<?php

declare(strict_types=1);

namespace App\Services;

use App\Mail\InvitationMail;
use App\Models\Organisation;
use App\Models\User;
use App\Models\UserInvitation;
use Illuminate\Support\Facades\Mail;
use Illuminate\Support\Str;
use Illuminate\Validation\ValidationException;
use Spatie\Activitylog\Facades\LogActivity;

final class InvitationService
{
    public function invite(Organisation $org, string $email, string $role, User $invitedBy): UserInvitation
    {
        $existingInvitation = UserInvitation::where('email', $email)
            ->where('organisation_id', $org->id)
            ->pending()
            ->where('expires_at', '>', now())
            ->first();

        if ($existingInvitation) {
            throw ValidationException::withMessages([
                'email' => ['Er is al een openstaande uitnodiging voor dit e-mailadres.'],
            ]);
        }

        $existingMember = $org->users()->where('email', $email)->first();

        if ($existingMember) {
            throw ValidationException::withMessages([
                'email' => ['Gebruiker is al lid van deze organisatie.'],
            ]);
        }

        $invitation = UserInvitation::create([
            'email' => $email,
            'invited_by_user_id' => $invitedBy->id,
            'organisation_id' => $org->id,
            'role' => $role,
            'token' => strtolower((string) Str::ulid()),
            'status' => 'pending',
            'expires_at' => now()->addDays(7),
        ]);

        Mail::to($email)->queue(new InvitationMail($invitation));

        activity('invitation')
            ->performedOn($invitation)
            ->causedBy($invitedBy)
            ->withProperties(['email' => $email, 'role' => $role])
            ->log("Invited {$email} as {$role}");

        return $invitation;
    }

    public function accept(UserInvitation $invitation, ?string $password = null): User
    {
        if (! $invitation->isPending() || $invitation->isExpired()) {
            throw ValidationException::withMessages([
                'token' => ['Deze uitnodiging is niet meer geldig.'],
            ]);
        }

        $user = User::where('email', $invitation->email)->first();

        if (! $user) {
            if (! $password) {
                throw ValidationException::withMessages([
                    'password' => ['Een wachtwoord is vereist om een nieuw account aan te maken.'],
                ]);
            }

            $user = User::create([
                'name' => Str::before($invitation->email, '@'),
                'email' => $invitation->email,
                'password' => $password,
                'email_verified_at' => now(),
            ]);
        }

        $organisation = $invitation->organisation;

        if (! $organisation->users()->where('user_id', $user->id)->exists()) {
            $organisation->users()->attach($user, ['role' => $invitation->role]);
        }

        $invitation->markAsAccepted();

        activity('invitation')
            ->performedOn($invitation)
            ->causedBy($user)
            ->withProperties(['email' => $invitation->email])
            ->log("Accepted invitation for {$organisation->name}");

        return $user;
    }

    public function expireOldInvitations(): int
    {
        return UserInvitation::where('status', 'pending')
            ->where('expires_at', '<', now())
            ->update(['status' => 'expired']);
    }
}