import type {
  AhrefsReferringDomainsParams,
  AhrefsReferringDomainsResponse,
} from '@/tools/ahrefs/types'
import type { ToolConfig } from '@/tools/types'

export const referringDomainsTool: ToolConfig<
  AhrefsReferringDomainsParams,
  AhrefsReferringDomainsResponse
> = {
  id: 'ahrefs_referring_domains',
  name: 'Ahrefs Referring Domains',
  description:
    'Get a list of domains that link to a target domain or URL. Returns unique referring domains with their domain rating, backlink counts, and discovery dates.',
  version: '1.0.0',

  params: {
    target: {
      type: 'string',
      required: true,
      visibility: 'user-or-llm',
      description: 'The target domain or URL to analyze',
    },
    mode: {
      type: 'string',
      required: false,
      visibility: 'user-only',
      description:
        'Analysis mode: domain (entire domain), prefix (URL prefix), subdomains (include all subdomains), exact (exact URL match)',
    },
    date: {
      type: 'string',
      required: false,
      visibility: 'user-only',
      description: 'Date for historical data in YYYY-MM-DD format (defaults to today)',
    },
    limit: {
      type: 'number',
      required: false,
      visibility: 'user-only',
      description: 'Maximum number of results to return (default: 100)',
    },
    offset: {
      type: 'number',
      required: false,
      visibility: 'user-only',
      description: 'Number of results to skip for pagination',
    },
    apiKey: {
      type: 'string',
      required: true,
      visibility: 'user-only',
      description: 'Ahrefs API Key',
    },
  },

  request: {
    url: (params) => {
      const url = new URL('https://api.ahrefs.com/v3/site-explorer/refdomains')
      url.searchParams.set('target', params.target)
      // Date is required - default to today if not provided
      const date = params.date || new Date().toISOString().split('T')[0]
      url.searchParams.set('date', date)
      if (params.mode) url.searchParams.set('mode', params.mode)
      if (params.limit) url.searchParams.set('limit', String(params.limit))
      if (params.offset) url.searchParams.set('offset', String(params.offset))
      return url.toString()
    },
    method: 'GET',
    headers: (params) => ({
      Accept: 'application/json',
      Authorization: `Bearer ${params.apiKey}`,
    }),
  },

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

    if (!response.ok) {
      throw new Error(data.error?.message || data.error || 'Failed to get referring domains')
    }

    const referringDomains = (data.refdomains || data.referring_domains || []).map(
      (domain: any) => ({
        domain: domain.domain || domain.refdomain || '',
        domainRating: domain.domain_rating ?? 0,
        backlinks: domain.backlinks ?? 0,
        dofollowBacklinks: domain.dofollow_backlinks ?? domain.dofollow ?? 0,
        firstSeen: domain.first_seen || '',
        lastVisited: domain.last_visited || '',
      })
    )

    return {
      success: true,
      output: {
        referringDomains,
      },
    }
  },

  outputs: {
    referringDomains: {
      type: 'array',
      description: 'List of domains linking to the target',
      items: {
        type: 'object',
        properties: {
          domain: { type: 'string', description: 'The referring domain' },
          domainRating: { type: 'number', description: 'Domain Rating of the referring domain' },
          backlinks: {
            type: 'number',
            description: 'Total number of backlinks from this domain',
          },
          dofollowBacklinks: {
            type: 'number',
            description: 'Number of dofollow backlinks from this domain',
          },
          firstSeen: { type: 'string', description: 'When the domain was first seen linking' },
          lastVisited: { type: 'string', description: 'When the domain was last checked' },
        },
      },
    },
  },
}
