import { pathToFileURL } from 'node:url';

import { createApp } from './app.js';
import { type AppConfig, loadConfig } from './config.js';
import type { AppContext } from './context.js';
import { createDatabase } from './db.js';
import { createLogger } from './logging.js';
import { AuthAuditLogRepository } from './repositories/authAuditLogRepository.js';
import { AuthIdentityRepository } from './repositories/authIdentityRepository.js';
import { AuthRiskBlockRepository } from './repositories/authRiskBlockRepository.js';
import { RpgAgentSessionRepository } from './repositories/RpgAgentSessionRepository.js';
import { RpgWorldProfileRepository } from './repositories/RpgWorldProfileRepository.js';
import { RpgSaveArchiveRepository } from './repositories/rpg-entry/RpgSaveArchiveRepository.js';
import { RpgWorldLibraryRepository } from './repositories/rpg-entry/RpgWorldLibraryRepository.js';
import { RpgBrowseHistoryRepository } from './repositories/rpg-profile/RpgBrowseHistoryRepository.js';
import { RpgProfileDashboardRepository } from './repositories/rpg-profile/RpgProfileDashboardRepository.js';
import { RpgRuntimeSnapshotRepository } from './repositories/rpg-runtime/RpgRuntimeSnapshotRepository.js';
import { RuntimeRepository } from './repositories/runtimeRepository.js';
import { SmsAuthEventRepository } from './repositories/smsAuthEventRepository.js';
import { UserRepository } from './repositories/userRepository.js';
import { UserSessionRepository } from './repositories/userSessionRepository.js';
import { CaptchaChallengeStore } from './services/captchaChallengeStore.js';
import { CustomWorldAgentAutoAssetService } from './services/customWorldAgentAutoAssetService.js';
import { CustomWorldAgentOrchestrator } from './services/customWorldAgentOrchestrator.js';
import { CustomWorldAgentSessionStore } from './services/customWorldAgentSessionStore.js';
import { UpstreamLlmClient } from './services/llmClient.js';
import { RpgWorldWorkSummaryService } from './services/RpgWorldWorkSummaryService.js';
import { createSmsVerificationService } from './services/smsVerificationService.js';
import { createWechatAuthService } from './services/wechatAuthService.js';
import { WechatAuthStateStore } from './services/wechatAuthStateStore.js';

function resolveListenTarget(serverAddr: string) {
  const trimmed = serverAddr.trim();
  if (!trimmed) {
    return { host: '0.0.0.0', port: 8081 };
  }
  if (trimmed.startsWith(':')) {
    return {
      host: '0.0.0.0',
      port: Number(trimmed.slice(1)),
    };
  }
  if (trimmed.startsWith('http://') || trimmed.startsWith('https://')) {
    const url = new URL(trimmed);
    return {
      host: url.hostname,
      port: Number(url.port || 80),
    };
  }
  if (trimmed.includes(':')) {
    const [host, portText] = trimmed.split(':');
    return {
      host: host || '0.0.0.0',
      port: Number(portText),
    };
  }
  return {
    host: '0.0.0.0',
    port: Number(trimmed),
  };
}

function describeDatabase(databaseUrl: string) {
  if (databaseUrl.startsWith('pg-mem://')) {
    return {
      database_engine: 'pg-mem',
      database_name: databaseUrl.slice('pg-mem://'.length) || 'memory',
    };
  }

  try {
    const url = new URL(databaseUrl);
    return {
      database_engine: url.protocol.replace(/:$/u, ''),
      database_host: url.hostname,
      database_port: Number(url.port || 5432),
      database_name: url.pathname.replace(/^\/+/u, '') || 'postgres',
    };
  } catch {
    return {
      database_engine: 'postgresql',
      database_target: 'configured',
    };
  }
}

export async function createAppContext(config: AppConfig = loadConfig()) {
  const logger = createLogger(config);
  const db = await createDatabase(config);
  const rpgAgentSessionRepository = new RpgAgentSessionRepository(db);
  const rpgWorldProfileRepository = new RpgWorldProfileRepository(db);
  const runtimeRepository = new RuntimeRepository(db);
  const rpgProfileDashboardRepository = new RpgProfileDashboardRepository(
    runtimeRepository,
  );
  const rpgBrowseHistoryRepository = new RpgBrowseHistoryRepository(
    runtimeRepository,
  );
  const rpgSaveArchiveRepository = new RpgSaveArchiveRepository(
    runtimeRepository,
  );
  const rpgWorldLibraryRepository = new RpgWorldLibraryRepository(
    runtimeRepository,
  );
  const rpgRuntimeSnapshotRepository = new RpgRuntimeSnapshotRepository(
    runtimeRepository,
  );
  const userRepository = new UserRepository(db);
  const customWorldAgentSessions = new CustomWorldAgentSessionStore(
    rpgAgentSessionRepository,
  );
  const rpgWorldWorkSummaryService = new RpgWorldWorkSummaryService(
    rpgWorldProfileRepository,
    customWorldAgentSessions,
  );
  const autoAssetService = new CustomWorldAgentAutoAssetService(
    config,
    config.dashScope.apiKey.trim()
      ? CustomWorldAgentAutoAssetService.createDashScopeCharacterVisualGenerator(
          config,
        )
      : CustomWorldAgentAutoAssetService.createFallbackCharacterVisualGenerator(
          config,
        ),
    config.dashScope.apiKey.trim()
      ? CustomWorldAgentAutoAssetService.createDashScopeSceneActBackgroundGenerator(
          config,
        )
      : CustomWorldAgentAutoAssetService.createFallbackSceneActBackgroundGenerator(
          config,
        ),
  );
  const context: AppContext = {
    config,
    logger,
    db,
    userRepository,
    authIdentityRepository: new AuthIdentityRepository(db),
    authAuditLogRepository: new AuthAuditLogRepository(db),
    authRiskBlockRepository: new AuthRiskBlockRepository(db),
    smsAuthEventRepository: new SmsAuthEventRepository(db),
    userSessionRepository: new UserSessionRepository(db),
    rpgAgentSessionRepository,
    rpgWorldProfileRepository,
    rpgProfileDashboardRepository,
    rpgBrowseHistoryRepository,
    rpgSaveArchiveRepository,
    rpgWorldLibraryRepository,
    rpgRuntimeSnapshotRepository,
    runtimeRepository,
    llmClient: new UpstreamLlmClient(config, logger),
    customWorldAgentSessions,
    customWorldAgentOrchestrator: new CustomWorldAgentOrchestrator(
      customWorldAgentSessions,
      config.llm.apiKey.trim()
        ? new UpstreamLlmClient(config, logger)
        : null,
      {
        autoAssetService,
        rpgWorldProfileRepository,
        userRepository,
      },
    ),
    rpgWorldWorkSummaryService,
    smsVerificationService: createSmsVerificationService(config, logger),
    wechatAuthService: createWechatAuthService(config, logger),
    wechatAuthStates: new WechatAuthStateStore(),
    captchaChallenges: new CaptchaChallengeStore(),
  };

  return context;
}

async function main() {
  const context = await createAppContext();
  const app = createApp(context);
  const { host, port } = resolveListenTarget(context.config.serverAddr);
  const server = app.listen(port, host, () => {
    context.logger.info(
      {
        host,
        port,
        ...describeDatabase(context.config.databaseUrl),
      },
      'server-node started',
    );
  });

  let shuttingDown = false;
  const shutdown = () => {
    if (shuttingDown) {
      return;
    }
    shuttingDown = true;
    context.logger.info('server-node shutting down');
    server.close(() => {
      void context.db
        .close()
        .then(() => {
          process.exit(0);
        })
        .catch((error) => {
          context.logger.error({ err: error }, 'failed to close database');
          process.exit(1);
        });
    });
  };

  process.on('SIGINT', shutdown);
  process.on('SIGTERM', shutdown);
}

function isEntryModule() {
  if (typeof process.argv[1] !== 'string') {
    return false;
  }

  const entryHref = pathToFileURL(process.argv[1]).href;
  if (typeof import.meta.url === 'string' && import.meta.url === entryHref) {
    return true;
  }

  return (
    typeof __filename === 'string' &&
    pathToFileURL(__filename).href === entryHref
  );
}

const isEntryPoint = isEntryModule();

if (isEntryPoint) {
  void main().catch((error) => {
    console.error(error);
    process.exit(1);
  });
}