<?php

namespace App\Services\AuditTrail;

use App\Models\Study;
use App\Services\BrowserService;
use Illuminate\Contracts\Auth\Authenticatable;
use Illuminate\Support\Facades\DB;

class ActivityLogger
{
    private ?int $studyId = null;

    private ?int $userId = null;

    private Activity $activity;

    private Category $category;

    private ?string $url = null;

    private ?string $notes = null;

    private ?int $userAgentId = null;

    private ?string $ipAddr = null;

    private bool $anonymous = false;

    private ?string $orthancId = null;

    public function __construct()
    {
        $this->category = Category::GENERAL;
    }

    public function on(Study|int $study): static
    {
        if ($study instanceof Study) {
            $this->studyId = $study->id;
        } else {
            $this->studyId = (int) $study;
        }

        return $this;
    }

    public function by(Authenticatable|int|null $user = null): static
    {
        if ($user === null) {
            $user = auth()->user();
        }

        if ($user instanceof Authenticatable) {
            $this->userId = (int) $user->getAuthIdentifier();
        } else {
            $this->userId = $user;
        }

        return $this;
    }

    public function did(Activity $activity): static
    {
        $this->activity = $activity;

        return $this;
    }

    public function category(Category $category): static
    {
        $this->category = $category;

        return $this;
    }

    public function url(?string $url = null): static
    {
        $this->url = $url ?? request()->path();

        return $this;
    }

    public function orthanc(string $uuid): static
    {
        $this->orthancId = $uuid;

        return $this;
    }

    public function notes(string $notes): static
    {
        $this->notes = $notes;

        return $this;
    }

    public function ua(?string $agent = null): static
    {
        $this->userAgentId = BrowserService::upsertBrowser($agent);

        return $this;
    }

    public function ip(?string $addr = null): static
    {
        $this->ipAddr = $addr ?? request()->ip();

        return $this;
    }

    public function anon()
    {
        $this->anonymous = true;
        $this->userId = null;

        return $this;
    }

    public function log(bool $initDefaults = true): bool
    {
        if ($initDefaults) {
            $this->ip();
            $this->url();
            $this->ua();
            if ($this->userId === null && ! $this->anonymous) {
                $this->by();
            }
        }

        return DB::table('audit_logs')
            ->insert([
                'study_id' => $this->studyId,
                'user_id' => $this->userId,
                'category' => $this->category->value,
                'activity' => $this->activity->value,
                'orthanc_uuid' => $this->orthancId,
                'ip_addr' => $this->ipAddr,
                'user_agent_id' => $this->userAgentId,
                'url' => $this->url,
                'notes' => $this->notes,
                'created_at' => now(),
            ]);
    }
}