const assert = require("assert");
const fs = require("fs");
const path = require("path");
const ejs = require("ejs");

const root = path.join(__dirname, "..");

function listFiles(directory, extension, output = []) {
  for (const entry of fs.readdirSync(directory, { withFileTypes: true })) {
    const target = path.join(directory, entry.name);
    if (entry.isDirectory()) listFiles(target, extension, output);
    else if (target.endsWith(extension)) output.push(target);
  }
  return output;
}

function verifyViews() {
  const viewRoots = [path.join(root, "src", "web", "views"), path.join(root, "plugins")];
  const files = viewRoots.flatMap((directory) => listFiles(directory, ".ejs"));
  for (const file of files) {
    ejs.compile(fs.readFileSync(file, "utf8"), { filename: file });
  }
  return files.length;
}

function verifyThemeService() {
  const sandbox = fs.mkdtempSync(path.join(root, ".tmp-lumi-theme-test-"));
  const serviceDir = path.join(sandbox, "src", "services");
  let database = null;
  fs.mkdirSync(serviceDir, { recursive: true });
  for (const file of ["config.js", "db.js", "settings.js", "themes.js"]) {
    fs.copyFileSync(
      path.join(root, "src", "services", file),
      path.join(serviceDir, file)
    );
  }

  try {
    database = require(path.join(serviceDir, "db.js"));
    database.migrate();
    require(path.join(serviceDir, "settings.js")).ensureDefaults();
    const themes = require(path.join(serviceDir, "themes.js"));

    assert.strictEqual(themes.BUILTIN_THEMES.length, 6);
    for (const theme of themes.BUILTIN_THEMES) {
      assert.deepStrictEqual(themes.validateThemeValues(theme), []);
    }

    const library = themes.listThemes();
    assert(library.every((theme) => theme.builtin));
    assert.throws(
      () => themes.saveCustomTheme("builtin:lumi-default", library[0]),
      /read-only/
    );

    const copy = themes.duplicateTheme("builtin:midnight", "Verification Theme");
    assert.strictEqual(copy.builtin, false);
    assert.strictEqual(copy.typography.bodyFont, "lumi");
    themes.setActiveTheme(copy.id);
    assert.strictEqual(themes.getActiveTheme().id, copy.id);

    const invalid = JSON.parse(JSON.stringify(copy));
    invalid.light.text = "not-a-color";
    assert.throws(() => themes.saveCustomTheme(copy.id, invalid), /hex color/);
    invalid.light.text = copy.light.text;
    invalid.typography.bodyFont = "external-css";
    assert.throws(() => themes.saveCustomTheme(copy.id, invalid), /font preset/);

    const renamed = themes.renameCustomTheme(copy.id, "Verified Theme");
    assert.strictEqual(renamed.name, "Verified Theme");

    const repaired = themes.normalizeThemeValues({
      ...renamed,
      light: { ...renamed.light, text: "#ffffff", surface: "#ffffff" }
    });
    assert.notStrictEqual(repaired.light.text, repaired.light.surface);

    const themeView = path.join(root, "src", "web", "views", "admin-theme.ejs");
    const rendered = ejs.render(fs.readFileSync(themeView, "utf8"), {
      title: "Theming",
      siteTitle: "Lumi Bot",
      assetVersion: "verify",
      theme: renamed,
      activeTheme: renamed,
      themes: themes.listThemes(),
      editingTheme: renamed,
      editingBaseTheme: themes.getThemeById(renamed.baseThemeId),
      fontStacks: themes.FONT_STACKS,
      botAvatar: null,
      navSections: [],
      user: { username: "Admin" },
      userAvatar: null,
      userInitial: "A",
      platformLogins: [],
      flash: null,
      softError: null
    }, { filename: themeView });
    assert(rendered.includes("data-theme-editor"));
    assert(rendered.includes("data-theme-font"));
    assert(rendered.includes("data-theme-popout"));
    assert(rendered.includes("data-lumi-state-button"));
    assert(rendered.includes("Built-in · read-only"));

    const loginView = path.join(root, "src", "web", "views", "localhost-login.ejs");
    const loginRendered = ejs.render(fs.readFileSync(loginView, "utf8"), {
      title: "Localhost Login",
      username: "admin",
      siteTitle: "Lumi Bot",
      assetVersion: "verify",
      theme: renamed,
      botAvatar: null,
      navSections: [],
      user: null,
      userAvatar: null,
      userInitial: "",
      platformLogins: [{ id: "localhost", label: "Localhost Login", configured: true, loginPath: "/auth/localhost" }],
      flash: null,
      softError: null
    }, { filename: loginView });
    assert(loginRendered.includes("admin / admin"));

    const statusView = path.join(root, "plugins", "moderation", "views", "status.ejs");
    const statusRendered = ejs.render(fs.readFileSync(statusView, "utf8"), {
      title: "Access restricted",
      assetVersion: "verify",
      theme: renamed,
      sanction: {
        action_type: "timeout",
        status: "active",
        created_at: Date.now(),
        expires_at: Date.now() + 60000,
        reason_short: "Verification",
        reason_detail: "Standalone themed view verification.",
        created_by_name: "Admin"
      }
    }, { filename: statusView });
    assert(statusRendered.includes("/lumi-components.css"));
    assert(statusRendered.includes('data-theme-id="custom:'));

    themes.deleteCustomTheme(copy.id);
    assert.strictEqual(themes.getActiveTheme().id, themes.DEFAULT_THEME_ID);
  } finally {
    database?.db.close();
    fs.rmSync(sandbox, { recursive: true, force: true });
  }
}

const viewCount = verifyViews();
verifyThemeService();
console.log(`WebUI verification passed: ${viewCount} EJS views and theme CRUD.`);