<?php

namespace App\Models\Admin;

use App\Models\User;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\SoftDeletes;

class AdminRoadmapPlan extends Model
{
    use SoftDeletes;

    protected $table = 'admin_roadmap_plans';

    protected $fillable = [
        'title',
        'description',
        'content',
        'category',
        'status',
        'priority',
        'phase',
        'start_date',
        'end_date',
        'progress',
        'color',
        'sort_order',
        'created_by',
        'updated_by',
        'deleted_by',
    ];

    protected $casts = [
        'start_date' => 'date',
        'end_date' => 'date',
        'progress' => 'integer',
        'sort_order' => 'integer',
        'created_by' => 'integer',
        'updated_by' => 'integer',
        'deleted_by' => 'integer',
    ];

    // 상태
    public const STATUS_PLANNED = 'planned';

    public const STATUS_IN_PROGRESS = 'in_progress';

    public const STATUS_COMPLETED = 'completed';

    public const STATUS_DELAYED = 'delayed';

    public const STATUS_CANCELLED = 'cancelled';

    // 카테고리
    public const CATEGORY_GENERAL = 'general';

    public const CATEGORY_PRODUCT = 'product';

    public const CATEGORY_INFRASTRUCTURE = 'infrastructure';

    public const CATEGORY_BUSINESS = 'business';

    public const CATEGORY_HR = 'hr';

    // 우선순위
    public const PRIORITY_LOW = 'low';

    public const PRIORITY_MEDIUM = 'medium';

    public const PRIORITY_HIGH = 'high';

    public const PRIORITY_CRITICAL = 'critical';

    // Phase
    public const PHASE_1 = 'phase_1';

    public const PHASE_2 = 'phase_2';

    public const PHASE_3 = 'phase_3';

    public const PHASE_4 = 'phase_4';

    public static function getStatuses(): array
    {
        return [
            self::STATUS_PLANNED => '계획',
            self::STATUS_IN_PROGRESS => '진행중',
            self::STATUS_COMPLETED => '완료',
            self::STATUS_DELAYED => '지연',
            self::STATUS_CANCELLED => '취소',
        ];
    }

    public static function getCategories(): array
    {
        return [
            self::CATEGORY_GENERAL => '일반',
            self::CATEGORY_PRODUCT => '제품',
            self::CATEGORY_INFRASTRUCTURE => '인프라',
            self::CATEGORY_BUSINESS => '사업',
            self::CATEGORY_HR => '인사',
        ];
    }

    public static function getPriorities(): array
    {
        return [
            self::PRIORITY_LOW => '낮음',
            self::PRIORITY_MEDIUM => '보통',
            self::PRIORITY_HIGH => '높음',
            self::PRIORITY_CRITICAL => '긴급',
        ];
    }

    public static function getPhases(): array
    {
        return [
            self::PHASE_1 => 'Phase 1 — 코어 실증',
            self::PHASE_2 => 'Phase 2 — 3~5사 확장',
            self::PHASE_3 => 'Phase 3 — SaaS 전환',
            self::PHASE_4 => 'Phase 4 — 스케일업',
        ];
    }

    public function scopeStatus($query, string $status)
    {
        return $query->where('status', $status);
    }

    public function scopeCategory($query, string $category)
    {
        return $query->where('category', $category);
    }

    public function scopePhase($query, string $phase)
    {
        return $query->where('phase', $phase);
    }

    public function milestones(): HasMany
    {
        return $this->hasMany(AdminRoadmapMilestone::class, 'plan_id');
    }

    public function creator(): BelongsTo
    {
        return $this->belongsTo(User::class, 'created_by');
    }

    public function updater(): BelongsTo
    {
        return $this->belongsTo(User::class, 'updated_by');
    }

    public function getStatusLabelAttribute(): string
    {
        return self::getStatuses()[$this->status] ?? $this->status;
    }

    public function getStatusColorAttribute(): string
    {
        return match ($this->status) {
            self::STATUS_PLANNED => 'bg-gray-100 text-gray-800',
            self::STATUS_IN_PROGRESS => 'bg-blue-100 text-blue-800',
            self::STATUS_COMPLETED => 'bg-green-100 text-green-800',
            self::STATUS_DELAYED => 'bg-red-100 text-red-800',
            self::STATUS_CANCELLED => 'bg-yellow-100 text-yellow-800',
            default => 'bg-gray-100 text-gray-800',
        };
    }

    public function getCategoryLabelAttribute(): string
    {
        return self::getCategories()[$this->category] ?? $this->category;
    }

    public function getPriorityLabelAttribute(): string
    {
        return self::getPriorities()[$this->priority] ?? $this->priority;
    }

    public function getPriorityColorAttribute(): string
    {
        return match ($this->priority) {
            self::PRIORITY_LOW => 'bg-gray-100 text-gray-600',
            self::PRIORITY_MEDIUM => 'bg-blue-100 text-blue-700',
            self::PRIORITY_HIGH => 'bg-orange-100 text-orange-700',
            self::PRIORITY_CRITICAL => 'bg-red-100 text-red-700',
            default => 'bg-gray-100 text-gray-600',
        };
    }

    public function getPhaseLabelAttribute(): string
    {
        return self::getPhases()[$this->phase] ?? $this->phase;
    }

    public function getCalculatedProgressAttribute(): int
    {
        $total = $this->milestones()->count();
        if ($total === 0) {
            return $this->progress;
        }
        $completed = $this->milestones()->where('status', AdminRoadmapMilestone::STATUS_COMPLETED)->count();

        return (int) round(($completed / $total) * 100);
    }

    public function getMilestoneStatsAttribute(): array
    {
        return [
            'total' => $this->milestones()->count(),
            'pending' => $this->milestones()->where('status', AdminRoadmapMilestone::STATUS_PENDING)->count(),
            'completed' => $this->milestones()->where('status', AdminRoadmapMilestone::STATUS_COMPLETED)->count(),
        ];
    }

    public function getPeriodAttribute(): string
    {
        if ($this->start_date && $this->end_date) {
            return $this->start_date->format('Y.m').' ~ '.$this->end_date->format('Y.m');
        }
        if ($this->start_date) {
            return $this->start_date->format('Y.m').' ~';
        }

        return '-';
    }
}