import { validateDatabaseIdentifier } from '@/lib/core/security/input-validation'
import type { SupabaseQueryParams, SupabaseQueryResponse } from '@/tools/supabase/types'
import { supabaseBaseUrl } from '@/tools/supabase/utils'
import type { ToolConfig } from '@/tools/types'

export const queryTool: ToolConfig<SupabaseQueryParams, SupabaseQueryResponse> = {
  id: 'supabase_query',
  name: 'Supabase Query',
  description: 'Query data from a Supabase table',
  version: '1.0.0',

  params: {
    projectId: {
      type: 'string',
      required: true,
      visibility: 'user-only',
      description: 'Your Supabase project ID (e.g., jdrkgepadsdopsntdlom)',
    },
    table: {
      type: 'string',
      required: true,
      visibility: 'user-or-llm',
      description: 'The name of the Supabase table to query',
    },
    schema: {
      type: 'string',
      required: false,
      visibility: 'user-or-llm',
      description:
        'Database schema to query from (default: public). Use this to access tables in other schemas.',
    },
    select: {
      type: 'string',
      required: false,
      visibility: 'user-or-llm',
      description: 'Columns to return (comma-separated). Defaults to * (all columns)',
    },
    filter: {
      type: 'string',
      required: false,
      visibility: 'user-or-llm',
      description: 'PostgREST filter (e.g., "id=eq.123")',
    },
    orderBy: {
      type: 'string',
      required: false,
      visibility: 'user-or-llm',
      description: 'Column to order by (add DESC for descending)',
    },
    limit: {
      type: 'number',
      required: false,
      visibility: 'user-or-llm',
      description: 'Maximum number of rows to return',
    },
    offset: {
      type: 'number',
      required: false,
      visibility: 'user-or-llm',
      description: 'Number of rows to skip (for pagination)',
    },
    apiKey: {
      type: 'string',
      required: true,
      visibility: 'user-only',
      description: 'Your Supabase service role secret key',
    },
  },

  request: {
    url: (params) => {
      const tableValidation = validateDatabaseIdentifier(params.table, 'table')
      if (!tableValidation.isValid) throw new Error(tableValidation.error)
      const selectColumns = params.select?.trim() || '*'
      let url = `${supabaseBaseUrl(params.projectId)}/rest/v1/${encodeURIComponent(params.table)}?select=${encodeURIComponent(selectColumns)}`

      // Add filters if provided - using PostgREST syntax
      if (params.filter?.trim()) {
        url += `&${params.filter.trim()}`
      }

      // Add order by if provided
      if (params.orderBy) {
        let orderParam = params.orderBy.trim()

        // Check if DESC is specified (case-insensitive)
        if (/\s+DESC$/i.test(orderParam)) {
          orderParam = `${orderParam.replace(/\s+DESC$/i, '').trim()}.desc`
        }
        // Check if ASC is specified (case-insensitive)
        else if (/\s+ASC$/i.test(orderParam)) {
          orderParam = `${orderParam.replace(/\s+ASC$/i, '').trim()}.asc`
        }
        // Default to ascending if no direction specified
        else {
          orderParam = `${orderParam}.asc`
        }

        url += `&order=${orderParam}`
      }

      // Add limit if provided
      if (params.limit !== undefined && params.limit !== null) {
        url += `&limit=${Number(params.limit)}`
      }

      // Add offset if provided
      if (params.offset !== undefined && params.offset !== null) {
        url += `&offset=${Number(params.offset)}`
      }

      return url
    },
    method: 'GET',
    headers: (params) => {
      const headers: Record<string, string> = {
        apikey: params.apiKey,
        Authorization: `Bearer ${params.apiKey}`,
      }
      if (params.schema) {
        headers['Accept-Profile'] = params.schema
      }
      return headers
    },
  },

  transformResponse: async (response: Response) => {
    let data
    try {
      data = await response.json()
    } catch (parseError) {
      throw new Error(`Failed to parse Supabase response: ${parseError}`)
    }

    const rowCount = Array.isArray(data) ? data.length : 0

    if (rowCount === 0) {
      return {
        success: true,
        output: {
          message: 'No rows found matching the query criteria',
          results: data,
        },
        error: undefined,
      }
    }

    return {
      success: true,
      output: {
        message: `Successfully queried ${rowCount} row${rowCount === 1 ? '' : 's'} from Supabase`,
        results: data,
      },
      error: undefined,
    }
  },

  outputs: {
    message: { type: 'string', description: 'Operation status message' },
    results: { type: 'array', description: 'Array of records returned from the query' },
  },
}