import { NextResponse } from "next/server";
import { sql } from "@/db";

// GET - list doctor visits for a child
export async function GET(request: Request) {
  const { searchParams } = new URL(request.url);
  const childId = searchParams.get("childId") || "default";

  try {
    const visits = await sql.unsafe(
      `SELECT id, doctor_name as "doctorName", reason, visit_date as "date", notes, created_at as "createdAt"
       FROM doctor_visits WHERE child_id = $1 ORDER BY visit_date DESC`,
      [childId]
    );
    return NextResponse.json({ visits: visits || [] });
  } catch (error) {
    console.error(error);
    return NextResponse.json({ error: String(error) }, { status: 500 });
  }
}

// POST - create visit
export async function POST(request: Request) {
  try {
    const body = await request.json();
    const { childId, doctorName, reason, date, notes } = body;

    if (!childId || !doctorName || !date) {
      return NextResponse.json({ error: "Missing required fields" }, { status: 400 });
    }

    const [visit] = await sql.unsafe(
      `INSERT INTO doctor_visits (child_id, doctor_name, reason, visit_date, notes)
       VALUES ($1, $2, $3, $4, $5)
       RETURNING id, doctor_name as "doctorName", reason, visit_date as "date", notes`,
      [childId, doctorName, reason || null, date, notes || null]
    );

    return NextResponse.json({ success: true, visit });
  } catch (error) {
    console.error(error);
    return NextResponse.json({ error: String(error) }, { status: 500 });
  }
}

// PATCH - update visit
export async function PATCH(request: Request) {
  try {
    const body = await request.json();
    const { id, doctorName, reason, date, notes } = body;

    if (!id || !doctorName || !date) {
      return NextResponse.json({ error: "Missing required fields" }, { status: 400 });
    }

    const [visit] = await sql.unsafe(
      `UPDATE doctor_visits SET doctor_name = $1, reason = $2, visit_date = $3, notes = $4, updated_at = NOW()
       WHERE id = $5
       RETURNING id, doctor_name as "doctorName", reason, visit_date as "date", notes`,
      [doctorName, reason, date, notes, id]
    );

    return NextResponse.json({ success: true, visit });
  } catch (error) {
    console.error(error);
    return NextResponse.json({ error: String(error) }, { status: 500 });
  }
}

// DELETE - delete visit
export async function DELETE(request: Request) {
  const { searchParams } = new URL(request.url);
  const id = searchParams.get("id");

  if (!id) {
    return NextResponse.json({ error: "ID required" }, { status: 400 });
  }

  try {
    await sql.unsafe(`DELETE FROM doctor_visits WHERE id = $1`, [id]);
    return NextResponse.json({ success: true });
  } catch (error) {
    console.error(error);
    return NextResponse.json({ error: String(error) }, { status: 500 });
  }
}