import { mkdirSync, writeFileSync } from "node:fs";
import path from "node:path";
import { createRequire } from "node:module";
import { expect, test, type Browser, type Page } from "@playwright/test";

import {
  EMPLOYEE,
  MANAGER,
  createAuthenticatedApiClient,
  apiGetData,
  apiPostData,
  type AuthenticatedApiClient,
  type E2EUser,
} from "./helpers/auth";
import { waitForWorkflowTask } from "./helpers/workflow";

type Finding = {
  severity: "P1" | "P2";
  page: string;
  category: string;
  title: string;
  detail: string;
  evidence?: string;
};

type CheckRecord = Record<string, unknown>;

type MobileAuditOptions = {
  label: string;
  route: string;
  screenshotName: string;
  skipNavigation?: boolean;
};

type MobileMetrics = {
  text: string;
  width: number;
  height: number;
  scrollWidth: number;
  visibleTables: Array<Record<string, unknown>>;
  bannedFound: string[];
  darkSurfaces: Array<Record<string, unknown>>;
  clipped: Array<Record<string, unknown>>;
  bottomOverlap: Array<Record<string, unknown>>;
  moreMenuRatio: number | null;
};

const ROOT_DIR = path.resolve(process.cwd(), "..");
const RUN_DIR = process.env.QA_VISUAL_OUTPUT_DIR
  ? path.resolve(process.env.QA_VISUAL_OUTPUT_DIR, "r108")
  : path.join(ROOT_DIR, "artifacts/qa-layout/r108-runs", `${Date.now()}-${process.pid}`);
const SCREENSHOT_DIR = path.join(RUN_DIR, "screenshots");
const ARTIFACT_DIR = path.join(RUN_DIR, "reports");
const requireServer = createRequire(new URL("../../../server/package.json", import.meta.url));
const WECOM_UA =
  "Mozilla/5.0 (iPhone; CPU iPhone OS 17_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 wxwork/4.1.20 MicroMessenger/8.0.1 Language/zh_CN";
const UUID_RE = /[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}/gi;

const findings: Finding[] = [];
const checks: CheckRecord[] = [];

function screenshotPath(fileName: string) {
  mkdirSync(SCREENSHOT_DIR, { recursive: true });
  return path.join(SCREENSHOT_DIR, `${fileName}.png`);
}

function artifactPath(fileName: string) {
  mkdirSync(ARTIFACT_DIR, { recursive: true });
  return path.join(ARTIFACT_DIR, fileName);
}

function redact(value: string) {
  return value.replaceAll(ROOT_DIR, "<worktree>").replace(UUID_RE, "[uuid]");
}

function addFinding(finding: Finding) {
  findings.push({
    ...finding,
    detail: redact(finding.detail),
  });
}

async function loginForMobile(page: Page, user: E2EUser) {
  await page.goto("/login");
  await expect(page.getByTestId("login-identifier")).toBeVisible();
  await page.getByTestId("login-identifier").fill(user.identifier);
  await page.getByTestId("login-password").fill(user.password);
  await page.getByTestId("login-submit").click();
  await page.waitForURL(/\/(portal|mobile)/, { timeout: 30_000 });
  await page.waitForLoadState("networkidle").catch(() => undefined);
}

async function newWecomPage(browser: Browser, viewport: { width: number; height: number }) {
  const context = await browser.newContext({
    viewport,
    isMobile: true,
    hasTouch: true,
    userAgent: WECOM_UA,
    locale: "zh-CN",
    serviceWorkers: "block",
  });
  return { context, page: await context.newPage() };
}

async function syntheticPdf(label: string) {
  const document = await requireServer("pdf-lib").PDFDocument.create();
  document.addPage().drawText(`Synthetic R108 ${label} ${Date.now()}`, { x: 40, y: 700 });
  return Buffer.from(await document.save());
}

async function seedEmployeeMobileData() {
  const client = await createAuthenticatedApiClient(EMPLOYEE);
  try {
    const expenseDate = new Intl.DateTimeFormat("en-CA", { timeZone: "Asia/Shanghai", year: "numeric", month: "2-digit", day: "2-digit" }).format(new Date());
    const types = await apiGetData<{ items: Array<{ id: string; code: string; enabled: boolean }> }>(client.api, "/api/expense-types?enabled=true");
    const expenseType = types.items.find(item => item.enabled && item.code === "office_postal");
    expect(expenseType, "R108 requires the active synthetic postal expense type").toBeDefined();
    const reimbursement = await apiPostData<{ id: string }>(client.api, "/api/reimbursements", {
      description: "R108 移动审批合成报销", reimbursementDate: expenseDate,
    });
    const item = await apiPostData<{ id: string }>(client.api, `/api/reimbursements/${reimbursement.id}/items`, {
      expenseTypeId: expenseType!.id, expenseDate, amount: "10.00", description: "R108 合成邮寄费",
    });
    const uploaded = await client.api.post("/api/invoice-pool/upload", {
      multipart: { file: { name: "r108-approval.pdf", mimeType: "application/pdf", buffer: await syntheticPdf("approval") }, ocr_type: "general" },
    });
    expect(uploaded.ok(), `R108 upload HTTP ${uploaded.status()}`).toBe(true);
    const invoice = await uploaded.json() as { data: { invoicePoolId: string } };
    await expect.poll(async () => (await apiGetData<{ status: string }>(client.api, `/api/invoice-pool/${invoice.data.invoicePoolId}`)).status, { timeout: 90_000 }).toBe("available");
    await apiPostData(client.api, `/api/invoice-pool/${invoice.data.invoicePoolId}/bind`, { reimbursementId: reimbursement.id, linkedItemId: item.id });
    const submitted = await apiPostData<{ reimbursementId: string; formNumber: string; currentTaskId: string }>(client.api, `/api/reimbursements/${reimbursement.id}/submit`, {});
    const denied = await client.api.post(`/api/workflow/tasks/${submitted.currentTaskId}/approve`, { data: {} });
    expect(denied.status(), "员工不可审批分配给经理的任务").toBe(403);
    return submitted;
  } finally {
    await client.dispose();
  }
}

async function auditMobilePage(page: Page, options: MobileAuditOptions): Promise<MobileMetrics> {
  if (!options.skipNavigation) {
    await page.goto(options.route);
    await page.waitForLoadState("networkidle").catch(() => undefined);
  }
  await page.waitForTimeout(500);

  const shot = screenshotPath(options.screenshotName);
  await page.screenshot({ path: shot, fullPage: true });

  const metrics = await page.evaluate(() => {
    function parseRgb(value: string) {
      const match = value.match(/rgba?\((\d+),\s*(\d+),\s*(\d+)(?:,\s*([0-9.]+))?\)/i);
      if (!match) return null;
      return {
        r: Number(match[1]),
        g: Number(match[2]),
        b: Number(match[3]),
        a: match[4] == null ? 1 : Number(match[4]),
      };
    }

    function isVisible(element: Element) {
      const rect = element.getBoundingClientRect();
      const style = getComputedStyle(element);
      return rect.width > 0 && rect.height > 0 && style.visibility !== "hidden" && style.display !== "none";
    }

    const text = document.body?.innerText ?? "";
    const documentElement = document.documentElement;
    const width = window.innerWidth;
    const height = window.innerHeight;
    const scrollWidth = Math.max(documentElement.scrollWidth, document.body?.scrollWidth ?? 0);
    const visibleTables = Array.from(document.querySelectorAll("table"))
      .filter(isVisible)
      .map((element) => {
        const rect = element.getBoundingClientRect();
        return {
          testid: element.getAttribute("data-testid") ?? "",
          width: Math.round(rect.width),
          height: Math.round(rect.height),
        };
      });
    const bannedTerms = ["先处理", "清爽", "低频模块放在这里", "Choose File", "/invoice-pool", "/purchase-requests"];
    const bannedFound = bannedTerms.filter((term) => text.includes(term));

    const darkSurfaces: Array<Record<string, unknown>> = [];
    for (const element of Array.from(document.querySelectorAll("body *"))) {
      if (!isVisible(element)) continue;
      const style = getComputedStyle(element);
      const rgb = parseRgb(style.backgroundColor);
      if (!rgb || rgb.a < 0.2) continue;
      const average = (rgb.r + rgb.g + rgb.b) / 3;
      const rect = element.getBoundingClientRect();
      const area = rect.width * rect.height;
      if (average < 36 && area > 2200) {
        darkSurfaces.push({
          tag: element.tagName.toLowerCase(),
          testid: element.getAttribute("data-testid") ?? "",
          text: (element.textContent ?? "").trim().slice(0, 40),
          backgroundColor: style.backgroundColor,
          area: Math.round(area),
        });
      }
    }

    const clipped: Array<Record<string, unknown>> = [];
    for (const element of Array.from(document.querySelectorAll("button,a,[role='button'],select,input,textarea,[data-testid]"))) {
      if (!isVisible(element)) continue;
      if (element.classList.contains("sr-only")) continue;
      const style = getComputedStyle(element);
      const overflowHidden = ["hidden", "clip"].includes(style.overflowX) || ["hidden", "clip"].includes(style.overflowY);
      const isClipped = element.scrollWidth > element.clientWidth + 2 || element.scrollHeight > element.clientHeight + 2;
      if (isClipped && overflowHidden) {
        clipped.push({
          tag: element.tagName.toLowerCase(),
          testid: element.getAttribute("data-testid") ?? "",
          text: (element.textContent ?? element.getAttribute("aria-label") ?? element.getAttribute("placeholder") ?? "").trim().slice(0, 60),
          client: `${element.clientWidth}x${element.clientHeight}`,
          scroll: `${element.scrollWidth}x${element.scrollHeight}`,
        });
      }
    }

    const nav = document.querySelector("[data-testid='mobile-nav-home']")?.closest("nav");
    const navRect = nav?.getBoundingClientRect() ?? null;
    const bottomOverlap: Array<Record<string, unknown>> = [];
    function canScrollDownFrom(element: Element) {
      let current = element.parentElement;
      while (current && current !== document.body) {
        const style = getComputedStyle(current);
        const canScroll = /(auto|scroll)/.test(style.overflowY) && current.scrollHeight > current.clientHeight + 4;
        if (canScroll) {
          return current.scrollTop < current.scrollHeight - current.clientHeight - 4;
        }
        current = current.parentElement;
      }

      const root = document.scrollingElement ?? document.documentElement;
      return root.scrollTop < root.scrollHeight - root.clientHeight - 4;
    }

    if (navRect) {
      for (const element of Array.from(document.querySelectorAll("main button, main a, main input, main select, main textarea, main [role='button']"))) {
        if (!isVisible(element) || nav?.contains(element)) continue;
        const rect = element.getBoundingClientRect();
        const area = rect.width * rect.height;
        if (area > 300 && rect.bottom > navRect.top + 4 && rect.top < navRect.bottom - 4 && !canScrollDownFrom(element)) {
          bottomOverlap.push({
            tag: element.tagName.toLowerCase(),
            testid: element.getAttribute("data-testid") ?? "",
            text: (element.textContent ?? element.getAttribute("aria-label") ?? "").trim().slice(0, 40),
            rect: `${Math.round(rect.left)},${Math.round(rect.top)},${Math.round(rect.width)}x${Math.round(rect.height)}`,
          });
        }
      }
    }

    const moreLinks = document.querySelector("[data-testid='mobile-more-links']");
    const moreRect = moreLinks?.getBoundingClientRect() ?? null;
    const moreMenuRatio = moreRect ? moreRect.height / window.innerHeight : null;

    return {
      text,
      width,
      height,
      scrollWidth,
      visibleTables,
      bannedFound,
      darkSurfaces: darkSurfaces.slice(0, 8),
      clipped: clipped.slice(0, 12),
      bottomOverlap: bottomOverlap.slice(0, 8),
      moreMenuRatio,
    };
  });

  const uuids = Array.from(new Set(metrics.text.match(UUID_RE) ?? [])).slice(0, 8);
  checks.push({
    label: options.label,
    route: options.route,
    screenshot: shot,
    width: metrics.width,
    height: metrics.height,
    scrollWidth: metrics.scrollWidth,
    visibleTableCount: metrics.visibleTables.length,
    uuidCount: uuids.length,
  });

  if (metrics.scrollWidth > metrics.width + 2) {
    addFinding({
      severity: "P1",
      page: options.label,
      category: "响应式",
      title: "手机页面存在横向溢出",
      detail: `viewport=${metrics.width}px, scrollWidth=${metrics.scrollWidth}px`,
      evidence: shot,
    });
  }
  if (metrics.visibleTables.length > 0) {
    addFinding({
      severity: "P1",
      page: options.label,
      category: "移动端",
      title: "手机视口仍出现桌面表格",
      detail: JSON.stringify(metrics.visibleTables),
      evidence: shot,
    });
  }
  if (metrics.bannedFound.length > 0) {
    addFinding({
      severity: "P1",
      page: options.label,
      category: "文案",
      title: "出现移动端禁用文案",
      detail: metrics.bannedFound.join("、"),
      evidence: shot,
    });
  }
  if (uuids.length > 0) {
    addFinding({
      severity: "P1",
      page: options.label,
      category: "业务展示",
      title: "手机页面向用户暴露内部 UUID",
      detail: `${uuids.length} 个 UUID`,
      evidence: shot,
    });
  }
  if (metrics.darkSurfaces.length > 0) {
    addFinding({
      severity: "P2",
      page: options.label,
      category: "视觉",
      title: "手机页面存在大块近黑背景",
      detail: JSON.stringify(metrics.darkSurfaces.slice(0, 3)),
      evidence: shot,
    });
  }
  if (metrics.clipped.length > 0) {
    addFinding({
      severity: "P2",
      page: options.label,
      category: "视觉",
      title: "存在疑似文字/控件裁切",
      detail: JSON.stringify(metrics.clipped.slice(0, 5)),
      evidence: shot,
    });
  }
  if (metrics.bottomOverlap.length > 0) {
    addFinding({
      severity: "P2",
      page: options.label,
      category: "移动导航",
      title: "底部导航疑似遮挡主操作",
      detail: JSON.stringify(metrics.bottomOverlap.slice(0, 4)),
      evidence: shot,
    });
  }
  if (metrics.moreMenuRatio != null && metrics.moreMenuRatio > 0.6) {
    addFinding({
      severity: "P2",
      page: options.label,
      category: "移动菜单",
      title: "更多菜单占用过多首屏空间",
      detail: `ratio=${metrics.moreMenuRatio.toFixed(2)}`,
      evidence: shot,
    });
  }

  return metrics;
}

function writeReport(completed: boolean) {
  const generatedAt = new Date().toISOString();
  const report = { generatedAt, status: completed && findings.length === 0 ? "PASS" : "INCOMPLETE_OR_FAILED", checks, findings };
  writeFileSync(artifactPath("report.json"), redact(JSON.stringify(report, null, 2)));

  const lines = [
    "# R108 企业微信移动端视觉巡检报告",
    "",
    `生成时间：${generatedAt}`,
    "",
    "## 结论",
    "",
    `- 完整执行：${completed ? "是" : "否（以浏览器失败为准）"}`,
    `- 巡检记录数：${checks.length}`,
    `- 发现问题数：${findings.length}`,
    `- 截图目录：${path.relative(ROOT_DIR, SCREENSHOT_DIR)}`,
    "",
    "## 发现的问题",
    "",
  ];

  if (!findings.length) {
    lines.push("- 未发现规则命中的移动端视觉/交互/展示问题。");
  } else {
    findings.forEach((finding, index) => {
      lines.push(`${index + 1}. [${finding.severity}] ${finding.page} / ${finding.category}：${finding.title}`);
      lines.push(`   - 详情：${finding.detail.slice(0, 600)}`);
      if (finding.evidence) lines.push(`   - 截图：${finding.evidence}`);
    });
  }

  lines.push("", "## 巡检页面", "");
  checks.forEach((item) => {
    lines.push(`- ${String(item.label)}：${redact(String(item.route))}，viewport=${String(item.width)}x${String(item.height)}，scrollWidth=${String(item.scrollWidth)}`);
  });

  writeFileSync(artifactPath("report.md"), lines.join("\n"));
}

test.describe.serial("R108 企业微信移动端视觉专项", () => {
  test.skip(process.env.E2E_MODE === "live", "R108 本地移动专项只在临时本地环境运行");

  test("员工移动页面、票据上传队列与经理移动审批可巡检", async ({ browser }) => {
    let completed = false;
    const contexts: Array<Awaited<ReturnType<typeof newWecomPage>>["context"]> = [];
    let managerClient: AuthenticatedApiClient | null = null;

    try {
      const reimbursement = await seedEmployeeMobileData();
      managerClient = await createAuthenticatedApiClient(MANAGER);
      const task = await waitForWorkflowTask(managerClient.api, {
        entityId: reimbursement.reimbursementId,
        entityType: "reimbursement",
      });
      expect(task.id).toBe(reimbursement.currentTaskId);

      const employee390 = await newWecomPage(browser, { width: 390, height: 844 });
      contexts.push(employee390.context);
      await loginForMobile(employee390.page, EMPLOYEE);
      await auditMobilePage(employee390.page, { label: "企微 390-首页", route: "/mobile", screenshotName: "mobile-390-home" });
      await auditMobilePage(employee390.page, { label: "企微 390-报销", route: "/mobile/reimbursements", screenshotName: "mobile-390-reimbursements" });
      await auditMobilePage(employee390.page, { label: "企微 390-请假", route: "/mobile/leave", screenshotName: "mobile-390-leave" });
      await auditMobilePage(employee390.page, { label: "企微 390-我的", route: "/mobile/me", screenshotName: "mobile-390-me" });

      await employee390.page.goto("/mobile/capture");
      await expect(employee390.page.getByRole("heading", { name: "票据上传", exact: true })).toBeVisible();
      await employee390.page.context().setOffline(true);
      await employee390.page.evaluate(() => window.dispatchEvent(new Event("offline")));
      await expect(employee390.page.getByText("离线", { exact: true })).toBeVisible();
      await employee390.page.getByTestId("mobile-capture-pdf-file").setInputFiles([
        { name: "r108-mobile-a.pdf", mimeType: "application/pdf", buffer: await syntheticPdf("queue-a") },
        { name: "r108-mobile-b.pdf", mimeType: "application/pdf", buffer: await syntheticPdf("queue-b") },
      ]);
      await expect(employee390.page.getByText("已选择 2 个")).toBeVisible();
      await employee390.page.getByTestId("mobile-capture-upload").click();
      await expect(employee390.page.getByTestId("mobile-capture-queue")).toContainText("待上传 2 项", { timeout: 15_000 });
      await employee390.page.getByRole("button", { name: "移除" }).first().click();
      await expect(employee390.page.getByTestId("mobile-capture-queue")).toContainText("待上传 1 项", { timeout: 15_000 });
      await auditMobilePage(employee390.page, { label: "企微 390-票据上传队列", route: "/mobile/capture", screenshotName: "mobile-390-capture-queue", skipNavigation: true });
      await employee390.page.context().setOffline(false);
      await employee390.page.evaluate(() => window.dispatchEvent(new Event("online")));
      await expect(employee390.page.getByTestId("mobile-capture-queue")).toContainText("无待上传项", { timeout: 30_000 });
      await employee390.context.close();

      const employee414 = await newWecomPage(browser, { width: 414, height: 896 });
      contexts.push(employee414.context);
      await loginForMobile(employee414.page, EMPLOYEE);
      await auditMobilePage(employee414.page, { label: "企微 414-首页", route: "/mobile", screenshotName: "mobile-414-home" });
      await auditMobilePage(employee414.page, { label: "企微 414-票据上传", route: "/mobile/capture", screenshotName: "mobile-414-capture" });
      await employee414.context.close();

      const manager390 = await newWecomPage(browser, { width: 390, height: 844 });
      contexts.push(manager390.context);
      await loginForMobile(manager390.page, MANAGER);
      await manager390.page.goto(`/mobile/approvals?taskId=${encodeURIComponent(task.id)}`);
      await expect(manager390.page.getByTestId("reimbursement-mobile-workspace")).toBeVisible({ timeout: 30_000 });
      await expect(manager390.page.getByTestId("reimbursement-mobile-workspace")).toContainText(reimbursement.formNumber);
      await expect(manager390.page.getByTestId("mobile-approvals-approve")).toBeEnabled();
      await expect(manager390.page.getByTestId("mobile-approvals-reject")).toHaveCount(0);
      await expect(manager390.page.getByTestId("mobile-approvals-return")).toBeEnabled();
      await manager390.page.getByTestId("mobile-approvals-return").click();
      await manager390.page.getByTestId("mobile-approvals-comment").fill("R108 移动审批操作区验证");
      await auditMobilePage(manager390.page, { label: "企微 390-审批详情", route: `/mobile/approvals?taskId=${encodeURIComponent(task.id)}`, screenshotName: "mobile-390-approvals-detail", skipNavigation: true });
      await manager390.page.getByTestId("mobile-approvals-approve").click();
      await expect(manager390.page.getByTestId("workflow-action-confirm-dialog")).toContainText("确认后将进入下一审批节点");
      const approval = manager390.page.waitForResponse(response => new URL(response.url()).pathname === `/api/workflow/tasks/${task.id}/approve` && response.request().method() === "POST");
      await manager390.page.getByTestId("workflow-action-confirm-submit").click();
      expect((await approval).ok()).toBe(true);
      const processed = await apiGetData<{ task: { status: string; outcome: string } }>(managerClient.api, `/api/workflow/tasks/${task.id}`);
      expect(processed.task.status).toBe("completed");
      expect(processed.task.outcome).toBe("approved");
      await expect(manager390.page.getByText("已通过", { exact: true })).toBeVisible({ timeout: 30_000 });
      await manager390.context.close();

      {
        const summary = findings.map((finding) => `${finding.severity} ${finding.page} / ${finding.category}: ${finding.title}`).join("\n");
        expect(findings, summary || "R108 mobile visual findings should be empty").toEqual([]);
      }
      completed = true;
    } finally {
      writeReport(completed);
      await Promise.all([...contexts.map(context => context.close()), managerClient?.dispose()]);
    }
  });
});