

    const workspaceId = context.workspaceId || (await getDefaultWorkspaceId(context.userId))
    await ensureWorkspaceAccess(workspaceId, context.userId, 'write')

    const folders = await listFolders(workspaceId)
    const deleted: string[] = []
    const failed: string[] = []

    for (const folderId of folderIds) {
      const folder = folders.find((f) => f.folderId === folderId)
      if (!folder) {
        failed.push(folderId)
        continue
      }

      assertWorkflowMutationNotAborted(context)

      try {
        await assertFolderMutable(folderId)

        const result = await performDeleteFolder({
          folderId,
          workspaceId,
          userId: context.userId,
          folderName: folder.folderName,
        })

        if (result.success) {
          deleted.push(folderId)
        } else {
          failed.push(folderId)
        }
      } catch {
        failed.push(folderId)
      }
    }

    return { success: deleted.length > 0, output: { deleted, failed } }
  } catch (error) {
    return { success: false, error: toError(error).message }
  }
}

async function executeRenameFolder(
  params: RenameFolderParams,
  context: ExecutionContext
): Promise<ToolCallResult> {
  try {
    const folderId = params.folderId
    if (!folderId) {
      return { success: false, error: 'folderId is required' }
    }
    const name = typeof params.name === 'string' ? params.name.trim() : ''
    if (!name) {
      return { success: false, error: 'name is required' }
    }
    if (name.length > 200) {
      return { success: false, error: 'Folder name must be 200 characters or less' }
    }

    const workspaceId = context.workspaceId || (await getDefaultWorkspaceId(context.userId))
    await ensureWorkspaceAccess(workspaceId, context.userId, 'write')

    if (!(await verifyFolderWorkspace(folderId, workspaceId))) {
      return { success: false, error: 'Folder not found' }
    }

    await assertFolderMutable(folderId)
    assertWorkflowMutationNotAborted(context)
    const result = await performUpdateFolder({
      folderId,
      workspaceId,
      userId: context.userId,
      name,
    })
    if (!result.success) {
      return { success: false, error: result.error || 'Failed to rename folder' }
    }

    return { success: true, output: { folderId, name } }
  } catch (error) {
    return { success: false, error: toError(error).message }
  }
}

/**
 * Strip the `workflows/` VFS prefix from a folder path, returning the
 * folder-relative remainder. `workflows` (or an empty path) maps to the
 * workspace root and yields an empty string.
 */
function workflowFolderRelativePath(rawPath: string): string {
  const trimmed = rawPath.trim().replace(/^\/+|\/+$/g, '')
  if (!trimmed || trimmed === 'workflows') return ''
  return trimmed.startsWith('workflows/') ? trimmed.slice('workflows/'.length) : trimmed
}

/**
 * Load a lookup from each folder's canonical encoded VFS path to its id by
 * inverting the same {@link buildVfsFolderPathMap} the VFS uses to serve folder
 * paths, so a path the agent sees via glob round-trips to the right id. Fetched
 * once per manage_folder call and reused across target + parent resolution.
 */
async function loadFolderPathToIdMap(workspaceId: string): Promise<Map<string, string>> {
  const byPath = new Map<string, string>()
  for (const [folderId, encodedPath] of buildVfsFolderPathMap(
    await listFolders(workspaceId)
  ).entries()) {
    byPath.set(encodedPath, folderId)
  }
  return byPath
}

function lookupFolderIdByPath(rawPath: string, byPath: Map<string, string>): string | null {
  const relative = workflowFolderRelativePath(rawPath)
  if (!relative) return null
  return byPath.get(encodeVfsPathSegments(decodeVfsPathSegments(relative))) ?? null
}

/** Resolve the folder a manage_folder op targets, preferring folderId over path. */
async function resolveManageFolderTarget(
  params: ManageFolderParams,
  getFolderPaths: () => Promise<Map<string, string>>
): Promise<{ folderId: string } | { error: string }> {
  const directId = typeof params.folderId === 'string' ? params.folderId.trim() : ''
  if (directId) return { folderId: directId }
  const path = typeof params.path === 'string' ? params.path.trim() : ''
  if (!path) return { error: 'Provide the folder path (e.g. "workflows/Marketing") or folderId.' }
  const folderId = lookupFolderIdByPath(path, await getFolderPaths())
  if (!folderId) return { error: `Folder not found at ${path}` }
  return { folderId }
}

/**
 * Resolve the destination parent for move/create. parentId/destinationPath are
 * optional; their absence (or an explicit root) targets the workspace root
 * (parentId null).
 */
async function resolveManageFolderParent(
  params: ManageFolderParams,
  getFolderPaths: () => Promise<Map<string, string>>
): Promise<{ parentId: string | null } | { error: string }> {
  const directId = typeof params.parentId === 'string' ? params.parentId.trim() : ''
  if (directId) return { parentId: directId }
  if (params.parentId === null) return { parentId: null }
  const dest = typeof params.destinationPath === 'string' ? params.destinationPath.trim() : ''
  if (!dest || !workflowFolderRelativePath(dest)) return { parentId: null }
  const parentId = lookupFolderIdByPath(dest, await getFolderPaths())
  if (!parentId) return { error: `Destination folder not found at ${dest}` }
  return { parentId }
}

/**
 * Single entry point for folder CRUD (create/rename/move/delete). Resolves the
 * VFS-path/folderId handles, then delegates to the existing folder handlers so
 * all DB orchestration (performCreateFolder / performUpdateFolder /
 * performDeleteFolder) stays in one place.
 */
export async function executeManageFolder(
  params: ManageFolderParams,
  context: ExecutionContext
): Promise<ToolCallResult> {
  try {
    const operation = typeof params?.operation === 'string' ? params.operation.trim() : ''
    const workspaceId = context.workspaceId || (await getDefaultWorkspaceId(context.userId))

    // Fetch the workspace folder list at most once, lazily — only when a path
    // (vs an explicit id) actually needs resolving, and shared across the
    // target + parent lookups a single move/create performs.
    let folderPathsPromise: Promise<Map<string, string>> | undefined
    const getFolderPaths = () => (folderPathsPromise ??= loadFolderPathToIdMap(workspaceId))

    switch (operation) {
      case 'create': {
        let name = typeof params.name === 'string' ? params.name.trim() : ''
        let parentId: string | null = null
        const path = typeof params.path === 'string' ? params.path.trim() : ''
        if (!name && path) {
          const segments = decodeVfsPathSegments(workflowFolderRelativePath(path))
          if (segments.length === 0) {
            return { success: false, error: 'create requires a folder name or path' }
          }
          name = segments[segments.length - 1]
          const parentSegments = segments.slice(0, -1)
          if (parentSegments.length > 0) {
            const resolved = lookupFolderIdByPath(
              encodeVfsPathSegments(parentSegments),
              await getFolderPaths()
            )
            if (!resolved) {
              return { success: false, error: `Parent folder not found for ${path}` }
            }
            parentId = resolved
          }
        } else {
          const parent = await resolveManageFolderParent(params, getFolderPaths)
          if ('error' in parent) return { success: false, error: parent.error }
          parentId = parent.parentId
        }
        if (!name) return { success: false, error: 'create requires a folder name or path' }
        return executeCreateFolder({ name, parentId: parentId ?? undefined, workspaceId }, context)
      }
      case 'rename': {
        const name = typeof params.name === 'string' ? params.name.trim() : ''
        if (!name) return { success: false, error: 'rename requires a new name' }
        const target = await resolveManageFolderTarget(params, getFolderPaths)
        if ('error' in target) return { success: false, error: target.error }
        return executeRenameFolder({ folderId: target.folderId, name }, context)
      }
      case 'move': {
        const target = await resolveManageFolderTarget(params, getFolderPaths)
        if ('error' in target) return { success: false, error: target.error }
        const parent = await resolveManageFolderParent(params, getFolderPaths)
        if ('error' in parent) return { success: false, error: parent.error }
        return executeMoveFolder({ folderId: target.folderId, parentId: parent.parentId }, context)
      }
      case 'delete': {
        const target = await resolveManageFolderTarget(params, getFolderPaths)
        if ('error' in target) return { success: false, error: target.error }
        return executeDeleteFolder({ folderIds: [target.folderId] }, context)
      }
      default:
        return {
          success: false,
          error: `Unknown operation "${operation}". Use create, rename, move, or delete.`,
        }
    }
  } catch (error) {
    return { success: false, error: toError(error).message }
  }
}

export async function executeRunBlock(
  params: RunBlockParams,
  context: ExecutionContext
): Promise<ToolCallResult> {
  try {
    const workflowId = params.workflowId || context.workflowId
    if (!workflowId) {
      return { success: false, error: 'workflowId is required' }
    }
    if (!params.blockId) {
      return { success: false, error: 'blockId is required' }
    }

    const sourceSnapshot = await resolveRunFromBlockSnapshot(workflowId, params.executionId)

    if (!sourceSnapshot) {
      return {
        success: false,
        error: params.executionId
          ? `No execution state found for execution ${params.executionId}. Run the full workflow first.`
          : `No execution state found for workflow ${workflowId}. Run the full workflow first to create a snapshot.`,
      }
    }

    const { workflow: workflowRecord } = await ensureWorkflowAccess(
      workflowId,
      context.userId,
      'write'
    )
    const useDraftState = !params.useDeployedState

    const result = await executeWorkflow(
      {
        id: workflowRecord.id,
        userId: workflowRecord.userId,
        workspaceId: workflowRecord.workspaceId,
        variables: workflowRecord.variables || {},
      },
      generateRequestId(),
      resolveRunWorkflowInput(params),
      context.userId,
      {
        enabled: true,
        useDraftState,
        workflowTriggerType: 'copilot',
        runFromBlock: {
          startBlockId: params.blockId,
          sourceSnapshot: sourceSnapshot.snapshot,
          sourceExecutionId: sourceSnapshot.executionId,
        },
        stopAfterBlockId: params.blockId,
      }
    )

    return buildExecutionOutput(result, { blockId: params.blockId })
  } catch (error) {
    return buildExecutionError(error)
  }
}