"use client";

import { useState } from "react";
import { Minus, Plus, X, ArrowLeft, ShoppingBag, Check } from "lucide-react";
import { Button } from "@/components/ui/button";
import { useCart } from "@/contexts/CartContext";
import { useAuth } from "@/contexts/AuthContext";
import { useLanguage } from "@/contexts/LanguageContext";
import { createOrder } from "@/lib/api/orders";
import { ApiError } from "@/lib/api";
import Link from "next/link";
import { toast } from "sonner";

export default function Cart() {
  const { items, updateQuantity, removeItem, clearCart, totalPrice } = useCart();
  const { user } = useAuth();
  const { t } = useLanguage();
  const [loading, setLoading] = useState(false);
  const [ordered, setOrdered] = useState(false);

  const handleCheckout = async () => {
    if (!user) {
      toast.error(t("cart.login_required"));
      return;
    }
    setLoading(true);
    try {
      await createOrder({
        items: items.map((i) => ({ product_id: i.product.id, quantity: i.quantity })),
      });
      clearCart();
      setOrdered(true);
    } catch (err) {
      const msg = err instanceof ApiError ? err.message : t("cart.error");
      toast.error(msg);
    } finally {
      setLoading(false);
    }
  };

  if (ordered) {
    return (
      <div className="min-h-screen flex items-center justify-center py-12 px-4">
        <div className="text-center max-w-md">
          <div className="h-16 w-16 rounded-full bg-primary/10 flex items-center justify-center mx-auto mb-6">
            <Check className="h-8 w-8 text-primary" />
          </div>
          <h2 className="font-serif text-3xl mb-3">{t("cart.confirmed_title")}</h2>
          <p className="text-muted-foreground mb-6">{t("cart.confirmed_desc")}</p>
          <Link href="/boutique">
            <Button variant="outline">
              <ArrowLeft className="h-4 w-4 mr-2" />
              {t("cart.continue_shopping")}
            </Button>
          </Link>
        </div>
      </div>
    );
  }

  return (
    <div className="min-h-screen py-8 lg:py-12">
      <div className="container mx-auto px-4 lg:px-8 max-w-3xl">
        <h1 className="font-serif text-3xl lg:text-4xl text-center mb-10">{t("cart.title")}</h1>

        {items.length === 0 ? (
          <div className="text-center py-20">
            <ShoppingBag className="h-16 w-16 mx-auto mb-4 text-muted-foreground/30" />
            <p className="text-muted-foreground mb-6">{t("cart.empty")}</p>
            <Link href="/boutique">
              <Button variant="outline">
                <ArrowLeft className="h-4 w-4 mr-2" />
                {t("nav.shop")}
              </Button>
            </Link>
          </div>
        ) : (
          <>
            <div className="space-y-4">
              {items.map((item) => (
                <div
                  key={`${item.product.id}-${item.selectedColor}-${item.selectedLength}`}
                  className="flex gap-4 p-4 bg-card rounded-lg border border-border"
                >
                  <img
                    src={item.product.image}
                    alt={item.product.name}
                    className="w-24 h-32 object-cover rounded-md"
                  />
                  <div className="flex-1">
                    <div className="flex justify-between items-start">
                      <div>
                        <h3 className="font-medium">{item.product.name}</h3>
                        <p className="text-sm text-muted-foreground mt-0.5">
                          {item.selectedColor} • {item.selectedLength}
                        </p>
                      </div>
                      <button
                        onClick={() => removeItem(item.product.id)}
                        className="text-muted-foreground hover:text-destructive"
                      >
                        <X className="h-4 w-4" />
                      </button>
                    </div>
                    <div className="flex items-center justify-between mt-4">
                      <div className="flex items-center gap-3">
                        <button
                          onClick={() => updateQuantity(item.product.id, item.quantity - 1)}
                          className="p-1.5 border border-border rounded-md hover:bg-muted"
                        >
                          <Minus className="h-3 w-3" />
                        </button>
                        <span className="text-sm font-medium w-6 text-center">{item.quantity}</span>
                        <button
                          onClick={() => updateQuantity(item.product.id, item.quantity + 1)}
                          className="p-1.5 border border-border rounded-md hover:bg-muted"
                        >
                          <Plus className="h-3 w-3" />
                        </button>
                      </div>
                      <span className="font-semibold">
                        {(item.product.price * item.quantity).toFixed(2)} €
                      </span>
                    </div>
                  </div>
                </div>
              ))}
            </div>

            <div className="mt-8 bg-card rounded-lg border border-border p-6">
              <div className="flex justify-between items-center text-lg mb-4">
                <span className="font-medium">{t("cart.total")}</span>
                <span className="font-serif text-xl font-semibold">{totalPrice.toFixed(2)} €</span>
              </div>
              {!user && (
                <p className="text-sm text-muted-foreground mb-3 text-center">
                  <Link href="/connexion" className="text-primary hover:underline">{t("cart.login_link")}</Link>{" "}
                  {t("cart.login_suffix")}
                </p>
              )}
              <Button
                className="w-full"
                size="lg"
                onClick={handleCheckout}
                disabled={loading || !user}
              >
                {loading ? t("cart.processing") : t("cart.checkout")}
              </Button>
              <p className="text-xs text-muted-foreground text-center mt-3">
                {t("cart.payment_note")}
              </p>
            </div>
          </>
        )}
      </div>
    </div>
  );
}