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

import {
    index,
    index as webFormProgressEventsIndex,
} from '@/actions/App/Http/Controllers/Admin/WebFormProgressEventController';
import HeadingSmall from '@/components/heading-small';
import { SortableHeader } from '@/components/sortable-header';
import { useUserTimezone } from '@/hooks/use-user-timezone';
import AppLayout from '@/layouts/app-layout';
import { formatDateTime } from '@/lib/format-date';
import { show as webFormSessionsShow } from '@/routes/admin/web-form-sessions';

type WebFormSessionRef = {
    id: number;
    session_id: string;
};

type WebFormProgressEvent = {
    id: number;
    session_id: string;
    session: WebFormSessionRef | null;
    event_type: string;
    field_name: string | null;
    sequence: number | null;
    meta: Record<string, unknown> | null;
    occurred_at: string | null;
    created_at: string;
};

type PaginatedEvents = {
    data: WebFormProgressEvent[];
    current_page: number;
    last_page: number;
    per_page: number;
    total: number;
    links: { url: string | null; label: string; active: boolean }[];
};

type Filters = {
    search: string;
    event_type: string;
    field_name: string;
    session_id: string;
    sort_by: string;
    sort_direction: string;
};

type Props = {
    events: PaginatedEvents;
    filters: Filters;
};

const breadcrumbs = [{ title: 'Web Form Progress Events', href: index.url() }];

const selectClasses =
    'rounded-md border border-zinc-200 bg-white px-3 py-2 text-sm shadow-sm dark:border-zinc-800 dark:bg-zinc-950 dark:text-zinc-100';

export default function WebFormProgressEvents({ events, filters }: Props) {
    const timezone = useUserTimezone();
    const [search, setSearch] = useState(filters.search);

    const sortColumn = filters.sort_by || 'created_at';
    const sortDirection = (filters.sort_direction || 'desc') as 'asc' | 'desc';

    function toggleSort(column: string) {
        if (column === sortColumn) {
            applyFilters({
                sort_by: column,
                sort_direction: sortDirection === 'asc' ? 'desc' : 'asc',
            });
        } else {
            applyFilters({ sort_by: column, sort_direction: 'asc' });
        }
    }

    function applyFilters(overrides: Partial<Filters> = {}) {
        const merged = { ...filters, ...overrides };

        router.get(
            webFormProgressEventsIndex.url(),
            Object.fromEntries(
                Object.entries(merged).filter(([, v]) => v !== ''),
            ),
            { preserveState: true, replace: true },
        );
    }

    const hasActiveFilters =
        filters.search ||
        filters.event_type ||
        filters.field_name ||
        filters.session_id;

    return (
        <AppLayout breadcrumbs={breadcrumbs}>
            <Head title="Web Form Progress Events" />

            <h1 className="sr-only">Web Form Progress Events</h1>

            <div className="space-y-6">
                <div className="flex flex-col gap-4 sm:flex-row sm:items-center sm:justify-between">
                    <HeadingSmall
                        title="Web Form Progress Events"
                        description="Search individual progress events across all web form sessions"
                    />

                    <div className="flex flex-col gap-3 sm:flex-row sm:flex-wrap sm:items-end">
                        <div className="flex flex-col gap-1 sm:min-w-60">
                            <label className="text-xs font-medium text-zinc-700 dark:text-zinc-300">
                                Search
                            </label>
                            <input
                                type="text"
                                value={search}
                                onChange={(e) => setSearch(e.target.value)}
                                onKeyDown={(e) => {
                                    if (e.key === 'Enter') {
                                        applyFilters({ search });
                                    }
                                }}
                                placeholder="Search session, type, field, or meta…"
                                className={selectClasses}
                            />
                        </div>

                        <button
                            type="button"
                            onClick={() => applyFilters({ search })}
                            className="rounded-md bg-zinc-900 px-3 py-2 text-sm font-medium text-white dark:bg-zinc-100 dark:text-zinc-900"
                        >
                            Search
                        </button>

                        {hasActiveFilters && (
                            <button
                                type="button"
                                onClick={() => {
                                    setSearch('');
                                    applyFilters({
                                        search: '',
                                        event_type: '',
                                        field_name: '',
                                        session_id: '',
                                    });
                                }}
                                className="rounded-md px-3 py-2 text-sm font-medium text-zinc-600 hover:text-zinc-900 dark:text-zinc-400 dark:hover:text-zinc-100"
                            >
                                Clear
                            </button>
                        )}
                    </div>
                </div>

                {filters.session_id && (
                    <div className="flex items-center gap-2 rounded-md border border-blue-200 bg-blue-50 px-3 py-2 text-sm text-blue-800 dark:border-blue-900 dark:bg-blue-950 dark:text-blue-300">
                        <span>
                            Showing events for session{' '}
                            <strong>{filters.session_id}</strong>
                        </span>
                        <button
                            type="button"
                            onClick={() => applyFilters({ session_id: '' })}
                            className="ml-auto text-blue-600 hover:text-blue-800 dark:text-blue-400 dark:hover:text-blue-200"
                        >
                            ✕
                        </button>
                    </div>
                )}

                <div className="overflow-hidden rounded-md border border-zinc-200 bg-white dark:border-zinc-800 dark:bg-zinc-950">
                    <div className="overflow-x-auto">
                        <table className="w-full text-left text-sm">
                            <thead className="border-b border-zinc-200 text-xs text-zinc-600 uppercase dark:border-zinc-800 dark:text-zinc-400">
                                <tr>
                                    <th className="px-4 py-3">Session</th>
                                    <SortableHeader
                                        label="Type"
                                        column="event_type"
                                        sortColumn={sortColumn}
                                        sortDirection={sortDirection}
                                        onSort={toggleSort}
                                    />
                                    <th className="px-4 py-3">Field</th>
                                    <th className="px-4 py-3">Meta</th>
                                    <SortableHeader
                                        label="Occurred"
                                        column="occurred_at"
                                        sortColumn={sortColumn}
                                        sortDirection={sortDirection}
                                        onSort={toggleSort}
                                    />
                                </tr>
                            </thead>
                            <tbody className="divide-y divide-zinc-200 dark:divide-zinc-800">
                                {events.data.map((event) => (
                                    <tr
                                        key={event.id}
                                        className="hover:bg-zinc-50 dark:hover:bg-zinc-900"
                                    >
                                        <td className="px-4 py-3">
                                            {event.session ? (
                                                <Link
                                                    href={webFormSessionsShow.url(
                                                        event.session.id,
                                                    )}
                                                    className="font-mono text-xs text-blue-600 hover:text-blue-800 hover:underline dark:text-blue-400 dark:hover:text-blue-300"
                                                >
                                                    {event.session.session_id}
                                                </Link>
                                            ) : (
                                                <span className="font-mono text-xs text-zinc-400">
                                                    {event.session_id}
                                                </span>
                                            )}
                                        </td>
                                        <td className="px-4 py-3 font-medium">
                                            {event.event_type}
                                        </td>
                                        <td className="px-4 py-3 text-zinc-600 dark:text-zinc-400">
                                            {event.field_name ?? '—'}
                                        </td>
                                        <td className="px-4 py-3">
                                            {event.meta ? (
                                                <pre className="max-w-md overflow-auto font-mono text-xs whitespace-pre-wrap text-zinc-600 dark:text-zinc-400">
                                                    {JSON.stringify(
                                                        event.meta,
                                                        null,
                                                        2,
                                                    )}
                                                </pre>
                                            ) : (
                                                <span className="text-zinc-400">
                                                    —
                                                </span>
                                            )}
                                        </td>
                                        <td className="px-4 py-3">
                                            {formatDateTime(
                                                event.occurred_at ??
                                                    event.created_at,
                                                timezone,
                                                { includeSeconds: true },
                                            )}
                                        </td>
                                    </tr>
                                ))}
                            </tbody>
                        </table>
                    </div>

                    {events.data.length === 0 && (
                        <div className="p-4 text-sm text-zinc-600 dark:text-zinc-400">
                            No progress events yet.
                        </div>
                    )}
                </div>

                {events.last_page > 1 && (
                    <div className="flex items-center justify-between text-sm">
                        <span className="text-zinc-500 dark:text-zinc-400">
                            Showing{' '}
                            {(events.current_page - 1) * events.per_page + 1}–
                            {Math.min(
                                events.current_page * events.per_page,
                                events.total,
                            )}{' '}
                            of {events.total}
                        </span>
                        <div className="flex gap-1">
                            {events.links.map((link) => (
                                <Link
                                    key={link.label}
                                    href={link.url ?? '#'}
                                    preserveState
                                    className={`rounded-md px-3 py-1.5 text-xs ${
                                        link.active
                                            ? 'bg-zinc-900 text-white dark:bg-zinc-100 dark:text-zinc-900'
                                            : link.url
                                              ? 'text-zinc-700 hover:bg-zinc-100 dark:text-zinc-300 dark:hover:bg-zinc-800'
                                              : 'pointer-events-none text-zinc-300 dark:text-zinc-700'
                                    }`}
                                    dangerouslySetInnerHTML={{
                                        __html: link.label,
                                    }}
                                />
                            ))}
                        </div>
                    </div>
                )}
            </div>
        </AppLayout>
    );
}
