import { expect, test, type Page } from "@playwright/test";
import JSZip from "jszip";
import sharp from "sharp";
import { clickXmindAction, clickXmindSheet } from "./editor-actions";

async function openMap(page: Page) {
  await page.goto("/dev/flow-board-preview", { waitUntil: "commit" });
  const zip = new JSZip();
  const image = await sharp({ create: { width: 40, height: 40, channels: 4, background: "#fa1515" } }).png().toBuffer();
  zip.file("resources/red.png", image);
  zip.file("content.json", JSON.stringify([
    { title: "完整画布", rootTopic: { id: "root", title: "图片导出验证", structureClass: "org.xmind.ui.logic.right", children: { attached: Array.from({ length: 20 }, (_, index) => ({
      id: `topic-${index}`, title: `任务 ${index + 1}`,
      ...(index === 0 ? { image: { src: "xap:resources/red.png", width: 40 }, markers: [{ markerId: "priority-1" }] } : {}),
    })) } } },
    { title: "第二页", rootTopic: { id: "other", title: "第二页内容" } },
  ]));
  await page.locator("input[accept*=xmind]").setInputFiles({ name: "图片验证.xmind", mimeType: "application/octet-stream", buffer: await zip.generateAsync({ type: "nodebuffer" }) });
  await expect(page.locator(".drawnix").getByText("图片导出验证", { exact: true })).toBeVisible();
  await expect.poll(() => page.locator(".drawnix .xmind-topic-marker").evaluate((node: HTMLImageElement) => node.complete && node.naturalWidth > 0)).toBe(true);
}

async function exportPng(page: Page, scale: number, transparent: boolean) {
  await page.getByRole("button", { name: "更多导出选项", exact: true }).click();
  await page.getByRole("menuitem", { name: "导出图片", exact: true }).click();
  const dialog = page.getByRole("dialog", { name: "导出图片", exact: true });
  await dialog.getByLabel("图片清晰度").selectOption(String(scale));
  await dialog.getByLabel("透明背景").setChecked(transparent);
  const pending = page.waitForEvent("download");
  await dialog.getByRole("button", { name: "导出 PNG", exact: true }).click();
  const download = await pending;
  const stream = await download.createReadStream();
  const chunks: Buffer[] = [];
  for await (const chunk of stream!) chunks.push(chunk);
  await expect(dialog).not.toBeVisible();
  return { bytes: Buffer.concat(chunks), download };
}

test("PNG exports full content with text, markers, images and transparent high resolution independently of zoom", async ({ page }) => {
  const errors: string[] = [];
  page.on("pageerror", error => errors.push(error.message));
  await openMap(page);
  const standard = await exportPng(page, 1, false);
  expect(standard.download.suggestedFilename()).toBe("图片验证-完整画布.png");
  const { data, info } = await sharp(standard.bytes).ensureAlpha().raw().toBuffer({ resolveWithObject: true });
  expect(info.height).toBeGreaterThan(900); // Includes branches outside the viewport.
  expect(Array.from(data.subarray(0, 4))).toEqual([255, 255, 255, 255]);
  let red = 0, dark = 0;
  for (let index = 0; index < data.length; index += 4) {
    if (data[index] > 210 && data[index + 1] < 60 && data[index + 2] < 60) red++;
    if (data[index] < 80 && data[index + 1] < 80 && data[index + 2] < 80) dark++;
  }
  expect(red).toBeGreaterThan(500);
  expect(dark).toBeGreaterThan(300); // Topic text is rasterized, not just node shapes.
  await standard.download.saveAs(test.info().outputPath("complete.png"));
  const high = await exportPng(page, 2, true);
  const highInfo = await sharp(high.bytes).metadata();
  expect(highInfo.width).toBe(info.width * 2);
  expect(highInfo.height).toBe(info.height * 2);
  const corner = await sharp(high.bytes).extract({ left: 0, top: 0, width: 1, height: 1 }).ensureAlpha().raw().toBuffer();
  expect(corner[3]).toBe(0);
  await high.download.saveAs(test.info().outputPath("transparent.png"));
  await clickXmindAction(page, "缩小");
  await clickXmindAction(page, "缩小");
  const zoomed = await exportPng(page, 2, true);
  expect(zoomed.bytes.equals(high.bytes)).toBe(true);
  await clickXmindSheet(page, "第二页");
  await expect(page.locator(".drawnix").getByText("第二页内容", { exact: true })).toBeVisible();
  const second = await exportPng(page, 3, false);
  expect(second.download.suggestedFilename()).toBe("图片验证-第二页.png");
  expect((await sharp(second.bytes).metadata()).height).toBeLessThan(info.height);
  expect(errors).toEqual([]);
});

test("image export is keyboard dismissible and failed resources show a recoverable error", async ({ page }) => {
  await openMap(page);
  await page.getByRole("button", { name: "文件与编辑", exact: true }).click();
  await page.getByRole("menuitem", { name: "导出图片", exact: true }).click();
  const dialog = page.getByRole("dialog", { name: "导出图片", exact: true });
  await expect(dialog).toBeVisible();
  await page.keyboard.press("Escape");
  await expect(dialog).not.toBeVisible();
  await page.route("**/fonts/xmind/NeverMind-Bold.ttf", route => route.fulfill({ status: 503, body: "unavailable" }));
  await page.getByRole("button", { name: "更多导出选项", exact: true }).click();
  await page.getByRole("menuitem", { name: "导出图片", exact: true }).click();
  await dialog.getByRole("button", { name: "导出 PNG", exact: true }).click();
  await expect(page.getByText("图片资源加载失败，请稍后重试", { exact: true })).toBeVisible();
  await expect(dialog.getByRole("button", { name: "导出 PNG", exact: true })).toBeEnabled();
  await dialog.getByRole("button", { name: "取消", exact: true }).click();
  await expect(dialog).not.toBeVisible();
});

test("PNG includes relationships, boundaries and summaries without selection outlines", async ({ page }) => {
  await page.goto("/dev/flow-board-preview", { waitUntil: "commit" });
  const zip = new JSZip();
  zip.file("content.json", JSON.stringify([{ title: "结构", rootTopic: {
    id: "r", title: "结构验证", structureClass: "org.xmind.ui.logic.right",
    children: { attached: [{ id: "a", title: "设计" }, { id: "b", title: "交付" }], summary: [{ id: "s", title: "阶段概要" }] },
    summaries: [{ range: "(0,1)", topicId: "s" }],
    boundaries: [{ range: "(0,1)", style: { properties: { "line-color": "#00ff00" } } }],
  }, relationships: [{ end1Id: "a", end2Id: "b", title: "验收联系", style: { properties: { "line-color": "#ff00ff" } } }] }]));
  await page.locator("input[accept*=xmind]").setInputFiles({ name: "结构验证.xmind", mimeType: "application/octet-stream", buffer: await zip.generateAsync({ type: "nodebuffer" }) });
  const canvas = page.locator(".drawnix");
  await expect(canvas.getByText("阶段概要", { exact: true })).toBeVisible();
  await expect(canvas.getByText("验收联系", { exact: true })).toBeVisible();
  const plain = await exportPng(page, 2, false);
  const data = await sharp(plain.bytes).ensureAlpha().raw().toBuffer();
  let green = 0, purple = 0;
  for (let index = 0; index < data.length; index += 4) {
    if (data[index] < 60 && data[index + 1] > 200 && data[index + 2] < 60) green++;
    if (data[index] > 200 && data[index + 1] < 60 && data[index + 2] > 200) purple++;
  }
  expect(green).toBeGreaterThan(40);
  expect(purple).toBeGreaterThan(40);
  await canvas.getByText("设计", { exact: true }).click();
  const selected = await exportPng(page, 2, false);
  expect(selected.bytes.equals(plain.bytes)).toBe(true);
  await selected.download.saveAs(test.info().outputPath("annotations.png"));
});