import assert from "node:assert/strict";
import { spawnSync } from "node:child_process";
import { readdirSync, readFileSync, statSync } from "node:fs";
import { join } from "node:path";
import { fileURLToPath } from "node:url";
import test from "node:test";

const frontendRoot = fileURLToPath(new URL("../", import.meta.url));
const srcRoot = join(frontendRoot, "src");

const NOT_CONFIGURED = "服务尚未配置";

const ROUTES_USING_HELPER = [
  "src/app/api/rectification/agent/route.ts",
  "src/app/api/rectification/cases/open/route.ts",
  "src/app/api/rectification/cases/entry-summary/route.ts",
  "src/app/api/rectification/cases/[caseId]/route.ts",
  "src/app/api/rectification/cases/[caseId]/close/route.ts",
  "src/app/api/rectification/cases/[caseId]/adopt-skill/route.ts",
  "src/app/api/rectification/cases/[caseId]/upgrade-skill/route.ts",
  "src/app/api/rectification/cases/[caseId]/candidates/accept/route.ts",
  "src/app/api/rectification/cases/[caseId]/turns/[turnId]/regenerate/route.ts",
  "src/app/api/consult/route.ts",
  "src/app/api/consult/status/route.ts",
  "src/app/api/consult/cancel/route.ts",
  "src/app/api/models/route.ts",
  "src/app/api/birth-time-journey/route.ts",
  "src/app/api/birth-time-guide/route.ts",
] as const;

function walk(directory: string): string[] {
  const files: string[] = [];
  for (const name of readdirSync(directory)) {
    const path = join(directory, name);
    if (statSync(path).isDirectory()) {
      files.push(...walk(path));
      continue;
    }
    if (path.endsWith(".ts") || path.endsWith(".tsx")) files.push(path);
  }
  return files;
}

type RouteProbe = {
  configStatus: number;
  configBody: Record<string, unknown>;
  unavailableStatus: number;
  unavailableBody: Record<string, unknown>;
  unavailableLogs: string[][];
};

function executeRouteProbe(kind: "agent" | "cases"): RouteProbe {
  const script = String.raw`
    import { mock } from "node:test";
    import { pathToFileURL } from "node:url";
    import { SupabaseConfigurationError } from "@/lib/supabase/config";

    const kind = ${JSON.stringify(kind)};
    const moduleUrl = (path) => pathToFileURL(process.cwd() + "/" + path).href;
    mock.module("server-only", { namedExports: {} });

    let calls = 0;
    mock.module("@/lib/supabase/server", { namedExports: {
      createServerSupabaseClient: async () => {
        calls += 1;
        if (calls === 1) throw new SupabaseConfigurationError(["APP_DATABASE_URL"]);
        throw new Error("connection refused");
      },
    }});
    mock.module("@/lib/supabase/admin", { namedExports: {
      createAdminSupabaseClient: () => { throw new Error("admin unused in this unit test"); },
    }});

    const unavailableLogs = [];
    const originalError = console.error;
    console.error = (...args) => {
      unavailableLogs.push(args.map((value) => {
        if (typeof value === "string") return value;
        if (value instanceof Error) return value.stack ?? value.message;
        return String(value);
      }));
    };

    async function invoke() {
      if (kind === "agent") {
        const { POST } = await import(moduleUrl("src/app/api/rectification/agent/route.ts"));
        return POST(new Request("https://staging.jyotisha.chat/api/rectification/agent", {
          method: "POST",
          headers: { "content-type": "application/json" },
          body: "{}",
        }));
      }
      const { GET } = await import(moduleUrl("src/app/api/rectification/cases/[caseId]/route.ts"));
      return GET(
        new Request("https://staging.jyotisha.chat/api/rectification/cases/123e4567-e89b-12d3-a456-426614174000?sessionId=123e4567-e89b-12d3-a456-426614174001"),
        { params: Promise.resolve({ caseId: "123e4567-e89b-12d3-a456-426614174000" }) },
      );
    }

    const configResponse = await invoke();
    const configBody = await configResponse.json();
    const unavailableResponse = await invoke();
    const unavailableBody = await unavailableResponse.json();
    console.error = originalError;
    console.log("AYANAM_RESULT " + JSON.stringify({
      configStatus: configResponse.status,
      configBody,
      unavailableStatus: unavailableResponse.status,
      unavailableBody,
      unavailableLogs,
    }));
  `;
  const result = spawnSync(process.execPath, [
    "--experimental-test-module-mocks",
    "--import",
    "tsx",
    "--input-type=module",
    "--eval",
    script,
  ], {
    cwd: frontendRoot,
    encoding: "utf8",
    env: { ...process.env, NODE_NO_WARNINGS: "1" },
  });
  assert.equal(result.status, 0, result.stderr || result.stdout);
  const line = result.stdout
    .split("\n")
    .map((row) => row.trim())
    .find((row) => row.startsWith("AYANAM_RESULT "));
  assert.ok(line, result.stdout);
  return JSON.parse(line.slice("AYANAM_RESULT ".length)) as RouteProbe;
}

function assertConfigMislabel(body: Record<string, unknown>) {
  assert.equal(body.error, NOT_CONFIGURED);
  assert.equal(body.code, undefined);
}

function assertUnavailable(body: Record<string, unknown>, logs: string[][]) {
  assert.equal(body.error, "服务暂时不可用，请稍后重试");
  assert.equal(body.code, "service_unavailable");
  assert.equal(JSON.stringify(body).includes("尚未配置"), false);
  assert.ok(logs.some((entry) => entry.includes("Error")));
  assert.equal(JSON.stringify(logs).includes("connection refused"), false);
  assert.equal(JSON.stringify(logs).includes("APP_DATABASE_URL"), false);
}

test("shared helper classifies configuration errors and connection failures", async () => {
  const { jsonForSupabaseSetupFailure } = await import("../src/lib/api/service-unavailable.ts");
  const { SupabaseConfigurationError } = await import("../src/lib/supabase/config.ts");
  const logged: unknown[][] = [];
  const originalError = console.error;
  console.error = (...args: unknown[]) => {
    logged.push(args);
  };
  try {
    const missing = await jsonForSupabaseSetupFailure(
      new SupabaseConfigurationError(["APP_DATABASE_URL"]),
      "POST /api/rectification/agent",
    );
    assert.equal(missing.status, 503);
    assert.deepEqual(await missing.json(), {
      error: NOT_CONFIGURED,
      message: "请先配置数据库环境变量。",
    });
    assert.deepEqual(logged, []);

    const unavailable = await jsonForSupabaseSetupFailure(
      new Error("connection refused"),
      "GET /api/rectification/cases/[caseId]",
    );
    assert.equal(unavailable.status, 503);
    assert.deepEqual(await unavailable.json(), {
      error: "服务暂时不可用，请稍后重试",
      code: "service_unavailable",
    });
    assert.deepEqual(logged, [["GET /api/rectification/cases/[caseId]", "Error"]]);
  } finally {
    console.error = originalError;
  }
});

test("rectification agent maps setup failures without calling the rest of the handler", () => {
  const probe = executeRouteProbe("agent");
  assert.equal(probe.configStatus, 503);
  assertConfigMislabel(probe.configBody);
  assert.equal(probe.unavailableStatus, 503);
  assertUnavailable(probe.unavailableBody, probe.unavailableLogs);
  assert.ok(probe.unavailableLogs.some((entry) =>
    entry.some((value) => value.includes("/api/rectification/agent")),
  ));
});

test("rectification case refresh maps setup failures without calling the rest of the handler", () => {
  const probe = executeRouteProbe("cases");
  assert.equal(probe.configStatus, 503);
  assertConfigMislabel(probe.configBody);
  assert.equal(probe.unavailableStatus, 503);
  assertUnavailable(probe.unavailableBody, probe.unavailableLogs);
  assert.ok(probe.unavailableLogs.some((entry) =>
    entry.some((value) => value.includes("/api/rectification/cases/")),
  ));
});

test("not-configured copy lives only in the shared helper, and the listed routes call it", () => {
  // 原值: 测试名写 16 条，清单含 src/lib/onboarding-post.ts。
  // 新值: 15 条，建议问题接口删除。
  // 原因: /api/onboarding 下线。
  const hits = walk(srcRoot)
    .filter((path) => readFileSync(path, "utf8").includes(NOT_CONFIGURED))
    .map((path) => path.slice(srcRoot.length + 1).split("\\").join("/"));
  assert.deepEqual(hits, ["lib/api/service-unavailable.ts"]);
  for (const relative of ROUTES_USING_HELPER) {
    const source = readFileSync(join(frontendRoot, relative), "utf8");
    assert.match(
      source,
      /jsonForSupabaseSetupFailure/,
      `${relative} must use jsonForSupabaseSetupFailure`,
    );
  }
});