<?php

declare(strict_types=1);

namespace App\Services;

use App\Data\Ui\Dashboard\{DashboardStatsData, LatestUserData};
use App\Data\Ui\ManageRoles\{RoleData, ServiceData};
use App\Data\Users\UserData;
use App\Enums\RolesStatusEnum;
use App\Models\{ConnectedApp, RestrictedUserPermission, Role, User};
use Spatie\LaravelData\DataCollection;

final class AdminDashboardService
{
    /**
     * Get statistics for the dashboard.
     */
    public function getStats(): DashboardStatsData
    {
        $totalUsers = User::query()->count();
        $activeRoles = Role::query()->count();
        $servicesCount = ConnectedApp::query()->count();
        $revokedTodayCount = RestrictedUserPermission::query()
            ->whereDate('created_at', today())
            ->count();

        return new DashboardStatsData(
            totalUsers: $totalUsers,
            activeRoles: $activeRoles,
            servicesCount: $servicesCount,
            revokedTodayCount: $revokedTodayCount,
        );
    }

    /**
     * Get all roles mapped to DTOs for the roles manager.
     *
     * @return DataCollection<int, RoleData>
     */
    public function getRoles(): DataCollection
    {
        $roles = Role::query()
            ->visible()
            ->with(['users', 'apps'])
            ->get();

        $mappedRoles = $roles->map(function ($role) {
            /** @var Role $role */
            /** @var \Illuminate\Database\Eloquent\Collection<int, User> $users */
            $users = $role->users;
            /** @var \Illuminate\Database\Eloquent\Collection<int, ConnectedApp> $apps */
            $apps = $role->apps;

            return new RoleData(
                name: $role->name,
                users: UserData::collect($users->map(fn ($user) => new UserData(
                    name: $user->name,
                    email: $user->email,
                    active: true,
                )), DataCollection::class),
                services: ServiceData::collect($apps->map(fn ($app) => new ServiceData(
                    name: $app->name,
                )), DataCollection::class),
                status: RolesStatusEnum::Active,
            );
        });

        return RoleData::collect($mappedRoles, DataCollection::class);
    }

    /**
     * Get the latest registered users.
     *
     * @return DataCollection<int, LatestUserData>
     */
    public function getLatestUsers(): DataCollection
    {
        $users = User::query()
            ->with(['roles'])
            ->orderBy('created_at', 'desc')
            ->take(5)
            ->get();

        $mappedUsers = $users->map(function ($user) {
            /** @var User $user */
            /** @var \Illuminate\Database\Eloquent\Collection<int, Role> $roles */
            $roles = $user->roles;

            return new LatestUserData(
                name: $user->name,
                email: $user->email,
                initials: $user->initials(),
                registeredAt: $user->created_at ? $user->created_at->diffForHumans() : 'unknown',
                roles: RoleData::collect($roles->map(fn ($role) => new RoleData(
                    name: $role->name,
                    users: UserData::collect([], DataCollection::class),
                    services: ServiceData::collect([], DataCollection::class),
                    status: RolesStatusEnum::Active,
                )), DataCollection::class),
            );
        });

        return LatestUserData::collect($mappedUsers, DataCollection::class);
    }

    /**
     * Get all user role and service assignments.
     *
     * @return DataCollection<int, UserData>
     */
    public function getUserAssignments(): DataCollection
    {
        $users = User::query()
            ->with(['roles.apps'])
            ->orderBy('id')
            ->get();

        $mappedUsers = $users->map(function ($user) {
            /** @var User $user */
            /** @var \Illuminate\Database\Eloquent\Collection<int, Role> $roles */
            $roles = $user->roles;

            return new UserData(
                name: $user->name,
                email: $user->email,
                active: true,
                roles: RoleData::collect($roles->map(function ($role) {
                    /** @var Role $role */
                    /** @var \Illuminate\Database\Eloquent\Collection<int, ConnectedApp> $apps */
                    $apps = $role->apps;

                    return new RoleData(
                        name: $role->name,
                        users: UserData::collect([], DataCollection::class),
                        services: ServiceData::collect($apps->map(fn ($app) => new ServiceData(
                            name: $app->name,
                        )), DataCollection::class),
                        status: RolesStatusEnum::Active,
                    );
                }), DataCollection::class),
            );
        });

        return UserData::collect($mappedUsers, DataCollection::class);
    }
}