import { test, expect, type Page } from '@playwright/test';

test.use({
  baseURL: 'http://localhost:3000/',
});

// ─── Helpers ─────────────────────────────────────────────────────────────────

async function waitForMs(page: Page, ms: number) {
  await page.waitForTimeout(ms);
}

async function startFreshGame(page: Page) {
  await page.goto('/');
  await page.evaluate(() => localStorage.clear());
  await page.reload();
  await page.waitForLoadState('networkidle');
  await waitForMs(page, 3000);
}

async function clickTab(page: Page, label: string) {
  const tab = page.getByRole('tab', { name: new RegExp(label, 'i') }).first();
  await tab.click();
  await waitForMs(page, 400);
}

async function clickBtn(page: Page, text: string) {
  const btn = page.getByRole('button', { name: new RegExp(text, 'i') }).first();
  await btn.click();
  await waitForMs(page, 200);
}

async function waitForBridge(page: Page) {
  for (let attempt = 0; attempt < 30; attempt++) {
    const ready = await page.evaluate(() => !!(window as any).__TEST__);
    if (ready) return;
    await waitForMs(page, 1000);
  }
  throw new Error('Debug bridge (window.__TEST__) not available after 30s');
}

// ─── Test ─────────────────────────────────────────────────────────────────────

test.describe('Combat Happy-Path: Spire Climb → Combat → Mana Recovery → Exit', () => {

  test('climb spire, fight until mana drains, gather mana to recover, descend, exit', async ({ page }) => {
    test.setTimeout(600_000);

    const errors: string[] = [];
    page.on('console', (msg) => {
      if (msg.type() === 'error') errors.push(msg.text());
    });

    // ══════════════════════════════════════════════════════════════════════════
    // STEP 1: Start fresh game and wait for bridge
    // ══════════════════════════════════════════════════════════════════════════
    console.log('[TEST] Step 1: Starting fresh game...');
    await startFreshGame(page);
    await waitForMs(page, 1500);
    await waitForBridge(page);
    console.log('[TEST] Bridge ready!');

    // ══════════════════════════════════════════════════════════════════════════
    // STEP 2: Set up prerequisites via Debug tab
    // ══════════════════════════════════════════════════════════════════════════
    console.log('[TEST] Step 2: Setting up prerequisites...');
    await clickTab(page, 'debug');
    await waitForMs(page, 500);

    // ── 2a. Unlock all elements ──────────────────────────────────────────────
    console.log('[TEST] 2a. Unlocking all elements...');
    const elementsHeader = page.locator('button', { hasText: /^Elements$/ }).first();
    if (await elementsHeader.isVisible({ timeout: 3000 })) {
      await elementsHeader.click();
      await waitForMs(page, 300);
    }
    await clickBtn(page, 'Unlock All Elements');
    await waitForMs(page, 500);

    // ── 2b. Boost max mana via Raw Mana Mastery discipline XP ────────────────
    console.log('[TEST] 2b. Boosting max mana via Raw Mana Mastery XP...');
    await page.evaluate(() => {
      const disc = (window as any).__TEST__.useDisciplineStore;
      if (!disc) return;
      const state = disc.getState();
      const existing = state.disciplines['raw-mastery'];
      const newXP = (existing?.xp || 0) + 20000;
      disc.setState({
        disciplines: {
          ...state.disciplines,
          'raw-mastery': { id: 'raw-mastery', xp: newXP, paused: false },
        },
        totalXP: state.totalXP + 20000,
        concurrentLimit: Math.max(
          state.concurrentLimit,
          Math.min(4 + Math.floor((state.totalXP + 20000) / 500), 7),
        ),
      });
    });
    await waitForMs(page, 300);

    const rawMasteryXP = await page.evaluate(() =>
      (window as any).__TEST__.useDisciplineStore.getState().disciplines?.['raw-mastery']?.xp || 0
    );
    console.log(`[TEST] Raw Mana Mastery XP: ${rawMasteryXP}`);
    expect(rawMasteryXP).toBe(20000);

    // ── 2c. Fill mana to max ─────────────────────────────────────────────────
    console.log('[TEST] 2c. Filling mana to max...');
    await clickBtn(page, 'Fill Mana');
    await waitForMs(page, 500);

    const manaAfterFill = await page.evaluate(() =>
      (window as any).__TEST__.useManaStore.getState().rawMana
    );
    console.log(`[TEST] Raw mana after fill: ${manaAfterFill}`);
    expect(manaAfterFill).toBeGreaterThan(0);

    // ══════════════════════════════════════════════════════════════════════════
    // STEP 3: Enter the Spire via "Climb the Spire" button
    // ══════════════════════════════════════════════════════════════════════════
    console.log('[TEST] Step 3: Entering the Spire...');
    await clickTab(page, 'spells');
    await waitForMs(page, 500);

    const climbBtn = page.getByRole('button', { name: /climb the spire/i }).first();
    await expect(climbBtn).toBeVisible({ timeout: 10000 });
    await climbBtn.click();
    await waitForMs(page, 2000);

    // Verify SpireCombatPage is showing
    await expect(page.getByText('Floor 1').first()).toBeVisible({ timeout: 10000 });
    console.log('[TEST] Spire combat page loaded!');

    // ══════════════════════════════════════════════════════════════════════════
    // STEP 4: Stay in combat — let the game auto-tick and fight
    // manaBolt costs 3 raw mana per cast, deals 5 damage.
    // Floor 1 HP = 151, so ~31 casts to clear = ~258 seconds.
    // We let it fight for 120 seconds to clear several floors.
    // ══════════════════════════════════════════════════════════════════════════
    console.log('[TEST] Step 4: Fighting in the Spire...');

    const startMana = await page.evaluate(() =>
      (window as any).__TEST__.useManaStore.getState().rawMana
    );
    const startFloor = await page.evaluate(() =>
      (window as any).__TEST__.useCombatStore.getState().currentFloor
    );
    console.log(`[TEST] Starting: Floor ${startFloor}, Mana ${startMana}`);

    console.log('[TEST] Letting combat run for 120 seconds...');
    await waitForMs(page, 120000);

    const floorAfterCombat = await page.evaluate(() =>
      (window as any).__TEST__.useCombatStore.getState().currentFloor
    );
    const manaAfterCombat = await page.evaluate(() =>
      (window as any).__TEST__.useManaStore.getState().rawMana
    );
    console.log(`[TEST] After combat: Floor ${floorAfterCombat}, Mana ${manaAfterCombat}`);
    expect(floorAfterCombat).toBeGreaterThan(startFloor);

    // ══════════════════════════════════════════════════════════════════════════
    // STEP 5: Exit the Spire to access the Gather button on the main page
    // The Gather button (ManaDisplay) is in the LeftPanel which is only
    // rendered on the main game page, not in the SpireCombatPage view.
    // We exit spire, gather mana, then re-enter.
    // ══════════════════════════════════════════════════════════════════════════
    console.log('[TEST] Step 5: Exiting spire to gather mana...');

    // First descend to floor 1 (Exit Spire button only shows on floor 1)
    for (let i = 0; i < 200; i++) {
      const floorNow = await page.evaluate(() =>
        (window as any).__TEST__.useCombatStore.getState().currentFloor
      );
      if (floorNow <= 1) break;

      const climbDownBtn = page.getByRole('button', { name: /climb down/i }).first();
      const btnVisible = await climbDownBtn.isVisible({ timeout: 2000 }).catch(() => false);
      if (btnVisible) {
        await climbDownBtn.click();
        await waitForMs(page, 500);
      } else {
        break;
      }
    }

    // Click Exit Spire button (visible on floor 1)
    const exitBtn = page.getByRole('button', { name: /exit spire/i }).first();
    await expect(exitBtn).toBeVisible({ timeout: 10000 });
    await exitBtn.click();
    await waitForMs(page, 2000);

    const spireModeAfterExit = await page.evaluate(() =>
      (window as any).__TEST__.useCombatStore.getState().spireMode
    );
    expect(spireModeAfterExit).toBe(false);
    console.log('[TEST] Exited spire, back on main page');

    // ══════════════════════════════════════════════════════════════════════════
    // STEP 6: Hold "Gather +X Mana" button to recover mana quickly
    // The Gather button is in the LeftPanel's ManaDisplay component.
    // Holding it fires gatherMana() via requestAnimationFrame loop.
    // ══════════════════════════════════════════════════════════════════════════
    console.log('[TEST] Step 6: Holding Gather button to recover mana...');

    const gatherBtn = page.getByRole('button', { name: /gather.*mana/i }).first();
    await expect(gatherBtn).toBeVisible({ timeout: 10000 });

    const manaBeforeGather = await page.evaluate(() =>
      (window as any).__TEST__.useManaStore.getState().rawMana
    );
    console.log(`[TEST] Mana before gather: ${manaBeforeGather}`);

    // Hold the gather button for 10 seconds
    await gatherBtn.hover();
    await page.mouse.down();
    await waitForMs(page, 10000);
    await page.mouse.up();
    console.log('[TEST] Released Gather button.');

    const manaAfterGather = await page.evaluate(() =>
      (window as any).__TEST__.useManaStore.getState().rawMana
    );
    console.log(`[TEST] Mana after gathering: ${manaAfterGather}`);
    expect(manaAfterGather).toBeGreaterThanOrEqual(manaBeforeGather);

    // ══════════════════════════════════════════════════════════════════════════
    // STEP 7: Re-enter the Spire and continue fighting with recovered mana
    // ══════════════════════════════════════════════════════════════════════════
    console.log('[TEST] Step 7: Re-entering the Spire with recovered mana...');

    await clickTab(page, 'spells');
    await waitForMs(page, 500);

    const climbBtn2 = page.getByRole('button', { name: /climb the spire/i }).first();
    await expect(climbBtn2).toBeVisible({ timeout: 10000 });
    await climbBtn2.click();
    await waitForMs(page, 2000);

    await expect(page.getByText('Floor 1').first()).toBeVisible({ timeout: 10000 });
    console.log('[TEST] Re-entered spire!');

    // Let combat continue
    console.log('[TEST] Letting combat run for 60 more seconds...');
    await waitForMs(page, 60000);

    const floorAfterMoreCombat = await page.evaluate(() =>
      (window as any).__TEST__.useCombatStore.getState().currentFloor
    );
    console.log(`[TEST] After more combat: Floor ${floorAfterMoreCombat}`);

    // ══════════════════════════════════════════════════════════════════════════
    // STEP 8: Descend the spire back to floor 1
    // ══════════════════════════════════════════════════════════════════════════
    console.log('[TEST] Step 8: Descending to floor 1...');

    for (let i = 0; i < 200; i++) {
      const floorNow = await page.evaluate(() =>
        (window as any).__TEST__.useCombatStore.getState().currentFloor
      );
      if (floorNow <= 1) break;

      const climbDownBtn = page.getByRole('button', { name: /climb down/i }).first();
      const btnVisible = await climbDownBtn.isVisible({ timeout: 2000 }).catch(() => false);
      if (btnVisible) {
        await climbDownBtn.click();
        await waitForMs(page, 500);
      } else {
        break;
      }
    }

    const floorAfterDescend = await page.evaluate(() =>
      (window as any).__TEST__.useCombatStore.getState().currentFloor
    );
    console.log(`[TEST] Floor after descending: ${floorAfterDescend}`);
    expect(floorAfterDescend).toBe(1);

    // ══════════════════════════════════════════════════════════════════════════
    // STEP 9: Exit the Spire
    // ══════════════════════════════════════════════════════════════════════════
    console.log('[TEST] Step 9: Exiting the Spire...');

    const exitBtn2 = page.getByRole('button', { name: /exit spire/i }).first();
    await expect(exitBtn2).toBeVisible({ timeout: 10000 });
    await exitBtn2.click();
    await waitForMs(page, 2000);

    const spireModeFinal = await page.evaluate(() =>
      (window as any).__TEST__.useCombatStore.getState().spireMode
    );
    expect(spireModeFinal).toBe(false);

    // Verify we are back on the main game page
    await expect(page.getByRole('tab', { name: /spells/i }).first()).toBeVisible({ timeout: 10000 });
    console.log('[TEST] Back on main game page!');

    // ══════════════════════════════════════════════════════════════════════════
    // STEP 10: Verify final state
    // ══════════════════════════════════════════════════════════════════════════
    console.log('[TEST] Step 10: Verifying final state...');

    const maxFloorReached = await page.evaluate(() =>
      (window as any).__TEST__.useCombatStore.getState().maxFloorReached
    );
    const gameOver = await page.evaluate(() =>
      (window as any).__TEST__.useUIStore.getState().gameOver
    );

    console.log(`[TEST] MaxFloorReached: ${maxFloorReached}, GameOver: ${gameOver}`);
    expect(maxFloorReached).toBeGreaterThanOrEqual(1);
    expect(gameOver).toBe(false);

    // No React errors throughout the test
    await waitForMs(page, 1000);
    const reactErrors = errors.filter(e =>
      e.includes('React') || e.includes('Minified') || e.includes('Error #')
      || e.includes('Maximum update depth')
    );
    expect(reactErrors, `React errors: ${JSON.stringify(reactErrors)}`).toHaveLength(0);

    console.log('[TEST] ✅ Combat happy-path test passed!');
  });
});