const fs = require('node:fs');
const path = require('node:path');
const vm = require('node:vm');
const test = require('node:test');
const assert = require('node:assert/strict');

function loadScript(scriptPath, sandbox) {
  const source = fs.readFileSync(scriptPath, 'utf8');
  vm.runInNewContext(source, sandbox, { filename: scriptPath });
}

function loadHtmlScript(scriptPath, sandbox) {
  const source = fs.readFileSync(scriptPath, 'utf8').match(/<script>([\s\S]*)<\/script>/);
  if (!source) {
    throw new Error(`Unable to extract script body from ${scriptPath}`);
  }
  const script = source[1].trim();
  vm.runInNewContext(script, sandbox, { filename: scriptPath });
}

test('webpage preloading only targets the next slide', () => {
  const sandbox = {
    window: null,
    Date,
    Array,
    Number,
    String,
    Boolean,
    Object,
    Math,
    console,
    escapeHtml(value) {
      return String(value || '');
    },
    currentPlaylistSignature: 'signature',
    slides: [],
    index: 0,
    activeSlidesCacheKey: '',
    activeSlidesCacheValue: [],
    renderCacheViewportKey: '',
    preloadSignature: '',
    preloadContainer: null
  };
  sandbox.window = sandbox;

  loadScript(path.join(__dirname, '..', 'src', 'player', 'public', 'js', 'player-page-playlist.js'), sandbox);

  const current = { id: 1 };
  const next = { id: 2 };
  const later = { id: 3 };

  assert.equal(sandbox.getWebpagePreloadSlides([current, next, later], 0).map((slide) => slide.id).join(','), '2');
  assert.equal(sandbox.getWebpagePreloadSlides([current, next, later], 1).map((slide) => slide.id).join(','), '3');
  assert.equal(sandbox.getWebpagePreloadSlides([current, next, later], 2).map((slide) => slide.id).join(','), '');
});

test('rtmp warmups only target the next slide', () => {
  const sandbox = {
    window: null,
    Date,
    Array,
    Number,
    String,
    Boolean,
    Object,
    Math,
    console,
    fetch() {
      throw new Error('not expected');
    },
    currentPlaylistSkipUnavailableRtmp: false,
    videoRegionRenderVersion: 0,
    slideMarkupCache: Object.create(null),
    slides: [],
    index: 0,
    setTimeout,
    clearTimeout,
    document: {
      createElement() {
        return {
          className: '',
          setAttribute() {},
          appendChild() {},
          parentNode: null,
          addEventListener() {}
        };
      },
      body: {
        appendChild() {}
      }
    },
    pulsePlayerRegionTypes: {
      register() {}
    }
  };
  sandbox.window = sandbox;

  loadScript(path.join(__dirname, '..', 'src', 'player', 'regions', 'rtmp.js'), sandbox);

  const current = { id: 1 };
  const next = { id: 2 };
  const later = { id: 3 };

  assert.equal(sandbox.getRtmpWarmupSlides([current, next, later], 0).map((slide) => slide.id).join(','), '2');
  assert.equal(sandbox.getRtmpWarmupSlides([current, next, later], 1).map((slide) => slide.id).join(','), '3');
  assert.equal(sandbox.getRtmpWarmupSlides([current, next, later], 2).map((slide) => slide.id).join(','), '');
});

test('command client ids stay scoped to the screen session', () => {
  const sessionStorage = (() => {
    const values = new Map();
    return {
      getItem(key) {
        return values.has(key) ? values.get(key) : null;
      },
      setItem(key, value) {
        values.set(String(key), String(value));
      }
    };
  })();

  const localStorage = (() => {
    const values = new Map();
    return {
      getItem(key) {
        return values.has(key) ? values.get(key) : null;
      },
      setItem(key, value) {
        values.set(String(key), String(value));
      }
    };
  })();

  const sandbox = {
    window: null,
    Date,
    Array,
    Number,
    String,
    Boolean,
    Object,
    Math,
    console,
    crypto: {
      randomUUID() {
        return 'tab-session-client-id';
      }
    },
    localStorage,
    sessionStorage,
    commandClientId: null,
    commandClientStorageKey: 'pulse-command-client-id',
    currentPlaylistSignature: 'signature',
    slides: [],
    index: 0,
    activeSlidesCacheKey: '',
    activeSlidesCacheValue: [],
    renderCacheViewportKey: '',
    preloadSignature: '',
    preloadContainer: null
  };
  sandbox.window = sandbox;

  loadScript(path.join(__dirname, '..', 'src', 'player', 'public', 'js', 'player-page-playlist.js'), sandbox);

  assert.equal(sandbox.getCommandClientId(), 'tab-session-client-id');
  assert.equal(sessionStorage.getItem('pulse-command-client-id'), 'tab-session-client-id');
  assert.equal(localStorage.getItem('pulse-command-client-id'), null);
});

test('player client names stay scoped to the tab session', () => {
  const sessionStorage = (() => {
    const values = new Map([['pulse-signage-player-client-name', 'tab-only-name']]);
    return {
      getItem(key) {
        return values.has(key) ? values.get(key) : null;
      },
      setItem(key, value) {
        values.set(String(key), String(value));
      }
    };
  })();

  const localStorage = (() => {
    const values = new Map([['pulse-signage-player-client-name', 'shared-name']]);
    return {
      getItem(key) {
        return values.has(key) ? values.get(key) : null;
      },
      setItem(key, value) {
        values.set(String(key), String(value));
      }
    };
  })();

  const sandbox = {
    window: null,
    Date,
    Array,
    Number,
    String,
    Boolean,
    Object,
    Math,
    console,
    sessionStorage,
    localStorage,
    WebSocket: { OPEN: 1 },
    sendCommandState() {}
  };
  sandbox.window = sandbox;

  loadHtmlScript(path.join(__dirname, '..', 'src', 'player', 'player-client-name.script.html'), sandbox);

  assert.equal(sandbox.getOnboardingClientName(), 'tab-only-name');
  assert.equal(localStorage.getItem('pulse-signage-player-client-name'), 'shared-name');

  sandbox.applyOnboardingClientName('Renamed Tab Client', null);
  assert.equal(sessionStorage.getItem('pulse-signage-player-client-name'), 'Renamed Tab Client');
  assert.equal(localStorage.getItem('pulse-signage-player-client-name'), 'shared-name');
});

test('onboarding device ids stay scoped to the tab session', () => {
  const sessionStorage = (() => {
    const values = new Map();
    return {
      getItem(key) {
        return values.has(key) ? values.get(key) : null;
      },
      setItem(key, value) {
        values.set(String(key), String(value));
      }
    };
  })();

  const localStorage = (() => {
    const values = new Map([['pulse-signage-player-device-id', 'shared-device-id']]);
    return {
      getItem(key) {
        return values.has(key) ? values.get(key) : null;
      },
      setItem(key, value) {
        values.set(String(key), String(value));
      }
    };
  })();

  const sandbox = {
    window: null,
    Date,
    Array,
    Number,
    String,
    Boolean,
    Object,
    Math,
    console,
    sessionStorage,
    localStorage,
    crypto: {
      randomUUID() {
        return 'tab-device-id';
      }
    },
    fetch() {
      return Promise.resolve({
        ok: true,
        json() {
          return Promise.resolve({ onboarded: false, screens: [] });
        },
        text() {
          return Promise.resolve('');
        }
      });
    },
    document: {
      getElementById() {
        return null;
      },
      createElement() {
        return { appendChild() {}, removeChild() {} };
      }
    },
    location: {
      replace() {}
    },
    setInterval() {
      return 1;
    },
    clearInterval() {}
  };
  sandbox.window = sandbox;

  loadHtmlScript(path.join(__dirname, '..', 'src', 'player', 'onboarding', 'player-onboarding-landing.script.html'), sandbox);

  assert.equal(sessionStorage.getItem('pulse-signage-player-device-id'), 'tab-device-id');
  assert.equal(localStorage.getItem('pulse-signage-player-device-id'), 'shared-device-id');
});

test('player onboarding device ids are generated when missing', () => {
  const sessionStorage = (() => {
    const values = new Map();
    return {
      getItem(key) {
        return values.has(key) ? values.get(key) : null;
      },
      setItem(key, value) {
        values.set(String(key), String(value));
      }
    };
  })();

  const sandbox = {
    window: null,
    Date,
    Array,
    Number,
    String,
    Boolean,
    Object,
    Math,
    console,
    sessionStorage,
    localStorage: sessionStorage,
    crypto: {
      randomUUID() {
        return 'generated-device-id';
      }
    },
    WebSocket: { OPEN: 1 },
    sendCommandState() {}
  };
  sandbox.window = sandbox;

  loadHtmlScript(path.join(__dirname, '..', 'src', 'player', 'player-client-name.script.html'), sandbox);

  assert.equal(sandbox.getOnboardingDeviceId(), 'generated-device-id');
  assert.equal(sessionStorage.getItem('pulse-signage-player-device-id'), 'generated-device-id');
});