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 = `phase3-auto-${Date.now()}`;
const webBase = process.env.PHASE3_WEB_URL || "http://127.0.0.1:3006";
const apiBase = process.env.PHASE3_API_URL || "http://127.0.0.1:8000/api/v1";
const healthUrl = process.env.PHASE3_HEALTH_URL || "http://127.0.0.1:8000/health";
const readinessUrl = process.env.PHASE3_READINESS_URL || "http://127.0.0.1:8000/api/v1/system/readiness";
const adminPassword = process.env.AI_CONTRACT_ADMIN_PASSWORD || "123456";
const shouldSeedAdmin = process.env.PHASE3_SEED_ADMIN !== "false";
const artifactDir =
  process.env.PHASE3_ARTIFACT_DIR ||
  path.resolve(__dirname, "..", "..", "..", "project-docs", "qa-artifacts", "phase3-closed-loop", stamp);

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

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

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 createAuthenticatedContext(userSession) {
  const context = await state.browser.newContext({
    viewport: { width: 1440, height: 1100 },
    acceptDownloads: true,
  });
  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 },
  );
  state.contexts.push(context);
  return context;
}

async function createPilotReview() {
  const text = [
    `${runId} 阶段3试点演示审查样本。`,
    "合同包含自动续约、免责、付款条件另行协商和50%违约金。",
    "请用于演示审查详情、问答追问、合同生成和审计留痕。",
  ].join("\n");
  const create = await apiRequest("post", "/reviews", {
    authToken: state.admin.access_token,
    multipart: { text, review_as: "party_a", contract_type: "procurement" },
  });
  expectOk(create, "create pilot review");
  state.reviewId = create.body.data.id;
  return create.body.data;
}

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

  await step("ENV-001", "frontend health and system readiness", async () => {
    const frontend = await state.api.get(`${webBase}/login`);
    const health = await state.api.get(healthUrl);
    const readiness = await state.api.get(readinessUrl);
    assert(frontend.status() === 200, `frontend /login status ${frontend.status()}`);
    assert(health.status() === 200, `backend /health status ${health.status()}`);
    assert(readiness.status() === 200, `system readiness status ${readiness.status()}`);
    const readinessBody = await readiness.json();
    assert(readinessBody.code === 0, "readiness API code mismatch", readinessBody);
    assert(readinessBody.data.summary.failed_required === 0, "readiness has failed required checks", readinessBody.data);
    assert(readinessBody.data.pilot_assets.default_admin.username === "admin@example.com", "default admin readiness mismatch", readinessBody.data);
    return {
      webBase,
      apiBase,
      healthUrl,
      readinessUrl,
      artifactDir,
      readiness_status: readinessBody.data.status,
      warnings: readinessBody.data.summary.warnings,
    };
  });

  await step("AUTH-001", "admin login", async () => {
    let seed = null;
    if (shouldSeedAdmin) {
      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 {
      seed_admin: shouldSeedAdmin,
      seed_created: seed?.body?.data?.created ?? null,
      user: state.admin.user.username,
      role: state.admin.user.role,
    };
  });

  await step("PILOT-DATA-001", "pilot sample data can be prepared", async () => {
    const templateSeed = await apiRequest("post", "/templates/seed-defaults", {
      authToken: state.admin.access_token,
    });
    expectOk(templateSeed, "seed default templates");

    const review = await createPilotReview();
    const reviewDetail = await apiRequest("get", `/reviews/${review.id}`, {
      authToken: state.admin.access_token,
    });
    const reviewResult = await apiRequest("get", `/reviews/${review.id}/result`, {
      authToken: state.admin.access_token,
    });
    expectOk(reviewDetail, "pilot review detail");
    expectOk(reviewResult, "pilot review result");
    assert(reviewDetail.body.data.current_stage === "report", "pilot review should reach report stage", reviewDetail.body.data);
    assert(reviewResult.body.data.risk_summary.overall === "high", "pilot review should be high risk", reviewResult.body.data);

    const createKb = await apiRequest("post", "/knowledge-bases", {
      authToken: state.admin.access_token,
      multipart: { name: `${runId} 试点知识库`, description: "阶段3试点样本知识库" },
    });
    expectOk(createKb, "create pilot knowledge base");
    state.knowledgeBaseId = createKb.body.data.id;

    const uploadDoc = await apiRequest("post", `/knowledge-bases/${state.knowledgeBaseId}/documents`, {
      authToken: state.admin.access_token,
      multipart: {
        file: {
          name: `${runId}-pilot-kb.txt`,
          mimeType: "text/plain",
          buffer: Buffer.from("阶段3试点知识库样本：付款、验收、违约责任、保密和自动续约。", "utf8"),
        },
      },
    });
    expectOk(uploadDoc, "upload pilot knowledge document");
    assert(uploadDoc.body.data.status === "indexed", "pilot knowledge document should be indexed", uploadDoc.body.data);

    const audits = await apiRequest("get", "/audit-logs?page=1&page_size=20&keyword=phase3-auto", {
      authToken: state.admin.access_token,
    });
    expectOk(audits, "audit logs reachable");
    return {
      templates_total: templateSeed.body.data.total,
      review_id: state.reviewId,
      review_stage: reviewDetail.body.data.current_stage,
      review_risk: reviewResult.body.data.risk_summary.overall,
      kb_id: state.knowledgeBaseId,
      document_status: uploadDoc.body.data.status,
      audit_total: audits.body.data.total,
    };
  });

  await step("BROWSER-PILOT-001", "pilot readiness page exposes delivery gates", async () => {
    const context = await createAuthenticatedContext(state.admin);
    const page = await context.newPage();
    await page.goto(`${webBase}/pilot-readiness`, { waitUntil: "domcontentloaded" });
    await page.waitForTimeout(1800);
    await page.screenshot({ path: screenshotPath("pilot-readiness-dashboard"), fullPage: true });
    const body = await page.locator("body").innerText();
    assert(body.includes("试点交付准备"), "pilot readiness title missing", body.slice(0, 1200));
    assert(body.includes("阶段 3 验收门禁"), "phase 3 gate missing", body.slice(0, 1200));
    assert(body.includes("admin@example.com"), "default admin account missing", body.slice(0, 1800));
    assert(body.includes("密码状态"), "password rotation status missing", body.slice(0, 1800));
    assert(body.includes("演示链路"), "demo flow missing", body.slice(0, 2200));
    return { screenshot: "pilot-readiness-dashboard.png" };
  });

  await step("BROWSER-HOME-001", "home and navigation expose pilot delivery entry", async () => {
    const context = await createAuthenticatedContext(state.admin);
    const page = await context.newPage();
    await page.goto(`${webBase}/`, { waitUntil: "domcontentloaded" });
    await page.waitForTimeout(1600);
    await page.screenshot({ path: screenshotPath("home-pilot-delivery-entry"), fullPage: true });
    const body = await page.locator("body").innerText();
    assert(body.includes("试点交付"), "top navigation pilot entry missing", body.slice(0, 1400));
    assert(body.includes("试点交付准备"), "home pilot delivery card missing", body.slice(0, 2600));
    await page.locator('nav a[href="/pilot-readiness"]').click();
    await page.waitForURL(/\/pilot-readiness/);
    return { screenshot: "home-pilot-delivery-entry.png", target_url: page.url() };
  });
}

async function finalize() {
  for (const context of state.contexts) {
    await context.close().catch(() => undefined);
  }
  if (state.browser) {
    await state.browser.close().catch(() => undefined);
  }
  if (state.api) {
    await state.api.dispose().catch(() => undefined);
  }

  const summary = {
    run_id: runId,
    web_base: webBase,
    api_base: apiBase,
    health_url: healthUrl,
    readiness_url: readinessUrl,
    artifact_dir: artifactDir,
    total: results.length,
    passed: results.filter((item) => item.status === "PASS").length,
    failed: results.filter((item) => item.status === "FAIL").length,
    results,
  };
  fs.writeFileSync(path.join(artifactDir, "phase3-closed-loop-summary.json"), JSON.stringify(summary, null, 2), "utf8");
  const markdown = [
    "# Phase 3 Closed Loop E2E",
    "",
    `- Run ID: \`${runId}\``,
    `- Web: \`${webBase}\``,
    `- API: \`${apiBase}\``,
    `- Readiness: \`${readinessUrl}\``,
    `- Passed: ${summary.passed}/${summary.total}`,
    "",
    "| ID | Status | Title | Duration |",
    "|---|---|---|---:|",
    ...results.map((item) => `| ${item.id} | ${item.status} | ${item.title.replace(/\|/g, "/")} | ${item.duration_ms}ms |`),
    "",
  ].join("\n");
  fs.writeFileSync(path.join(artifactDir, "phase3-closed-loop-summary.md"), markdown, "utf8");
  console.log(JSON.stringify(summary, null, 2));
  if (summary.failed > 0) {
    process.exitCode = 1;
  }
}

run()
  .catch((error) => {
    results.push({
      id: "RUNNER",
      title: "unhandled runner error",
      status: "FAIL",
      duration_ms: 0,
      started_at: new Date().toISOString(),
      error: error.message,
    });
    process.exitCode = 1;
  })
  .finally(finalize);