#!/usr/bin/env tsx
/**
 * Import Catholic churches from Baidu Maps (China)
 * Usage:
 *   npx tsx scripts/import-baidu-churches.ts
 *   npx tsx scripts/import-baidu-churches.ts --dry-run
 *   npx tsx scripts/import-baidu-churches.ts --resume-from-cell 100
 *   npx tsx scripts/import-baidu-churches.ts --job-id <uuid>
 */

import dotenv from 'dotenv';
import path from 'path';

dotenv.config({ path: path.resolve(process.cwd(), '.env.local') });
dotenv.config({ path: path.resolve(process.cwd(), '.env') });

import { Pool } from 'pg';
import { PrismaPg } from '@prisma/adapter-pg';
import { PrismaClient } from '@prisma/client';

const dbUrl = process.env.DATABASE_URL || 'postgresql://postgres:postgres@localhost:5432/nearestmass';
console.log(`Connecting to database: ${dbUrl.replace(/:[^:@]+@/, ':***@')}`);
const pool = new Pool({
  connectionString: dbUrl,
  ssl: dbUrl.includes('neon') ? { rejectUnauthorized: false } : undefined,
});
const adapter = new PrismaPg(pool);
const prisma = new PrismaClient({ adapter });

import { queryBaiduByGrid, type BaiduChurch } from '../src/lib/baidu-client';
import { findDuplicateChurch, mergeBaiduData, type ExistingChurch } from '../src/lib/church-matcher';

interface ImportStats {
  baiduChurchesFound: number;
  newChurchesInserted: number;
  existingUpdated: number;
  existingLinked: number;
  errors: number;
}

function parseArgs(): { dryRun: boolean; resumeFromCell: number; jobId?: string } {
  const args = process.argv.slice(2);
  const result = {
    dryRun: false,
    resumeFromCell: 0,
    jobId: undefined as string | undefined,
  };

  for (let i = 0; i < args.length; i++) {
    if (args[i] === '--dry-run') {
      result.dryRun = true;
    } else if (args[i] === '--resume-from-cell' && args[i + 1]) {
      result.resumeFromCell = parseInt(args[i + 1], 10);
      i++;
    } else if (args[i] === '--job-id' && args[i + 1]) {
      result.jobId = args[i + 1];
      i++;
    }
  }

  return result;
}

async function createOrResumeJob(jobId?: string): Promise<string | null> {
  if (jobId) {
    await prisma.backgroundJob.update({
      where: { id: jobId },
      data: { status: 'running', startedAt: new Date() },
    });
    return jobId;
  }
  return null;
}

async function completeJob(jobId: string | null, error?: string): Promise<void> {
  if (!jobId) return;
  try {
    await prisma.backgroundJob.update({
      where: { id: jobId },
      data: {
        status: error ? 'failed' : 'completed',
        error: error || null,
        completedAt: new Date(),
      },
    });
  } catch (err) {
    console.error(`Failed to update job ${jobId}:`, err);
  }
}

async function updateJobProgress(jobId: string | null, stats: ImportStats, totalCells: number, currentCell: number): Promise<void> {
  if (!jobId) return;
  try {
    await prisma.backgroundJob.update({
      where: { id: jobId },
      data: {
        totalItems: totalCells,
        processed: currentCell,
        succeeded: stats.newChurchesInserted + stats.existingUpdated + stats.existingLinked,
        failed: stats.errors,
        itemsFound: stats.baiduChurchesFound,
      },
    });
  } catch (err) {
    // Non-fatal — just log it
    console.error(`Failed to update job progress:`, err);
  }
}

async function importFromBaidu(dryRun: boolean, resumeFromCell: number, jobId: string | null): Promise<ImportStats> {
  const stats: ImportStats = {
    baiduChurchesFound: 0,
    newChurchesInserted: 0,
    existingUpdated: 0,
    existingLinked: 0,
    errors: 0,
  };

  const apiKey = process.env.BAIDU_MAPS_API_KEY;
  if (!apiKey) {
    throw new Error('Missing BAIDU_MAPS_API_KEY environment variable');
  }

  console.log(`\n${'='.repeat(60)}`);
  console.log(`Importing Catholic churches from Baidu Maps (China)`);
  console.log(`${'='.repeat(60)}\n`);

  // Step 1: Query Baidu API
  console.log('Step 1: Querying Baidu Maps API...');
  const baiduChurches = await queryBaiduByGrid(
    apiKey,
    (progress) => {
      updateJobProgress(jobId, stats, progress.totalCells, progress.cellIndex);
    },
    resumeFromCell,
  );

  stats.baiduChurchesFound = baiduChurches.length;
  console.log(`\nFound ${baiduChurches.length} churches from Baidu Maps`);

  if (baiduChurches.length === 0) {
    console.log('No churches found');
    return stats;
  }

  if (dryRun) {
    console.log('\n[DRY RUN] Would import the following churches:');
    baiduChurches.slice(0, 20).forEach((church) => {
      console.log(`  - ${church.name} (${church.city || church.province || 'unknown'})`);
      console.log(`    Baidu ID: ${church.baiduId}, Coords: ${church.lat.toFixed(4)}, ${church.lng.toFixed(4)}`);
    });
    if (baiduChurches.length > 20) {
      console.log(`  ... and ${baiduChurches.length - 20} more`);
    }
    return stats;
  }

  // Step 2: Load existing churches in China for deduplication
  console.log('\nStep 2: Loading existing churches in China for deduplication...');
  const existingChurches: ExistingChurch[] = await prisma.church.findMany({
    where: { country: 'CN' },
    select: {
      id: true,
      name: true,
      latitude: true,
      longitude: true,
      osmId: true,
      baiduId: true,
      masstimesId: true,
      orarimesseId: true,
      massSchedulesPhId: true,
      philmassId: true,
      horariosMisasId: true,
      mszeInfoId: true,
      weekdayMassesId: true,
      messesInfoId: true,
      bohosluzbyId: true,
      miserendId: true,
      kerknetId: true,
      gottesdienstzeitenId: true,
      discovermassId: true,
      source: true,
      website: true,
      phone: true,
      address: true,
    },
  });
  console.log(`Found ${existingChurches.length} existing churches in China`);

  // Step 3: Process each Baidu church
  console.log('\nStep 3: Processing churches...');
  let processed = 0;

  for (const baiduChurch of baiduChurches) {
    try {
      const candidate = {
        name: baiduChurch.name,
        lat: baiduChurch.lat,
        lng: baiduChurch.lng,
        baiduId: baiduChurch.baiduId,
      };

      const duplicate = findDuplicateChurch(candidate, existingChurches);

      if (duplicate && duplicate.baiduId === baiduChurch.baiduId) {
        // Existing church with matching baiduId — update it
        const mergedData = mergeBaiduData(duplicate, baiduChurch);
        await prisma.church.update({
          where: { id: duplicate.id },
          data: mergedData,
        });
        stats.existingUpdated++;
      } else if (duplicate) {
        // Existing church matched by proximity/name — link it with baiduId
        const mergedData = mergeBaiduData(duplicate, baiduChurch);
        await prisma.church.update({
          where: { id: duplicate.id },
          data: mergedData,
        });
        stats.existingLinked++;
      } else {
        // New church — insert it
        const newChurch = await prisma.church.create({
          data: {
            name: baiduChurch.name,
            latitude: baiduChurch.lat,
            longitude: baiduChurch.lng,
            address: baiduChurch.address,
            city: baiduChurch.city,
            state: baiduChurch.province,
            country: 'CN',
            phone: baiduChurch.phone,
            website: baiduChurch.website,
            source: 'baidu',
            baiduId: baiduChurch.baiduId,
            baiduLastSyncedAt: new Date(),
            hasWebsite: !!baiduChurch.website,
          },
        });
        stats.newChurchesInserted++;

        // Add to existing churches list for dedup within this run
        existingChurches.push({
          id: newChurch.id,
          name: baiduChurch.name,
          latitude: baiduChurch.lat,
          longitude: baiduChurch.lng,
          osmId: null,
          baiduId: baiduChurch.baiduId,
          masstimesId: null,
          orarimesseId: null,
          massSchedulesPhId: null,
          philmassId: null,
          horariosMisasId: null,
          mszeInfoId: null,
          weekdayMassesId: null,
          messesInfoId: null,
          bohosluzbyId: null,
          miserendId: null,
          kerknetId: null,
          gottesdienstzeitenId: null,
          discovermassId: null,
          source: 'baidu',
          website: baiduChurch.website || null,
          phone: baiduChurch.phone || null,
          address: baiduChurch.address || null,
        });
      }

      processed++;
      if (processed % 500 === 0) {
        console.log(`Progress: ${processed}/${baiduChurches.length} churches processed`);
        await updateJobProgress(jobId, stats, baiduChurches.length, processed);
      }
    } catch (error) {
      console.error(`Error processing church ${baiduChurch.name} (${baiduChurch.baiduId}):`, error);
      stats.errors++;
    }
  }

  console.log(`\nProcessed all ${baiduChurches.length} churches`);
  return stats;
}

function printSummary(stats: ImportStats, dryRun: boolean) {
  console.log(`\n${'='.repeat(60)}`);
  console.log(`Baidu Import Summary ${dryRun ? '(DRY RUN)' : ''}`);
  console.log(`${'='.repeat(60)}`);
  console.log(`Baidu churches found:         ${stats.baiduChurchesFound}`);

  if (!dryRun) {
    console.log(`New churches inserted:        ${stats.newChurchesInserted}`);
    console.log(`Existing churches updated:    ${stats.existingUpdated} (matched by baiduId)`);
    console.log(`Existing churches linked:     ${stats.existingLinked} (matched by proximity)`);
  }

  if (!dryRun && stats.errors > 0) {
    console.log(`Errors encountered:           ${stats.errors}`);
  }

  console.log(`${'='.repeat(60)}\n`);
}

async function main() {
  const { dryRun, resumeFromCell, jobId: argJobId } = parseArgs();
  const jobId = await createOrResumeJob(argJobId);

  if (dryRun) {
    console.log('\n*** DRY RUN MODE - No changes will be made to database ***\n');
  }

  try {
    const stats = await importFromBaidu(dryRun, resumeFromCell, jobId);
    printSummary(stats, dryRun);
    await completeJob(jobId);
  } catch (error) {
    console.error('Fatal error:', error);
    await completeJob(jobId, String(error));
    process.exit(1);
  } finally {
    await prisma.$disconnect();
  }
}

main();