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 { usePermission, useCreatePermission, useUpdatePermission } from '../core/_hooks';
import { PermissionFormData } from '../core/_models';
import { Button } from "@/components/ui/Button";
import { Input } from "@/components/ui/Input";
import { LoadingSpinner } from "@/components/ui/LoadingSpinner";
import { ArrowRight } from "lucide-react";
import { FormHeader, PageContainer, Label } from '../../../components/ui/Typography';

const permissionSchema = yup.object({
    title: yup.string().required('عنوان الزامی است').min(3, 'عنوان باید حداقل 3 کاراکتر باشد'),
    description: yup.string().required('توضیحات الزامی است').min(10, 'توضیحات باید حداقل 10 کاراکتر باشد'),
});

const PermissionFormPage = () => {
    const navigate = useNavigate();
    const { id } = useParams<{ id: string }>();
    const isEdit = !!id;

    const { data: permission, isLoading: isLoadingPermission } = usePermission(id || '', isEdit);
    const { mutate: createPermission, isPending: isCreating } = useCreatePermission();
    const { mutate: updatePermission, isPending: isUpdating } = useUpdatePermission();

    const isLoading = isCreating || isUpdating;

    const {
        register,
        handleSubmit,
        formState: { errors, isValid },
        setValue
    } = useForm<PermissionFormData>({
        resolver: yupResolver(permissionSchema),
        mode: 'onChange',
        defaultValues: {
            title: '',
            description: ''
        }
    });

    // Populate form when editing
    useEffect(() => {
        if (isEdit && permission) {
            setValue('title', permission.title);
            setValue('description', permission.description);
        }
    }, [isEdit, permission, setValue]);

    const onSubmit = (data: PermissionFormData) => {
        if (isEdit && id) {
            updatePermission({
                id,
                permissionData: {
                    id: parseInt(id),
                    title: data.title,
                    description: data.description
                }
            }, {
                onSuccess: () => {
                    navigate('/permissions');
                }
            });
        } else {
            createPermission({
                title: data.title,
                description: data.description
            }, {
                onSuccess: () => {
                    navigate('/permissions');
                }
            });
        }
    };

    const handleBack = () => {
        navigate('/permissions');
    };

    if (isEdit && isLoadingPermission) {
        return (
            <div className="flex justify-center items-center h-64">
                <LoadingSpinner />
            </div>
        );
    }

    return (
        <PageContainer>
            {/* Header */}
            <FormHeader
                title={isEdit ? 'ویرایش دسترسی' : 'ایجاد دسترسی جدید'}
                subtitle={isEdit ? 'ویرایش اطلاعات دسترسی' : 'اطلاعات دسترسی جدید را وارد کنید'}
                backButton={
                    <Button
                        variant="secondary"
                        onClick={handleBack}
                        className="flex items-center gap-2"
                    >
                        <ArrowRight className="h-4 w-4" />
                        بازگشت
                    </Button>
                }
            />

            {/* Form */}
            <div className="bg-white dark:bg-gray-800 shadow-sm border border-gray-200 dark:border-gray-700 rounded-lg p-6">
                <form onSubmit={handleSubmit(onSubmit)} className="space-y-6">
                    <Input
                        label="عنوان دسترسی"
                        {...register('title')}
                        error={errors.title?.message}
                        placeholder="مثال: CREATE_USER, DELETE_POST, MANAGE_ADMIN"
                    />

                    <div>
                        <Label htmlFor="description">
                            توضیحات
                        </Label>
                        <textarea
                            {...register('description')}
                            rows={4}
                            className="w-full px-3 py-2 border border-gray-300 dark:border-gray-600 rounded-md focus:outline-none focus:ring-1 focus:ring-primary-500 dark:bg-gray-700 dark:text-gray-100"
                            placeholder="توضیح کاملی از این دسترسی ارائه دهید..."
                        />
                        {errors.description && (
                            <p className="text-red-500 text-sm mt-1">{errors.description.message}</p>
                        )}
                    </div>

                    <div className="flex justify-end space-x-4 space-x-reverse pt-6 border-t border-gray-200 dark:border-gray-600">
                        <Button
                            type="button"
                            variant="secondary"
                            onClick={handleBack}
                            disabled={isLoading}
                        >
                            انصراف
                        </Button>
                        <Button
                            type="submit"
                            loading={isLoading}
                            disabled={!isValid}
                        >
                            {isEdit ? 'به‌روزرسانی' : 'ایجاد'}
                        </Button>
                    </div>
                </form>
            </div>
        </PageContainer>
    );
};

export default PermissionFormPage;