<?php

declare(strict_types=1);

namespace App\Policies;

use App\Models\Event;
use App\Models\ShiftAssignment;
use App\Models\User;

final class ShiftAssignmentPolicy
{
    public function viewAny(User $user, Event $event): bool
    {
        return $user->hasRole('super_admin')
            || $event->organisation->users()->where('user_id', $user->id)->exists();
    }

    public function approve(User $user, ShiftAssignment $assignment, Event $event): bool
    {
        if ($assignment->shift->festivalSection->event_id !== $event->id) {
            return false;
        }

        return $this->canManageEvent($user, $event);
    }

    public function reject(User $user, ShiftAssignment $assignment, Event $event): bool
    {
        if ($assignment->shift->festivalSection->event_id !== $event->id) {
            return false;
        }

        return $this->canManageEvent($user, $event);
    }

    public function cancel(User $user, ShiftAssignment $assignment, Event $event): bool
    {
        if ($assignment->shift->festivalSection->event_id !== $event->id) {
            return false;
        }

        if ($this->canManageEvent($user, $event)) {
            return true;
        }

        // Volunteers can cancel their own assignments
        $person = $assignment->person;

        return $person->user_id !== null && $person->user_id === $user->id;
    }

    public function bulkApprove(User $user, Event $event): bool
    {
        return $this->canManageEvent($user, $event);
    }

    private function canManageEvent(User $user, Event $event): bool
    {
        if ($user->hasRole('super_admin')) {
            return true;
        }

        $isOrgAdmin = $event->organisation->users()
            ->where('user_id', $user->id)
            ->wherePivot('role', 'org_admin')
            ->exists();

        if ($isOrgAdmin) {
            return true;
        }

        return $event->users()
            ->where('user_id', $user->id)
            ->wherePivot('role', 'event_manager')
            ->exists();
    }
}