<?php

declare(strict_types=1);

namespace App\Models;

use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Concerns\HasUlids;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\SoftDeletes;

final class Event extends Model
{
    use HasFactory;
    use HasUlids;
    use SoftDeletes;

    protected $fillable = [
        'organisation_id',
        'parent_event_id',
        'name',
        'slug',
        'start_date',
        'end_date',
        'timezone',
        'status',
        'event_type',
        'event_type_label',
        'sub_event_label',
        'is_recurring',
        'recurrence_rule',
        'recurrence_exceptions',
    ];

    protected function casts(): array
    {
        return [
            'start_date' => 'date',
            'end_date' => 'date',
            'is_recurring' => 'boolean',
            'recurrence_exceptions' => 'array',
            'event_type' => 'string',
        ];
    }

    public function organisation(): BelongsTo
    {
        return $this->belongsTo(Organisation::class);
    }

    public function users(): BelongsToMany
    {
        return $this->belongsToMany(User::class, 'event_user_roles')
            ->withPivot('role')
            ->withTimestamps();
    }

    public function invitations(): HasMany
    {
        return $this->hasMany(UserInvitation::class);
    }

    public function locations(): HasMany
    {
        return $this->hasMany(Location::class);
    }

    public function festivalSections(): HasMany
    {
        return $this->hasMany(FestivalSection::class);
    }

    public function timeSlots(): HasMany
    {
        return $this->hasMany(TimeSlot::class);
    }

    public function persons(): HasMany
    {
        return $this->hasMany(Person::class);
    }

    public function crowdLists(): HasMany
    {
        return $this->hasMany(CrowdList::class);
    }

    public function parent(): BelongsTo
    {
        return $this->belongsTo(Event::class, 'parent_event_id');
    }

    public function children(): HasMany
    {
        return $this->hasMany(Event::class, 'parent_event_id')
            ->orderBy('start_date')
            ->orderBy('name');
    }

    // ----- Scopes -----

    public function scopeTopLevel(Builder $query): Builder
    {
        return $query->whereNull('parent_event_id');
    }

    public function scopeChildren(Builder $query): Builder
    {
        return $query->whereNotNull('parent_event_id');
    }

    public function scopeFestivals(Builder $query): Builder
    {
        return $query->whereIn('event_type', ['festival', 'series']);
    }

    public function scopeWithChildren(Builder $query): Builder
    {
        return $query->where(function (Builder $q) {
            $q->whereIn('id', function ($sub) {
                $sub->select('id')->from('events')->whereNull('parent_event_id');
            })->orWhereIn('parent_event_id', function ($sub) {
                $sub->select('id')->from('events')->whereNull('parent_event_id');
            });
        });
    }

    // ----- Helpers -----

    public function isFestival(): bool
    {
        return $this->event_type !== 'event' && $this->parent_event_id === null;
    }

    public function isSubEvent(): bool
    {
        return $this->parent_event_id !== null;
    }

    public function isFlatEvent(): bool
    {
        return $this->parent_event_id === null && $this->children()->count() === 0;
    }

    public function hasChildren(): bool
    {
        return $this->children()->exists();
    }

    public function scopeDraft(Builder $query): Builder
    {
        return $query->where('status', 'draft');
    }

    public function scopePublished(Builder $query): Builder
    {
        return $query->where('status', 'published');
    }

    public function scopeActive(Builder $query): Builder
    {
        return $query->whereIn('status', ['showday', 'buildup', 'teardown']);
    }
}