<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Concerns\PortalAware;
use App\Http\Controllers\Controller;
use App\Models\PageVisit;
use App\Models\User;
use App\Support\AgentScope;
use Carbon\Carbon;
use Illuminate\Http\Request;
class PageVisitController extends Controller
{
    use PortalAware;

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

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

    public function data(Request $request)
    {
        $q = $this->scopedQuery($request);
        $limit = min(100, max(1, (int) $request->query('limit', 20)));
        $page = max(1, (int) $request->query('page', 1));

        $total = (clone $q)->count();
        $rows = (clone $q)
            ->orderByDesc('id')
            ->forPage($page, $limit)
            ->get([
                'id', 'channel_id', 'client_uid', 'os', 'os_version',
                'browser', 'browser_version', 'user_agent', 'ip', 'path', 'created_at',
            ]);

        return response()->json([
            'code' => 0,
            'msg' => '',
            'count' => $total,
            'data' => $rows->map(static fn (PageVisit $v) => [
                'id' => $v->id,
                'channel_id' => $v->channel_id,
                'client_uid' => $v->client_uid,
                'os' => $v->os ?: '',
                'os_version' => $v->os_version ?: '',
                'browser' => $v->browser ?: '',
                'browser_version' => $v->browser_version ?: '',
                'user_agent' => $v->user_agent ?: '',
                'ip' => $v->ip ?: '',
                'path' => $v->path ?: '',
                'created_at' => optional($v->created_at)?->toDateTimeString(),
            ])->values(),
        ]);
    }

    public function groups(Request $request)
    {
        $group = (string) $request->query('group', 'os');
        $base = $this->scopedQuery($request);
        $builder = match ($group) {
            'os_version' => $base
                ->select('os', 'os_version')
                ->selectRaw('COUNT(*) as pv')
                ->selectRaw('COUNT(DISTINCT client_uid) as uv')
                ->groupBy('os', 'os_version'),
            'browser' => $base
                ->select('browser')
                ->selectRaw('COUNT(*) as pv')
                ->selectRaw('COUNT(DISTINCT client_uid) as uv')
                ->groupBy('browser'),
            'browser_version' => $base
                ->select('browser', 'browser_version')
                ->selectRaw('COUNT(*) as pv')
                ->selectRaw('COUNT(DISTINCT client_uid) as uv')
                ->groupBy('browser', 'browser_version'),
            default => $base
                ->select('os')
                ->selectRaw('COUNT(*) as pv')
                ->selectRaw('COUNT(DISTINCT client_uid) as uv')
                ->groupBy('os'),
        };

        $rows = $builder
            ->orderByDesc('pv')
            ->limit(50)
            ->get()
            ->map(static function ($row) use ($group) {
                $label = match ($group) {
                    'os_version' => trim(((string) ($row->os ?? '')).' '.((string) ($row->os_version ?? ''))),
                    'browser' => (string) ($row->browser ?? ''),
                    'browser_version' => trim(((string) ($row->browser ?? '')).' '.((string) ($row->browser_version ?? ''))),
                    default => (string) ($row->os ?? ''),
                };

                return [
                    'label' => $label !== '' ? $label : 'Unknown',
                    'pv' => (int) $row->pv,
                    'uv' => (int) $row->uv,
                ];
            })
            ->values();

        return response()->json([
            'code' => 0,
            'msg' => '',
            'data' => [
                'group' => $group,
                'rows' => $rows,
            ],
        ]);
    }

    private function scopedQuery(Request $request)
    {
        $q = PageVisit::query();
        AgentScope::applyChannelIdScope($q, $this->agent());

        $agentUserId = $this->isAgentPortal()
            ? (int) ($this->agent()?->id ?? 0)
            : (int) $request->query('agent_user_id', 0);
        if (! $this->isAgentPortal() && $agentUserId > 0) {
            AgentScope::applyChannelIdAgentUserFilter($q, $agentUserId);
        }

        $channelId = trim((string) $request->query('channel_id', ''));
        if ($channelId !== '') {
            $q->where('channel_id', 'like', '%'.$channelId.'%');
        }

        $os = trim((string) $request->query('os', ''));
        if ($os !== '') {
            $q->where('os', $os);
        }
        $osVersion = trim((string) $request->query('os_version', ''));
        if ($osVersion !== '') {
            $q->where('os_version', $osVersion);
        }
        $browser = trim((string) $request->query('browser', ''));
        if ($browser !== '') {
            $q->where('browser', $browser);
        }
        $browserVersion = trim((string) $request->query('browser_version', ''));
        if ($browserVersion !== '') {
            $q->where('browser_version', $browserVersion);
        }

        [$from, $to] = $this->rangeBounds((string) $request->query('range', '30d'));
        $q->whereBetween('created_at', [$from, $to]);

        return $q;
    }

    /**
     * @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()],
        };
    }
}