import { NextRequest, NextResponse } from "next/server";
import { db, schema } from "@/lib/db";
import { getSession } from "@/lib/auth";
import { eq } from "drizzle-orm";

// GET /api/settings - Get current user settings
export async function GET() {
  const user = await getSession();
  if (!user) {
    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
  }

  try {
    const users = await db
      .select({
        reminderEnabled: schema.users.reminderEnabled,
        reminderTime: schema.users.reminderTime,
        reminderAlways: schema.users.reminderAlways,
        llmProvider: schema.users.llmProvider,
        llmApiKey: schema.users.llmApiKey,
        llmModel: schema.users.llmModel,
      })
      .from(schema.users)
      .where(eq(schema.users.id, user.id))
      .limit(1);

    if (users.length === 0) {
      return NextResponse.json({ error: "User not found" }, { status: 404 });
    }

    return NextResponse.json({
      reminderEnabled: users[0].reminderEnabled === 1,
      reminderTime: users[0].reminderTime || "20:00",
      reminderAlways: users[0].reminderAlways === 1,
      llmProvider: users[0].llmProvider || null,
      hasLlmKey: Boolean(users[0].llmApiKey),
      llmModel: users[0].llmModel || null,
    });
  } catch (error) {
    console.error("Failed to fetch settings:", error);
    return NextResponse.json({ error: "Failed to fetch settings" }, { status: 500 });
  }
}

// PATCH /api/settings - Update user settings
export async function PATCH(request: NextRequest) {
  const user = await getSession();
  if (!user) {
    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
  }

  try {
    const body = await request.json();
    const updates: Record<string, unknown> = {};

    if (typeof body.reminderEnabled === "boolean") {
      updates.reminderEnabled = body.reminderEnabled ? 1 : 0;
    }

    if (typeof body.reminderAlways === "boolean") {
      updates.reminderAlways = body.reminderAlways ? 1 : 0;
    }

    if (typeof body.reminderTime === "string") {
      updates.reminderTime = body.reminderTime;
    }

    if (typeof body.llmProvider === "string") {
      updates.llmProvider = body.llmProvider || null;
    }

    if (typeof body.llmApiKey === "string") {
      updates.llmApiKey = body.llmApiKey || null;
    }

    if (typeof body.llmModel === "string") {
      updates.llmModel = body.llmModel || null;
    }

    if (Object.keys(updates).length === 0) {
      return NextResponse.json({ error: "No updates provided" }, { status: 400 });
    }

    await db
      .update(schema.users)
      .set(updates)
      .where(eq(schema.users.id, user.id));

    return NextResponse.json({ success: true });
  } catch (error) {
    console.error("Failed to update settings:", error);
    return NextResponse.json({ error: "Failed to update settings" }, { status: 500 });
  }
}