const assert = require("node:assert/strict");
const { createRequire } = require("node:module");

const nodeRequire = createRequire(__filename);

const routeModulePaths = [
  "../src/routes.js",
  "../src/routes/index.js",
  "../src/routes/community.js",
  "../src/routes/notifications.js",
];
const contextPath = "../src/routes/context.js";

function passThrough(_req, _res, next) {
  next();
}

function loadRouter(pool) {
  const contextResolvedPath = nodeRequire.resolve(contextPath);
  const originalContextModule = nodeRequire.cache[contextResolvedPath];
  const resolvedRouteModules = routeModulePaths.map((modulePath) => nodeRequire.resolve(modulePath));

  for (const resolvedPath of resolvedRouteModules) {
    delete nodeRequire.cache[resolvedPath];
  }

  nodeRequire.cache[contextResolvedPath] = {
    id: contextResolvedPath,
    filename: contextResolvedPath,
    loaded: true,
    exports: {
      express: nodeRequire("express"),
      requireAuth: passThrough,
      requireAdmin: passThrough,
      requireEnterpriseAdmin: passThrough,
      requireManagementAccess: passThrough,
      pool,
      withTransaction: async (fn) => fn(pool),
      clampPositiveInteger: (value, fallback) => Math.max(1, Number(value) || fallback),
      clampNonNegativeInteger: (value, fallback) => Math.max(0, Number(value) || fallback),
      normalizeProjectOssKey: (value) => String(value || "").trim(),
    },
  };

  return {
    router: nodeRequire("../src/routes.js"),
    restore() {
      for (const resolvedPath of resolvedRouteModules) {
        delete nodeRequire.cache[resolvedPath];
      }
      if (originalContextModule) {
        nodeRequire.cache[contextResolvedPath] = originalContextModule;
      } else {
        delete nodeRequire.cache[contextResolvedPath];
      }
    },
  };
}

function readRouterInventory(router) {
  return router.stack
    .filter((layer) => Boolean(layer.route))
    .flatMap((layer) =>
      Object.keys(layer.route.methods)
        .filter((method) => layer.route.methods[method])
        .map((method) => ({ method: method.toUpperCase(), path: layer.route.path })),
    );
}

function getRouteHandler(router, method, routePath) {
  const layer = router.stack.find(
    (candidate) => candidate.route?.path === routePath && candidate.route.methods[method.toLowerCase()],
  );
  const handler = layer?.route?.stack.at(-1)?.handle;
  if (!handler) throw new Error(`Route not found: ${method.toUpperCase()} ${routePath}`);
  return handler;
}

function createMockResponse() {
  const res = {};
  res.status = (statusCode) => {
    res.statusCode = statusCode;
    return res;
  };
  res.json = (body) => {
    res.body = body;
    return res;
  };
  return res;
}

async function testNotificationRoutesAreMounted() {
  const { router, restore } = loadRouter({ query: async () => ({ rows: [] }) });
  try {
    const inventory = readRouterInventory(router);
    assert(inventory.some((route) => route.method === "GET" && route.path === "/notifications"));
    assert(inventory.some((route) => route.method === "PATCH" && route.path === "/notifications/:id/read"));
    assert(inventory.some((route) => route.method === "POST" && route.path === "/notifications/read-all"));
  } finally {
    restore();
  }
}

async function testReviewStatusSurvivesNotificationWriteFailure() {
  const calls = [];
  const pool = {
    async query(sql, params) {
      calls.push({ sql, params });
      if (/UPDATE community_cases/.test(sql)) {
        return {
          rows: [
            {
              id: 2,
              user_id: 9,
              username: "creator",
              project_id: null,
              title: "待审核案例",
              description: "desc",
              cover_url: null,
              tags_json: "[]",
              metadata_json: "{}",
              status: "approved",
              review_note: null,
              reviewed_by: 1,
              reviewed_at: "2026-05-19T00:00:00.000Z",
              published_at: "2026-05-19T00:00:00.000Z",
              copy_count: 0,
              created_at: "2026-05-19T00:00:00.000Z",
              updated_at: "2026-05-19T00:00:00.000Z",
            },
          ],
        };
      }
      if (/INSERT INTO web_notifications/.test(sql)) {
        throw new Error("relation web_notifications does not exist");
      }
      if (/FROM community_case_assets/.test(sql)) return { rows: [] };
      if (/FROM community_case_reactions/.test(sql)) return { rows: [] };
      return { rows: [] };
    },
  };
  const { router, restore } = loadRouter(pool);
  try {
    const handler = getRouteHandler(router, "patch", "/admin/community/cases/:id/status");
    const res = createMockResponse();

    await handler(
      {
        params: { id: "2" },
        body: { status: "approved" },
        user: { id: 1, role: "admin" },
      },
      res,
    );

    assert.equal(res.statusCode, undefined);
    assert.equal(res.body.case.id, 2);
    assert.equal(res.body.case.status, "approved");
    const updateCall = calls.find((call) => /UPDATE community_cases/.test(call.sql));
    assert.match(updateCall.sql, /status = \$1::varchar\(24\)/);
    assert.match(updateCall.sql, /CASE WHEN \$1::varchar\(24\) = 'approved'/);
    assert(calls.some((call) => /INSERT INTO web_notifications/.test(call.sql)));
  } finally {
    restore();
  }
}

async function main() {
  await testNotificationRoutesAreMounted();
  await testReviewStatusSurvivesNotificationWriteFailure();
  console.log("community route contract tests passed");
}

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