<?php

namespace App\Models;

use Illuminate\Contracts\Auth\MustVerifyEmail;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\SoftDeletes;
use Illuminate\Foundation\Auth\User as Authenticatable;
use Illuminate\Notifications\Notifiable;
use Laravel\Sanctum\HasApiTokens;

class User extends Authenticatable
{
    use HasApiTokens, HasFactory, Notifiable, SoftDeletes;

    /**
     * The attributes that are mass assignable.
     *
     * @var array<int, string>
     */
    protected $fillable = [
        'name',
        'email',
        'role',
        'dealer_id',
        'password',
        'role_id'
    ];

    /**
     * The attributes that should be hidden for serialization.
     *
     * @var array<int, string>
     */
    protected $hidden = [
        'password',
        'remember_token',
    ];

    /**
     * The attributes that should be cast.
     *
     * @var array<string, string>
     */
    protected $casts = [
        'email_verified_at' => 'datetime',
    ];

    /**
     * Get all of the transactions for the User
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasMany
     */
    public function transactions()
    {
        return $this->hasMany(Transaction::class, 'user_id', 'id');
    }

    /**
     * Get all of the sa_transactions for the User
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasMany
     */
    public function sa_transactions()
    {
        return $this->hasMany(Transaction::class, 'user_sa_id', 'id');
    }

    /**
     * Get the dealer associated with the User
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasOne
     */
    public function dealer()
    {
        return $this->hasOne(Dealer::class, 'id', 'dealer_id');
    }

    /**
     * Get the role associated with the User
     *
     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
     */
    public function role()
    {
        return $this->belongsTo(Role::class, 'role_id');
    }

    /**
     * Check if user has a specific role
     *
     * @param string $roleName
     * @return bool
     */
    public function hasRole($roleName)
    {
        // If role_id is 0 or null, user has no role
        if (!$this->role_id) {
            return false;
        }

        // For admin role, we can check if user has admin privileges
        if (strtolower($roleName) === 'admin') {
            return $this->isAdmin();
        }

        // Load role if not already loaded
        if (!$this->relationLoaded('role')) {
            $this->load('role');
        }

        return $this->role && strtolower($this->role->name) === strtolower($roleName);
    }

    /**
     * Check if user is admin by checking admin privileges
     *
     * @return bool
     */
    public function isAdmin()
    {
        // Check if user has admin privileges by checking if they can access admin area
        try {
            $adminPrivilege = \App\Models\Privilege::join('menus', 'menus.id', '=', 'privileges.menu_id')
                ->where('menus.link', 'adminarea')
                ->where('privileges.role_id', $this->role_id)
                ->where('privileges.view', 1)
                ->first();
            
            return $adminPrivilege !== null;
        } catch (\Exception $e) {
            return false;
        }
    }

    /**
     * Get all KPI targets for the User
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasMany
     */
    public function kpiTargets()
    {
        return $this->hasMany(KpiTarget::class);
    }

    /**
     * Get all KPI achievements for the User
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasMany
     */
    public function kpiAchievements()
    {
        return $this->hasMany(KpiAchievement::class);
    }

    /**
     * Check if user is mechanic
     *
     * @return bool
     */
    public function isMechanic()
    {
        return $this->hasRole('mechanic');
    }

    /**
     * Get current KPI target (no longer filtered by year/month)
     *
     * @return KpiTarget|null
     */
    public function getCurrentKpiTarget()
    {
        return $this->kpiTargets()
            ->where('is_active', true)
            ->first();
    }

    /**
     * Get KPI achievement for specific year and month
     *
     * @param int $year
     * @param int $month
     * @return KpiAchievement|null
     */
    public function getKpiAchievement($year = null, $month = null)
    {
        $year = $year ?? now()->year;
        $month = $month ?? now()->month;
        
        return $this->kpiAchievements()
            ->where('year', $year)
            ->where('month', $month)
            ->first();
    }

    public function accessibleDealers()
    {
        if (!$this->role_id) {
            return collect();
        }

        // Load role with dealers
        if (!$this->relationLoaded('role')) {
            $this->load('role.dealers');
        }

        // If user has specific dealer_id, check if role allows access
        if ($this->dealer_id) {
            if ($this->role && $this->role->hasDealer($this->dealer_id)) {
                return Dealer::where('id', $this->dealer_id)->get();
            }
            return collect();
        }

        // If no specific dealer_id, return all dealers accessible by role
        return $this->role ? $this->role->dealers : collect();
    }

    public function canAccessDealer($dealerId)
    {
        if (!$this->role_id) {
            return false;
        }

        // Load role with dealers
        if (!$this->relationLoaded('role')) {
            $this->load('role.dealers');
        }

        return $this->role && $this->role->hasDealer($dealerId);
    }

    public function getPrimaryDealer()
    {
        if ($this->dealer_id && $this->canAccessDealer($this->dealer_id)) {
            return $this->dealer;
        }
        return null;
    }

    /**
     * Get all accessible menus for a specific role
     *
     * @param int $roleId
     * @return \Illuminate\Database\Eloquent\Collection
     */
    public static function getAccessibleMenus($roleId)
    {
        return \App\Models\Privilege::join('menus', 'privileges.menu_id', '=', 'menus.id')
            ->where('privileges.role_id', $roleId)
            ->where('privileges.view', 1)
            ->select('menus.*', 'privileges.view', 'privileges.create', 'privileges.update', 'privileges.delete')
            ->orderBy('menus.id')
            ->get();
    }

    /**
     * Get accessible menus for current user
     *
     * @return \Illuminate\Database\Eloquent\Collection
     */
    public function getMyAccessibleMenus()
    {
        if (!$this->role_id) {
            return collect();
        }
        return self::getAccessibleMenus($this->role_id);
    }

    /**
     * Check if user can access specific menu
     *
     * @param string $menuLink
     * @return bool
     */
    public function canAccessMenu($menuLink)
    {
        if (!$this->role_id) {
            return false;
        }

        return \App\Models\Privilege::join('menus', 'privileges.menu_id', '=', 'menus.id')
            ->where('privileges.role_id', $this->role_id)
            ->where('menus.link', $menuLink)
            ->where('privileges.view', 1)
            ->exists();
    }

    /**
     * Check if role can access specific menu (static method)
     *
     * @param int $roleId
     * @param string $menuLink
     * @return bool
     */
    public static function roleCanAccessMenu($roleId, $menuLink)
    {
        return \App\Models\Privilege::join('menus', 'privileges.menu_id', '=', 'menus.id')
            ->where('privileges.role_id', $roleId)
            ->where('menus.link', $menuLink)
            ->where('privileges.view', 1)
            ->exists();
    }
}