import { NextRequest, NextResponse } from "next/server";
import { cookies } from "next/headers";
import { EvaluationService } from "@/services/evaluation-service";
import { UserProfile } from "@/lib/types";

const COOKIE_NAME = "peakSkills_userId";
const COOKIE_MAX_AGE = 30 * 24 * 60 * 60; // 30 jours

/**
 * GET /api/auth - Récupère l'utilisateur actuel depuis le cookie
 */
export async function GET() {
  try {
    const cookieStore = await cookies();
    const userUuid = cookieStore.get(COOKIE_NAME)?.value;

    if (!userUuid) {
      return NextResponse.json({ user: null }, { status: 200 });
    }

    const evaluationService = new EvaluationService();
    const userProfile = await evaluationService.getUserByUuid(userUuid);

    if (!userProfile) {
      // Cookie invalide, le supprimer
      const response = NextResponse.json({ user: null }, { status: 200 });
      response.cookies.set(COOKIE_NAME, "", { maxAge: 0 });
      return response;
    }

    return NextResponse.json({ user: userProfile }, { status: 200 });
  } catch (error) {
    console.error("Error getting current user:", error);
    return NextResponse.json(
      { error: "Failed to get current user" },
      { status: 500 }
    );
  }
}

/**
 * POST /api/auth - Authentifie un utilisateur et créé/met à jour le cookie
 */
export async function POST(request: NextRequest) {
  try {
    const profile: UserProfile = await request.json();

    if (!profile.firstName || !profile.lastName || !profile.teamId) {
      return NextResponse.json(
        { error: "Missing required fields" },
        { status: 400 }
      );
    }

    const evaluationService = new EvaluationService();

    // Vérifier s'il y a déjà un cookie d'authentification
    const cookieStore = await cookies();
    const existingUserUuid = cookieStore.get(COOKIE_NAME)?.value;

    let userUuid: string;

    if (existingUserUuid) {
      // Mettre à jour l'utilisateur existant
      await evaluationService.updateUserByUuid(existingUserUuid, profile);
      userUuid = existingUserUuid;
    } else {
      // Créer un nouvel utilisateur
      userUuid = await evaluationService.upsertUserUuid(profile);
    }

    // Créer la réponse avec le cookie
    const response = NextResponse.json(
      {
        user: { ...profile, uuid: userUuid },
        userUuid,
      },
      { status: 200 }
    );

    // Définir le cookie avec l'UUID utilisateur (plus sécurisé)
    response.cookies.set(COOKIE_NAME, userUuid, {
      maxAge: COOKIE_MAX_AGE,
      httpOnly: true,
      secure: process.env.NODE_ENV === "production",
      sameSite: "lax",
      path: "/",
    });

    return response;
  } catch (error) {
    console.error("Error authenticating user:", error);
    return NextResponse.json(
      { error: "Failed to authenticate user" },
      { status: 500 }
    );
  }
}

/**
 * DELETE /api/auth - Déconnecte l'utilisateur (supprime le cookie)
 */
export async function DELETE() {
  try {
    const response = NextResponse.json({ success: true }, { status: 200 });
    response.cookies.set(COOKIE_NAME, "", { maxAge: 0 });
    return response;
  } catch (error) {
    console.error("Error logging out user:", error);
    return NextResponse.json({ error: "Failed to logout" }, { status: 500 });
  }
}