import { test, expect } from '@playwright/test';
import { execSync } from 'child_process';
import { join, dirname } from 'path';
import { fileURLToPath } from 'url';

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);

const baseUrl = process.env.PLAYWRIGHT_BASE_URL || 'http://localhost:4173';
const urlMatch = baseUrl.match(/:(\d+)$/);
const PORT = urlMatch ? urlMatch[1] : '4173';
const ALPHA_URL = `http://ecole-alpha.classeo.local:${PORT}`;

const ADMIN_EMAIL = 'e2e-replacements-admin@example.com';
const ADMIN_PASSWORD = 'ReplacementsTest123';
const TENANT_ID = 'a1b2c3d4-e5f6-7890-abcd-ef1234567890';

const projectRoot = join(__dirname, '../..');
const composeFile = join(projectRoot, 'compose.yaml');

function runCommand(sql: string) {
	execSync(
		`docker compose -f "${composeFile}" exec -T php php bin/console dbal:run-sql "${sql}" 2>&1`,
		{ encoding: 'utf-8' }
	);
}

function clearCache() {
	try {
		execSync(
			`docker compose -f "${composeFile}" exec -T php php bin/console cache:pool:clear paginated_queries.cache 2>&1`,
			{ encoding: 'utf-8' }
		);
	} catch {
		// Cache pool may not exist in all environments
	}
}

function resolveDeterministicIds(): { schoolId: string; academicYearId: string } {
	const output = execSync(
		`docker compose -f "${composeFile}" exec -T php php -r '` +
			`require "/app/vendor/autoload.php"; ` +
			`$t="${TENANT_ID}"; $ns="6ba7b814-9dad-11d1-80b4-00c04fd430c8"; ` +
			`echo Ramsey\\Uuid\\Uuid::uuid5($ns,"school-$t")->toString()."\\n"; ` +
			`$m=(int)date("n"); $s=$m>=9?(int)date("Y"):(int)date("Y")-1; $e=$s+1; ` +
			`echo Ramsey\\Uuid\\Uuid::uuid5($ns,"$t:$s-$e")->toString();` +
			`' 2>&1`,
		{ encoding: 'utf-8' }
	).trim();
	const [schoolId, academicYearId] = output.split('\n');
	return { schoolId, academicYearId };
}

async function loginAsAdmin(page: import('@playwright/test').Page) {
	await page.goto(`${ALPHA_URL}/login`);
	await page.waitForLoadState('networkidle');
	await page.locator('#email').fill(ADMIN_EMAIL);
	await page.locator('#password').fill(ADMIN_PASSWORD);
	await Promise.all([
		page.waitForURL(/\/dashboard/, { timeout: 60000 }),
		page.getByRole('button', { name: /se connecter/i }).click()
	]);
}

async function waitForPageReady(page: import('@playwright/test').Page) {
	await expect(
		page.getByRole('heading', { name: /remplacements enseignants/i })
	).toBeVisible({ timeout: 15000 });
	await expect(
		page.locator('.empty-state, .replacements-table, .alert-error')
	).toBeVisible({ timeout: 15000 });
}

async function openCreateDialog(page: import('@playwright/test').Page) {
	const button = page.getByRole('button', { name: /nouveau remplacement/i }).first();
	await expect(button).toBeEnabled();
	await button.click();
	await expect(page.getByRole('dialog')).toBeVisible({ timeout: 10000 });

	// Wait for dropdown options to load (more than just the placeholder)
	await expect(page.locator('#replaced-teacher option')).not.toHaveCount(1, { timeout: 10000 });
}

function getTodayDate(): string {
	return new Date().toISOString().split('T')[0];
}

function getFutureDate(days: number): string {
	const date = new Date();
	date.setDate(date.getDate() + days);
	return date.toISOString().split('T')[0];
}

test.describe('Teacher Replacements (Story 2.9)', () => {
	test.beforeAll(async () => {
		execSync(
			`docker compose -f "${composeFile}" exec -T php php bin/console app:dev:create-test-user --tenant=ecole-alpha --email=${ADMIN_EMAIL} --password=${ADMIN_PASSWORD} --role=ROLE_ADMIN 2>&1`,
			{ encoding: 'utf-8' }
		);

		execSync(
			`docker compose -f "${composeFile}" exec -T php php bin/console app:dev:create-test-user --tenant=ecole-alpha --email=e2e-replaced-teacher@example.com --password=TeacherTest123 --role=ROLE_PROF 2>&1`,
			{ encoding: 'utf-8' }
		);

		execSync(
			`docker compose -f "${composeFile}" exec -T php php bin/console app:dev:create-test-user --tenant=ecole-alpha --email=e2e-replacement-teacher@example.com --password=TeacherTest123 --role=ROLE_PROF 2>&1`,
			{ encoding: 'utf-8' }
		);

		const { schoolId, academicYearId } = resolveDeterministicIds();

		runCommand(
			`INSERT INTO school_classes (id, tenant_id, school_id, academic_year_id, name, level, status, created_at, updated_at) VALUES (gen_random_uuid(), '${TENANT_ID}', '${schoolId}', '${academicYearId}', 'E2E-Repl-6B', '6ème', 'active', NOW(), NOW()) ON CONFLICT DO NOTHING`
		);

		runCommand(
			`INSERT INTO subjects (id, tenant_id, school_id, name, code, status, created_at, updated_at) VALUES (gen_random_uuid(), '${TENANT_ID}', '${schoolId}', 'E2E-Repl-Français', 'E2EFRA', 'active', NOW(), NOW()) ON CONFLICT DO NOTHING`
		);

		clearCache();
	});

	test.beforeEach(async () => {
		try {
			runCommand(`DELETE FROM replacement_classes WHERE replacement_id IN (SELECT id FROM teacher_replacements WHERE tenant_id = '${TENANT_ID}')`);
			runCommand(`DELETE FROM teacher_replacements WHERE tenant_id = '${TENANT_ID}'`);
		} catch {
			// Tables may not exist yet if migration hasn't run
		}

		// Re-ensure class and subject exist (may have been deleted by parallel specs)
		const { schoolId, academicYearId } = resolveDeterministicIds();
		try {
			runCommand(
				`INSERT INTO school_classes (id, tenant_id, school_id, academic_year_id, name, level, status, created_at, updated_at) VALUES (gen_random_uuid(), '${TENANT_ID}', '${schoolId}', '${academicYearId}', 'E2E-Repl-6B', '6ème', 'active', NOW(), NOW()) ON CONFLICT DO NOTHING`
			);
			runCommand(
				`INSERT INTO subjects (id, tenant_id, school_id, name, code, status, created_at, updated_at) VALUES (gen_random_uuid(), '${TENANT_ID}', '${schoolId}', 'E2E-Repl-Français', 'E2EFRA', 'active', NOW(), NOW()) ON CONFLICT DO NOTHING`
			);
		} catch {
			// Ignore if already exists
		}

		clearCache();
	});

	// ============================================================================
	// Navigation
	// ============================================================================
	test.describe('Navigation', () => {
		test('replacements link appears in admin navigation', async ({ page }) => {
			await loginAsAdmin(page);
			await page.goto(`${ALPHA_URL}/admin`);

			// Hover "Organisation" category to reveal dropdown
			const nav = page.locator('.desktop-nav');
			await nav.getByRole('button', { name: /organisation/i }).hover();
			const navLink = nav.getByRole('menuitem', { name: /remplacements/i });
			await expect(navLink).toBeVisible({ timeout: 15000 });
		});

		test('can navigate to replacements page', async ({ page }) => {
			await loginAsAdmin(page);
			await page.goto(`${ALPHA_URL}/admin/replacements`);

			await expect(page.getByRole('heading', { name: /remplacements enseignants/i })).toBeVisible({ timeout: 15000 });
		});
	});

	// ============================================================================
	// Empty State
	// ============================================================================
	test.describe('Empty State', () => {
		test('shows empty state when no replacements exist', async ({ page }) => {
			await loginAsAdmin(page);
			await page.goto(`${ALPHA_URL}/admin/replacements`);

			await waitForPageReady(page);
			await expect(page.getByText(/aucun remplacement actif/i)).toBeVisible({ timeout: 10000 });
		});
	});

	// ============================================================================
	// AC1: Create Replacement
	// ============================================================================
	test.describe('AC1: Create Replacement', () => {
		test('can create a new replacement', async ({ page }) => {
			await loginAsAdmin(page);
			await page.goto(`${ALPHA_URL}/admin/replacements`);
			await waitForPageReady(page);

			await openCreateDialog(page);

			// Select replaced teacher
			const replacedSelect = page.locator('#replaced-teacher');
			await expect(replacedSelect).toBeVisible();
			await replacedSelect.selectOption({ index: 1 });

			// Select replacement teacher (different from replaced)
			// Index 0 = placeholder, index 1 = same teacher (disabled), index 2 = next available
			const replacementSelect = page.locator('#replacement-teacher');
			await expect(replacementSelect).toBeVisible();
			await replacementSelect.selectOption({ index: 2 });

			// Set dates
			await page.locator('#start-date').fill(getTodayDate());
			await page.locator('#end-date').fill(getFutureDate(30));

			// Select class and subject
			const firstClassSelect = page.locator('.class-pair-row select').first();
			await firstClassSelect.selectOption({ index: 1 });
			const firstSubjectSelect = page.locator('.class-pair-row select').nth(1);
			await firstSubjectSelect.selectOption({ index: 1 });

			// Submit
			await page.getByRole('button', { name: /désigner le remplaçant/i }).click();

			await expect(page.getByRole('dialog')).not.toBeVisible({ timeout: 10000 });
			await expect(page.getByText(/remplacement créé/i)).toBeVisible({ timeout: 10000 });

			// Verify table shows the replacement
			const table = page.locator('.replacements-table');
			await expect(table).toBeVisible({ timeout: 10000 });
			const rows = table.locator('tbody tr');
			const rowCount = await rows.count();
			expect(rowCount).toBeGreaterThanOrEqual(1);
		});

		test('cancel closes the modal without creating', async ({ page }) => {
			await loginAsAdmin(page);
			await page.goto(`${ALPHA_URL}/admin/replacements`);
			await waitForPageReady(page);

			await openCreateDialog(page);

			await page.getByRole('button', { name: /annuler/i }).click();
			await expect(page.getByRole('dialog')).not.toBeVisible({ timeout: 5000 });
		});
	});

	// ============================================================================
	// AC3: End Replacement
	// ============================================================================
	test.describe('AC3: End Replacement', () => {
		test('can end an active replacement', async ({ page }) => {
			await loginAsAdmin(page);
			await page.goto(`${ALPHA_URL}/admin/replacements`);
			await waitForPageReady(page);

			// First create a replacement
			await openCreateDialog(page);
			await page.locator('#replaced-teacher').selectOption({ index: 1 });
			await page.locator('#replacement-teacher').selectOption({ index: 2 });
			await page.locator('#start-date').fill(getTodayDate());
			await page.locator('#end-date').fill(getFutureDate(30));
			const firstClassSelect = page.locator('.class-pair-row select').first();
			await firstClassSelect.selectOption({ index: 1 });
			const firstSubjectSelect = page.locator('.class-pair-row select').nth(1);
			await firstSubjectSelect.selectOption({ index: 1 });
			await page.getByRole('button', { name: /désigner le remplaçant/i }).click();
			await expect(page.getByRole('dialog')).not.toBeVisible({ timeout: 10000 });

			// Now end it
			const endButton = page.locator('.btn-remove').first();
			await endButton.click();

			const confirmDialog = page.getByRole('alertdialog');
			await expect(confirmDialog).toBeVisible({ timeout: 5000 });
			await expect(page.getByText(/perdra immédiatement l'accès/i)).toBeVisible();

			await confirmDialog.getByRole('button', { name: /terminer/i }).click();

			await expect(confirmDialog).not.toBeVisible({ timeout: 15000 });
			await expect(page.getByText(/remplacement terminé/i)).toBeVisible({ timeout: 15000 });
		});
	});

	// ============================================================================
	// AC4: Active Replacements Display
	// ============================================================================
	test.describe('AC4: Active Replacements Display', () => {
		test('shows countdown for active replacements', async ({ page }) => {
			await loginAsAdmin(page);
			await page.goto(`${ALPHA_URL}/admin/replacements`);
			await waitForPageReady(page);

			// Create a replacement
			await openCreateDialog(page);
			await page.locator('#replaced-teacher').selectOption({ index: 1 });
			await page.locator('#replacement-teacher').selectOption({ index: 2 });
			await page.locator('#start-date').fill(getTodayDate());
			await page.locator('#end-date').fill(getFutureDate(10));
			const firstClassSelect = page.locator('.class-pair-row select').first();
			await firstClassSelect.selectOption({ index: 1 });
			const firstSubjectSelect = page.locator('.class-pair-row select').nth(1);
			await firstSubjectSelect.selectOption({ index: 1 });
			await page.getByRole('button', { name: /désigner le remplaçant/i }).click();
			await expect(page.getByRole('dialog')).not.toBeVisible({ timeout: 10000 });

			// Verify countdown is displayed
			await expect(page.locator('.countdown')).toBeVisible({ timeout: 10000 });
			await expect(page.getByText(/jours? restants?/i)).toBeVisible();

			// Verify status badge
			await expect(page.locator('.status-active')).toBeVisible();
		});
	});
});