/**
 * GET /api/v1/admin/workflows
 *
 * List all workflows across all workspaces with pagination.
 *
 * Query Parameters:
 *   - limit: number (default: 50, max: 250)
 *   - offset: number (default: 0)
 *
 * Response: AdminListResponse<AdminWorkflow>
 */

import { db } from '@sim/db'
import { workflow } from '@sim/db/schema'
import { createLogger } from '@sim/logger'
import { count } from 'drizzle-orm'
import { adminV1ListWorkflowsContract } from '@/lib/api/contracts/v1/admin'
import { parseRequest } from '@/lib/api/server'
import { withRouteHandler } from '@/lib/core/utils/with-route-handler'
import { withAdminAuth } from '@/app/api/v1/admin/middleware'
import { internalErrorResponse, listResponse } from '@/app/api/v1/admin/responses'
import { type AdminWorkflow, createPaginationMeta, toAdminWorkflow } from '@/app/api/v1/admin/types'

const logger = createLogger('AdminWorkflowsAPI')

export const GET = withRouteHandler(
  withAdminAuth(async (request) => {
    const parsed = await parseRequest(adminV1ListWorkflowsContract, request, {})
    if (!parsed.success) return parsed.response

    const { limit, offset } = parsed.data.query

    try {
      const [countResult, workflows] = await Promise.all([
        db.select({ total: count() }).from(workflow),
        db
          .select({
            id: workflow.id,
            name: workflow.name,
            description: workflow.description,
            workspaceId: workflow.workspaceId,
            folderId: workflow.folderId,
            isDeployed: workflow.isDeployed,
            deployedAt: workflow.deployedAt,
            runCount: workflow.runCount,
            lastRunAt: workflow.lastRunAt,
            createdAt: workflow.createdAt,
            updatedAt: workflow.updatedAt,
          })
          .from(workflow)
          .orderBy(workflow.name)
          .limit(limit)
          .offset(offset),
      ])

      const total = countResult[0].total
      const data: AdminWorkflow[] = workflows.map(toAdminWorkflow)
      const pagination = createPaginationMeta(total, limit, offset)

      logger.info(`Admin API: Listed ${data.length} workflows (total: ${total})`)

      return listResponse(data, pagination)
    } catch (error) {
      logger.error('Admin API: Failed to list workflows', { error })
      return internalErrorResponse('Failed to list workflows')
    }
  })
)