import type { GoogleTasksListParams, GoogleTasksListResponse } from '@/tools/google_tasks/types'
import { TASKS_API_BASE } from '@/tools/google_tasks/types'
import type { ToolConfig } from '@/tools/types'

export const listTool: ToolConfig<GoogleTasksListParams, GoogleTasksListResponse> = {
  id: 'google_tasks_list',
  name: 'Google Tasks List Tasks',
  description: 'List all tasks in a Google Tasks list',
  version: '1.0.0',

  oauth: {
    required: true,
    provider: 'google-tasks',
  },

  params: {
    accessToken: {
      type: 'string',
      required: true,
      visibility: 'hidden',
      description: 'Google Tasks OAuth access token',
    },
    taskListId: {
      type: 'string',
      required: false,
      visibility: 'user-or-llm',
      description: 'Task list ID (defaults to primary task list "@default")',
    },
    maxResults: {
      type: 'number',
      required: false,
      visibility: 'user-or-llm',
      description: 'Maximum number of tasks to return (default 20, max 100)',
    },
    pageToken: {
      type: 'string',
      required: false,
      visibility: 'user-or-llm',
      description: 'Token for pagination',
    },
    showCompleted: {
      type: 'boolean',
      required: false,
      visibility: 'user-or-llm',
      description: 'Whether to show completed tasks (default true)',
    },
    showDeleted: {
      type: 'boolean',
      required: false,
      visibility: 'user-or-llm',
      description: 'Whether to show deleted tasks (default false)',
    },
    showHidden: {
      type: 'boolean',
      required: false,
      visibility: 'user-or-llm',
      description: 'Whether to show hidden tasks (default false)',
    },
    dueMin: {
      type: 'string',
      required: false,
      visibility: 'user-or-llm',
      description: 'Lower bound for due date filter (RFC 3339 timestamp)',
    },
    dueMax: {
      type: 'string',
      required: false,
      visibility: 'user-or-llm',
      description: 'Upper bound for due date filter (RFC 3339 timestamp)',
    },
    completedMin: {
      type: 'string',
      required: false,
      visibility: 'user-or-llm',
      description: 'Lower bound for task completion date (RFC 3339 timestamp)',
    },
    completedMax: {
      type: 'string',
      required: false,
      visibility: 'user-or-llm',
      description: 'Upper bound for task completion date (RFC 3339 timestamp)',
    },
    updatedMin: {
      type: 'string',
      required: false,
      visibility: 'user-or-llm',
      description: 'Lower bound for last modification time (RFC 3339 timestamp)',
    },
  },

  request: {
    url: (params) => {
      const taskListId = params.taskListId || '@default'
      const queryParams = new URLSearchParams()
      if (params.maxResults) queryParams.set('maxResults', String(params.maxResults))
      if (params.pageToken) queryParams.set('pageToken', params.pageToken)
      if (params.showCompleted !== undefined)
        queryParams.set('showCompleted', String(params.showCompleted))
      if (params.showDeleted !== undefined)
        queryParams.set('showDeleted', String(params.showDeleted))
      if (params.showHidden !== undefined) queryParams.set('showHidden', String(params.showHidden))
      if (params.dueMin) queryParams.set('dueMin', params.dueMin)
      if (params.dueMax) queryParams.set('dueMax', params.dueMax)
      if (params.completedMin) queryParams.set('completedMin', params.completedMin)
      if (params.completedMax) queryParams.set('completedMax', params.completedMax)
      if (params.updatedMin) queryParams.set('updatedMin', params.updatedMin)
      const qs = queryParams.toString()
      return `${TASKS_API_BASE}/lists/${encodeURIComponent(taskListId)}/tasks${qs ? `?${qs}` : ''}`
    },
    method: 'GET',
    headers: (params) => ({
      Authorization: `Bearer ${params.accessToken}`,
    }),
  },

  transformResponse: async (response: Response) => {
    const data = await response.json()

    if (!response.ok) {
      throw new Error(data.error?.message ?? 'Failed to list tasks')
    }

    const items = data.items ?? []

    return {
      success: true,
      output: {
        tasks: items.map((item: Record<string, unknown>) => ({
          id: (item.id as string) ?? null,
          title: (item.title as string) ?? null,
          notes: (item.notes as string) ?? null,
          status: (item.status as string) ?? null,
          due: (item.due as string) ?? null,
          completed: (item.completed as string) ?? null,
          updated: (item.updated as string) ?? null,
          selfLink: (item.selfLink as string) ?? null,
          webViewLink: (item.webViewLink as string) ?? null,
          parent: (item.parent as string) ?? null,
          position: (item.position as string) ?? null,
          hidden: (item.hidden as boolean) ?? null,
          deleted: (item.deleted as boolean) ?? null,
          links: Array.isArray(item.links)
            ? (item.links as Array<Record<string, string>>).map((link) => ({
                type: link.type ?? '',
                description: link.description ?? '',
                link: link.link ?? '',
              }))
            : [],
        })),
        nextPageToken: data.nextPageToken ?? null,
      },
    }
  },

  outputs: {
    tasks: {
      type: 'array',
      description: 'List of tasks',
      items: {
        type: 'object',
        properties: {
          id: { type: 'string', description: 'Task identifier' },
          title: { type: 'string', description: 'Title of the task' },
          notes: { type: 'string', description: 'Notes/description for the task', optional: true },
          status: {
            type: 'string',
            description: 'Task status: "needsAction" or "completed"',
          },
          due: { type: 'string', description: 'Due date (RFC 3339 timestamp)', optional: true },
          completed: {
            type: 'string',
            description: 'Completion date (RFC 3339 timestamp)',
            optional: true,
          },
          updated: { type: 'string', description: 'Last modification time (RFC 3339 timestamp)' },
          selfLink: { type: 'string', description: 'URL pointing to this task' },
          webViewLink: {
            type: 'string',
            description: 'Link to task in Google Tasks UI',
            optional: true,
          },
          parent: { type: 'string', description: 'Parent task identifier', optional: true },
          position: {
            type: 'string',
            description: 'Position among sibling tasks (string-based ordering)',
          },
          hidden: { type: 'boolean', description: 'Whether the task is hidden', optional: true },
          deleted: { type: 'boolean', description: 'Whether the task is deleted', optional: true },
          links: {
            type: 'array',
            description: 'Collection of links associated with the task',
            optional: true,
            items: {
              type: 'object',
              properties: {
                type: {
                  type: 'string',
                  description: 'Link type (e.g., "email", "generic", "chat_message")',
                },
                description: { type: 'string', description: 'Link description' },
                link: { type: 'string', description: 'The URL' },
              },
            },
          },
        },
      },
    },
    nextPageToken: {
      type: 'string',
      description: 'Token for retrieving the next page of results',
      optional: true,
    },
  },
}