import { mkdtemp, rm, writeFile } from "node:fs/promises";
import os from "node:os";
import path from "node:path";
import { describe, expect, it } from "vitest";
import {
  findMarkdownFileArgument,
  isMarkdownFilePath,
  readMarkdownDocument
} from "../src/markdown-file.js";

describe("桌面 Markdown 文件参数", () => {
  it("识别两种 Markdown 扩展名且忽略大小写", () => {
    expect(isMarkdownFilePath("C:\\docs\\周报.md")).toBe(true);
    expect(isMarkdownFilePath("C:\\docs\\说明.MARKDOWN")).toBe(true);
    expect(isMarkdownFilePath("C:\\docs\\说明.txt")).toBe(false);
  });

  it("从启动参数中提取绝对 Markdown 路径", () => {
    expect(
      findMarkdownFileArgument(
        [
          "C:\\Program Files\\md-to-pdf\\md-to-pdf.exe",
          "--original-process-start-time=1",
          "D:\\文档\\项目周报.md"
        ],
        "C:\\Windows"
      )
    ).toBe(path.normalize("D:\\文档\\项目周报.md"));
  });

  it("根据第二实例的工作目录解析相对路径", () => {
    expect(
      findMarkdownFileArgument(
        ["md-to-pdf.exe", "docs\\readme.markdown"],
        "D:\\项目"
      )
    ).toBe(path.resolve("D:\\项目", "docs\\readme.markdown"));
  });

  it("忽略非 Markdown 文件及 Chromium 参数", () => {
    expect(
      findMarkdownFileArgument(
        ["md-to-pdf.exe", "--inspect", "notes.txt"],
        "C:\\项目"
      )
    ).toBeUndefined();
  });

  it("统一读取 Markdown 并限制解码后的字符数", async () => {
    const directory = await mkdtemp(
      path.join(os.tmpdir(), "md-to-pdf-markdown-")
    );
    const filePath = path.join(directory, "示例.md");
    try {
      await writeFile(filePath, "# 示例", "utf8");
      await expect(
        readMarkdownDocument(filePath, 20)
      ).resolves.toEqual({
        markdown: "# 示例",
        fileName: "示例.md"
      });
      await expect(
        readMarkdownDocument(filePath, 2)
      ).rejects.toThrow("Markdown 文件过大");
    } finally {
      await rm(directory, { recursive: true, force: true });
    }
  });

  it("拒绝非 Markdown 扩展名", async () => {
    await expect(
      readMarkdownDocument("C:\\docs\\说明.txt", 100)
    ).rejects.toThrow("只允许打开 .md 或 .markdown 文件");
  });
});