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

import { ConfigurableTable } from '@/components/ui/configurable-table';
import { PaginationLinks } from '@/components/ui/pagination-links';
import { AdminLayout } from '@/layouts/admin-layout';
import type { PaginatedData } from '@/types';

type Option = {
    value: string;
    label: string;
};

type AISuggestionRow = {
    id: number;
    title: string | null;
    request_type: string;
    request_type_label: string;
    status: string;
    status_label: string;
    subject_type_label: string | null;
    subject_label: string | null;
    model: string | null;
    user: string | null;
    created_at: string | null;
    reviewed_at: string | null;
};

type AIContentIndexProps = {
    suggestions: PaginatedData<AISuggestionRow>;
    filters: {
        search: string;
        request_type: string;
        status: string;
    };
    requestTypeOptions: Option[];
    statusOptions: Option[];
};

export default function AIContentIndex({
    suggestions,
    filters,
    requestTypeOptions,
    statusOptions,
}: AIContentIndexProps) {
    const [search, setSearch] = useState(filters.search || '');
    const [requestType, setRequestType] = useState(filters.request_type || '');
    const [status, setStatus] = useState(filters.status || '');

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

        router.get(
            '/admin/ai-content',
            buildParams({ search, request_type: requestType, status }),
            {
                preserveState: true,
                preserveScroll: true,
                replace: true,
            },
        );
    };

    const deleteSuggestion = (id: number) => {
        if (!window.confirm('Delete this AI content suggestion?')) {
            return;
        }

        router.delete(`/admin/ai-content/${id}`);
    };

    return (
        <AdminLayout>
            <Head title="AI Content" />

            <div className="space-y-5">
                <div className="flex flex-wrap items-center justify-between gap-3">
                    <div>
                        <h1 className="text-2xl font-semibold text-[#0a1530] dark:text-[#efe8ff]">
                            AI Content
                        </h1>
                        <p className="mt-1 text-sm text-slate-600 dark:text-[#c7bde8]">
                            Generate reviewable drafts, product descriptions,
                            SEO suggestions, and FAQs.
                        </p>
                    </div>
                    <Link
                        href="/admin/ai-content/create"
                        className="rounded-lg bg-[#0b7285] px-4 py-2 text-sm font-semibold text-white hover:bg-[#095f6f] dark:bg-[#7c3aed] dark:hover:bg-[#8b5cf6]"
                    >
                        Generate Suggestion
                    </Link>
                </div>

                <div className="rounded-xl border border-amber-200 bg-amber-50 p-4 text-sm text-amber-900 dark:border-amber-500/40 dark:bg-amber-500/10 dark:text-amber-100">
                    AI output is never published or applied automatically.
                    Review suggestions here, then explicitly apply supported
                    fields to the linked product or article when the content is
                    accurate.
                </div>

                <form
                    onSubmit={submitFilters}
                    className="grid gap-2 lg:grid-cols-[1fr_220px_180px_auto]"
                >
                    <input
                        value={search}
                        onChange={(event) => setSearch(event.target.value)}
                        placeholder="Search title or prompt"
                        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]"
                    />
                    <select
                        value={requestType}
                        onChange={(event) => setRequestType(event.target.value)}
                        className="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="">All types</option>
                        {requestTypeOptions.map((option) => (
                            <option key={option.value} value={option.value}>
                                {option.label}
                            </option>
                        ))}
                    </select>
                    <select
                        value={status}
                        onChange={(event) => setStatus(event.target.value)}
                        className="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="">All statuses</option>
                        {statusOptions.map((option) => (
                            <option key={option.value} value={option.value}>
                                {option.label}
                            </option>
                        ))}
                    </select>
                    <button
                        type="submit"
                        className="rounded-lg border border-slate-300 px-3 py-2 text-sm font-medium text-slate-700 hover:bg-slate-100 dark:border-[#4a3a78] dark:text-[#e5dcff] dark:hover:bg-[#2a1d50]"
                    >
                        Filter
                    </button>
                </form>

                <div className="space-y-3 md:hidden">
                    {suggestions.data.map((suggestion) => (
                        <article
                            key={suggestion.id}
                            className="rounded-xl border border-slate-200 bg-white p-4 dark:border-[#3c2b68] dark:bg-[#211740]"
                        >
                            <p className="font-semibold text-[#0a1530] dark:text-[#efe8ff]">
                                {suggestion.title || 'Untitled suggestion'}
                            </p>
                            <p className="text-xs text-slate-500 dark:text-[#bcaee6]">
                                {suggestion.request_type_label}
                            </p>
                            <div className="mt-3 grid grid-cols-2 gap-2 text-xs text-slate-700 dark:text-[#c7bde8]">
                                <p>Status: {suggestion.status_label}</p>
                                <p>
                                    Subject: {suggestion.subject_label || '-'}
                                </p>
                                <p>Model: {suggestion.model || '-'}</p>
                                <p>Created: {suggestion.created_at || '-'}</p>
                            </div>
                            <Actions
                                id={suggestion.id}
                                onDelete={deleteSuggestion}
                            />
                        </article>
                    ))}
                </div>

                <ConfigurableTable
                    tableId="admin-ai-content"
                    className="hidden overflow-x-auto rounded-xl border border-slate-200 md:block dark:border-[#3c2b68]"
                >
                    <table className="min-w-full divide-y divide-slate-200 text-sm dark:divide-[#3c2b68]">
                        <thead className="bg-slate-50 dark:bg-[#2a1d50]/70">
                            <tr>
                                <th className="px-4 py-3 text-left font-medium text-slate-700 dark:text-[#c7bde8]">
                                    Suggestion
                                </th>
                                <th className="px-4 py-3 text-left font-medium text-slate-700 dark:text-[#c7bde8]">
                                    Type
                                </th>
                                <th className="px-4 py-3 text-left font-medium text-slate-700 dark:text-[#c7bde8]">
                                    Status
                                </th>
                                <th className="px-4 py-3 text-left font-medium text-slate-700 dark:text-[#c7bde8]">
                                    Subject
                                </th>
                                <th className="px-4 py-3 text-left font-medium text-slate-700 dark:text-[#c7bde8]">
                                    Model
                                </th>
                                <th className="px-4 py-3 text-left font-medium text-slate-700 dark:text-[#c7bde8]">
                                    Actions
                                </th>
                            </tr>
                        </thead>
                        <tbody className="divide-y divide-slate-100 bg-white dark:divide-[#3c2b68] dark:bg-[#211740]">
                            {suggestions.data.map((suggestion) => (
                                <tr key={suggestion.id}>
                                    <td className="px-4 py-3">
                                        <p className="font-medium text-[#0a1530] dark:text-[#efe8ff]">
                                            {suggestion.title ||
                                                'Untitled suggestion'}
                                        </p>
                                        <p className="text-xs text-slate-500 dark:text-[#bcaee6]">
                                            By {suggestion.user || 'Unknown'} on{' '}
                                            {suggestion.created_at || '-'}
                                        </p>
                                    </td>
                                    <td className="px-4 py-3 text-slate-700 dark:text-[#c7bde8]">
                                        {suggestion.request_type_label}
                                    </td>
                                    <td className="px-4 py-3">
                                        <StatusBadge
                                            status={suggestion.status}
                                            label={suggestion.status_label}
                                        />
                                    </td>
                                    <td className="px-4 py-3 text-slate-700 dark:text-[#c7bde8]">
                                        <p>{suggestion.subject_label || '-'}</p>
                                        {suggestion.subject_type_label ? (
                                            <p className="text-xs text-slate-500 dark:text-[#bcaee6]">
                                                {suggestion.subject_type_label}
                                            </p>
                                        ) : null}
                                    </td>
                                    <td className="px-4 py-3 text-slate-700 dark:text-[#c7bde8]">
                                        {suggestion.model || '-'}
                                    </td>
                                    <td className="px-4 py-3">
                                        <Actions
                                            id={suggestion.id}
                                            onDelete={deleteSuggestion}
                                        />
                                    </td>
                                </tr>
                            ))}
                        </tbody>
                    </table>
                </ConfigurableTable>

                <div className="flex flex-col gap-3 sm:flex-row sm:items-center sm:justify-between">
                    <p className="text-sm text-slate-600 dark:text-[#c7bde8]">
                        Showing {suggestions.from || 0} to {suggestions.to || 0}{' '}
                        of {suggestions.total} suggestions
                    </p>
                    <PaginationLinks links={suggestions.links} />
                </div>
            </div>
        </AdminLayout>
    );
}

function Actions({
    id,
    onDelete,
}: {
    id: number;
    onDelete: (id: number) => void;
}) {
    return (
        <div className="mt-4 flex gap-2 md:mt-0">
            <Link
                href={`/admin/ai-content/${id}`}
                className="rounded-md border border-slate-300 px-2.5 py-1 text-xs font-medium text-slate-700 hover:bg-slate-100 dark:border-[#4a3a78] dark:text-[#e5dcff] dark:hover:bg-[#2a1d50]"
            >
                Review
            </Link>
            <button
                type="button"
                onClick={() => onDelete(id)}
                className="rounded-md border border-rose-200 px-2.5 py-1 text-xs font-medium text-rose-700 hover:bg-rose-50"
            >
                Delete
            </button>
        </div>
    );
}

function StatusBadge({ status, label }: { status: string; label: string }) {
    const classes =
        status === 'reviewed'
            ? 'border-emerald-200 bg-emerald-50 text-emerald-700 dark:border-emerald-400/40 dark:bg-emerald-400/10 dark:text-emerald-200'
            : status === 'applied'
              ? 'border-sky-200 bg-sky-50 text-sky-700 dark:border-sky-400/40 dark:bg-sky-400/10 dark:text-sky-200'
              : status === 'archived'
                ? 'border-slate-200 bg-slate-50 text-slate-600 dark:border-slate-400/40 dark:bg-slate-400/10 dark:text-slate-200'
                : 'border-amber-200 bg-amber-50 text-amber-700 dark:border-amber-400/40 dark:bg-amber-400/10 dark:text-amber-200';

    return (
        <span
            className={`rounded-full border px-2 py-1 text-xs font-semibold ${classes}`}
        >
            {label}
        </span>
    );
}

function buildParams(filters: {
    search: string;
    request_type: string;
    status: string;
}) {
    const params: Record<string, string> = {};

    if (filters.search !== '') {
        params.search = filters.search;
    }

    if (filters.request_type !== '') {
        params.request_type = filters.request_type;
    }

    if (filters.status !== '') {
        params.status = filters.status;
    }

    return params;
}
