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

export const deleteTool: ToolConfig<SupabaseDeleteParams, SupabaseDeleteResponse> = {
  id: 'supabase_delete',
  name: 'Supabase Delete Row',
  description: 'Delete rows from a Supabase table based on filter criteria',
  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 delete from',
    },
    schema: {
      type: 'string',
      required: false,
      visibility: 'user-or-llm',
      description:
        'Database schema to delete from (default: public). Use this to access tables in other schemas.',
    },
    filter: {
      type: 'string',
      required: true,
      visibility: 'user-or-llm',
      description: 'PostgREST filter to identify rows to delete (e.g., "id=eq.123")',
    },
    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)

      let url = `${supabaseBaseUrl(params.projectId)}/rest/v1/${encodeURIComponent(params.table)}?select=*`

      if (params.filter?.trim()) {
        url += `&${params.filter.trim()}`
      } else {
        throw new Error(
          'Filter is required for delete operations to prevent accidental deletion of all rows'
        )
      }

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

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

    if (text?.trim()) {
      try {
        data = JSON.parse(text)
      } catch (parseError) {
        throw new Error(`Failed to parse Supabase response: ${parseError}`)
      }
    } else {
      data = []
    }

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

    if (deletedCount === 0) {
      return {
        success: true,
        output: {
          message: 'No rows were deleted (no matching records found)',
          results: data,
        },
        error: undefined,
      }
    }

    return {
      success: true,
      output: {
        message: `Successfully deleted ${deletedCount} row${deletedCount === 1 ? '' : 's'}`,
        results: data,
      },
      error: undefined,
    }
  },

  outputs: {
    message: { type: 'string', description: 'Operation status message' },
    results: { type: 'array', description: 'Array of deleted records' },
  },
}