<?php
/**
 * The Usage page.
 *
 * @package MazeAi
 * @since   0.1.0
 */

declare(strict_types=1);

namespace MazeAi\Http\Controllers;

defined('ABSPATH') || exit;

use Illuminate\MazeAssistant\Http\JsonResponse;
use Illuminate\MazeAssistant\Http\Request;
use Illuminate\MazeAssistant\Routing\Controller;
use MazeAi\Jobs\Pipelines\UsageRollup;
use MazeAi\Platform\Extensions;
use MazeAi\Support\Access;

/**
 * `GET /usage?days=7|30|90&scope=site`: tokens and messages per day, model and person over the selected days. Finished
 * days use the roll-up; today's partial totals are read live. A person sees their own; managers may see the site's.
 * The API returns token counts; current-rate cost estimates are derived separately in the UI.
 *
 * @since 0.1.0
 */
class UsageController extends Controller
{
    public function show(Request $request, UsageRollup $usage, Extensions $extensions): JsonResponse
    {
        if (!$extensions->modules()->enabled('usage')) {
            return $this->error(__('The Usage page is switched off. An administrator can switch it on in Tools → Extensions.', 'maze-graph'), 503);
        }
        $days   = in_array((int) $request->input('days', 30), [7, 30, 90], true) ? (int) $request->input('days', 30) : 30;
        $site   = $request->input('scope') === 'site' && current_user_can(Access::MANAGE);
        $report = $usage->report($days, $site ? 0 : $this->userId(), true);

        $people = [];
        foreach ($report['people'] as $row) {
            $user     = get_userdata($row['user']);
            $people[] = ['name' => $user instanceof \WP_User ? $user->display_name : '#' . $row['user']] + array_diff_key($row, ['user' => 0]);
        }

        return $this->ok([
            'days'   => $days,
            'site'   => $site,
            'series' => $report['days'],
            'models' => $report['models'],
            'people' => $site ? $people : [],
            'totals' => [
                'tokens_in'  => array_sum(array_column($report['days'], 'tokens_in')),
                'tokens_out' => array_sum(array_column($report['days'], 'tokens_out')),
                'messages'   => array_sum(array_column($report['days'], 'messages')),
            ],
        ]);
    }
}