import { NextRequest, NextResponse } from "next/server";
import { getServerSession } from "next-auth";
import { authOptions } from "@/lib/auth";
import { prisma } from "@/lib/prisma";

// GET /api/appointments/[id]
export async function GET(
  request: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  try {
    const { id } = await params;
    const session = await getServerSession(authOptions);
    
    if (!session?.user?.email) {
      return NextResponse.json({ error: "No autorizado" }, { status: 401 });
    }

    const user = await prisma.user.findUnique({
      where: { email: session.user.email },
    });

    if (!user) {
      return NextResponse.json({ error: "Usuario no encontrado" }, { status: 404 });
    }

    const appointment = await prisma.appointment.findUnique({
      where: { id },
      include: {
        paciente: {
          select: {
            id: true,
            name: true,
            lastname: true,
            email: true,
            profileImage: true,
            phone: true,
          },
        },
        medico: {
          select: {
            id: true,
            name: true,
            lastname: true,
            email: true,
            profileImage: true,
          },
        },
      },
    });

    if (!appointment) {
      return NextResponse.json({ error: "Cita no encontrada" }, { status: 404 });
    }

    // Validar acceso
    const canAccess =
      appointment.pacienteId === user.id ||
      appointment.medicoId === user.id ||
      user.role === "ADMIN";

    if (!canAccess) {
      return NextResponse.json({ error: "No autorizado" }, { status: 403 });
    }

    return NextResponse.json(appointment);
  } catch (error) {
    console.error("Error al obtener cita:", error);
    return NextResponse.json({ error: "Error al obtener cita" }, { status: 500 });
  }
}

// PATCH /api/appointments/[id] - Cancelar cita (paciente)
export async function PATCH(
  request: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  try {
    const { id } = await params;
    const session = await getServerSession(authOptions);
    
    if (!session?.user?.email) {
      return NextResponse.json({ error: "No autorizado" }, { status: 401 });
    }

    const user = await prisma.user.findUnique({
      where: { email: session.user.email },
    });

    if (!user) {
      return NextResponse.json({ error: "Usuario no encontrado" }, { status: 404 });
    }

    const appointment = await prisma.appointment.findUnique({
      where: { id },
    });

    if (!appointment) {
      return NextResponse.json({ error: "Cita no encontrada" }, { status: 404 });
    }

    // Solo el paciente puede cancelar
    if (appointment.pacienteId !== user.id) {
      return NextResponse.json({ error: "No autorizado" }, { status: 403 });
    }

    const updated = await prisma.appointment.update({
      where: { id },
      data: { estado: "CANCELADA" },
      include: {
        paciente: {
          select: {
            id: true,
            name: true,
            lastname: true,
            email: true,
            profileImage: true,
          },
        },
        medico: {
          select: {
            id: true,
            name: true,
            lastname: true,
            email: true,
            profileImage: true,
          },
        },
      },
    });

    return NextResponse.json(updated);
  } catch (error) {
    console.error("Error al cancelar cita:", error);
    return NextResponse.json({ error: "Error al cancelar cita" }, { status: 500 });
  }
}