import { describe, expect, it } from "vitest";
import {
  buildNamingContext,
  compileTemplate,
  DEFAULT_TEMPLATES,
  detectPathConflicts,
  type PathBinding,
  parseRelease,
  renderMediaFileName,
  renderTemplate,
  resolveTargetDirectory,
  sanitizeFileName,
  sanitizeSegment,
  TemplateError,
  toDownloaderPath,
  toHostPath,
  utf8Length,
  validatePathMappings,
  validateTemplateSet,
} from "../src";

const root = { id: "lib-tv", hostPath: "/media/tv" };
const binding = (over: Partial<PathBinding>): PathBinding => ({
  id: "b1",
  entityId: "e1",
  scope: "entity",
  libraryRootId: "lib-tv",
  relativePath: "最后生还者 (2023)",
  templateVersion: 1,
  ...over,
});

describe("路径绑定", () => {
  it("已有作品/季绑定优先且不随译名变化", () => {
    const r = resolveTargetDirectory({
      entity: { id: "e1", kind: "tv" },
      naming: { title: "最后的生还者", year: 2023 },
      season: 1,
      bindings: [binding({}), binding({ id: "b2", scope: "season", season: 1, relativePath: "最后生还者 (2023)/S1" })],
      libraryRoot: root,
      templates: DEFAULT_TEMPLATES,
    });
    expect(r).toEqual({
      kind: "existing",
      libraryRootId: "lib-tv",
      relativePath: "最后生还者 (2023)/S1",
      bindingIds: ["b2"],
    });
  });
  it("作品已绑定、新季:只按模板渲染季目录,作品目录复用", () => {
    const r = resolveTargetDirectory({
      entity: { id: "e1", kind: "tv" },
      naming: { title: "新译名", year: 2023 },
      season: 2,
      bindings: [binding({})],
      libraryRoot: { id: "other", hostPath: "/x" },
      templates: DEFAULT_TEMPLATES,
    });
    expect(r).toMatchObject({
      kind: "new",
      libraryRootId: "lib-tv",
      relativePath: "最后生还者 (2023)/Season 2",
      reusedBindingIds: ["b1"],
      newBindings: [{ scope: "season", season: 2, templateVersion: 1 }],
    });
  });
  it("首次:作品 + 季两级绑定,非法字符转全角", () => {
    const r = resolveTargetDirectory({
      entity: { id: "e9", kind: "tv" },
      naming: { title: "Show: Part/2" },
      season: 1,
      bindings: [binding({})],
      libraryRoot: root,
      templates: DEFAULT_TEMPLATES,
    });
    expect(r).toMatchObject({ kind: "new", relativePath: "Show： Part／2/Season 1" });
    if (r.kind === "new") expect(r.newBindings).toHaveLength(2);
  });
  it("电影:已有 / 首次 / 模板缺变量", () => {
    const mv = { entity: { id: "m1", kind: "movie" as const }, libraryRoot: root, templates: DEFAULT_TEMPLATES };
    expect(
      resolveTargetDirectory({
        ...mv,
        naming: { title: "X" },
        bindings: [binding({ entityId: "m1", relativePath: "沙丘2 (2024)" })],
      }),
    ).toMatchObject({ kind: "existing", relativePath: "沙丘2 (2024)" });
    expect(
      resolveTargetDirectory({ ...mv, naming: { title: "沙丘：第二部", year: 2024 }, bindings: [] }),
    ).toMatchObject({
      kind: "new",
      relativePath: "沙丘：第二部 (2024)",
    });
    expect(resolveTargetDirectory({ ...mv, naming: {}, bindings: [] })).toEqual({
      kind: "error",
      reason: "template_missing_vars",
      missing: ["title"],
    });
  });
  it("两个历史目录 → conflict,不自动合并;停用绑定忽略", () => {
    const two = [binding({}), binding({ id: "b3", relativePath: "The Last of Us (2023)" })];
    expect(
      resolveTargetDirectory({
        entity: { id: "e1", kind: "tv" },
        naming: { title: "x" },
        season: 1,
        bindings: two,
        libraryRoot: root,
        templates: DEFAULT_TEMPLATES,
      }),
    ).toMatchObject({ kind: "conflict", reason: "multiple_entity_bindings" });
    const inactive = [binding({}), binding({ id: "b3", relativePath: "Old", active: false })];
    expect(
      resolveTargetDirectory({
        entity: { id: "e1", kind: "tv" },
        naming: { title: "x" },
        season: 1,
        bindings: inactive,
        libraryRoot: root,
        templates: DEFAULT_TEMPLATES,
      }).kind,
    ).toBe("new");
    const seasons = [
      binding({ id: "s1", scope: "season", season: 1, relativePath: "A/S1" }),
      binding({ id: "s2", scope: "season", season: 1, relativePath: "A/Season 1" }),
    ];
    expect(
      resolveTargetDirectory({
        entity: { id: "e1", kind: "tv" },
        naming: { title: "x" },
        season: 1,
        bindings: seasons,
        libraryRoot: root,
        templates: DEFAULT_TEMPLATES,
      }),
    ).toMatchObject({ kind: "conflict", reason: "multiple_season_bindings" });
  });
  it("剧集缺季号 / 模板缺变量", () => {
    const tv = { entity: { id: "e5", kind: "tv" as const }, bindings: [], libraryRoot: root };
    expect(resolveTargetDirectory({ ...tv, naming: { title: "x" }, templates: DEFAULT_TEMPLATES })).toEqual({
      kind: "error",
      reason: "season_required",
    });
    expect(resolveTargetDirectory({ ...tv, naming: {}, season: 1, templates: DEFAULT_TEMPLATES })).toMatchObject({
      kind: "error",
      missing: ["title"],
    });
    expect(
      resolveTargetDirectory({
        ...tv,
        naming: { title: "x" },
        season: 1,
        templates: { ...DEFAULT_TEMPLATES, seasonDir: "S{episode}" },
      }),
    ).toMatchObject({ kind: "error", missing: ["episode"] });
  });
});

describe("命名模板", () => {
  it("电影 / 剧集 / 多集区间 / 综艺日期", () => {
    const movie = buildNamingContext(
      { title: "沙丘2", year: 2024 },
      parseRelease("Dune.Part.Two.2024.2160p.UHD.BluRay.x265-CHD"),
    );
    expect(renderMediaFileName("movie", DEFAULT_TEMPLATES, movie, "MKV")).toEqual({
      ok: true,
      fileName: "沙丘2 (2024) - 2160p.mkv",
    });
    const cut = buildNamingContext({ title: "指环王", year: 2001 }, parseRelease("LOTR.2001.Extended.1080p.BluRay"));
    expect(renderMediaFileName("movie", DEFAULT_TEMPLATES, cut, "mkv")).toMatchObject({
      fileName: "指环王 (2001) - Extended - 1080p.mkv",
    });
    const ep = buildNamingContext({ title: "庆余年" }, parseRelease("Show.S02E01-E03.1080p"));
    expect(ep.seasonEpisode).toBe("S02E01-E03");
    expect(renderMediaFileName("tv", DEFAULT_TEMPLATES, ep, "mkv")).toMatchObject({
      fileName: "庆余年 - S02E01-E03.mkv",
    });
    const daily = buildNamingContext({ title: "奔跑吧" }, parseRelease("奔跑吧 第十二季 20240426 第1期 1080p"));
    expect(renderMediaFileName("tv", DEFAULT_TEMPLATES, daily, "mp4")).toMatchObject({
      fileName: "奔跑吧 - 2024-04-26 - 第1期.mp4",
    });
    expect(renderMediaFileName("tv", DEFAULT_TEMPLATES, { title: "x" }, "mp4")).toEqual({
      ok: false,
      missing: ["episode_or_air_date"],
    });
    expect(renderMediaFileName("movie", DEFAULT_TEMPLATES, {}, "mp4")).toEqual({ ok: false, missing: ["title"] });
  });
  it("上下文完整字段", () => {
    const ctx = buildNamingContext(
      { title: "T", originalTitle: "O", year: 2020 },
      parseRelease("T.2020.S01E05.CD2.2160p.WEB-DL.DV.HEVC-GRP"),
    );
    expect(ctx).toMatchObject({
      originalTitle: "O",
      episode: 5,
      part: "CD2",
      source: "WEB-DL",
      videoCodec: "H.265",
      hdr: "DV",
      releaseGroup: "GRP",
    });
    expect(buildNamingContext({ title: "T" })).toEqual({ title: "T" });
  });
  it("格式化与可选片段", () => {
    expect(renderTemplate("S{season:02}E{episode:03}", { season: 1, episode: 5 })).toEqual({
      ok: true,
      value: "S01E005",
    });
    expect(renderTemplate("{airDate:dot}", { airDate: "20240101" })).toEqual({ ok: true, value: "2024.01.01" });
    expect(renderTemplate("{title:zz}", { title: "a" })).toEqual({ ok: true, value: "a" });
    expect(renderTemplate("A[[ - {part}]] B", { part: "" })).toEqual({ ok: true, value: "A B" });
    expect(renderTemplate("{title}/{year}", { title: "a/b" })).toEqual({ ok: false, missing: ["year"] });
    expect(renderTemplate(compileTemplate("{title}"), { title: "a/b" })).toEqual({ ok: true, value: "a／b" });
    expect(compileTemplate("{title}[[ ({year})]]").vars).toEqual(["title", "year"]);
  });
  it("模板校验:白名单、括号", () => {
    for (const bad of ["{evil}", "{title", "a]]", "[[a", "[[ [[x]] ]]", "x".repeat(600)])
      expect(() => compileTemplate(bad), bad).toThrow(TemplateError);
    expect(() => validateTemplateSet(DEFAULT_TEMPLATES)).not.toThrow();
    expect(() => validateTemplateSet({ ...DEFAULT_TEMPLATES, dailyFile: "{constructor}" })).toThrow(TemplateError);
  });
});

describe("非法字符处理", () => {
  it("转全角、去控制字符、首尾点空白、保留名、空串", () => {
    expect(sanitizeSegment('A:B*C?"D<E>F|G\\H/I')).toBe("A：B＊C？＂D＜E＞F｜G＼H／I");
    expect(sanitizeSegment("  ..hidden. ")).toBe("hidden");
    expect(sanitizeSegment("a\u0000b\u001f\u007fc")).toBe("abc");
    expect(sanitizeSegment("CON")).toBe("CON_");
    expect(sanitizeSegment("...")).toBe("_");
    expect(sanitizeSegment("a   b")).toBe("a b");
  });
  it("UTF-8 字节截断,扩展名保留", () => {
    const long = "长".repeat(200);
    const s = sanitizeSegment(long);
    expect(utf8Length(s)).toBeLessThanOrEqual(255);
    const f = sanitizeFileName(long, ".MKV");
    expect(f.endsWith(".mkv")).toBe(true);
    expect(utf8Length(f)).toBeLessThanOrEqual(255);
    expect(sanitizeFileName("a", "")).toBe("a");
  });
});

describe("冲突检测", () => {
  it("计划内重复 / 已存在 / 大小写碰撞", () => {
    const out = detectPathConflicts(
      [
        { src: "1", dst: "/m/A.mkv" },
        { src: "2", dst: "/m/A.mkv" },
        { src: "3", dst: "/m/b.mkv" },
        { src: "4", dst: "/m/C.mkv" },
        { src: "5", dst: "/m/c.mkv" },
      ],
      [{ path: "/m/A.mkv", size: 1 }, { path: "/m/B.mkv" }],
      { caseInsensitive: true },
    );
    expect(out.map((c) => `${c.kind}:${c.dst}`)).toEqual([
      "duplicate_in_plan:/m/A.mkv",
      "exists:/m/A.mkv",
      "case_collision:/m/b.mkv",
      "case_collision:/m/c.mkv",
    ]);
    expect(detectPathConflicts([{ src: "3", dst: "/m/b.mkv" }], [{ path: "/m/B.mkv" }])).toEqual([]);
  });
});

describe("下载器 ↔ 宿主路径映射", () => {
  const maps = [
    { instanceId: "qb1", downloaderPath: "/downloads", hostPath: "/mnt/cache/qb1" },
    { instanceId: "qb1", downloaderPath: "/downloads/tv", hostPath: "/mnt/array/tv-dl" },
    { instanceId: "qb2", downloaderPath: "D:\\Downloads\\", hostPath: "/mnt/win" },
    { instanceId: "qb3", downloaderPath: "/", hostPath: "/srv/qb3" },
  ];
  it("最长前缀、按段边界、多实例", () => {
    expect(toHostPath("/downloads/movie/a.mkv", "qb1", maps)).toMatchObject({
      ok: true,
      path: "/mnt/cache/qb1/movie/a.mkv",
    });
    expect(toHostPath("/downloads/tv/s/a.mkv", "qb1", maps)).toMatchObject({
      ok: true,
      path: "/mnt/array/tv-dl/s/a.mkv",
    });
    expect(toHostPath("/downloads2/a.mkv", "qb1", maps)).toEqual({ ok: false, reason: "no_mapping" });
    expect(toHostPath("/downloads", "qb1", maps)).toMatchObject({ ok: true, path: "/mnt/cache/qb1" });
    expect(toHostPath("D:\\Downloads\\x\\a.mkv", "qb2", maps)).toMatchObject({ ok: true, path: "/mnt/win/x/a.mkv" });
    expect(toHostPath("/any/a.mkv", "qb3", maps)).toMatchObject({ ok: true, path: "/srv/qb3/any/a.mkv" });
    expect(toHostPath("/downloads/a", "nope", maps)).toEqual({ ok: false, reason: "no_mapping" });
    expect(toDownloaderPath("/mnt/cache/qb1/movie/a.mkv", "qb1", maps)).toMatchObject({
      ok: true,
      path: "/downloads/movie/a.mkv",
    });
    expect(toDownloaderPath("/srv/qb3/a", "qb3", maps)).toMatchObject({ ok: true, path: "/a" });
  });
  it("同前缀多目标 → ambiguous / 配置校验", () => {
    const bad = [
      { instanceId: "q", downloaderPath: "/d", hostPath: "/a" },
      { instanceId: "q", downloaderPath: "/d/", hostPath: "/b" },
    ];
    expect(toHostPath("/d/x", "q", bad)).toEqual({ ok: false, reason: "ambiguous" });
    expect(validatePathMappings(bad)).toHaveLength(1);
    expect(validatePathMappings(maps)).toEqual([]);
  });
});