<?php

namespace Modules\ProjectManagement\Models;

use App\Traits\HasPublicIdentifier;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Modules\ProjectManagement\Enums\WeatherCondition;

class ProjectMilestone extends Model
{
    use HasPublicIdentifier;

    protected $fillable = [
        'project_id',
        'name',
        'description',
        'planned_date',
        'actual_date',
        'sort_order',
        'weight_percentage',
        'is_default',
        'weather_impacted',
        'weather_condition',
        'weather_delay_days',
        'weather_notes',
    ];

    protected function casts(): array
    {
        return [
            'planned_date' => 'date',
            'actual_date' => 'date',
            'weight_percentage' => 'decimal:2',
            'is_default' => 'boolean',
            'weather_impacted' => 'boolean',
            'weather_condition' => WeatherCondition::class,
        ];
    }

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

    public function tasks(): \Illuminate\Database\Eloquent\Relations\HasMany
    {
        return $this->hasMany(Task::class, 'milestone_id');
    }

    // --- Accessors ---

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

    public function getIsOverdueAttribute(): bool
    {
        return !$this->is_completed
            && $this->planned_date
            && $this->planned_date->isPast();
    }

    public function getStatusAttribute(): string
    {
        if ($this->is_completed) return 'completed';
        if ($this->is_overdue) return 'overdue';
        return 'upcoming';
    }

    public function getStatusColorAttribute(): string
    {
        return match ($this->status) {
            'completed' => 'emerald',
            'overdue' => 'amber',
            default => 'gray',
        };
    }

    public function getDaysDelayedAttribute(): int
    {
        if (!$this->is_completed || !$this->planned_date) return 0;

        $diff = $this->planned_date->diffInDays($this->actual_date, false);
        return max(0, $diff);
    }
}