"use client";

import { useEffect, useState } from "react";

import { useAlertStore } from "@/shared/lib";
import {
    Button,
    Dialog,
    DialogClose,
    DialogContent,
    DialogFooter,
    DialogHeader,
    DialogTitle,
    Input,
    Label,
} from "@common/components";

export interface MainFacilityMappingSaveDialogValues {
    prxyBzentyNmCn: string;
    /** 위탁비용(백만원/년) */
    cnsgnCstVl: number;
    wholNope: number;
    /** YYYYMMDD~YYYYMMDD */
    prxyCtrtCn: string;
}

export interface MainFacilityMappingSaveDialogProps {
    open: boolean;
    onOpenChange: (open: boolean) => void;
    initialPrxyBzentyNmCn: string;
    /** 위탁비용(백만원/년) 초기값 */
    initialCnsgnCstVl: number;
    initialWholNope: number;
    /** 위탁계약기간 초기값 (YYYYMMDD~YYYYMMDD) */
    initialPrxyCtrtCn: string;
    onConfirm?: (values: MainFacilityMappingSaveDialogValues) => void | Promise<void>;
}

function isValidYmd(ymd: string): boolean {
    if (!/^\d{8}$/.test(ymd)) return false;
    const y = Number(ymd.slice(0, 4));
    const m = Number(ymd.slice(4, 6));
    const d = Number(ymd.slice(6, 8));
    const dt = new Date(y, m - 1, d);
    return dt.getFullYear() === y && dt.getMonth() === m - 1 && dt.getDate() === d;
}

function validatePrxyCtrtCn(value: string): string | null {
    const t = value.trim();
    if (!t) return "위탁계약기간을 입력해 주세요.";
    if (!/^\d{8}~\d{8}$/.test(t)) {
        return "위탁계약기간은 YYYYMMDD~YYYYMMDD 형식으로 입력해 주세요. (예: 20240101~20281231)";
    }
    const start = t.slice(0, 8);
    const end = t.slice(9, 17);
    if (!isValidYmd(start) || !isValidYmd(end)) {
        return "시작일 또는 종료일이 유효한 날짜가 아닙니다.";
    }
    if (start > end) {
        return "시작일이 종료일보다 늦을 수 없습니다.";
    }
    return null;
}

export function MainFacilityMappingSaveDialog({
    open,
    onOpenChange,
    initialPrxyBzentyNmCn,
    initialCnsgnCstVl,
    initialWholNope,
    initialPrxyCtrtCn,
    onConfirm,
}: MainFacilityMappingSaveDialogProps) {
    const { setMessage: alert } = useAlertStore((state) => state);
    const [prxyBzentyNmCn, setPrxyBzentyNmCn] = useState("");
    const [cnsgnCstInput, setCnsgnCstInput] = useState("");
    const [wholNopeInput, setWholNopeInput] = useState("");
    const [prxyCtrtCn, setPrxyCtrtCn] = useState("");
    const [isSubmitting, setIsSubmitting] = useState(false);

    useEffect(() => {
        if (open) {
            setPrxyBzentyNmCn(initialPrxyBzentyNmCn ?? "");
            const initCost = Number(initialCnsgnCstVl);
            setCnsgnCstInput(
                initialCnsgnCstVl === null ||
                    initialCnsgnCstVl === undefined ||
                    Number.isNaN(initCost)
                    ? ""
                    : String(initCost),
            );
            setWholNopeInput(
                initialWholNope === null || initialWholNope === undefined || Number.isNaN(Number(initialWholNope))
                    ? ""
                    : String(initialWholNope),
            );
            setPrxyCtrtCn((initialPrxyCtrtCn ?? "").trim());
        }
    }, [open, initialPrxyBzentyNmCn, initialCnsgnCstVl, initialWholNope, initialPrxyCtrtCn]);

    const handleDialogOpenChange = (nextOpen: boolean) => {
        if (!nextOpen && !isSubmitting) {
            setPrxyBzentyNmCn("");
            setCnsgnCstInput("");
            setWholNopeInput("");
            setPrxyCtrtCn("");
        }
        onOpenChange(nextOpen);
    };

    const handleConfirm = async () => {
        const trimmedCost = cnsgnCstInput.trim();
        const cnsgnCstVl = trimmedCost === "" ? 0 : Number.parseFloat(trimmedCost.replace(/,/g, ""));
        if (!Number.isFinite(cnsgnCstVl) || cnsgnCstVl < 0) {
            alert("위탁비용은 0 이상의 숫자로 입력해 주세요.");
            return;
        }
        const trimmedWhol = wholNopeInput.trim();
        const wholNope = trimmedWhol === "" ? 0 : Number.parseInt(trimmedWhol, 10);
        if (!Number.isFinite(wholNope) || wholNope < 0) {
            alert("전체 인원은 0 이상의 정수로 입력해 주세요.");
            return;
        }
        const prxyCtrtErr = validatePrxyCtrtCn(prxyCtrtCn);
        if (prxyCtrtErr) {
            alert(prxyCtrtErr);
            return;
        }
        try {
            setIsSubmitting(true);
            await onConfirm?.({
                prxyBzentyNmCn: prxyBzentyNmCn.trim(),
                cnsgnCstVl,
                wholNope,
                prxyCtrtCn: prxyCtrtCn.trim(),
            });
        } finally {
            setIsSubmitting(false);
        }
    };

    return (
        <Dialog open={open} onOpenChange={handleDialogOpenChange}>
            <DialogContent className="max-w-[48rem]" aria-describedby={undefined}>
                <DialogHeader>
                    <DialogTitle>저장 정보 입력</DialogTitle>
                </DialogHeader>
                <div className="flex flex-col gap-4 py-2">
                    <div className="flex flex-col gap-2">
                        <Label className="text-label">위탁업체명</Label>
                        <Input
                            value={prxyBzentyNmCn}
                            onChange={(e) => setPrxyBzentyNmCn(e.target.value)}
                            className="!text-[1.3rem]"
                            placeholder="위탁사업자명을 입력하세요."
                            disabled={isSubmitting}
                        />
                    </div>
                    <div className="flex flex-col gap-2">
                        <Label className="text-label">위탁비용(백만원/년)</Label>
                        <Input
                            type="text"
                            inputMode="decimal"
                            value={cnsgnCstInput}
                            onChange={(e) => {
                                const v = e.target.value.replace(/[^\d.]/g, "");
                                const firstDot = v.indexOf(".");
                                const next =
                                    firstDot === -1
                                        ? v
                                        : v.slice(0, firstDot + 1) + v.slice(firstDot + 1).replace(/\./g, "");
                                setCnsgnCstInput(next);
                            }}
                            className="!text-[1.3rem]"
                            placeholder="0"
                            disabled={isSubmitting}
                        />
                    </div>
                    <div className="flex flex-col gap-2">
                        <Label className="text-label">전체 인원</Label>
                        <Input
                            type="text"
                            inputMode="numeric"
                            value={wholNopeInput}
                            onChange={(e) => {
                                const v = e.target.value.replace(/\D/g, "");
                                setWholNopeInput(v);
                            }}
                            className="!text-[1.3rem]"
                            placeholder="0"
                            disabled={isSubmitting}
                        />
                    </div>
                    <div className="flex flex-col gap-2">
                        <Label className="text-label">위탁계약기간</Label>
                        <Input
                            value={prxyCtrtCn}
                            onChange={(e) => setPrxyCtrtCn(e.target.value)}
                            className="!text-[1.3rem]"
                            placeholder="YYYYMMDD~YYYYMMDD (예: 20240101~20281231)"
                            autoComplete="off"
                            disabled={isSubmitting}
                        />
                    </div>
                </div>
                <DialogFooter>
                    <DialogClose asChild>
                        <Button type="button" color="gray" disabled={isSubmitting}>
                            취소
                        </Button>
                    </DialogClose>
                    <Button
                        type="button"
                        color="primary"
                        disabled={isSubmitting}
                        onClick={() => void handleConfirm()}
                    >
                        저장
                    </Button>
                </DialogFooter>
            </DialogContent>
        </Dialog>
    );
}