<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Concerns\PortalAware;
use App\Http\Controllers\Controller;
use App\Models\Device;
use App\Models\PageVisit;
use App\Models\User;
use App\Support\AgentScope;
use Carbon\Carbon;
use Illuminate\Http\Request;

class DashboardController extends Controller
{
    use PortalAware;

    public function index()
    {
        $agents = $this->isAgentPortal()
            ? collect()
            : User::query()->orderBy('username')->get(['id', 'username']);

        return view('admin.dashboard.index', [
            'portal' => $this->portal(),
            'agents' => $agents,
        ]);
    }

    public function data(Request $request)
    {
        $range = (string) $request->query('range', '30d');
        [$from, $to] = $this->rangeBounds($range);

        $channelId = trim((string) $request->query('channel_id', ''));
        $agentUserId = $this->isAgentPortal()
            ? (int) ($this->agent()?->id ?? 0)
            : (int) $request->query('agent_user_id', 0);

        $base = Device::query();
        AgentScope::applyDeviceChannelScope($base, $this->agent());
        if (! $this->isAgentPortal() && $agentUserId > 0) {
            AgentScope::applyAgentUserFilter($base, $agentUserId);
        }
        if ($channelId !== '') {
            $base->where('channel_id', 'like', '%'.$channelId.'%');
        }

        $total = (clone $base)->count();
        $newCount = (clone $base)->whereBetween('created_at', [$from, $to])->count();
        $activeCount = (clone $base)->whereBetween('updated_at', [$from, $to])->count();

        $visits = PageVisit::query();
        AgentScope::applyChannelIdScope($visits, $this->agent());
        if (! $this->isAgentPortal() && $agentUserId > 0) {
            AgentScope::applyChannelIdAgentUserFilter($visits, $agentUserId);
        }
        if ($channelId !== '') {
            $visits->where('channel_id', 'like', '%'.$channelId.'%');
        }
        $visits->whereBetween('created_at', [$from, $to]);

        $pv = (clone $visits)->count();
        $uv = (int) (clone $visits)->selectRaw('COUNT(DISTINCT client_uid) as aggregate')->value('aggregate');

        $byOs = (clone $visits)
            ->select('os')
            ->selectRaw('COUNT(*) as pv')
            ->selectRaw('COUNT(DISTINCT client_uid) as uv')
            ->groupBy('os')
            ->orderByDesc('pv')
            ->limit(10)
            ->get()
            ->map(static fn ($r) => [
                'label' => ((string) ($r->os ?? '')) !== '' ? (string) $r->os : 'Unknown',
                'pv' => (int) $r->pv,
                'uv' => (int) $r->uv,
            ])
            ->values();

        $byBrowser = (clone $visits)
            ->select('browser')
            ->selectRaw('COUNT(*) as pv')
            ->selectRaw('COUNT(DISTINCT client_uid) as uv')
            ->groupBy('browser')
            ->orderByDesc('pv')
            ->limit(10)
            ->get()
            ->map(static fn ($r) => [
                'label' => ((string) ($r->browser ?? '')) !== '' ? (string) $r->browser : 'Unknown',
                'pv' => (int) $r->pv,
                'uv' => (int) $r->uv,
            ])
            ->values();

        return response()->json([
            'code' => 0,
            'msg' => '',
            'data' => [
                'total' => $total,
                'new_count' => $newCount,
                'active_count' => $activeCount,
                'pv' => $pv,
                'uv' => $uv,
                'by_os' => $byOs,
                'by_browser' => $byBrowser,
                'range' => $range,
                'from' => $from->toDateTimeString(),
                'to' => $to->toDateTimeString(),
            ],
        ]);
    }

    /**
     * @return array{0: Carbon, 1: Carbon}
     */
    private function rangeBounds(string $range): array
    {
        $now = Carbon::now();

        return match ($range) {
            'today' => [$now->copy()->startOfDay(), $now->copy()->endOfDay()],
            'yesterday' => [
                $now->copy()->subDay()->startOfDay(),
                $now->copy()->subDay()->endOfDay(),
            ],
            '7d' => [$now->copy()->subDays(6)->startOfDay(), $now->copy()->endOfDay()],
            default => [$now->copy()->subDays(29)->startOfDay(), $now->copy()->endOfDay()],
        };
    }
}