import { FastifyInstance } from 'fastify';
import { prisma } from '../services/prisma';
import { z } from 'zod';

/**
 * Student-facing public routes (query by phone number).
 * Protected by ADMIN_API_KEY in the guarded scope.
 */
export async function studentRoutes(fastify: FastifyInstance) {

    // GET /v1/student/me?phone=221771234567
    // Returns user profile + enrollments + generated documents
    fastify.get('/me', async (req, reply) => {
        const query = req.query as { phone?: string };

        const phoneSchema = z.string().min(7);
        const phoneResult = phoneSchema.safeParse(query.phone);
        if (!phoneResult.success) {
            return reply.code(400).send({ error: 'phone query param is required' });
        }

        const phone = phoneResult.data.replace(/\s+/g, '').replace(/^\+/, '');

        const user = await prisma.user.findUnique({
            where: { phone },
            include: {
                enrollments: {
                    include: {
                        track: {
                            include: { days: { orderBy: { dayNumber: 'asc' }, take: 1 } }
                        }
                    },
                    orderBy: { startedAt: 'desc' }
                },
                payments: {
                    where: { status: 'COMPLETED' },
                    orderBy: { createdAt: 'desc' }
                },
                progress: {
                    orderBy: { lastInteraction: 'desc' }
                }
            }
        });

        if (!user) {
            return reply.code(404).send({ error: 'User not found. Send INSCRIPTION on WhatsApp to register.' });
        }

        return {
            id: user.id,
            phone: user.phone,
            name: user.name,
            language: user.language,
            activity: user.activity,
            createdAt: user.createdAt,
            enrollments: user.enrollments.map(e => ({
                id: e.id,
                trackId: e.trackId,
                trackTitle: e.track.title,
                status: e.status,
                currentDay: e.currentDay,
                totalDays: e.track.duration,
                progressPercent: Math.round((e.currentDay / e.track.duration) * 100),
                startedAt: e.startedAt,
                completedAt: e.completedAt,
            })),
            payments: user.payments,
            // R2 document URLs are stored as Payment metadata (future enhancement)
        };
    });
}