"use client";

import { Package } from "lucide-react";
import { useEffect, useState } from "react";
import { Button } from "@/components/ui/button";
import { Checkbox } from "@/components/ui/checkbox";
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogHeader,
  DialogTitle,
} from "@/components/ui/dialog";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select";
import { Separator } from "@/components/ui/separator";
import { Textarea } from "@/components/ui/textarea";
import { useSession } from "@/lib/hooks/use-session";
import { ItemSearch } from "./ItemSearch";

interface Item {
  id: number;
  name: string;
  category?: string;
  image?: string;
  [key: string]: any;
}

interface CreateAdModalProps {
  open: boolean;
  onOpenChange: (open: boolean) => void;
  onSuccess?: () => void;
}

interface Server {
  serverId: number;
  serverName: string;
  serverType: string;
  location: string;
  isActive: boolean;
}

export function CreateAdModal({
  open,
  onOpenChange,
  onSuccess,
}: CreateAdModalProps) {
  const { user } = useSession();
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);
  const [servers, setServers] = useState<Server[]>([]);
  const [loadingServers, setLoadingServers] = useState(false);

  const [selectedItem, setSelectedItem] = useState<Item | null>(null);
  const [tradeItem, setTradeItem] = useState<Item | null>(null);
  const [acceptTrade, setAcceptTrade] = useState(false);

  const [formData, setFormData] = useState({
    quantity: "1",
    server_name: "",
    price_pix: "",
    price_tibia_coins: "",
    price_gold_coins: "",
    trade_item_quantity: "1",
    description: "",
  });

  const handleItemSelect = (item: Item | null) => {
    setSelectedItem(item);
  };

  const handleTradeItemSelect = (item: Item | null) => {
    setTradeItem(item);
  };

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    setLoading(true);
    setError(null);

    try {
      // Validar item selecionado
      if (!selectedItem) {
        setError("Selecione um item para vender");
        setLoading(false);
        return;
      }

      // Validar pelo menos um método de pagamento (preço ou troca)
      const hasPrice =
        formData.price_pix ||
        formData.price_tibia_coins ||
        formData.price_gold_coins;

      if (!hasPrice && (!acceptTrade || !tradeItem)) {
        setError(
          "Informe pelo menos um preço (PIX, TC ou GP) ou configure uma troca por item",
        );
        setLoading(false);
        return;
      }

      // Validar troca se aceita troca
      if (acceptTrade && !tradeItem) {
        setError("Selecione o item que deseja receber em troca");
        setLoading(false);
        return;
      }

      const response = await fetch("/api/listings", {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify({
          item_id: selectedItem.id,
          item_name: selectedItem.name,
          quantity: parseInt(formData.quantity, 10),
          server_name: formData.server_name,
          price_pix: formData.price_pix ? parseFloat(formData.price_pix) : null,
          price_tibia_coins: formData.price_tibia_coins
            ? parseInt(formData.price_tibia_coins, 10)
            : null,
          price_gold_coins: formData.price_gold_coins
            ? parseInt(formData.price_gold_coins, 10)
            : null,
          description: formData.description || null,
          trade_item_id: acceptTrade && tradeItem ? tradeItem.id : null,
          trade_item_name: acceptTrade && tradeItem ? tradeItem.name : null,
          trade_item_quantity:
            acceptTrade && tradeItem
              ? parseInt(formData.trade_item_quantity, 10)
              : null,
        }),
      });

      const data = await response.json();

      if (!response.ok) {
        if (data?.details?.length) {
          const fieldLabels: Record<string, string> = {
            item_id: "Item",
            item_id_unified: "Item",
            item_name: "Nome do item",
            quantity: "Quantidade",
            server_name: "Servidor",
            price_pix: "Preço PIX",
            price_tibia_coins: "Preço Tibia Coins",
            price_gold_coins: "Preço Gold Coins",
            trade_item_id: "Item de troca",
            trade_item_name: "Nome do item de troca",
            trade_item_quantity: "Quantidade do item de troca",
            auction_ends_at: "Término do leilão",
          };

          const validationMessages = data.details.map(
            (detail: { field?: string; message?: string }) => {
              const fieldLabel = detail.field
                ? fieldLabels[detail.field] || detail.field
                : "Campo";
              return `${fieldLabel}: ${detail.message ?? "preenchimento obrigatório"}`;
            },
          );

          setError(validationMessages.join(" "));
        } else {
          setError(data?.error || "Erro ao criar anúncio");
        }
        setLoading(false);
        return;
      }

      // Limpar formulário
      setSelectedItem(null);
      setTradeItem(null);
      setAcceptTrade(false);
      setFormData({
        quantity: "1",
        server_name: "",
        price_pix: "",
        price_tibia_coins: "",
        price_gold_coins: "",
        trade_item_quantity: "1",
        description: "",
      });

      onOpenChange(false);
      if (onSuccess) {
        onSuccess();
      }
    } catch (err) {
      setError("Erro ao criar anúncio. Tente novamente.");
      console.error(err);
    } finally {
      setLoading(false);
    }
  };

  // Carregar servidores ao abrir o modal
  const loadServers = async () => {
    setLoadingServers(true);
    try {
      const res = await fetch("/api/servers");
      if (res.ok) {
        const data = await res.json();
        setServers(data.servers || []);
      }
    } catch (error) {
      console.error("Erro ao carregar servidores:", error);
    } finally {
      setLoadingServers(false);
    }
  };

  useEffect(() => {
    if (open) {
      loadServers();
    }
  }, [open, loadServers]);

  const handleClose = () => {
    if (!loading) {
      setSelectedItem(null);
      setTradeItem(null);
      setAcceptTrade(false);
      setFormData({
        quantity: "1",
        server_name: "",
        price_pix: "",
        price_tibia_coins: "",
        price_gold_coins: "",
        trade_item_quantity: "1",
        description: "",
      });
      setError(null);
      onOpenChange(false);
    }
  };

  if (!user) {
    return null;
  }

  return (
    <Dialog open={open} onOpenChange={handleClose}>
      <DialogContent className="max-w-3xl max-h-[90vh] overflow-y-auto">
        <DialogHeader>
          <DialogTitle>Criar Novo Anúncio</DialogTitle>
          <DialogDescription>
            Preencha os dados do item que deseja vender
          </DialogDescription>
        </DialogHeader>

        <form onSubmit={handleSubmit} className="space-y-6">
          {/* Seleção do item a vender */}
          <div className="space-y-2">
            <Label htmlFor="item_search">Item a Vender *</Label>
            <ItemSearch
              onItemSelect={handleItemSelect}
              selectedItem={selectedItem}
              placeholder="Pesquise o nome do item..."
            />
          </div>

          <div className="grid grid-cols-2 gap-4">
            <div className="space-y-2">
              <Label htmlFor="quantity">Quantidade *</Label>
              <Input
                id="quantity"
                type="number"
                min="1"
                required
                value={formData.quantity}
                onChange={(e) =>
                  setFormData({ ...formData, quantity: e.target.value })
                }
              />
            </div>

            <div className="space-y-2">
              <Label htmlFor="server_name">Servidor *</Label>
              <Select
                value={formData.server_name}
                onValueChange={(value) =>
                  setFormData({ ...formData, server_name: value })
                }
                required
                disabled={loadingServers}
              >
                <SelectTrigger id="server_name">
                  <SelectValue placeholder="Selecione um servidor" />
                </SelectTrigger>
                <SelectContent>
                  {servers.length === 0 && !loadingServers ? (
                    <SelectItem value="" disabled>
                      Nenhum servidor disponível
                    </SelectItem>
                  ) : (
                    servers.map((server) => (
                      <SelectItem
                        key={server.serverId}
                        value={server.serverName}
                      >
                        {server.serverName}
                        {server.location && ` (${server.location})`}
                      </SelectItem>
                    ))
                  )}
                </SelectContent>
              </Select>
            </div>
          </div>

          <Separator />

          {/* Preços */}
          <div className="space-y-2">
            <Label>Preços (opcional se aceitar troca)</Label>
            <div className="grid grid-cols-3 gap-4">
              <div className="space-y-2">
                <Label htmlFor="price_pix" className="text-sm">
                  PIX (R$)
                </Label>
                <Input
                  id="price_pix"
                  type="number"
                  step="0.01"
                  min="0"
                  value={formData.price_pix}
                  onChange={(e) =>
                    setFormData({ ...formData, price_pix: e.target.value })
                  }
                  placeholder="0.00"
                />
              </div>

              <div className="space-y-2">
                <Label htmlFor="price_tibia_coins" className="text-sm">
                  Tibia Coins
                </Label>
                <Input
                  id="price_tibia_coins"
                  type="number"
                  min="0"
                  value={formData.price_tibia_coins}
                  onChange={(e) =>
                    setFormData({
                      ...formData,
                      price_tibia_coins: e.target.value,
                    })
                  }
                  placeholder="0"
                />
              </div>

              <div className="space-y-2">
                <Label htmlFor="price_gold_coins" className="text-sm">
                  Gold Coins
                </Label>
                <Input
                  id="price_gold_coins"
                  type="number"
                  min="0"
                  value={formData.price_gold_coins}
                  onChange={(e) =>
                    setFormData({
                      ...formData,
                      price_gold_coins: e.target.value,
                    })
                  }
                  placeholder="0"
                />
              </div>
            </div>
          </div>

          <Separator />

          {/* Troca por item */}
          <div className="space-y-4">
            <div className="flex items-center space-x-2">
              <Checkbox
                id="accept_trade"
                checked={acceptTrade}
                onCheckedChange={(checked) => {
                  setAcceptTrade(checked as boolean);
                  if (!checked) {
                    setTradeItem(null);
                  }
                }}
              />
              <Label
                htmlFor="accept_trade"
                className="text-sm font-medium leading-none peer-disabled:cursor-not-allowed peer-disabled:opacity-70 cursor-pointer flex items-center gap-2"
              >
                <Package className="h-4 w-4" />
                Aceitar troca por item (além dos valores monetários)
              </Label>
            </div>

            {acceptTrade && (
              <div className="space-y-4 pl-6 border-l-2 border-primary/20">
                <div className="space-y-2">
                  <Label>Item Desejado em Troca *</Label>
                  <ItemSearch
                    onItemSelect={handleTradeItemSelect}
                    selectedItem={tradeItem}
                    placeholder="Pesquise o item que deseja receber..."
                  />
                </div>

                {tradeItem && (
                  <div className="space-y-2">
                    <Label htmlFor="trade_item_quantity">
                      Quantidade do Item de Troca *
                    </Label>
                    <Input
                      id="trade_item_quantity"
                      type="number"
                      min="1"
                      required
                      value={formData.trade_item_quantity}
                      onChange={(e) =>
                        setFormData({
                          ...formData,
                          trade_item_quantity: e.target.value,
                        })
                      }
                    />
                  </div>
                )}
              </div>
            )}
          </div>

          <Separator />

          {/* Descrição */}
          <div className="space-y-2">
            <Label htmlFor="description">Descrição (opcional)</Label>
            <Textarea
              id="description"
              maxLength={5000}
              value={formData.description}
              onChange={(e) =>
                setFormData({ ...formData, description: e.target.value })
              }
              placeholder="Descreva o item, condições, etc..."
              rows={4}
            />
            <p className="text-xs text-muted-foreground">
              {formData.description.length}/5000 caracteres
            </p>
          </div>

          {error && (
            <div className="p-3 bg-destructive/10 text-destructive rounded-md text-sm">
              {error}
            </div>
          )}

          <div className="flex justify-end gap-2">
            <Button
              type="button"
              variant="outline"
              onClick={handleClose}
              disabled={loading}
            >
              Cancelar
            </Button>
            <Button type="submit" disabled={loading}>
              {loading ? "Criando..." : "Criar Anúncio"}
            </Button>
          </div>
        </form>
      </DialogContent>
    </Dialog>
  );
}