<?php

declare(strict_types=1);

namespace App\Http\Controllers\Admin;

use App\Enums\UserRole;
use App\Http\Controllers\Controller;
use App\Models\Artwork;
use App\Models\Story;
use App\Models\User;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Inertia\Inertia;
use Inertia\Response;

final class AdminController extends Controller
{
    // ── Dashboard ────────────────────────────────────────────────────────────

    public function dashboard(): Response
    {
        $stats = [
            'total_users'     => User::count(),
            'new_users_today' => User::whereDate('created_at', today())->count(),
            'staff_count'     => User::whereIn('role', ['admin', 'manager', 'editorial'])->count(),
            'moderator_count' => User::where('role', 'moderator')->count(),
        ];

        return Inertia::render('Admin/Dashboard', [
            'stats' => $stats,
        ]);
    }

    // ── Users ─────────────────────────────────────────────────────────────────

    public function users(Request $request): Response
    {
        $search = $request->string('search')->trim()->toString();
        $roleFilter = $request->string('role')->trim()->toString();

        $query = User::select('id', 'name', 'username', 'email', 'role', 'created_at', 'is_active')
            ->orderByDesc('created_at');

        if ($search !== '') {
            $query->where(function ($q) use ($search): void {
                $q->where('name', 'like', "%{$search}%")
                  ->orWhere('username', 'like', "%{$search}%")
                  ->orWhere('email', 'like', "%{$search}%");
            });
        }

        if ($roleFilter !== '' && $roleFilter !== 'all') {
            $query->where('role', $roleFilter);
        }

        $users = $query->paginate(50)->withQueryString();

        return Inertia::render('Admin/Users/Index', [
            'users'      => $users,
            'filters'    => ['search' => $search, 'role' => $roleFilter],
            'roles'      => collect(UserRole::cases())->map(fn ($r) => [
                'value' => $r->value,
                'label' => $r->label(),
                'badge' => $r->badgeClass(),
            ]),
        ]);
    }

    // ── Promote / Demote ──────────────────────────────────────────────────────

    public function updateRole(Request $request, User $user): RedirectResponse
    {
        $request->validate([
            'role' => ['required', 'string', 'in:' . implode(',', array_column(UserRole::cases(), 'value'))],
        ]);

        /** @var \App\Models\User $actor */
        $actor = $request->user();

        // Only admins can set the 'admin' role.
        if ($request->input('role') === UserRole::Admin->value && ! $actor->isAdmin()) {
            abort(403, 'Only admins can grant the Admin role.');
        }

        // Prevent self-demotion.
        if ($actor->id === $user->id) {
            return back()->with('error', 'You cannot change your own role.');
        }

        $user->update(['role' => $request->input('role')]);

        return back()->with('success', "Role updated to \"{$request->input('role')}\" for {$user->name}.");
    }

    // ── Stories ───────────────────────────────────────────────────────────────

    public function stories(Request $request): Response
    {
        $stories = Story::with('creator:id,name,username')
            ->select('id', 'title', 'status', 'published_at', 'creator_id')
            ->orderByDesc('created_at')
            ->paginate(50)
            ->withQueryString();

        return Inertia::render('Admin/Stories', [
            'stories' => $stories,
        ]);
    }

    // ── Artworks ──────────────────────────────────────────────────────────────

    public function artworks(Request $request): Response
    {
        $artworks = Artwork::with('user:id,name,username')
            ->select('id', 'title', 'artwork_status', 'created_at', 'user_id', 'hash', 'thumb_ext')
            ->orderByDesc('created_at')
            ->paginate(50)
            ->withQueryString();

        // Normalise status field and add thumb URL
        $artworks->getCollection()->transform(function ($artwork) {
            return [
                'id'         => $artwork->id,
                'title'      => $artwork->title,
                'status'     => $artwork->artwork_status,
                'thumb'      => $artwork->thumbUrl('sm') ?? null,
                'created_at' => $artwork->created_at,
                'user'       => $artwork->user,
            ];
        });

        return Inertia::render('Admin/Artworks', [
            'artworks' => $artworks,
        ]);
    }

    // ── Username Queue ────────────────────────────────────────────────────────

    public function usernameQueue(): Response
    {
        return Inertia::render('Admin/UsernameQueue');
    }

    // ── Upload Queue ──────────────────────────────────────────────────────────

    public function uploadQueue(): Response
    {
        return Inertia::render('Admin/UploadQueue');
    }

    // ── Settings ──────────────────────────────────────────────────────────────

    public function settings(): Response
    {
        return Inertia::render('Admin/Settings', [
            'settings' => [],
        ]);
    }
}