import { chromium, request } from "playwright";
import fs from "node:fs";
import path from "node:path";
import { fileURLToPath } from "node:url";

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

const stamp = new Date().toISOString().replace(/[:.]/g, "-");
const runId = `p0-mainline-alignment-${Date.now()}`;
const webBase = process.env.P0_MAINLINE_WEB_URL || "http://localhost:3000";
const apiBase = process.env.P0_MAINLINE_API_URL || "http://127.0.0.1:8010/api/v1";
const healthUrl = process.env.P0_MAINLINE_HEALTH_URL || "http://127.0.0.1:8010/health";
const adminPassword = process.env.AI_CONTRACT_ADMIN_PASSWORD || "123456";
const artifactDir =
  process.env.P0_MAINLINE_ARTIFACT_DIR ||
  path.resolve(__dirname, "..", "..", "project-docs", "qa-artifacts", "p0-mainline-alignment-closed-loop", stamp);
const p0PlanDocPath = path.resolve(
  __dirname,
  "..",
  "..",
  "project-docs",
  "AI合同起草与审查助手-P0实现主线拆分方案-2026-05-11.md",
);

fs.mkdirSync(artifactDir, { recursive: true });

const results = [];
const state = {
  api: null,
  browser: null,
  contexts: [],
  admin: null,
};

function apiUrl(route) {
  return `${apiBase.replace(/\/$/, "")}${route}`;
}

function screenshotPath(name) {
  return path.join(artifactDir, `${name}.png`);
}

function assert(condition, message, details = undefined) {
  if (!condition) {
    const error = new Error(message);
    error.details = details;
    throw error;
  }
}

async function step(id, title, fn) {
  const startedAt = new Date().toISOString();
  const started = Date.now();
  try {
    const details = await fn();
    const item = { id, title, status: "PASS", duration_ms: Date.now() - started, started_at: startedAt, details: details || {} };
    results.push(item);
    console.log(`PASS ${id} ${title}`);
    return item;
  } catch (error) {
    const item = {
      id,
      title,
      status: "FAIL",
      duration_ms: Date.now() - started,
      started_at: startedAt,
      error: error.message,
      details: error.details || {},
    };
    results.push(item);
    console.error(`FAIL ${id} ${title}: ${error.message}`);
    return item;
  }
}

async function apiRequest(method, route, options = {}) {
  const headers = {
    ...(options.authToken ? { Authorization: `Bearer ${options.authToken}` } : {}),
    ...(options.headers || {}),
  };
  const response = await state.api[method](apiUrl(route), { ...options, headers });
  const text = await response.text();
  let body = null;
  if (text) {
    try {
      body = JSON.parse(text);
    } catch {
      body = text;
    }
  }
  return { response, body, text };
}

function expectOk(payload, label) {
  assert(payload.response.status() >= 200 && payload.response.status() < 300, `${label} HTTP ${payload.response.status()}`, {
    body: payload.body,
  });
  if (payload.body && typeof payload.body === "object" && "code" in payload.body) {
    assert(payload.body.code === 0, `${label} API code ${payload.body.code}`, { body: payload.body });
  }
}

function assertP0Mainline(payload, label) {
  assert(payload.version === "p0-mainline-alignment-2026-05-12", `${label} version mismatch`, payload);
  assert(payload.status === "aligned", `${label} status should be aligned`, payload);
  assert(payload.phase_boundary?.mainline_scope?.includes("Slice 1-8"), `${label} missing mainline scope`, payload.phase_boundary);
  assert(payload.phase_boundary?.next_stage_scope?.includes("Slice 9+"), `${label} missing next stage scope`, payload.phase_boundary);
  assert(Array.isArray(payload.capabilities) && payload.capabilities.length === 5, `${label} capability count mismatch`, payload.capabilities);
  assert(Array.isArray(payload.guardrails) && payload.guardrails.length >= 5, `${label} guardrail count mismatch`, payload.guardrails);
  assert(Array.isArray(payload.acceptance) && payload.acceptance.length >= 4, `${label} acceptance count mismatch`, payload.acceptance);
  for (const capability of payload.capabilities) {
    assert(capability.source_project, `${label} capability missing source project`, capability);
    assert(capability.target_layer, `${label} capability missing target layer`, capability);
    assert(capability.contract_platform_responsibility, `${label} capability missing contract responsibility`, capability);
    assert(capability.acceptance, `${label} capability missing acceptance`, capability);
    assert(Array.isArray(capability.evidence) && capability.evidence.length > 0, `${label} capability missing evidence`, capability);
  }
}

async function login(account, password) {
  const payload = await apiRequest("post", "/auth/login", { data: { account, password } });
  expectOk(payload, `login ${account}`);
  return payload.body.data;
}

async function attachApiProxy(context) {
  await context.route("**/api/v1/**", async (route) => {
    const browserRequest = route.request();
    const browserUrl = new URL(browserRequest.url());
    const targetUrl = apiUrl(browserUrl.pathname.replace(/^\/api\/v1/, "") + browserUrl.search);
    const headers = { ...browserRequest.headers() };
    delete headers.host;

    try {
      const response = await state.api.fetch(targetUrl, {
        method: browserRequest.method(),
        headers,
        data: browserRequest.postDataBuffer() ?? undefined,
      });
      await route.fulfill({ response });
    } catch {
      await route.abort("failed").catch(() => {});
    }
  });
}

async function createAuthenticatedContext(userSession) {
  const context = await state.browser.newContext({ viewport: { width: 1440, height: 1400 } });
  await context.addInitScript(
    ({ token, user }) => {
      window.localStorage.setItem("access_token", token);
      window.localStorage.setItem("auth-store", JSON.stringify({ state: { accessToken: token, currentUser: user }, version: 0 }));
    },
    { token: userSession.access_token, user: userSession.user },
  );
  await attachApiProxy(context);
  state.contexts.push(context);
  return context;
}

async function run() {
  state.api = await request.newContext();
  state.browser = await chromium.launch({ headless: true });

  await step("ENV-001", "frontend and backend health", async () => {
    const [frontend, health] = await Promise.all([state.api.get(`${webBase}/`), state.api.get(healthUrl)]);
    assert(frontend.status() === 200, `frontend / status ${frontend.status()}`);
    assert(health.status() === 200, `backend /health status ${health.status()}`);
    return { webBase, apiBase, healthUrl, artifactDir, runId };
  });

  await step("DOC-001", "P0 mainline plan document exists", async () => {
    assert(fs.existsSync(p0PlanDocPath), "missing P0 mainline plan doc", { p0PlanDocPath });
    const content = fs.readFileSync(p0PlanDocPath, "utf8");
    assert(content.includes("P0-A 文档解析"), "P0 plan missing document parsing lane", { p0PlanDocPath });
    assert(content.includes("P0-E 自动审查闭环"), "P0 plan missing auto review lane", { p0PlanDocPath });
    return { p0PlanDocPath };
  });

  await step("API-001", "p0 mainline API exposes source and ownership matrix", async () => {
    const payload = await apiRequest("get", "/system/p0-mainline");
    expectOk(payload, "p0 mainline");
    assertP0Mainline(payload.body.data, "p0 mainline API");
    return {
      version: payload.body.data.version,
      capability_count: payload.body.data.capabilities.length,
    };
  });

  await step("READINESS-001", "readiness embeds p0 mainline", async () => {
    const payload = await apiRequest("get", "/system/readiness");
    expectOk(payload, "readiness");
    assertP0Mainline(payload.body.data.p0_mainline, "readiness p0 mainline");
    return {
      readiness_status: payload.body.data.status,
      mainline_version: payload.body.data.p0_mainline.version,
    };
  });

  await step("AUTH-001", "default admin seed and login", async () => {
    const seed = await apiRequest("post", "/auth/seed-admin");
    expectOk(seed, "seed default admin");
    state.admin = await login("admin@example.com", adminPassword);
    assert(state.admin.user.role === "admin", "admin role mismatch", state.admin.user);
    return { user: state.admin.user.username, role: state.admin.user.role };
  });

  await step("BROWSER-001", "pilot readiness page exposes mainline alignment", async () => {
    const context = await createAuthenticatedContext(state.admin);
    const page = await context.newPage();
    await page.goto(`${webBase}/pilot-readiness`, { waitUntil: "domcontentloaded" });
    const panel = page.getByTestId("p0-mainline-alignment");
    await panel.waitFor({ state: "visible", timeout: 12000 });
    const capabilityCount = await panel.getByTestId("p0-mainline-capability").count();
    assert(capabilityCount === 5, "mainline alignment should expose five capabilities", { capabilityCount });
    await page.getByTestId("p0-mainline-boundary").waitFor({ state: "visible", timeout: 12000 });
    await page.getByTestId("p0-mainline-guardrails").waitFor({ state: "visible", timeout: 12000 });
    await page.getByTestId("p0-mainline-acceptance").waitFor({ state: "visible", timeout: 12000 });
    await page.screenshot({ path: screenshotPath("p0-mainline-alignment"), fullPage: true });
    return { screenshot: "p0-mainline-alignment.png", capability_count: capabilityCount };
  });
}

try {
  await run();
} finally {
  for (const context of state.contexts) {
    await context.close().catch(() => {});
  }
  if (state.browser) {
    await state.browser.close().catch(() => {});
  }
  if (state.api) {
    await state.api.dispose().catch(() => {});
  }
  const summary = {
    run_id: runId,
    artifact_dir: artifactDir,
    passed: results.filter((item) => item.status === "PASS").length,
    failed: results.filter((item) => item.status === "FAIL").length,
    results,
  };
  fs.writeFileSync(path.join(artifactDir, "summary.json"), `${JSON.stringify(summary, null, 2)}\n`, "utf8");
  console.log(`Wrote ${path.join(artifactDir, "summary.json")}`);
  if (summary.failed > 0) {
    process.exitCode = 1;
  }
}