import { describe, it, expect, beforeAll, afterAll } from 'vitest';
import { buildApp } from '../src/app';

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

function makeJwt(app: any, payload: object) {
    return (app as any).jwt.sign(payload);
}

// ─── Suite ────────────────────────────────────────────────────────────────────

describe('Route Input Validation', () => {
    let app: any;

    beforeAll(async () => {
        app = await buildApp();
    });

    afterAll(async () => {
        await app.close();
    });

    // ── Campaign routes — unauthenticated ────────────────────────────────────

    describe('Campaign routes — auth required', () => {
        const routes = [
            { method: 'POST' as const, url: '/v1/organizations/org1/campaigns/generate' },
            { method: 'POST' as const, url: '/v1/organizations/org1/campaigns/send' },
            { method: 'POST' as const, url: '/v1/organizations/org1/campaigns/broadcast' },
        ];

        for (const { method, url } of routes) {
            it(`${method} ${url} returns 401 with no token`, async () => {
                const res = await app.inject({ method, url, payload: {} });
                expect(res.statusCode).toBe(401);
            });
        }
    });

    // ── Campaign /send — schema validation ───────────────────────────────────
    // These tests require a JWT but NOT a real DB org (schema check fires first).
    // We cannot use app.inject for these because injectTenantConfig runs before
    // route handlers and requires a real org in the DB. Validate schema logic
    // directly instead.

    describe('Campaign /send — schema validation (pure logic)', () => {
        const { z } = require('zod');

        const sendSchema = z.object({
            listId: z.string().uuid(),
            message: z.string().min(1),
            sendAt: z.string().datetime({ offset: true }).optional(),
        });

        it('rejects missing listId', () => {
            const r = sendSchema.safeParse({ message: 'hello' });
            expect(r.success).toBe(false);
        });

        it('rejects non-uuid listId', () => {
            const r = sendSchema.safeParse({ listId: 'not-a-uuid', message: 'hello' });
            expect(r.success).toBe(false);
        });

        it('rejects empty message', () => {
            const r = sendSchema.safeParse({ listId: '00000000-0000-0000-0000-000000000001', message: '' });
            expect(r.success).toBe(false);
        });

        it('rejects invalid sendAt (not ISO datetime)', () => {
            const r = sendSchema.safeParse({
                listId: '00000000-0000-0000-0000-000000000001',
                message: 'hello',
                sendAt: 'not-a-date',
            });
            expect(r.success).toBe(false);
        });

        it('accepts valid payload without sendAt', () => {
            const r = sendSchema.safeParse({
                listId: '00000000-0000-0000-0000-000000000001',
                message: 'Hello students!',
            });
            expect(r.success).toBe(true);
        });

        it('accepts valid payload with future sendAt', () => {
            const future = new Date(Date.now() + 60_000).toISOString();
            const r = sendSchema.safeParse({
                listId: '00000000-0000-0000-0000-000000000001',
                message: 'Hello students!',
                sendAt: future,
            });
            expect(r.success).toBe(true);
        });
    });

    // ── Campaign /broadcast — schema validation (pure logic) ─────────────────

    describe('Campaign /broadcast — schema validation (pure logic)', () => {
        const { z } = require('zod');

        const broadcastSchema = z.object({
            message: z.string().optional(),
            listId: z.string().uuid().optional(),
            templateName: z.string().optional(),
            templateLanguage: z.string().optional(),
            sendAt: z.string().datetime({ offset: true }).optional(),
        });

        it('accepts empty body (schema is permissive — business logic handles missing content)', () => {
            expect(broadcastSchema.safeParse({}).success).toBe(true);
        });

        it('rejects non-uuid listId', () => {
            expect(broadcastSchema.safeParse({ listId: 'bad-uuid' }).success).toBe(false);
        });

        it('rejects invalid sendAt format', () => {
            expect(broadcastSchema.safeParse({ sendAt: '2024-13-40' }).success).toBe(false);
        });

        it('accepts valid broadcast with template', () => {
            expect(broadcastSchema.safeParse({
                templateName: 'welcome_message',
                templateLanguage: 'fr',
                listId: '00000000-0000-0000-0000-000000000002',
            }).success).toBe(true);
        });
    });

    // ── Campaign /generate — schema validation (pure logic) ──────────────────

    describe('Campaign /generate — schema validation (pure logic)', () => {
        const { z } = require('zod');

        const generateSchema = z.object({
            prompt: z.string().min(1).max(2000),
            listId: z.string().uuid().optional(),
        });

        it('rejects empty prompt', () => {
            expect(generateSchema.safeParse({ prompt: '' }).success).toBe(false);
        });

        it('rejects prompt over 2000 chars', () => {
            expect(generateSchema.safeParse({ prompt: 'x'.repeat(2001) }).success).toBe(false);
        });

        it('accepts valid prompt', () => {
            expect(generateSchema.safeParse({ prompt: 'Create a motivational message for day 3' }).success).toBe(true);
        });
    });

    // ── Analytics /query — SQL injection patterns (pure unit) ────────────────

    describe('Analytics /query — SQL injection patterns', () => {
        // Mirror patterns from analytics.ts
        const DANGEROUS_PATTERNS = [/\bUNION\b/, /\bINSERT\b/, /\bUPDATE\b/, /\bDELETE\b/, /\bDROP\b/, /\bEXEC\b/, /\bEXECUTE\b/, /--/, /\/\*/, /;\s*SELECT/i];
        const isSafe = (sql: string) => !DANGEROUS_PATTERNS.some(p => p.test(sql.toUpperCase()));
        const isDangerous = (sql: string) => DANGEROUS_PATTERNS.some(p => p.test(sql.toUpperCase()));

        // Dangerous inputs
        it('blocks UNION SELECT', () => expect(isDangerous('SELECT * FROM x UNION SELECT * FROM y')).toBe(true));
        it('blocks DROP TABLE', () => expect(isDangerous('DROP TABLE users')).toBe(true));
        it('blocks DELETE statement', () => expect(isDangerous('DELETE FROM users WHERE 1=1')).toBe(true));
        it('blocks INSERT statement', () => expect(isDangerous("INSERT INTO users VALUES ('x')")).toBe(true));
        it('blocks UPDATE statement', () => expect(isDangerous("UPDATE users SET x='y'")).toBe(true));
        it('blocks EXEC call', () => expect(isDangerous('EXEC xp_cmdshell')).toBe(true));
        it('blocks EXECUTE call', () => expect(isDangerous('EXECUTE sp_executesql')).toBe(true));
        it('blocks -- comment', () => expect(isDangerous("SELECT 1 -- bypass")).toBe(true));
        it('blocks /* comment */', () => expect(isDangerous('SELECT 1 /* comment */')).toBe(true));
        it('blocks stacked ; SELECT', () => expect(isDangerous('SELECT 1; SELECT * FROM x')).toBe(true));

        // Safe inputs
        it('allows plain SELECT', () => expect(isSafe('SELECT COUNT(*) FROM "Message" WHERE "organizationId" = \'x\'')).toBe(true));
        it('allows SELECT with GROUP BY', () => expect(isSafe('SELECT feature, COUNT(*) FROM "UsageEvent" GROUP BY feature ORDER BY 2 DESC LIMIT 5')).toBe(true));
        it('allows SELECT with JOIN', () => expect(isSafe('SELECT u.name, COUNT(m.id) FROM "User" u LEFT JOIN "Message" m ON m."userId" = u.id GROUP BY u.name')).toBe(true));
    });

    // ── Auth routes — no auth required ───────────────────────────────────────

    describe('Auth routes — public endpoints', () => {
        it('POST /v1/auth/login with invalid credentials returns 400, 401, or 500 (no DB in test env)', async () => {
            const res = await app.inject({
                method: 'POST',
                url: '/v1/auth/login',
                payload: { email: 'nobody@example.com', password: 'wrongpass' },
            });
            expect([400, 401, 500]).toContain(res.statusCode);
        });

        it('POST /v1/auth/login with empty body returns 400', async () => {
            const res = await app.inject({
                method: 'POST',
                url: '/v1/auth/login',
                payload: {},
            });
            expect(res.statusCode).toBe(400);
        });
    });
});