import { useEffect } from "react";
import {
    Dialog,
    DialogContent,
    DialogDescription,
    DialogFooter,
    DialogHeader,
    DialogTitle,
} from "@/Components/ui/dialog";
import { Button } from "@/Components/ui/button";
import { Input } from "@/Components/ui/input";
import { Label } from "@/Components/ui/label";
import { Textarea } from "@/Components/ui/textarea";
import { SearchableSelect } from "@/Components/ui/searchable-select";
import { useForm } from "@inertiajs/react";
import { toast } from "sonner";
import { Calendar } from "lucide-react";
import { getCurrentDate } from "@/utils/format";

export interface UtilityFee {
    id: number;
    transaction_date: string;
    category: string;
    amount: number | string;
    invoice_number?: string;
    description?: string;
    created_at: string;
    updated_at: string;
}

interface UtilityFeeDialogProps {
    open: boolean;
    onOpenChange: (open: boolean) => void;
    fee: UtilityFee | null;
    availableCategories: string[];
}

const DEFAULT_CATEGORIES = [
    "電費",
    "水費",
    "瓦斯費",
    "電話費",
    "網路費",
    "清潔費",
    "管理費",
];

export default function UtilityFeeDialog({
    open,
    onOpenChange,
    fee,
    availableCategories,
}: UtilityFeeDialogProps) {
    const { data, setData, post, put, processing, errors, reset, clearErrors } = useForm({
        transaction_date: getCurrentDate(),
        category: "",
        amount: "",
        invoice_number: "",
        description: "",
    });

    // Combine default and available categories
    const categories = Array.from(new Set([...DEFAULT_CATEGORIES, ...availableCategories]));

    useEffect(() => {
        if (open) {
            clearErrors();
            if (fee) {
                setData({
                    transaction_date: fee.transaction_date.split("T")[0].split(" ")[0],
                    category: fee.category,
                    amount: fee.amount.toString(),
                    invoice_number: fee.invoice_number || "",
                    description: fee.description || "",
                });
            } else {
                reset();
                setData("transaction_date", getCurrentDate());
            }
        }
    }, [open, fee]);

    const handleSubmit = (e: React.FormEvent) => {
        e.preventDefault();

        if (fee) {
            // Validate invoice number format if present
            if (data.invoice_number && !/^[A-Z]{2}-\d{8}$/.test(data.invoice_number)) {
                toast.error("發票號碼格式錯誤，應為：AB-12345678");
                return;
            }

            put(route("utility-fees.update", fee.id), {
                onSuccess: () => {
                    toast.success("紀錄已更新");
                    onOpenChange(false);
                    reset();
                },
                onError: () => {
                    toast.error("更新失敗，請檢查輸入資料");
                }
            });
        } else {
            // Validate invoice number format if present
            if (data.invoice_number && !/^[A-Z]{2}-\d{8}$/.test(data.invoice_number)) {
                toast.error("發票號碼格式錯誤，應為：AB-12345678");
                return;
            }

            post(route("utility-fees.store"), {
                onSuccess: () => {
                    toast.success("公共事業費已記錄");
                    onOpenChange(false);
                    reset();
                },
                onError: () => {
                    toast.error("紀錄失敗，請檢查輸入資料");
                }
            });
        }
    };

    return (
        <Dialog open={open} onOpenChange={onOpenChange}>
            <DialogContent className="sm:max-w-[500px]">
                <DialogHeader>
                    <DialogTitle>{fee ? "編輯費用紀錄" : "新增費用紀錄"}</DialogTitle>
                    <DialogDescription>
                        {fee ? "修改此筆公共事業費的詳細資訊" : "記錄一筆新的公共事業費支出"}
                    </DialogDescription>
                </DialogHeader>

                <form onSubmit={handleSubmit} className="space-y-4 py-2">
                    <div className="grid grid-cols-1 gap-4">
                        <div className="space-y-2">
                            <Label htmlFor="transaction_date">
                                費用日期 <span className="text-red-500">*</span>
                            </Label>
                            <div className="relative">
                                <Calendar className="absolute left-2.5 top-2.5 h-4 w-4 text-gray-400 pointer-events-none" />
                                <Input
                                    id="transaction_date"
                                    type="date"
                                    value={data.transaction_date}
                                    onChange={(e) => setData("transaction_date", e.target.value)}
                                    className={`pl-9 block w-full ${errors.transaction_date ? "border-red-500" : ""}`}
                                    required
                                />
                            </div>
                            {errors.transaction_date && <p className="text-sm text-red-500">{errors.transaction_date}</p>}
                        </div>

                        <div className="grid grid-cols-2 gap-4">
                            <div className="space-y-2">
                                <Label htmlFor="category">
                                    費用類別 <span className="text-red-500">*</span>
                                </Label>
                                <SearchableSelect
                                    value={data.category}
                                    onValueChange={(value) => setData("category", value)}
                                    options={categories.map((c) => ({ label: c, value: c }))}
                                    placeholder="選擇或輸入類別"
                                    searchPlaceholder="搜尋類別..."
                                    className={errors.category ? "border-red-500" : ""}
                                />
                                {errors.category && <p className="text-sm text-red-500">{errors.category}</p>}
                            </div>

                            <div className="space-y-2">
                                <Label htmlFor="amount">
                                    金額 <span className="text-red-500">*</span>
                                </Label>
                                <Input
                                    id="amount"
                                    type="number"
                                    step="0.01"
                                    value={data.amount}
                                    onChange={(e) => setData("amount", e.target.value)}
                                    placeholder="0.00"
                                    className={errors.amount ? "border-red-500" : ""}
                                    required
                                />
                                {errors.amount && <p className="text-sm text-red-500">{errors.amount}</p>}
                            </div>
                        </div>

                        <div className="space-y-2">
                            <Label htmlFor="invoice_number">發票號碼</Label>
                            <Input
                                id="invoice_number"
                                value={data.invoice_number}
                                onChange={(e) => setData("invoice_number", e.target.value)}
                                placeholder="例：AB-12345678"
                            />
                            <p className="text-xs text-gray-500">格式範例：AB-12345678</p>
                            {errors.invoice_number && <p className="text-sm text-red-500">{errors.invoice_number}</p>}
                        </div>

                        <div className="space-y-2">
                            <Label htmlFor="description">說明 / 備註</Label>
                            <Textarea
                                id="description"
                                value={data.description}
                                onChange={(e) => setData("description", e.target.value)}
                                placeholder="輸入其他備註資訊..."
                                className="resize-none"
                            />
                            {errors.description && <p className="text-sm text-red-500">{errors.description}</p>}
                        </div>
                    </div>

                    <DialogFooter>
                        <Button
                            type="button"
                            variant="outline"
                            onClick={() => onOpenChange(false)}
                            className="button-outlined-primary"
                        >
                            取消
                        </Button>
                        <Button type="submit" className="button-filled-primary" disabled={processing}>
                            {processing ? "處理中..." : (fee ? "儲存變更" : "確認紀錄")}
                        </Button>
                    </DialogFooter>
                </form>
            </DialogContent>
        </Dialog>
    );
}