import { useEffect } from 'react';
import { useNavigate, useParams } from 'react-router-dom';
import { useForm } from 'react-hook-form';
import { yupResolver } from '@hookform/resolvers/yup';
import * as yup from 'yup';
import { useRole, useCreateRole, useUpdateRole } from '../core/_hooks';
import { RoleFormData } from '../core/_models';
import { Button } from "@/components/ui/Button";
import { Input } from "@/components/ui/Input";
import { ArrowRight, Shield } from "lucide-react";
import { FormHeader, PageContainer, Label } from '../../../components/ui/Typography';

const roleSchema = yup.object({
    title: yup
        .string()
        .required("نام نقش الزامی است")
        .min(2, "نام نقش باید حداقل ۲ کاراکتر باشد"),
    description: yup
        .string()
        .required("توضیحات الزامی است")
        .min(5, "توضیحات باید حداقل ۵ کاراکتر باشد"),
});

const RoleFormPage = () => {
    const navigate = useNavigate();
    const { id } = useParams();
    const isEdit = !!id;

    const { data: role, isLoading: roleLoading } = useRole(id || "");
    const { mutate: createRole, isPending: creating } = useCreateRole();
    const { mutate: updateRole, isPending: updating } = useUpdateRole();

    const {
        register,
        handleSubmit,
        formState: { errors, isValid },
        reset,
    } = useForm<RoleFormData>({
        resolver: yupResolver(roleSchema),
        mode: 'onChange',
    });

    useEffect(() => {
        if (isEdit && role) {
            reset({
                title: role.title,
                description: role.description,
            });
        }
    }, [isEdit, role, reset]);

    const onSubmit = (data: RoleFormData) => {
        if (isEdit && id) {
            updateRole({
                id: parseInt(id),
                ...data,
            }, {
                onSuccess: () => {
                    navigate('/roles');
                }
            });
        } else {
            createRole(data, {
                onSuccess: () => {
                    navigate('/roles');
                }
            });
        }
    };

    if (isEdit && roleLoading) {
        return (
            <PageContainer>
                <div className="space-y-6 animate-pulse">
                    <div className="h-8 bg-gray-200 dark:bg-gray-700 rounded w-48"></div>
                    <div className="card p-6 space-y-6">
                        {[...Array(3)].map((_, i) => (
                            <div key={i}>
                                <div className="h-4 bg-gray-200 dark:bg-gray-700 rounded w-32 mb-2"></div>
                                <div className="h-10 bg-gray-200 dark:bg-gray-700 rounded"></div>
                            </div>
                        ))}
                    </div>
                </div>
            </PageContainer>
        );
    }

    const isLoading = creating || updating;

    return (
        <PageContainer>
            <FormHeader
                title={isEdit ? 'ویرایش نقش' : 'ایجاد نقش جدید'}
                actions={
                    <Button
                        variant="secondary"
                        onClick={() => navigate('/roles')}
                        className="flex items-center gap-2"
                    >
                        <ArrowRight className="h-4 w-4" />
                        بازگشت
                    </Button>
                }
            />

            <div className="max-w-2xl">
                <div className="bg-white dark:bg-gray-800 rounded-lg shadow-md p-6">
                    <form onSubmit={handleSubmit(onSubmit)} className="space-y-6">
                        <Input
                            label="نام نقش"
                            type="text"
                            placeholder="نام نقش را وارد کنید"
                            error={errors.title?.message}
                            {...register('title')}
                        />

                        <div className="space-y-1">
                            <Label htmlFor="description">
                                توضیحات
                            </Label>
                            <textarea
                                id="description"
                                placeholder="توضیحات نقش را وارد کنید"
                                className={`w-full px-3 py-2 border rounded-lg focus:ring-2 focus:ring-primary-500 focus:border-primary-500 resize-none h-24 ${errors.description
                                    ? 'border-red-500 focus:ring-red-500 focus:border-red-500'
                                    : 'border-gray-300 dark:border-gray-600'
                                    } dark:bg-gray-700 dark:text-gray-100`}
                                {...register('description')}
                            />
                            {errors.description && (
                                <p className="text-sm text-red-600 dark:text-red-400">
                                    {errors.description.message}
                                </p>
                            )}
                        </div>

                        <div className="flex justify-end gap-3 pt-4">
                            <Button
                                type="button"
                                variant="secondary"
                                onClick={() => navigate('/roles')}
                            >
                                انصراف
                            </Button>
                            <Button
                                type="submit"
                                variant="primary"
                                loading={isLoading}
                                disabled={!isValid}
                            >
                                {isEdit ? 'به‌روزرسانی' : 'ایجاد'}
                            </Button>
                        </div>
                    </form>
                </div>
            </div>
        </PageContainer>
    );
};

export default RoleFormPage;