<?php

namespace App\Http\Controllers;

use App\Models\AnalyticsSession;
use App\Models\Event;
use App\Models\PageView;
use App\Models\Visitor;
use App\Models\Website;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Carbon;

class CollectController extends Controller
{
    public function store(Request $request): JsonResponse
    {
        $payload = $request->validate([
            'tid' => 'required|string',
            'vid' => 'required|string|max:64',
            'sid' => 'required|string|max:64',
            'type' => 'required|in:pageview,event',

            'url' => 'nullable|string|max:2048',
            'path' => 'nullable|string|max:2048',
            'title' => 'nullable|string|max:512',
            'referrer' => 'nullable|string|max:2048',

            'event_name' => 'nullable|string|max:255',
            'event_category' => 'nullable|string|max:255',
            'event_action' => 'nullable|string|max:255',
            'event_label' => 'nullable|string|max:255',
            'event_value' => 'nullable|numeric',
            'event_properties' => 'nullable|array',

            'sr' => 'nullable|string|max:20',
            'lang' => 'nullable|string|max:10',
            'ua' => 'nullable|string|max:512',

            'utm_source' => 'nullable|string|max:255',
            'utm_medium' => 'nullable|string|max:255',
            'utm_campaign' => 'nullable|string|max:255',
            'utm_term' => 'nullable|string|max:255',
            'utm_content' => 'nullable|string|max:255',

            'ref_domain' => 'nullable|string|max:255',
            'device' => 'nullable|string|max:20',
            'browser' => 'nullable|string|max:50',
            'browser_version' => 'nullable|string|max:20',
            'os' => 'nullable|string|max:50',
            'os_version' => 'nullable|string|max:20',

            'time_on_page' => 'nullable|integer|min:0',
            'is_new_session' => 'nullable|boolean',
        ]);

        $website = Website::where('tracking_id', $payload['tid'])
            ->where('is_active', true)
            ->first();

        if (! $website) {
            return response()->json(['ok' => false], 404);
        }

        $now = Carbon::now();

        $visitor = Visitor::updateOrCreate(
            [
                'website_id' => $website->id,
                'uid' => $payload['vid'],
            ],
            [
                'last_seen_at' => $now,
                'first_seen_at' => $now,
                'device_type' => $payload['device'] ?? null,
                'browser' => $payload['browser'] ?? null,
                'browser_version' => $payload['browser_version'] ?? null,
                'os' => $payload['os'] ?? null,
                'os_version' => $payload['os_version'] ?? null,
                'screen_resolution' => $payload['sr'] ?? null,
                'language' => $payload['lang'] ?? null,
            ],
        );

        if ($visitor->wasRecentlyCreated) {
            $visitor->update(['first_seen_at' => $now]);
        }

        $session = AnalyticsSession::firstOrCreate(
            ['uid' => $payload['sid']],
            [
                'website_id' => $website->id,
                'visitor_id' => $visitor->id,
                'started_at' => $now,
                'entry_page' => $payload['path'] ?? $payload['url'] ?? null,
                'ip_address' => $request->ip(),
                'referrer_url' => $payload['referrer'] ?? null,
                'referrer_domain' => $payload['ref_domain'] ?? null,
                'utm_source' => $payload['utm_source'] ?? null,
                'utm_medium' => $payload['utm_medium'] ?? null,
                'utm_campaign' => $payload['utm_campaign'] ?? null,
                'utm_term' => $payload['utm_term'] ?? null,
                'utm_content' => $payload['utm_content'] ?? null,
            ],
        );

        if ($payload['type'] === 'pageview') {
            $this->recordPageView($website, $visitor, $session, $payload, $now);
        }

        if ($payload['type'] === 'event') {
            $this->recordEvent($website, $visitor, $session, $payload, $now);
        }

        $session->update([
            'ended_at' => $now,
            'duration' => $now->diffInSeconds($session->started_at),
            'exit_page' => $payload['path'] ?? $payload['url'] ?? $session->exit_page,
            'pages_count' => $session->pageViews()->count(),
            'is_bounce' => $session->pageViews()->count() <= 1,
        ]);

        return response()->json(['ok' => true]);
    }

    private function recordPageView(
        Website $website,
        Visitor $visitor,
        AnalyticsSession $session,
        array $payload,
        Carbon $now,
    ): void {
        PageView::create([
            'website_id' => $website->id,
            'visitor_id' => $visitor->id,
            'analytics_session_id' => $session->id,
            'url' => $payload['url'] ?? '',
            'path' => $payload['path'] ?? '/',
            'title' => $payload['title'] ?? null,
            'referrer' => $payload['referrer'] ?? null,
            'time_on_page' => $payload['time_on_page'] ?? null,
            'viewed_at' => $now,
        ]);
    }

    private function recordEvent(
        Website $website,
        Visitor $visitor,
        AnalyticsSession $session,
        array $payload,
        Carbon $now,
    ): void {
        Event::create([
            'website_id' => $website->id,
            'visitor_id' => $visitor->id,
            'analytics_session_id' => $session->id,
            'name' => $payload['event_name'] ?? 'unknown',
            'category' => $payload['event_category'] ?? null,
            'action' => $payload['event_action'] ?? null,
            'label' => $payload['event_label'] ?? null,
            'value' => $payload['event_value'] ?? null,
            'properties' => $payload['event_properties'] ?? null,
            'occurred_at' => $now,
        ]);
    }
}