import express from 'express';
import pinoHttp from 'pino-http';

import type { AppContext } from './context.js';
import { notFound } from './errors.js';
import { buildApiLogContext, withRouteMeta } from './http.js';
import { errorHandler } from './middleware/errorHandler.js';
import { requestIdMiddleware } from './middleware/requestId.js';
import { responseEnvelopeMiddleware } from './middleware/responseEnvelope.js';
import { createCharacterAssetRoutes } from './modules/assets/characterAssetRoutes.js';
import { createEditorRoutes } from './modules/editor/editorRoutes.js';
import { createAuthRoutes } from './routes/authRoutes.js';
import { createBigFishProxyRoutes } from './routes/bigFishProxyRoutes.js';
import { createCustomWorldAgentRoutes } from './routes/customWorldAgent.js';
import { createPuzzleProxyRoutes } from './routes/puzzleProxyRoutes.js';
import { createRpgEntrySaveRoutes } from './routes/rpg-entry/rpgEntrySaveRoutes.js';
import { createRpgWorldLibraryRoutes } from './routes/rpg-entry/rpgWorldLibraryRoutes.js';
import { createRpgProfileRoutes } from './routes/rpg-profile/rpgProfileRoutes.js';
import { createRpgRuntimeAiAssistRoutes } from './routes/rpg-runtime/rpgRuntimeAiAssistRoutes.js';
import { createRpgRuntimeStoryRoutes } from './routes/rpg-runtime/rpgRuntimeStoryRoutes.js';

function matchesRoutePrefix(
  request: express.Request,
  prefixes: readonly string[],
) {
  const requestPath = request.path || request.originalUrl || request.url || '/';

  return prefixes.some((prefix) => {
    const normalizedPrefix = prefix.endsWith('/') ? prefix.slice(0, -1) : prefix;
    return (
      requestPath === normalizedPrefix ||
      requestPath.startsWith(`${normalizedPrefix}/`)
    );
  });
}

function scopeToPrefixes(
  prefixes: readonly string[],
  handler: express.RequestHandler,
): express.RequestHandler {
  return (request, response, next) => {
    if (!matchesRoutePrefix(request, prefixes)) {
      next();
      return;
    }

    handler(request, response, next);
  };
}

export function createApp(context: AppContext) {
  const app = express();
  const createHttpLogger = pinoHttp as unknown as (
    options: Record<string, unknown>,
  ) => express.RequestHandler;

  app.disable('x-powered-by');

  app.use(requestIdMiddleware);
  app.use(
    createHttpLogger({
      logger: context.logger,
      genReqId: (request: express.Request) => request.requestId,
      customSuccessObject: (
        request: express.Request,
        response: express.Response,
        baseObject: Record<string, unknown> & { responseTime?: number },
      ) => ({
        ...baseObject,
        ...buildApiLogContext(request, response),
        user_id: request.userId ?? null,
        method: request.method,
        path: request.url,
        status: response.statusCode,
        latency_ms: baseObject.responseTime,
      }),
      customErrorObject: (
        request: express.Request,
        response: express.Response,
        error: unknown,
        baseObject: Record<string, unknown> & { responseTime?: number },
      ) => ({
        ...baseObject,
        ...buildApiLogContext(request, response),
        user_id: request.userId ?? null,
        method: request.method,
        path: request.url,
        status: response.statusCode,
        latency_ms: baseObject.responseTime,
        err: error,
      }),
    }),
  );
  app.use(express.json({ limit: '10mb' }));
  app.use(responseEnvelopeMiddleware);

  app.get(
    '/healthz',
    withRouteMeta({ operation: 'health.check' }),
    (_request, response) => {
      response.json({
        ok: true,
        service: 'genarrative-node-server',
      });
    },
  );

  app.use(
    scopeToPrefixes(
      ['/api/editor'],
      withRouteMeta({ routeVersion: '2026-04-08', operation: 'editor.api' }),
    ),
  );
  app.use(scopeToPrefixes(['/api/editor'], createEditorRoutes(context.config)));
  app.use(
    scopeToPrefixes(
      ['/api/assets'],
      withRouteMeta({ routeVersion: '2026-04-08', operation: 'assets.api' }),
    ),
  );
  app.use(
    scopeToPrefixes(
      ['/api/assets'],
      createCharacterAssetRoutes(context.config, context.llmClient),
    ),
  );
  app.use(
    '/api',
    scopeToPrefixes(
      ['/runtime/profile', '/profile', '/runtime/settings'],
      withRouteMeta({ routeVersion: '2026-04-21', operation: 'rpg.profile.api' }),
    ),
    createRpgProfileRoutes(context),
  );
  app.use(
    '/api',
    scopeToPrefixes(
      ['/runtime/save', '/runtime/profile/save-archives', '/profile/save-archives'],
      withRouteMeta({ routeVersion: '2026-04-21', operation: 'rpg.entry.save.api' }),
    ),
    createRpgEntrySaveRoutes(context),
  );
  app.use(
    '/api',
    scopeToPrefixes(
      ['/runtime/custom-world-gallery', '/runtime/custom-world/works', '/runtime/custom-world-library'],
      withRouteMeta({
        routeVersion: '2026-04-21',
        operation: 'rpg.entry.worldLibrary.api',
      }),
    ),
    createRpgWorldLibraryRoutes(context),
  );
  app.use(
    '/api/auth',
    withRouteMeta({ routeVersion: '2026-04-08' }),
    createAuthRoutes(context),
  );
  app.use(
    '/api/runtime/story',
    withRouteMeta({ routeVersion: '2026-04-21' }),
    createRpgRuntimeStoryRoutes(context),
  );
  app.use(
    scopeToPrefixes(
      [
        '/llm/chat/completions',
        '/custom-world/cover-image',
        '/custom-world/cover-upload',
        '/custom-world/scene-image',
        '/custom-world/entity',
        '/custom-world/scene-npc',
        '/runtime/custom-world/entity',
        '/runtime/custom-world/scene-npc',
        '/runtime/custom-world/profile',
        '/runtime/story/initial',
        '/runtime/story/continue',
        '/runtime/chat',
        '/runtime/items',
        '/runtime/quests',
        '/ws/health',
      ],
      withRouteMeta({
        routeVersion: '2026-04-21',
        operation: 'rpg.runtime.aiAssist.api',
      }),
    ),
  );
  app.use(
    '/api',
    scopeToPrefixes(
      [
        '/llm/chat/completions',
        '/custom-world/cover-image',
        '/custom-world/cover-upload',
        '/custom-world/scene-image',
        '/custom-world/entity',
        '/custom-world/scene-npc',
        '/runtime/custom-world/entity',
        '/runtime/custom-world/scene-npc',
        '/runtime/custom-world/profile',
        '/runtime/story/initial',
        '/runtime/story/continue',
        '/runtime/chat',
        '/runtime/items',
        '/runtime/quests',
        '/ws/health',
      ],
      createRpgRuntimeAiAssistRoutes(context),
    ),
  );
  app.use(
    '/api/runtime/custom-world/agent',
    withRouteMeta({ routeVersion: '2026-04-21', operation: 'rpg.creation.agent.api' }),
    createCustomWorldAgentRoutes(context),
  );
  app.use(
    '/api/runtime/big-fish',
    withRouteMeta({ routeVersion: '2026-04-22', operation: 'bigFish.runtime.proxy.api' }),
    createBigFishProxyRoutes(context),
  );
  app.use(
    '/api/runtime/puzzle',
    withRouteMeta({ routeVersion: '2026-04-22', operation: 'puzzle.runtime.proxy.api' }),
    createPuzzleProxyRoutes(context),
  );
  app.use(
    express.static(context.config.publicDir, {
      fallthrough: true,
      index: false,
    }),
  );

  app.use((request, _response, next) => {
    next(notFound(`接口不存在：${request.method} ${request.originalUrl}`));
  });

  app.use(errorHandler);
  return app;
}