import { spawn, spawnSync } from 'node:child_process';
import { mkdirSync } from 'node:fs';
import { chromium } from 'playwright';

const targetUrl = withDebugParam(process.env.RELEASE_QA_URL ?? 'http://127.0.0.1:4173/');
const screenshotDir = 'dist';

let serverProcess;
let browser;

try {
  runCommand('node', ['scripts/verify-static-data.mjs']);
  mkdirSync(screenshotDir, { recursive: true });
  serverProcess = await ensurePreviewServer(targetUrl);
  runCommand(process.execPath, ['scripts/verify-save-retry-flow.mjs'], { VERIFY_URL: targetUrl });

  browser = await chromium.launch({ headless: true });
  const page = await browser.newPage({ viewport: { width: 1280, height: 720 } });
  const consoleMessages = [];
  page.on('console', (message) => {
    consoleMessages.push({ type: message.type(), text: message.text() });
  });

  await page.goto(targetUrl, { waitUntil: 'domcontentloaded' });
  await page.evaluate(() => window.localStorage.clear());
  await page.reload({ waitUntil: 'domcontentloaded' });
  await waitForTitle(page);
  await page.screenshot({ path: `${screenshotDir}/rc-title-first-run.png`, fullPage: true });

  const emptySave = await readCampaignSave(page);
  assert(!emptySave.current && !emptySave.slot1, `Expected first run without campaign save: ${JSON.stringify(emptySave)}`);

  await page.mouse.click(962, 240);
  await waitForStoryReady(page);
  await page.screenshot({ path: `${screenshotDir}/rc-new-game-story.png`, fullPage: true });
  await advanceUntilBattle(page, 'first-battle-zhuo-commandery');
  await page.screenshot({ path: `${screenshotDir}/rc-first-battle.png`, fullPage: true });

  const firstBattleProbe = await page.evaluate(() => {
    const scene = window.__HEROS_GAME__?.scene.getScene('BattleScene');
    const state = window.__HEROS_DEBUG__?.battle();
    const sideTexts = textValues(scene?.sidePanelObjects);
    return {
      battleId: state?.battleId,
      objectiveText: scene?.objectiveTrackerText?.text,
      objectiveSubText: scene?.objectiveTrackerSubText?.text,
      sideTexts
    };

    function textValues(objects = []) {
      return objects.filter((object) => object?.type === 'Text').map((object) => object.text);
    }
  });
  assert(firstBattleProbe.battleId === 'first-battle-zhuo-commandery', `Expected first battle: ${JSON.stringify(firstBattleProbe)}`);
  assert(firstBattleProbe.objectiveText?.startsWith('승리 목표:'), `Expected clear victory objective label: ${JSON.stringify(firstBattleProbe)}`);
  assert(firstBattleProbe.objectiveSubText?.includes('패배 조건:'), `Expected clear defeat condition label: ${JSON.stringify(firstBattleProbe)}`);
  assert(firstBattleProbe.objectiveSubText?.includes('진군:'), `Expected tactical route in objective tracker: ${JSON.stringify(firstBattleProbe)}`);
  assert(
    firstBattleProbe.sideTexts.some((text) => text.includes('작전 목표')) &&
      !firstBattleProbe.sideTexts.some((text) => text.includes('...')),
    `Expected opening tactical message without ASCII truncation: ${JSON.stringify(firstBattleProbe.sideTexts)}`
  );

  await page.evaluate(() => window.__HEROS_DEBUG__?.forceBattleOutcome('victory'));
  await waitForBattleOutcome(page, 'victory');
  await page.screenshot({ path: `${screenshotDir}/rc-first-battle-result.png`, fullPage: true });

  const resultProbe = await page.evaluate(() => {
    const scene = window.__HEROS_GAME__?.scene.getScene('BattleScene');
    const state = window.__HEROS_DEBUG__?.battle();
    return {
      outcome: state?.battleOutcome,
      resultTexts: textValues(scene?.resultObjects)
    };

    function textValues(objects = []) {
      return objects.filter((object) => object?.type === 'Text').map((object) => object.text);
    }
  });
  assert(resultProbe.outcome === 'victory', `Expected forced victory result: ${JSON.stringify(resultProbe)}`);
  assert(resultProbe.resultTexts.includes('목표 정산'), `Expected result objective settlement title: ${JSON.stringify(resultProbe.resultTexts)}`);
  assert(resultProbe.resultTexts.some((text) => text.includes('목표 보상')), `Expected reward panel to name objective rewards: ${JSON.stringify(resultProbe.resultTexts)}`);
  assert(!resultProbe.resultTexts.some((text) => text.includes('미달')), `Expected result screen to avoid harsh optional-goal wording: ${JSON.stringify(resultProbe.resultTexts)}`);

  await page.mouse.click(738, 642);
  await waitForCampAfterBattleResult(page);
  await page.screenshot({ path: `${screenshotDir}/rc-first-camp.png`, fullPage: true });

  const firstCampProbe = await page.evaluate(() => {
    const scene = window.__HEROS_GAME__?.scene.getScene('CampScene');
    return {
      state: window.__HEROS_DEBUG__?.camp(),
      summary: scene?.reportSummary?.(),
      texts: textValues(scene?.contentObjects)
    };

    function textValues(objects = []) {
      return objects.filter((object) => object?.type === 'Text').map((object) => object.text);
    }
  });
  assert(firstCampProbe.state?.campaign?.step === 'first-camp', `Expected victory to return to first camp: ${JSON.stringify(firstCampProbe.state)}`);
  assert(firstCampProbe.summary?.includes('보유 군자금'), `Expected camp summary to show held gold: ${JSON.stringify(firstCampProbe)}`);
  assert(firstCampProbe.texts.some((text) => text.includes('전투 보상')), `Expected camp report to show battle reward: ${JSON.stringify(firstCampProbe.texts)}`);

  await seedCampaignSave(page, {
    battleId: 'fifty-eighth-battle-qishan-retreat',
    battleTitle: '기산 후퇴로',
    step: 'fifty-eighth-camp',
    gold: 7400,
    turnNumber: 13,
    defeatedEnemies: 16,
    selectedSortieUnitIds: ['zhuge-liang', 'jiang-wei', 'wang-ping', 'zhao-yun', 'huang-quan', 'ma-liang', 'ma-dai']
  });
  await page.reload({ waitUntil: 'domcontentloaded' });
  await waitForTitle(page);
  await page.mouse.click(962, 310);
  await waitForCamp(page);
  await page.screenshot({ path: `${screenshotDir}/rc-mid-campaign-continue.png`, fullPage: true });

  const midCampState = await page.evaluate(() => window.__HEROS_DEBUG__?.camp());
  assert(midCampState?.campaign?.step === 'fifty-eighth-camp', `Expected mid-campaign save to continue into camp: ${JSON.stringify(midCampState)}`);
  assert(midCampState.campBattleId === 'fifty-eighth-battle-qishan-retreat', `Expected mid-campaign battle id: ${JSON.stringify(midCampState)}`);
  assert(midCampState.sortiePlan?.selectedCount > 0, `Expected mid-campaign formation state: ${JSON.stringify(midCampState?.sortiePlan)}`);

  await seedCampaignSave(page, {
    battleId: 'sixty-sixth-battle-wuzhang-final',
    battleTitle: '오장원 최종전',
    step: 'sixty-sixth-camp',
    gold: 9800,
    turnNumber: 18,
    defeatedEnemies: 20,
    selectedSortieUnitIds: ['zhuge-liang', 'jiang-wei', 'wang-ping', 'ma-dai', 'huang-quan', 'li-yan', 'wei-yan']
  });
  await page.reload({ waitUntil: 'domcontentloaded' });
  await waitForTitle(page);
  await page.mouse.click(962, 310);
  await waitForCamp(page);
  const finalCampState = await page.evaluate(() => window.__HEROS_DEBUG__?.camp());
  assert(finalCampState?.campaign?.step === 'sixty-sixth-camp', `Expected final camp save to continue: ${JSON.stringify(finalCampState)}`);
  await page.screenshot({ path: `${screenshotDir}/rc-final-camp.png`, fullPage: true });

  await page.mouse.click(1160, 38);
  const finalTransitionScenes = await waitForStoryOrEnding(page);
  if (finalTransitionScenes.includes('StoryScene')) {
    await waitForStoryReady(page);
    await advanceStoryUntilEnding(page);
  }
  await waitForEnding(page);
  await page.screenshot({ path: `${screenshotDir}/rc-ending.png`, fullPage: true });

  const endingState = await page.evaluate(() => window.__HEROS_DEBUG__?.scene('EndingScene')?.getDebugState?.());
  assert(endingState?.campaignStep === 'ending-complete', `Expected ending-complete state: ${JSON.stringify(endingState)}`);
  assert(endingState.latestBattleId === 'sixty-sixth-battle-wuzhang-final', `Expected Wuzhang final as latest battle: ${JSON.stringify(endingState)}`);

  await page.keyboard.press('Enter');
  await waitForTitle(page);
  await page.mouse.click(962, 310);
  await waitForEnding(page);
  await page.screenshot({ path: `${screenshotDir}/rc-ending-continue.png`, fullPage: true });

  const endingContinueState = await page.evaluate(() => ({
    activeScenes: window.__HEROS_DEBUG__?.activeScenes() ?? [],
    ending: window.__HEROS_DEBUG__?.scene('EndingScene')?.getDebugState?.()
  }));
  assert(
    endingContinueState.activeScenes.includes('EndingScene') && endingContinueState.ending?.campaignStep === 'ending-complete',
    `Expected title continue to reopen ending: ${JSON.stringify(endingContinueState)}`
  );

  const errors = consoleMessages.filter((message) => message.type === 'error');
  assert(errors.length === 0, `Unexpected browser console errors: ${JSON.stringify(errors)}`);

  console.log(`Verified release-candidate user flow at ${targetUrl}`);
} finally {
  await browser?.close();
  if (serverProcess && !serverProcess.killed) {
    serverProcess.kill();
  }
}

function withDebugParam(url) {
  const parsed = new URL(url);
  parsed.searchParams.set('debug', '1');
  parsed.searchParams.set('renderer', 'canvas');
  return parsed.toString();
}

async function waitForTitle(page) {
  await page.waitForFunction(() => document.querySelector('canvas') !== null, undefined, { timeout: 90000 });
  await page.waitForFunction(() => window.__HEROS_DEBUG__ !== undefined, undefined, { timeout: 90000 });
  await page.waitForFunction(() => {
    const activeScenes = window.__HEROS_DEBUG__?.activeScenes() ?? [];
    return activeScenes.includes('TitleScene');
  }, undefined, { timeout: 90000 });
}

async function waitForStoryReady(page) {
  await page.waitForFunction(() => {
    const activeScenes = window.__HEROS_DEBUG__?.activeScenes() ?? [];
    const story = window.__HEROS_DEBUG__?.scene('StoryScene')?.getDebugState?.();
    return activeScenes.includes('StoryScene') && story?.ready === true;
  }, undefined, { timeout: 90000 });
}

async function waitForStoryOrEnding(page) {
  await page.waitForFunction(() => {
    const activeScenes = window.__HEROS_DEBUG__?.activeScenes() ?? [];
    return activeScenes.includes('StoryScene') || activeScenes.includes('EndingScene');
  }, undefined, { timeout: 30000 });
  return page.evaluate(() => window.__HEROS_DEBUG__?.activeScenes() ?? []);
}

async function advanceUntilBattle(page, battleId) {
  for (let i = 0; i < 48; i += 1) {
    const ready = await page.evaluate((expectedBattleId) => {
      const state = window.__HEROS_DEBUG__?.battle();
      return (
        state?.scene === 'BattleScene' &&
        state?.battleId === expectedBattleId &&
        (state?.phase === 'deployment' || state?.phase === 'idle') &&
        state?.mapBackgroundReady === true
      );
    }, battleId);

    if (ready) {
      await startDeploymentIfNeeded(page, battleId);
      return;
    }

    await page.keyboard.press('Space');
    await page.waitForTimeout(220);
  }

  await waitForBattleReady(page, battleId);
}

async function waitForBattleReady(page, battleId) {
  await page.waitForFunction((expectedBattleId) => {
    const state = window.__HEROS_DEBUG__?.battle();
    return (
      state?.scene === 'BattleScene' &&
      state?.battleId === expectedBattleId &&
      (state?.phase === 'deployment' || state?.phase === 'idle') &&
      state?.mapBackgroundReady === true
    );
  }, battleId, { timeout: 90000 });
  await startDeploymentIfNeeded(page, battleId);
}

async function startDeploymentIfNeeded(page, battleId) {
  const state = await page.evaluate((expectedBattleId) => {
    const battle = window.__HEROS_DEBUG__?.battle();
    return battle?.battleId === expectedBattleId ? battle : undefined;
  }, battleId);
  if (state?.phase !== 'deployment') {
    return;
  }

  assert(state.deployedAllyIds?.length >= 3, `Expected deployment to show the selected ally formation: ${JSON.stringify(state)}`);
  await page.mouse.click(1085, 637);
  await page.waitForFunction((expectedBattleId) => {
    const battle = window.__HEROS_DEBUG__?.battle();
    return battle?.battleId === expectedBattleId && battle?.phase === 'idle' && battle?.triggeredBattleEvents?.includes('opening');
  }, battleId, { timeout: 30000 });
}

async function waitForBattleOutcome(page, outcome) {
  await page.waitForFunction((expectedOutcome) => {
    const state = window.__HEROS_DEBUG__?.battle();
    return state?.battleOutcome === expectedOutcome && state?.phase === 'resolved' && state?.resultVisible === true;
  }, outcome, { timeout: 90000 });
}

async function waitForCamp(page) {
  await page.waitForFunction(() => {
    const activeScenes = window.__HEROS_DEBUG__?.activeScenes() ?? [];
    const scene = window.__HEROS_DEBUG__?.scene('CampScene');
    return (
      activeScenes.includes('CampScene') &&
      window.__HEROS_DEBUG__?.camp()?.scene === 'CampScene' &&
      (scene?.contentObjects?.length ?? 0) > 0
    );
  }, undefined, { timeout: 90000 });
}

async function waitForCampAfterBattleResult(page) {
  await page.waitForFunction(() => {
    const activeScenes = window.__HEROS_DEBUG__?.activeScenes() ?? [];
    return activeScenes.includes('CampScene') || activeScenes.includes('StoryScene');
  }, undefined, { timeout: 90000 });

  for (let i = 0; i < 48; i += 1) {
    const activeScenes = await page.evaluate(() => window.__HEROS_DEBUG__?.activeScenes() ?? []);
    if (activeScenes.includes('CampScene')) {
      await waitForCamp(page);
      return;
    }
    await page.keyboard.press('Space');
    await page.waitForTimeout(240);
  }

  await waitForCamp(page);
}

async function advanceStoryUntilEnding(page) {
  for (let i = 0; i < 48; i += 1) {
    const activeScenes = await page.evaluate(() => window.__HEROS_DEBUG__?.activeScenes() ?? []);
    if (activeScenes.includes('EndingScene')) {
      return;
    }

    await page.keyboard.press('Space');
    await page.waitForTimeout(240);
  }
}

async function waitForEnding(page) {
  await page.waitForFunction(() => {
    const activeScenes = window.__HEROS_DEBUG__?.activeScenes() ?? [];
    const ending = window.__HEROS_DEBUG__?.scene('EndingScene')?.getDebugState?.();
    return activeScenes.includes('EndingScene') && ending?.ready === true && ending?.campaignStep === 'ending-complete';
  }, undefined, { timeout: 90000 });
}

async function readCampaignSave(page) {
  return page.evaluate(() => {
    const read = (key) => {
      const raw = window.localStorage.getItem(key);
      return raw ? JSON.parse(raw) : undefined;
    };
    return {
      current: read('heros-web:campaign-state'),
      slot1: read('heros-web:campaign-state:slot-1')
    };
  });
}

async function seedCampaignSave(page, options) {
  await page.evaluate((seed) => {
    const storageKey = 'heros-web:campaign-state';
    const current = JSON.parse(window.localStorage.getItem(storageKey) ?? 'null');
    if (!current?.firstBattleReport) {
      throw new Error('Expected an existing campaign report before seeding RC save.');
    }

    const now = new Date().toISOString();
    const objectives = [
      { id: 'leader', label: '지휘관 격파', achieved: true, status: 'done', detail: '전장 목표 완료', rewardGold: 420 },
      { id: 'survive', label: '본대 보존', achieved: true, status: 'done', detail: '핵심 장수 생존', rewardGold: 260 },
      { id: 'supply', label: '보급선 유지', achieved: true, status: 'done', detail: '수레와 군량 확보', rewardGold: 220 },
      { id: 'quick', label: '빠른 정리', achieved: false, status: 'failed', detail: `${seed.turnNumber}/12턴`, rewardGold: 180 }
    ];
    const units = current.roster?.length ? current.roster : current.firstBattleReport.units;
    const bonds = current.bonds?.length ? current.bonds : current.firstBattleReport.bonds;
    const report = {
      ...current.firstBattleReport,
      battleId: seed.battleId,
      battleTitle: seed.battleTitle,
      outcome: 'victory',
      turnNumber: seed.turnNumber,
      rewardGold: 1080,
      defeatedEnemies: seed.defeatedEnemies,
      totalEnemies: seed.defeatedEnemies,
      objectives,
      units,
      bonds,
      mvp: current.firstBattleReport.mvp ?? { unitId: 'zhuge-liang', name: '제갈량', damageDealt: 320, defeats: 2 },
      itemRewards: ['상처약 2', '탁주 1'],
      completedCampDialogues: current.completedCampDialogues ?? [],
      completedCampVisits: current.completedCampVisits ?? [],
      createdAt: now
    };
    const settlement = {
      battleId: report.battleId,
      battleTitle: report.battleTitle,
      outcome: 'victory',
      rewardGold: report.rewardGold,
      itemRewards: report.itemRewards,
      objectives,
      units: units.map((unit) => ({
        unitId: unit.id,
        name: unit.name,
        level: unit.level ?? 1,
        exp: unit.exp ?? 0,
        hp: unit.hp ?? unit.maxHp ?? 1,
        maxHp: unit.maxHp ?? 1,
        equipment: unit.equipment
      })),
      bonds: bonds.map((bond) => ({
        id: bond.id,
        title: bond.title,
        level: bond.level ?? 1,
        exp: bond.exp ?? 0,
        battleExp: bond.battleExp ?? 0
      })),
      reserveTraining: [],
      completedAt: now
    };
    const next = {
      ...current,
      updatedAt: now,
      step: seed.step,
      activeSaveSlot: 1,
      gold: seed.gold,
      inventory: { ...(current.inventory ?? {}), 콩: 12, 상처약: 6, 탁주: 4 },
      selectedSortieUnitIds: seed.selectedSortieUnitIds,
      latestBattleId: seed.battleId,
      firstBattleReport: report,
      battleHistory: {
        ...(current.battleHistory ?? {}),
        [seed.battleId]: settlement
      }
    };

    window.localStorage.setItem(storageKey, JSON.stringify(next));
    window.localStorage.setItem(`${storageKey}:slot-1`, JSON.stringify(next));
  }, options);
}

async function ensurePreviewServer(url) {
  if (await canReach(url)) {
    return undefined;
  }

  const parsed = new URL(url);
  const isLocal = ['localhost', '127.0.0.1', '0.0.0.0'].includes(parsed.hostname);
  if (!isLocal) {
    throw new Error(`No server responded at ${url}`);
  }

  const stderr = [];
  const child = spawn(process.execPath, ['node_modules/vite/bin/vite.js', 'preview', '--host', '127.0.0.1', '--port', parsed.port || '4173'], {
    cwd: process.cwd(),
    env: process.env,
    stdio: ['ignore', 'pipe', 'pipe']
  });

  child.stderr.on('data', (chunk) => stderr.push(chunk.toString()));
  child.stdout.on('data', () => {});

  for (let i = 0; i < 120; i += 1) {
    if (await canReach(url)) {
      return child;
    }
    await delay(250);
  }

  child.kill();
  throw new Error(`Vite preview did not start at ${url}\n${stderr.join('')}`);
}

async function canReach(url) {
  try {
    const response = await fetch(url, { signal: AbortSignal.timeout(1000) });
    return response.ok;
  } catch {
    return false;
  }
}

function delay(ms) {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

function assert(condition, message) {
  if (!condition) {
    throw new Error(message);
  }
}

function runCommand(command, args, env = {}) {
  const result = spawnSync(command, args, { cwd: process.cwd(), env: { ...process.env, ...env }, stdio: 'inherit' });
  if (result.status !== 0) {
    throw new Error(`Command failed: ${command} ${args.join(' ')}`);
  }
}