import { createLogger } from '@sim/logger'
import { type NextRequest, NextResponse } from 'next/server'
import {
  confluenceDeleteLabelContract,
  confluenceLabelMutationContract,
  confluenceListLabelsContract,
} from '@/lib/api/contracts/selectors/confluence'
import { parseRequest } from '@/lib/api/server'
import { checkSessionOrInternalAuth } from '@/lib/auth/hybrid'
import { validateAlphanumericId, validateJiraCloudId } from '@/lib/core/security/input-validation'
import { withRouteHandler } from '@/lib/core/utils/with-route-handler'
import { getConfluenceCloudId } from '@/tools/confluence/utils'
import { parseAtlassianErrorMessage } from '@/tools/jira/utils'

const logger = createLogger('ConfluenceLabelsAPI')

export const dynamic = 'force-dynamic'

// Add a label to a page
export const POST = withRouteHandler(async (request: NextRequest) => {
  try {
    const auth = await checkSessionOrInternalAuth(request)
    if (!auth.success || !auth.userId) {
      return NextResponse.json({ error: auth.error || 'Unauthorized' }, { status: 401 })
    }

    const parsed = await parseRequest(confluenceLabelMutationContract, request, {})
    if (!parsed.success) return parsed.response

    const {
      domain,
      accessToken,
      cloudId: providedCloudId,
      pageId,
      labelName,
      prefix: labelPrefix,
    } = parsed.data.body

    if (!domain) {
      return NextResponse.json({ error: 'Domain is required' }, { status: 400 })
    }

    if (!accessToken) {
      return NextResponse.json({ error: 'Access token is required' }, { status: 400 })
    }

    if (!pageId) {
      return NextResponse.json({ error: 'Page ID is required' }, { status: 400 })
    }

    if (!labelName) {
      return NextResponse.json({ error: 'Label name is required' }, { status: 400 })
    }

    const pageIdValidation = validateAlphanumericId(pageId, 'pageId', 255)
    if (!pageIdValidation.isValid) {
      return NextResponse.json({ error: pageIdValidation.error }, { status: 400 })
    }

    const cloudId = providedCloudId || (await getConfluenceCloudId(domain, accessToken))

    const cloudIdValidation = validateJiraCloudId(cloudId, 'cloudId')
    if (!cloudIdValidation.isValid) {
      return NextResponse.json({ error: cloudIdValidation.error }, { status: 400 })
    }

    const url = `https://api.atlassian.com/ex/confluence/${cloudId}/wiki/rest/api/content/${pageId}/label`

    const body = [
      {
        prefix: labelPrefix || 'global',
        name: labelName,
      },
    ]

    const response = await fetch(url, {
      method: 'POST',
      headers: {
        Accept: 'application/json',
        'Content-Type': 'application/json',
        Authorization: `Bearer ${accessToken}`,
      },
      body: JSON.stringify(body),
    })

    if (!response.ok) {
      const errorText = await response.text()
      logger.error('Confluence API error response:', {
        status: response.status,
        statusText: response.statusText,
        error: errorText,
      })
      return NextResponse.json(
        { error: parseAtlassianErrorMessage(response.status, response.statusText, errorText) },
        { status: response.status }
      )
    }

    const data = await response.json()
    const addedLabel = data.results?.[0] || data[0] || data
    return NextResponse.json({
      id: addedLabel.id ?? '',
      name: addedLabel.name ?? labelName,
      prefix: addedLabel.prefix ?? labelPrefix ?? 'global',
      pageId,
      labelName,
    })
  } catch (error) {
    logger.error('Error adding Confluence label:', error)
    return NextResponse.json(
      { error: (error as Error).message || 'Internal server error' },
      { status: 500 }
    )
  }
})

// List labels on a page
export const GET = withRouteHandler(async (request: NextRequest) => {
  try {
    const auth = await checkSessionOrInternalAuth(request)
    if (!auth.success || !auth.userId) {
      return NextResponse.json({ error: auth.error || 'Unauthorized' }, { status: 401 })
    }

    const parsed = await parseRequest(confluenceListLabelsContract, request, {})
    if (!parsed.success) return parsed.response

    const {
      domain,
      accessToken,
      pageId,
      cloudId: providedCloudId,
      limit,
      cursor,
    } = parsed.data.query

    if (!domain) {
      return NextResponse.json({ error: 'Domain is required' }, { status: 400 })
    }

    if (!accessToken) {
      return NextResponse.json({ error: 'Access token is required' }, { status: 400 })
    }

    if (!pageId) {
      return NextResponse.json({ error: 'Page ID is required' }, { status: 400 })
    }

    const pageIdValidation = validateAlphanumericId(pageId, 'pageId', 255)
    if (!pageIdValidation.isValid) {
      return NextResponse.json({ error: pageIdValidation.error }, { status: 400 })
    }

    const cloudId = providedCloudId || (await getConfluenceCloudId(domain, accessToken))

    const cloudIdValidation = validateJiraCloudId(cloudId, 'cloudId')
    if (!cloudIdValidation.isValid) {
      return NextResponse.json({ error: cloudIdValidation.error }, { status: 400 })
    }

    const queryParams = new URLSearchParams()
    queryParams.append('limit', String(Math.min(Number(limit), 250)))
    if (cursor) {
      queryParams.append('cursor', cursor)
    }
    const url = `https://api.atlassian.com/ex/confluence/${cloudId}/wiki/api/v2/pages/${pageId}/labels?${queryParams.toString()}`

    const response = await fetch(url, {
      method: 'GET',
      headers: {
        Accept: 'application/json',
        Authorization: `Bearer ${accessToken}`,
      },
    })

    if (!response.ok) {
      const errorText = await response.text()
      logger.error('Confluence API error response:', {
        status: response.status,
        statusText: response.statusText,
        error: errorText,
      })
      return NextResponse.json(
        { error: parseAtlassianErrorMessage(response.status, response.statusText, errorText) },
        { status: response.status }
      )
    }

    const data = await response.json()

    const labels = (data.results || []).map((label: any) => ({
      id: label.id,
      name: label.name,
      prefix: label.prefix || 'global',
    }))

    return NextResponse.json({
      labels,
      nextCursor: data._links?.next
        ? new URL(data._links.next, 'https://placeholder').searchParams.get('cursor')
        : null,
    })
  } catch (error) {
    logger.error('Error listing Confluence labels:', error)
    return NextResponse.json(
      { error: (error as Error).message || 'Internal server error' },
      { status: 500 }
    )
  }
})

// Delete a label from a page
export const DELETE = withRouteHandler(async (request: NextRequest) => {
  try {
    const auth = await checkSessionOrInternalAuth(request)
    if (!auth.success || !auth.userId) {
      return NextResponse.json({ error: auth.error || 'Unauthorized' }, { status: 401 })
    }

    const parsed = await parseRequest(confluenceDeleteLabelContract, request, {})
    if (!parsed.success) return parsed.response

    const { domain, accessToken, cloudId: providedCloudId, pageId, labelName } = parsed.data.body

    if (!domain) {
      return NextResponse.json({ error: 'Domain is required' }, { status: 400 })
    }

    if (!accessToken) {
      return NextResponse.json({ error: 'Access token is required' }, { status: 400 })
    }

    if (!pageId) {
      return NextResponse.json({ error: 'Page ID is required' }, { status: 400 })
    }

    if (!labelName) {
      return NextResponse.json({ error: 'Label name is required' }, { status: 400 })
    }

    const pageIdValidation = validateAlphanumericId(pageId, 'pageId', 255)
    if (!pageIdValidation.isValid) {
      return NextResponse.json({ error: pageIdValidation.error }, { status: 400 })
    }

    const cloudId = providedCloudId || (await getConfluenceCloudId(domain, accessToken))

    const cloudIdValidation = validateJiraCloudId(cloudId, 'cloudId')
    if (!cloudIdValidation.isValid) {
      return NextResponse.json({ error: cloudIdValidation.error }, { status: 400 })
    }

    const encodedLabel = encodeURIComponent(labelName.trim())
    const url = `https://api.atlassian.com/ex/confluence/${cloudId}/wiki/rest/api/content/${pageId}/label?name=${encodedLabel}`

    const response = await fetch(url, {
      method: 'DELETE',
      headers: {
        Accept: 'application/json',
        Authorization: `Bearer ${accessToken}`,
      },
    })

    if (!response.ok) {
      const errorText = await response.text()
      logger.error('Confluence API error response:', {
        status: response.status,
        statusText: response.statusText,
        error: errorText,
      })
      return NextResponse.json(
        { error: parseAtlassianErrorMessage(response.status, response.statusText, errorText) },
        { status: response.status }
      )
    }

    return NextResponse.json({
      pageId,
      labelName,
      deleted: true,
    })
  } catch (error) {
    logger.error('Error deleting Confluence label:', error)
    return NextResponse.json(
      { error: (error as Error).message || 'Internal server error' },
      { status: 500 }
    )
  }
})
