import { createLogger } from '@sim/logger'
import { type NextRequest, NextResponse } from 'next/server'
import { confluenceSpacePermissionsContract } from '@/lib/api/contracts/selectors/confluence'
import { parseRequest } from '@/lib/api/server'
import { checkSessionOrInternalAuth } from '@/lib/auth/hybrid'
import {
  validateAlphanumericId,
  validateJiraCloudId,
  validatePaginationCursor,
} 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('ConfluenceSpacePermissionsAPI')

export const dynamic = 'force-dynamic'

/**
 * List permissions for a Confluence space.
 * Uses GET /wiki/api/v2/spaces/{id}/permissions
 */
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(confluenceSpacePermissionsContract, request, {})
    if (!parsed.success) return parsed.response

    const {
      domain,
      accessToken,
      spaceId,
      cloudId: providedCloudId,
      limit,
      cursor,
    } = 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 (!spaceId) {
      return NextResponse.json({ error: 'Space ID is required' }, { status: 400 })
    }

    const spaceIdValidation = validateAlphanumericId(spaceId, 'spaceId', 255)
    if (!spaceIdValidation.isValid) {
      return NextResponse.json({ error: spaceIdValidation.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(limit, 250)))

    if (cursor) {
      const cursorValidation = validatePaginationCursor(cursor, 'cursor')
      if (!cursorValidation.isValid) {
        return NextResponse.json({ error: cursorValidation.error }, { status: 400 })
      }
      queryParams.append('cursor', cursor)
    }

    const url = `https://api.atlassian.com/ex/confluence/${cloudId}/wiki/api/v2/spaces/${spaceId}/permissions?${queryParams.toString()}`

    logger.info(`Fetching permissions for space ${spaceId}`)

    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 permissions = (data.results || []).map((perm: any) => ({
      id: perm.id,
      principalType: perm.principal?.type ?? null,
      principalId: perm.principal?.id ?? null,
      operationKey: perm.operation?.key ?? null,
      operationTargetType: perm.operation?.targetType ?? null,
      anonymousAccess: perm.anonymousAccess ?? false,
      unlicensedAccess: perm.unlicensedAccess ?? false,
    }))

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