import { createLogger } from '@sim/logger'
import {
  CALENDAR_API_BASE,
  type GoogleCalendarApiEventResponse,
  type GoogleCalendarQuickAddParams,
  type GoogleCalendarQuickAddResponse,
} from '@/tools/google_calendar/types'
import type { ToolConfig } from '@/tools/types'

const logger = createLogger('GoogleCalendarQuickAddTool')

export const quickAddTool: ToolConfig<
  GoogleCalendarQuickAddParams,
  GoogleCalendarQuickAddResponse
> = {
  id: 'google_calendar_quick_add',
  name: 'Google Calendar Quick Add',
  description: 'Create events from natural language text',
  version: '1.0.0',

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

  params: {
    accessToken: {
      type: 'string',
      required: true,
      visibility: 'hidden',
      description: 'Access token for Google Calendar API',
    },
    calendarId: {
      type: 'string',
      required: false,
      visibility: 'user-or-llm',
      description: 'Google Calendar ID (e.g., primary or calendar@group.calendar.google.com)',
    },
    text: {
      type: 'string',
      required: true,
      visibility: 'user-or-llm',
      description:
        'Natural language text describing the event (e.g., "Meeting with John tomorrow at 3pm")',
    },
    attendees: {
      type: 'array',
      required: false,
      visibility: 'user-or-llm',
      description: 'Array of attendee email addresses (comma-separated string also accepted)',
    },
    sendUpdates: {
      type: 'string',
      required: false,
      visibility: 'user-only',
      description: 'How to send updates to attendees: all, externalOnly, or none',
    },
  },

  request: {
    url: (params: GoogleCalendarQuickAddParams) => {
      const calendarId = params.calendarId || 'primary'
      const queryParams = new URLSearchParams()

      queryParams.append('text', params.text)

      if (params.sendUpdates !== undefined) {
        queryParams.append('sendUpdates', params.sendUpdates)
      }

      return `${CALENDAR_API_BASE}/calendars/${encodeURIComponent(calendarId)}/events/quickAdd?${queryParams.toString()}`
    },
    method: 'POST',
    headers: (params: GoogleCalendarQuickAddParams) => ({
      Authorization: `Bearer ${params.accessToken}`,
      'Content-Type': 'application/json',
    }),
  },

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

    let finalEventData: GoogleCalendarApiEventResponse = data
    if (params?.attendees) {
      let attendeeList: string[] = []
      const attendees = params.attendees as string | string[]

      if (Array.isArray(attendees)) {
        attendeeList = attendees.filter((email: string) => email && email.trim().length > 0)
      } else if (typeof attendees === 'string' && attendees.trim().length > 0) {
        attendeeList = attendees
          .split(',')
          .map((email: string) => email.trim())
          .filter((email: string) => email.length > 0)
      }

      if (attendeeList.length > 0) {
        try {
          const calendarId = params.calendarId || 'primary'
          const eventId = data.id

          const updateData = {
            attendees: attendeeList.map((email: string) => ({ email })),
          }

          const updateQueryParams = new URLSearchParams()
          if (params.sendUpdates !== undefined) {
            updateQueryParams.append('sendUpdates', params.sendUpdates)
          }

          const updateUrl = `${CALENDAR_API_BASE}/calendars/${encodeURIComponent(calendarId)}/events/${eventId}${updateQueryParams.toString() ? `?${updateQueryParams.toString()}` : ''}`

          const updateResponse = await fetch(updateUrl, {
            method: 'PATCH',
            headers: {
              Authorization: `Bearer ${params.accessToken}`,
              'Content-Type': 'application/json',
            },
            body: JSON.stringify(updateData),
          })

          if (updateResponse.ok) {
            finalEventData = await updateResponse.json()
          } else {
            logger.warn('Failed to add attendees to quick-added event', {
              error: await updateResponse.text(),
            })
          }
        } catch (error) {
          logger.warn('Error adding attendees to quick-added event', { error })
        }
      }
    }

    return {
      success: true,
      output: {
        content: `Event "${finalEventData?.summary || 'Untitled'}" created successfully ${finalEventData?.attendees?.length ? ` with ${finalEventData.attendees.length} attendee(s)` : ''}`,
        metadata: {
          id: finalEventData.id,
          htmlLink: finalEventData.htmlLink,
          status: finalEventData.status,
          summary: finalEventData.summary,
          description: finalEventData.description,
          location: finalEventData.location,
          start: finalEventData.start,
          end: finalEventData.end,
          attendees: finalEventData.attendees,
          creator: finalEventData.creator,
          organizer: finalEventData.organizer,
        },
      },
    }
  },

  outputs: {
    content: {
      type: 'string',
      description: 'Event creation confirmation message from natural language',
    },
    metadata: {
      type: 'json',
      description: 'Created event metadata including parsed details',
      properties: {
        id: { type: 'string', description: 'Event ID' },
        htmlLink: { type: 'string', description: 'URL to view the event in Google Calendar' },
        status: { type: 'string', description: 'Event status (confirmed, tentative, cancelled)' },
        summary: { type: 'string', description: 'Event title' },
        description: { type: 'string', description: 'Event description' },
        location: { type: 'string', description: 'Event location' },
        start: { type: 'object', description: 'Event start time' },
        end: { type: 'object', description: 'Event end time' },
        attendees: { type: 'array', description: 'List of event attendees' },
        creator: { type: 'object', description: 'Event creator info' },
        organizer: { type: 'object', description: 'Event organizer info' },
      },
    },
  },
}

interface GoogleCalendarQuickAddV2Response {
  success: boolean
  output: {
    id: string
    htmlLink: string
    status: string
    summary: string | null
    description: string | null
    location: string | null
    start: GoogleCalendarApiEventResponse['start']
    end: GoogleCalendarApiEventResponse['end']
    attendees: GoogleCalendarApiEventResponse['attendees'] | null
    creator: GoogleCalendarApiEventResponse['creator']
    organizer: GoogleCalendarApiEventResponse['organizer']
  }
}

export const quickAddV2Tool: ToolConfig<
  GoogleCalendarQuickAddParams,
  GoogleCalendarQuickAddV2Response
> = {
  id: 'google_calendar_quick_add_v2',
  name: 'Google Calendar Quick Add',
  description: 'Create events from natural language text. Returns API-aligned fields only.',
  version: '2.0.0',
  oauth: quickAddTool.oauth,
  params: quickAddTool.params,
  request: quickAddTool.request,
  transformResponse: async (response: Response, params) => {
    const data: GoogleCalendarApiEventResponse = await response.json()

    let finalEventData: GoogleCalendarApiEventResponse = data
    if (params?.attendees) {
      let attendeeList: string[] = []
      const attendees = params.attendees as string | string[]

      if (Array.isArray(attendees)) {
        attendeeList = attendees.filter((email: string) => email && email.trim().length > 0)
      } else if (typeof attendees === 'string' && attendees.trim().length > 0) {
        attendeeList = attendees
          .split(',')
          .map((email: string) => email.trim())
          .filter((email: string) => email.length > 0)
      }

      if (attendeeList.length > 0) {
        try {
          const calendarId = params.calendarId || 'primary'
          const eventId = data.id

          const updateData = {
            attendees: attendeeList.map((email: string) => ({ email })),
          }

          const updateQueryParams = new URLSearchParams()
          if (params.sendUpdates !== undefined) {
            updateQueryParams.append('sendUpdates', params.sendUpdates)
          }

          const updateUrl = `${CALENDAR_API_BASE}/calendars/${encodeURIComponent(calendarId)}/events/${eventId}${updateQueryParams.toString() ? `?${updateQueryParams.toString()}` : ''}`

          const updateResponse = await fetch(updateUrl, {
            method: 'PATCH',
            headers: {
              Authorization: `Bearer ${params.accessToken}`,
              'Content-Type': 'application/json',
            },
            body: JSON.stringify(updateData),
          })

          if (updateResponse.ok) {
            finalEventData = await updateResponse.json()
          } else {
            logger.warn('Failed to add attendees to quick-added event', {
              error: await updateResponse.text(),
            })
          }
        } catch (error) {
          logger.warn('Error adding attendees to quick-added event', { error })
        }
      }
    }

    return {
      success: true,
      output: {
        id: finalEventData.id,
        htmlLink: finalEventData.htmlLink,
        status: finalEventData.status,
        summary: finalEventData.summary ?? null,
        description: finalEventData.description ?? null,
        location: finalEventData.location ?? null,
        start: finalEventData.start,
        end: finalEventData.end,
        attendees: finalEventData.attendees ?? null,
        creator: finalEventData.creator,
        organizer: finalEventData.organizer,
      },
    }
  },
  outputs: {
    id: { type: 'string', description: 'Event ID' },
    htmlLink: { type: 'string', description: 'Event link' },
    status: { type: 'string', description: 'Event status' },
    summary: { type: 'string', description: 'Event title', optional: true },
    description: { type: 'string', description: 'Event description', optional: true },
    location: { type: 'string', description: 'Event location', optional: true },
    start: { type: 'json', description: 'Event start' },
    end: { type: 'json', description: 'Event end' },
    attendees: { type: 'json', description: 'Event attendees', optional: true },
    creator: { type: 'json', description: 'Event creator' },
    organizer: { type: 'json', description: 'Event organizer' },
  },
}