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 TEACHER_EMAIL = 'e2e-rules-warn-teacher@example.com';
const TEACHER_PASSWORD = 'RulesWarn123';
const TENANT_ID = 'a1b2c3d4-e5f6-7890-abcd-ef1234567890';

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

function runSql(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
	}
}

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: schoolId!, academicYearId: academicYearId! };
}

/**
 * Returns a weekday date string (YYYY-MM-DD), N days from now.
 * Skips weekends.
 */
function getNextWeekday(daysFromNow: number): string {
	const date = new Date();
	date.setDate(date.getDate() + daysFromNow);
	const day = date.getDay();
	if (day === 0) date.setDate(date.getDate() + 1);
	if (day === 6) date.setDate(date.getDate() + 2);
	const y = date.getFullYear();
	const m = String(date.getMonth() + 1).padStart(2, '0');
	const d = String(date.getDate()).padStart(2, '0');
	return `${y}-${m}-${d}`;
}

async function loginAsTeacher(page: import('@playwright/test').Page) {
	await page.goto(`${ALPHA_URL}/login`);
	await page.locator('#email').fill(TEACHER_EMAIL);
	await page.locator('#password').fill(TEACHER_PASSWORD);
	await Promise.all([
		page.waitForURL(/\/dashboard/, { timeout: 30000 }),
		page.getByRole('button', { name: /se connecter/i }).click(),
	]);
}

async function navigateToHomework(page: import('@playwright/test').Page) {
	await page.goto(`${ALPHA_URL}/dashboard/teacher/homework`);
	await expect(page.getByRole('heading', { name: /mes devoirs/i })).toBeVisible({ timeout: 15000 });
}

function seedTeacherAssignments() {
	const { academicYearId } = resolveDeterministicIds();
	try {
		runSql(
			`INSERT INTO teacher_assignments (id, tenant_id, teacher_id, school_class_id, subject_id, academic_year_id, status, start_date, created_at, updated_at) ` +
				`SELECT gen_random_uuid(), '${TENANT_ID}', u.id, c.id, s.id, '${academicYearId}', 'active', NOW(), NOW(), NOW() ` +
				`FROM users u CROSS JOIN school_classes c CROSS JOIN subjects s ` +
				`WHERE u.email = '${TEACHER_EMAIL}' AND u.tenant_id = '${TENANT_ID}' ` +
				`AND c.tenant_id = '${TENANT_ID}' ` +
				`AND s.tenant_id = '${TENANT_ID}' ` +
				`ON CONFLICT DO NOTHING`,
		);
	} catch {
		// Table may not exist
	}
}

/**
 * Configure homework rules with minimum_delay of 7 days in soft mode
 * so that a homework due in 1-2 days triggers a warning.
 */
function seedSoftRules() {
	// Use escaped quotes for JSON inside double-quoted shell command
	const rulesJson = '[{\\"type\\":\\"minimum_delay\\",\\"params\\":{\\"days\\":7}}]';
	runSql(
		`INSERT INTO homework_rules (id, tenant_id, rules, enforcement_mode, enabled, created_at, updated_at) ` +
			`VALUES (gen_random_uuid(), '${TENANT_ID}', '${rulesJson}'::jsonb, 'soft', true, NOW(), NOW()) ` +
			`ON CONFLICT (tenant_id) DO UPDATE SET rules = '${rulesJson}'::jsonb, enforcement_mode = 'soft', enabled = true, updated_at = NOW()`,
	);
}

function clearRules() {
	try {
		runSql(`DELETE FROM homework_rules WHERE tenant_id = '${TENANT_ID}'`);
	} catch {
		// Table may not exist
	}
}

test.describe('Homework Rules - Soft Warning (Story 5.4)', () => {
	test.beforeAll(async () => {
		// Create teacher user
		execSync(
			`docker compose -f "${composeFile}" exec -T php php bin/console app:dev:create-test-user --tenant=ecole-alpha --email=${TEACHER_EMAIL} --password=${TEACHER_PASSWORD} --role=ROLE_PROF 2>&1`,
			{ encoding: 'utf-8' },
		);

		const { schoolId, academicYearId } = resolveDeterministicIds();
		try {
			runSql(
				`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}', '${academicYearId}', 'E2E-RW-6A', '6ème', 'active', NOW(), NOW()) ON CONFLICT DO NOTHING`,
			);
			runSql(
				`INSERT INTO subjects (id, tenant_id, school_id, name, code, status, created_at, updated_at) ` +
					`VALUES (gen_random_uuid(), '${TENANT_ID}', '${schoolId}', 'E2E-RW-Maths', 'E2ERWM', 'active', NOW(), NOW()) ON CONFLICT DO NOTHING`,
			);
		} catch {
			// May already exist
		}

		seedTeacherAssignments();
	});

	test.beforeEach(async () => {
		try {
			runSql(
				`DELETE FROM homework WHERE tenant_id = '${TENANT_ID}' AND teacher_id IN (SELECT id FROM users WHERE email = '${TEACHER_EMAIL}' AND tenant_id = '${TENANT_ID}')`,
			);
		} catch {
			// Table may not exist
		}

		clearRules();
		clearCache();
	});

	// ============================================================================
	// AC1 + AC2: Warning displayed with rule description
	// ============================================================================
	test.describe('AC1 + AC2: Warning display', () => {
		test('shows warning modal when due date violates soft rule', async ({ page }) => {
			seedSoftRules();
			clearCache();

			await loginAsTeacher(page);
			await navigateToHomework(page);

			// Open create modal
			await page.getByRole('button', { name: /nouveau devoir/i }).click();
			await expect(page.getByRole('dialog')).toBeVisible({ timeout: 5000 });

			// Fill form with near due date (2 days → violates 7-day minimum_delay)
			const nearDate = getNextWeekday(2);
			await page.locator('#hw-class').selectOption({ index: 1 });
			await expect(page.locator('#hw-subject')).toBeEnabled({ timeout: 5000 });
			await page.locator('#hw-subject').selectOption({ index: 1 });
			await page.locator('#hw-title').fill('Devoir test warning');
			await page.locator('#hw-due-date').fill(nearDate);

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

			// Warning modal appears
			const warningDialog = page.getByRole('alertdialog');
			await expect(warningDialog).toBeVisible({ timeout: 10000 });
			await expect(warningDialog.getByText(/ne respecte pas les règles/i)).toBeVisible();
			await expect(warningDialog.getByText(/au moins/i)).toBeVisible();
			await expect(warningDialog.getByText(/votre choix sera enregistré/i)).toBeVisible();
		});

		test('no warning when rules not configured', async ({ page }) => {
			clearRules();
			clearCache();

			await loginAsTeacher(page);
			await navigateToHomework(page);

			await page.getByRole('button', { name: /nouveau devoir/i }).click();
			await expect(page.getByRole('dialog')).toBeVisible({ timeout: 5000 });

			const nearDate = getNextWeekday(2);
			await page.locator('#hw-class').selectOption({ index: 1 });
			await expect(page.locator('#hw-subject')).toBeEnabled({ timeout: 5000 });
			await page.locator('#hw-subject').selectOption({ index: 1 });
			await page.locator('#hw-title').fill('Devoir sans rules');
			await page.locator('#hw-due-date').fill(nearDate);

			await page.getByRole('button', { name: /créer le devoir/i }).click();

			// No warning, homework created directly
			await expect(page.getByRole('alertdialog')).not.toBeVisible({ timeout: 3000 });
			await expect(page.getByText('Devoir sans rules')).toBeVisible({ timeout: 10000 });
		});
	});

	// ============================================================================
	// AC3: Continue despite warning → homework created, event traced
	// ============================================================================
	test.describe('AC3: Continue despite warning', () => {
		test('creates homework when choosing to continue', async ({ page }) => {
			seedSoftRules();
			clearCache();

			await loginAsTeacher(page);
			await navigateToHomework(page);

			await page.getByRole('button', { name: /nouveau devoir/i }).click();
			await expect(page.getByRole('dialog')).toBeVisible({ timeout: 5000 });

			const nearDate = getNextWeekday(2);
			await page.locator('#hw-class').selectOption({ index: 1 });
			await expect(page.locator('#hw-subject')).toBeEnabled({ timeout: 5000 });
			await page.locator('#hw-subject').selectOption({ index: 1 });
			await page.locator('#hw-title').fill('Devoir continue warning');
			await page.locator('#hw-due-date').fill(nearDate);

			await page.getByRole('button', { name: /créer le devoir/i }).click();

			// Warning modal appears
			const warningDialog = page.getByRole('alertdialog');
			await expect(warningDialog).toBeVisible({ timeout: 10000 });

			// Click continue
			await warningDialog.getByRole('button', { name: /continuer malgré tout/i }).click();

			// Warning modal closes, homework appears in list
			await expect(warningDialog).not.toBeVisible({ timeout: 5000 });
			await expect(page.getByText('Devoir continue warning')).toBeVisible({ timeout: 10000 });
		});
	});

	// ============================================================================
	// AC4: Modify date → calendar reopens
	// ============================================================================
	test.describe('AC4: Modify date', () => {
		test('reopens create form when choosing to modify date', async ({ page }) => {
			seedSoftRules();
			clearCache();

			await loginAsTeacher(page);
			await navigateToHomework(page);

			await page.getByRole('button', { name: /nouveau devoir/i }).click();
			await expect(page.getByRole('dialog')).toBeVisible({ timeout: 5000 });

			const nearDate = getNextWeekday(2);
			await page.locator('#hw-class').selectOption({ index: 1 });
			await expect(page.locator('#hw-subject')).toBeEnabled({ timeout: 5000 });
			await page.locator('#hw-subject').selectOption({ index: 1 });
			await page.locator('#hw-title').fill('Devoir modifier date');
			await page.locator('#hw-due-date').fill(nearDate);

			await page.getByRole('button', { name: /créer le devoir/i }).click();

			// Warning modal appears
			const warningDialog = page.getByRole('alertdialog');
			await expect(warningDialog).toBeVisible({ timeout: 10000 });

			// Click modify date
			await warningDialog.getByRole('button', { name: /modifier la date/i }).click();

			// Warning closes, create form reopens
			await expect(warningDialog).not.toBeVisible({ timeout: 3000 });
			const createDialog = page.getByRole('dialog');
			await expect(createDialog).toBeVisible();
			await expect(createDialog.locator('#hw-due-date')).toBeVisible();

			// Change to a compliant date (15 days from now)
			const farDate = getNextWeekday(15);
			await page.locator('#hw-due-date').fill(farDate);

			// Submit again — should succeed without warning
			await page.getByRole('button', { name: /créer le devoir/i }).click();
			await expect(page.getByText('Devoir modifier date')).toBeVisible({ timeout: 10000 });
		});
	});

	// ============================================================================
	// AC5: History badge for overridden homeworks
	// ============================================================================
	test.describe('AC5: Discreet badge in history', () => {
		test('shows warning badge on homework created with override', async ({ page }) => {
			seedSoftRules();
			clearCache();

			await loginAsTeacher(page);
			await navigateToHomework(page);

			// Create homework with override
			await page.getByRole('button', { name: /nouveau devoir/i }).click();
			await expect(page.getByRole('dialog')).toBeVisible({ timeout: 5000 });

			const nearDate = getNextWeekday(2);
			await page.locator('#hw-class').selectOption({ index: 1 });
			await expect(page.locator('#hw-subject')).toBeEnabled({ timeout: 5000 });
			await page.locator('#hw-subject').selectOption({ index: 1 });
			await page.locator('#hw-title').fill('Devoir avec badge');
			await page.locator('#hw-due-date').fill(nearDate);

			await page.getByRole('button', { name: /créer le devoir/i }).click();

			const warningDialog = page.getByRole('alertdialog');
			await expect(warningDialog).toBeVisible({ timeout: 10000 });
			await warningDialog.getByRole('button', { name: /continuer malgré tout/i }).click();

			// Homework card should have the warning badge
			await expect(page.getByText('Devoir avec badge')).toBeVisible({ timeout: 10000 });
			const card = page.locator('.homework-card', { hasText: 'Devoir avec badge' });
			await expect(card.locator('.badge-rule-override')).toBeVisible();
		});

		test('no badge on homework created without override', async ({ page }) => {
			clearRules();
			clearCache();

			await loginAsTeacher(page);
			await navigateToHomework(page);

			await page.getByRole('button', { name: /nouveau devoir/i }).click();
			await expect(page.getByRole('dialog')).toBeVisible({ timeout: 5000 });

			const farDate = getNextWeekday(15);
			await page.locator('#hw-class').selectOption({ index: 1 });
			await expect(page.locator('#hw-subject')).toBeEnabled({ timeout: 5000 });
			await page.locator('#hw-subject').selectOption({ index: 1 });
			await page.locator('#hw-title').fill('Devoir normal');
			await page.locator('#hw-due-date').fill(farDate);

			await page.getByRole('button', { name: /créer le devoir/i }).click();

			await expect(page.getByText('Devoir normal')).toBeVisible({ timeout: 10000 });
			const card = page.locator('.homework-card', { hasText: 'Devoir normal' });
			await expect(card.locator('.badge-rule-override')).not.toBeVisible();
		});
	});
});