<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;
use Illuminate\Support\Str;

class Project extends Model
{
    use HasFactory, SoftDeletes;

    protected $fillable = [
        'proposal_id',
        'title',
        'slug',
        'client_name',
        'client_email',
        'client_access_code',
        'status',
        'progress_percent',
        'start_date',
        'target_date',
        'completed_at',
        'notes',
    ];

    protected $casts = [
        'start_date' => 'date',
        'target_date' => 'date',
        'completed_at' => 'datetime',
        'progress_percent' => 'integer',
    ];

    protected static function boot()
    {
        parent::boot();

        static::creating(function ($project) {
            if (empty($project->slug)) {
                $project->slug = Str::slug($project->title) . '-' . Str::random(5);
            }
            if (empty($project->client_access_code)) {
                $project->client_access_code = strtoupper(Str::random(6));
            }
        });
    }

    public function proposal()
    {
        return $this->belongsTo(Proposal::class);
    }

    public function modules()
    {
        return $this->hasMany(ProjectModule::class)->orderBy('order', 'asc');
    }

    public function tasks()
    {
        return $this->hasMany(ProjectTask::class)->orderBy('order_index', 'asc');
    }

    public function updates()
    {
        return $this->hasMany(ProjectUpdate::class)->latest();
    }

    /**
     * Recalculate progress percentage based on completed modules weight
     */
    public function recalculateProgress()
    {
        $totalWeight = $this->modules()->sum('weight_percent');
        if ($totalWeight > 0) {
            $completedWeight = $this->modules()->where('status', 'completed')->sum('weight_percent');
            $progress = (int) round(($completedWeight / $totalWeight) * 100);
        } else {
            $totalTasks = $this->tasks()->count();
            if ($totalTasks > 0) {
                $completedTasks = $this->tasks()->where('status', 'done')->count();
                $progress = (int) round(($completedTasks / $totalTasks) * 100);
            } else {
                $progress = $this->progress_percent;
            }
        }

        $this->update(['progress_percent' => min(100, max(0, $progress))]);
        return $this->progress_percent;
    }
}