<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;

class VisitArea extends SoftDeletesModel
{
    use HasFactory;

    protected $table = 'visit_areas';

    protected $casts = [
        'audit_admin' => 'array',
        'audit_type' => 'integer',
    ];

    // 审核类型常量
    const AUDIT_TYPE_SINGLE = 1;    // 单人审核
    const AUDIT_TYPE_MULTIPLE = 2;  // 多人审核
    const AUDIT_TYPE_LEVEL = 3;     // 分级审核

    /**
     * 关联访问申请
     */
    public function visits()
    {
        return $this->hasMany(Visit::class, 'visit_area_id');
    }

    /**
     * 获取审核类型文本
     */
    public function getAuditTypeTextAttribute()
    {
        $types = [
            self::AUDIT_TYPE_SINGLE => '单人审核',
            self::AUDIT_TYPE_MULTIPLE => '多人审核',
            self::AUDIT_TYPE_LEVEL => '分级审核',
        ];
        return $types[$this->audit_type] ?? '未知';
    }

    /**
     * 获取审核人员列表
     */
    public function getAuditAdmins()
    {
        if (!$this->audit_admin) {
            return collect();
        }

        $adminIds = array_column($this->audit_admin, 'admin_id');
        return Admin::whereIn('id', $adminIds)->get();
    }

    /**
     * 检查管理员是否有审核权限
     */
    public function canAudit($adminId)
    {
        if (!$this->audit_admin) {
            return false;
        }

        foreach ($this->audit_admin as $auditAdmin) {
            if (isset($auditAdmin['admin_id']) && $auditAdmin['admin_id'] == $adminId) {
                return true;
            }
        }

        return false;
    }

    /**
     * 获取审核流程
     */
    public function getAuditFlow()
    {
        if (!$this->audit_admin) {
            return [];
        }

        $flow = [];
        foreach ($this->audit_admin as $index => $auditAdmin) {
            $flow[] = [
                'level' => $index + 1,
                'admin_id' => $auditAdmin['admin_id'] ?? 0,
                'admin_name' => $auditAdmin['admin_name'] ?? '上级审核',
                'is_superior' => ($auditAdmin['admin_id'] ?? 0) == 0,
            ];
        }

        return $flow;
    }

    /**
     * 添加审核人员
     */
    public function addAuditAdmin($adminId, $adminName = null)
    {
        $auditAdmins = $this->audit_admin ?? [];

        // 检查是否已存在
        foreach ($auditAdmins as $auditAdmin) {
            if (isset($auditAdmin['admin_id']) && $auditAdmin['admin_id'] == $adminId) {
                return false;
            }
        }

        $auditAdmins[] = [
            'admin_id' => $adminId,
            'admin_name' => $adminName,
        ];

        $this->audit_admin = $auditAdmins;
        $this->save();

        return true;
    }

    /**
     * 移除审核人员
     */
    public function removeAuditAdmin($adminId)
    {
        if (!$this->audit_admin) {
            return false;
        }

        $auditAdmins = array_filter($this->audit_admin, function ($auditAdmin) use ($adminId) {
            return !isset($auditAdmin['admin_id']) || $auditAdmin['admin_id'] != $adminId;
        });

        $this->audit_admin = array_values($auditAdmins);
        $this->save();

        return true;
    }

    /**
     * 获取区域统计信息
     */
    public function getStatistics()
    {
        $visits = $this->visits();

        return [
            'total_visits' => $visits->count(),
            'pending_visits' => $visits->where('audit_status', Visit::AUDIT_STATUS_PENDING)->count(),
            'approved_visits' => $visits->where('audit_status', Visit::AUDIT_STATUS_APPROVED)->count(),
            'rejected_visits' => $visits->where('audit_status', Visit::AUDIT_STATUS_REJECTED)->count(),
            'entered_visits' => $visits->where('audit_status', Visit::AUDIT_STATUS_ENTERED)->count(),
            'left_visits' => $visits->where('audit_status', Visit::AUDIT_STATUS_LEFT)->count(),
            'audit_type' => $this->getAuditTypeTextAttribute(),
            'audit_admin_count' => count($this->audit_admin ?? []),
        ];
    }

    /**
     * 检查区域是否可用
     */
    public function isAvailable()
    {
        return !empty($this->name) &&
            !empty($this->audit_type) &&
            !empty($this->audit_admin);
    }
}