import { Head, Link, useForm } from '@inertiajs/react';

import { Switch } from '@/components/ui/switch';
import { AdminLayout } from '@/layouts/admin-layout';

type CategoryOption = {
    id: number;
    name: string;
};

type CategoryCreateProps = {
    parentOptions: CategoryOption[];
};

type CategoryForm = {
    parent_id: string;
    name: string;
    slug: string;
    description: string;
    seo_title: string;
    meta_description: string;
    meta_keywords: string;
    is_active: boolean;
    sort_order: string;
};

export default function CategoryCreate({ parentOptions }: CategoryCreateProps) {
    const form = useForm<CategoryForm>({
        parent_id: '',
        name: '',
        slug: '',
        description: '',
        seo_title: '',
        meta_description: '',
        meta_keywords: '',
        is_active: true,
        sort_order: '0',
    });

    const submit = (event: React.FormEvent<HTMLFormElement>) => {
        event.preventDefault();

        form.transform((data) => ({
            ...data,
            parent_id: data.parent_id === '' ? null : Number(data.parent_id),
            sort_order: data.sort_order === '' ? 0 : Number(data.sort_order),
            seo_title: data.seo_title === '' ? null : data.seo_title,
            meta_description:
                data.meta_description === '' ? null : data.meta_description,
            meta_keywords:
                data.meta_keywords === '' ? null : data.meta_keywords,
        }));

        form.post('/admin/categories');
    };

    return (
        <AdminLayout>
            <Head title="Create Category" />

            <div className="space-y-5">
                <div className="flex flex-wrap items-center justify-between gap-3">
                    <h1 className="text-2xl font-semibold text-[#0a1530] dark:text-[#efe8ff]">
                        Create Category
                    </h1>
                    <Link
                        href="/admin/categories"
                        className="text-sm font-medium text-slate-600 hover:text-[#0a1530] dark:text-[#d7c7ff] dark:hover:text-[#efe8ff]"
                    >
                        Back to list
                    </Link>
                </div>

                <form onSubmit={submit} className="space-y-4">
                    <div className="grid gap-4 md:grid-cols-2">
                        <Field label="Name" error={form.errors.name}>
                            <input
                                value={form.data.name}
                                onChange={(event) =>
                                    form.setData('name', event.target.value)
                                }
                                className="w-full rounded-lg border border-slate-300 bg-white px-3 py-2 text-sm text-[#0a1530] outline-none focus:border-[#0b7285] dark:border-[#4a3a78] dark:bg-[#160f2d] dark:text-[#efe8ff] dark:focus:border-[#a78bfa]"
                                required
                            />
                        </Field>
                        <Field label="Slug" error={form.errors.slug}>
                            <input
                                value={form.data.slug}
                                onChange={(event) =>
                                    form.setData('slug', event.target.value)
                                }
                                className="w-full rounded-lg border border-slate-300 bg-white px-3 py-2 text-sm text-[#0a1530] outline-none focus:border-[#0b7285] dark:border-[#4a3a78] dark:bg-[#160f2d] dark:text-[#efe8ff] dark:focus:border-[#a78bfa]"
                                placeholder="Optional"
                            />
                        </Field>
                    </div>

                    <div className="grid gap-4 md:grid-cols-2">
                        <Field
                            label="Parent Category"
                            error={form.errors.parent_id}
                        >
                            <select
                                value={form.data.parent_id}
                                onChange={(event) =>
                                    form.setData(
                                        'parent_id',
                                        event.target.value,
                                    )
                                }
                                className="w-full rounded-lg border border-slate-300 bg-white px-3 py-2 text-sm text-[#0a1530] outline-none focus:border-[#0b7285] dark:border-[#4a3a78] dark:bg-[#160f2d] dark:text-[#efe8ff] dark:focus:border-[#a78bfa]"
                            >
                                <option value="">Top-level category</option>
                                {parentOptions.map((option) => (
                                    <option key={option.id} value={option.id}>
                                        {option.name}
                                    </option>
                                ))}
                            </select>
                        </Field>
                        <Field
                            label="Sort Order"
                            error={form.errors.sort_order}
                        >
                            <input
                                type="number"
                                min={0}
                                value={form.data.sort_order}
                                onChange={(event) =>
                                    form.setData(
                                        'sort_order',
                                        event.target.value,
                                    )
                                }
                                className="w-full rounded-lg border border-slate-300 bg-white px-3 py-2 text-sm text-[#0a1530] outline-none focus:border-[#0b7285] dark:border-[#4a3a78] dark:bg-[#160f2d] dark:text-[#efe8ff] dark:focus:border-[#a78bfa]"
                            />
                        </Field>
                    </div>

                    <Field label="Description" error={form.errors.description}>
                        <textarea
                            value={form.data.description}
                            onChange={(event) =>
                                form.setData('description', event.target.value)
                            }
                            className="h-28 w-full rounded-lg border border-slate-300 bg-white px-3 py-2 text-sm text-[#0a1530] outline-none focus:border-[#0b7285] dark:border-[#4a3a78] dark:bg-[#160f2d] dark:text-[#efe8ff] dark:focus:border-[#a78bfa]"
                        />
                    </Field>

                    <div className="space-y-4 rounded-2xl border border-slate-200 bg-slate-50/70 p-4 dark:border-[#3c2b68] dark:bg-[#2a1d50]/35">
                        <div>
                            <h2 className="text-base font-semibold text-[#0a1530] dark:text-[#efe8ff]">
                                SEO Metadata
                            </h2>
                            <p className="text-sm text-slate-600 dark:text-[#c7bde8]">
                                Optional metadata used when this category is
                                selected in the catalog.
                            </p>
                        </div>

                        <Field label="SEO Title" error={form.errors.seo_title}>
                            <input
                                value={form.data.seo_title}
                                onChange={(event) =>
                                    form.setData(
                                        'seo_title',
                                        event.target.value,
                                    )
                                }
                                className="w-full rounded-lg border border-slate-300 bg-white px-3 py-2 text-sm text-[#0a1530] outline-none focus:border-[#0b7285] dark:border-[#4a3a78] dark:bg-[#160f2d] dark:text-[#efe8ff] dark:focus:border-[#a78bfa]"
                                placeholder="Optional, defaults to category name"
                            />
                        </Field>

                        <Field
                            label="Meta Description"
                            error={form.errors.meta_description}
                        >
                            <textarea
                                value={form.data.meta_description}
                                onChange={(event) =>
                                    form.setData(
                                        'meta_description',
                                        event.target.value,
                                    )
                                }
                                className="h-24 w-full rounded-lg border border-slate-300 bg-white px-3 py-2 text-sm text-[#0a1530] outline-none focus:border-[#0b7285] dark:border-[#4a3a78] dark:bg-[#160f2d] dark:text-[#efe8ff] dark:focus:border-[#a78bfa]"
                                placeholder="Optional search result summary"
                            />
                        </Field>

                        <Field
                            label="Meta Keywords"
                            error={form.errors.meta_keywords}
                        >
                            <input
                                value={form.data.meta_keywords}
                                onChange={(event) =>
                                    form.setData(
                                        'meta_keywords',
                                        event.target.value,
                                    )
                                }
                                className="w-full rounded-lg border border-slate-300 bg-white px-3 py-2 text-sm text-[#0a1530] outline-none focus:border-[#0b7285] dark:border-[#4a3a78] dark:bg-[#160f2d] dark:text-[#efe8ff] dark:focus:border-[#a78bfa]"
                                placeholder="Optional comma-separated keywords"
                            />
                        </Field>
                    </div>

                    <div className="mt-2 rounded-xl border border-slate-200 bg-slate-50/80 p-4 dark:border-[#3c2b68] dark:bg-[#2a1d50]/40">
                        <div className="flex flex-col gap-4 md:flex-row md:items-center md:justify-between">
                            <div className="inline-flex items-center gap-3 text-sm text-slate-700 dark:text-[#d7c7ff]">
                                <Switch
                                    checked={form.data.is_active}
                                    onChange={(checked) =>
                                        form.setData('is_active', checked)
                                    }
                                    ariaLabel="Active category"
                                />
                                Active category
                            </div>

                            <button
                                type="submit"
                                disabled={form.processing}
                                className="w-full rounded-lg bg-[#0b7285] px-4 py-2 text-sm font-semibold text-white hover:bg-[#095f6f] disabled:opacity-50 md:w-auto dark:bg-[#7c3aed] dark:hover:bg-[#8b5cf6]"
                            >
                                {form.processing
                                    ? 'Saving...'
                                    : 'Create Category'}
                            </button>
                        </div>
                    </div>
                </form>
            </div>
        </AdminLayout>
    );
}

function Field({
    label,
    error,
    children,
}: {
    label: string;
    error?: string;
    children: React.ReactNode;
}) {
    return (
        <div>
            <label className="block text-sm font-medium text-[#0a1530] dark:text-[#e5dcff]">
                {label}
            </label>
            <div className="mt-1">{children}</div>
            {error ? (
                <p className="mt-1 text-xs text-rose-600">{error}</p>
            ) : null}
        </div>
    );
}
