<?php

namespace app\common\service;

use app\common\model\InvItem;
use app\common\model\InvStockLog;
use app\common\validate\InvRequisitionValidate;
use app\common\traits\crud\CrudServiceTrait;
use app\common\model\InvRequisition;
use app\common\model\InvRequisitionAttachment;
use app\common\model\InvRequisitionItem;
use Illuminate\Database\Eloquent\Model;
use support\Request;
use support\Db;
use support\exception\BusinessException;

class InvRequisitionService
{

    use CrudServiceTrait;

    /**
     * 指定当前要操作的模型
     */
    protected string $modelClass = InvRequisition::class;

    /**
     * 验证器
     */
    protected $validator = InvRequisitionValidate::class;

    /**
     * 获取验证器
     */
    public function getValidator()
    {
        return  new $this->validator;
    }

    /**
     * 构造 CrudUtil 查询配置
     */
    protected function buildQueryConfig(Request $request, string $scene = 'default'): array
    {
        $p = $request->all();

        $config = [];
        $config['model'] = $this->modelClass;
        switch ($scene) {
            case 'default':
                $config['where']['status'] = 1;
                $config['order']['sort'] = 'desc';
                $config['order']['id'] = 'desc';
                break;
            case 'index':
                if(isset($p['status']) && $p['status']){
                    $config['where']['status'] = $p['status'];
                }
                if (isset($p['applicant_id']) && $p['applicant_id'] == 'self') { //自己的领用申请
                    $config['where']['applicant_id'] = $request->user->uid;
                } elseif (isset($p['applicant_id']) && $p['applicant_id']) { //指定人员的申请
                    $config['where']['applicant_id'] = $p['applicant_id'];
                }
               /* else { //审批人对应的记录
                    $config['with'] = ['approval'];
                    $config['where']['approval.approver_id'] = $request->user->uid;
                    //$config['where']['approval.action'] = 0;
                }*/
                if(isset($p['phase']) && $p['phase'] == 'approve'){//借用审批中
                    $config['where']['status'] = ['in',[10,11]];
                    if(isset($p['scene']) && $p['scene'] == 'approval'){
                        $config['with'] = ['approval'];
                        $config['where']['approval.action'] = 0;
                    }
                }elseif(isset($p['phase']) && $p['phase'] == 'repaid'){//已全部归还
                    $config['where']['status'] = 17;
                }elseif(isset($p['phase']) && $p['phase'] == 'unreturned'){ //未归还
                    $config['where']['status'] = ['in',[11,12,13,14,15,16,18,19]];
                }
                //审核列表
                elseif(isset($p['phase']) && $p['phase'] == 'pending'){ //待审核
                    $config['where']['status'] = ['in',[10,11]];
                    $config['with'] = ['approval'];
                    $config['where']['approval.approver_id'] = $request->user->uid;
                    $config['where']['approval.action'] = 0;
                }elseif(isset($p['phase']) && $p['phase'] == 'approved'){ //已通过
                    $config['where']['status'] = ['in',[11,12,14,15,16,17,18,19]];
                    $config['with'] = ['approval'];
                    $config['where']['approval.approver_id'] = $request->user->uid;
                    $config['where']['approval.action'] = [">",0];
                }elseif(isset($p['phase']) && $p['phase'] == 'refuse'){ //拒绝,未通过
                    $config['where']['status'] = ['in',[13]];
                }
                $config['order']['id'] = 'desc';
                break;
            case 'show':
                $config['where']['id'] = $p['id'];
                break;
            case 'store':
                break;
            case 'update':
                $config['where']['id'] = $p['id'];
                break;
            case 'destroy':
                $config['where']['id'] = $p['id'];
                break;
        }

        return $config;
    }

    /**
     * 创建物品申请 前置
     *
     * @param array $data
     * @param Request $request
     * @return array
     */
    public function beforeServiceStore($data, Request $request): array
    {
        $user = (new UserService())->getUserInfo($request->user->uid, '');

        if (empty($user['user']['id']) || empty($user['user']['name'])) {
            throw new BusinessException('无法获取当前用户信息');
        }

        $data['order_no'] = $this->generateOrderNo();
        $data['applicant_id'] = (int)$user['user']['id'];
        $data['applicant_name'] = (string)$user['user']['name'];
        $data['leader_id'] = $user['user']['report_to'];
        $data['status'] = 10;

        //查询物品管理人是否是一个
        if(count($data['items'])>=2){
            $manage_user = [];
            foreach ($data['items'] as $item) {
                $manage_user[] = InvItem::where('id',$item['item_id'])->value('manage_user_id');
            }
            $manage_user = array_unique($manage_user);
            if(count($manage_user)>1){
                throw new BusinessException("物品管理员不是同一人");
            }
        }

        return $data;
    }

    /**
     * 处理物品申请
     *
     * @param Request $request
     * @param array $data
     * @return array
     */
    public function serviceStore(Request $request, array $data, string $scene = '')
    {
        try {
            // 关联表增加事务处理
            return Db::transaction(function () use ($request, $data) {
                $data = $this->preProcess('Store', $data, $request);
                $dl   = $this->getDataLimitFromRequest($request);
                $created = $this->logicCreate($data, $dl);
                // 处理物品申请项
                $this->processRequisitionItems($created, $data['items']);
                // 处理物品申请附件
                $this->processRequisitionAttachmentItems($created, $data['attachment']);
                $res = $this->postProcess('Store', $created);

                $manage_user_id = InvItem::where('id',$data['items'][0]['item_id'])->value('manage_user_id');
                $approval = [
                    'id' => $res['id'], //申请单id
                    'applicant_id' => $res['applicant_id'], //申请人id
                    'manage_user_id' => $manage_user_id,
                ];
                $this->startApproval($approval);

                return $res;
            });
        } catch (\Throwable $e) {
            throw new BusinessException("创建物品申请失败：".$e->getMessage());
        }
    }

    /**
     * 启动审批
     */
    public function startApproval($requisition)
    {
        // 启动审批
        //$appro = new \app\common\utils\approval\service\ApprovalFlowService();
        $appro = new \app\common\service\InvRequisitionApproveService();
        $formData = [
            'manage_user_id' => $requisition['manage_user_id'],
        ];
        return $appro->start('inv_requisition', 'inv_requisition', $requisition['id'], $formData, $requisition['applicant_id']);
    }

    /**
     * 更新物品申请
     *
     * @param Request $request
     * @param array $data
     * @return array
     */
    public function serviceUpdate(Request $request, array $data, string $scene = '')
    {
        try {
            // 关联表增加事务处理
            return Db::transaction(function () use ($request, $data) {
                $data = $this->preProcess('Update', $data, $request);
                $config = $this->buildQueryConfig($request, 'update');

                // 获取申请项/附件
                $items = $data['items'];
                $attachment = $data['attachment'];
                unset($data['items']);
                unset($data['attachment']);
                
                // 执行更新操作
                $this->logicUpdateBy($config, $data);
                
                // 获取更新后的完整记录
                $updated = $this->logicShow($config);

                // 重新创建新的申请项
                $this->processRequisitionItems((object)$updated, $items, true);

                // 重新创建新的附件
                $this->processRequisitionAttachmentItems((object)$updated, $attachment, true);
                
                return $this->postProcess('Update', $updated);
            });
        } catch (\Throwable $e) {
            throw new BusinessException("更新物品申请失败：" . $e->getMessage()."|".$e->getLine()."|".$e->getFile());
        }
    }

    /**
     * 处理物品申请项
     *
     * @param Model $created
     * @param array $items
     * @return void
     */
    private function processRequisitionItems(Model $created, array $items, bool $isUpdate = false): void
    {
        if ($isUpdate) {
            $this->clearRequisitionItems($created->id);
        }
        
        foreach ($items as $item) {
            $invitem = InvItem::where('id',$item)->first();
            $itemData = [
                'requisition_id'        => $created->id,
                'item_id'               => $item['item_id'],
                'item_name_snap'        => $item['item_name_snap'],  // 修改：使用 snap 字段
                'spec_model_snap'       => $item['spec_model_snap']??'', // 修改：使用 snap 字段
                'unit_snap'             => $item['unit_snap']??'',       // 修改：使用 snap 字段
                'is_consumable_snap'    => $item['is_consumable_snap']?? ($invitem['is_consumable_snap']??0), // 修改：使用 snap 字段
                'request_qty'           => (int) $item['request_qty'] ?? 1, // 动态获取数量，转为整型
                'approved_qty'          => (int) $item['request_qty'] ?? 1, // 初始审批数量等于申请数量
                'remark'                => $item['remark'] ?? ''
            ];
            InvRequisitionItem::create($itemData);
        }
    }

    /**
     * 处理物品申请项
     *
     * @param Model $created
     * @param array $items
     * @return void
     */
    private function processRequisitionAttachmentItems(Model $created, array $attachment, bool $isUpdate = false): void
    {
        if ($isUpdate) {
            $this->clearRequisitionAttachmentItems($created->id);
        }

        foreach ($attachment as $file) {
            $attachmentData = [
                'requisition_id'    => $created->id,
                'file_name'         => $file['original_name'],
                'file_path'         => $file['file_path']
            ];
            InvRequisitionAttachment::create($attachmentData);
        }
    }

    /**
     * 删除申请项
     *
     * @param int $requisitionId
     * @return void
     */
    public function clearRequisitionItems(int $requisitionId): void
    {
        InvRequisitionItem::where('requisition_id', $requisitionId)->delete();
    }

    /**
     * 删除申请项
     *
     * @param int $requisitionId
     * @return void
     */
    public function clearRequisitionAttachmentItems(int $requisitionId): void
    {
        InvRequisitionAttachment::where('requisition_id', $requisitionId)->delete();
    }
    
    /**
     * 生成申请单号
     *
     * @return string
     */
    private function generateOrderNo(): string
    {
        return 'RQ' . date('Ymd') . strtoupper(substr(uniqid(), -6));
    }

    /**
     * 扫码领取物品
     *
     * @param Request $request
     * @param array $data
     * @return array
     * @throws BusinessException
     */
    public function qrClaim(Request $request, array $data): array
    {
        return Db::transaction(function () use ($request, $data) {
            $itemId = (int)($data['item_id'] ?? 0);
            $qty = (int)($data['qty'] ?? 1);

            if ($itemId <= 0) {
                throw new BusinessException('物品ID无效');
            }
            if ($qty <= 0) {
                throw new BusinessException('领取数量必须大于0');
            }

            // 获取物品信息
            $item = InvItem::find($itemId);
            if (!$item) {
                throw new BusinessException('物品不存在');
            }

            // 检查是否允许扫码领取
            if (!$item->allow_qr_claim) {
                throw new BusinessException('该物品不允许扫码领取');
            }

            // 获取用户信息
            $user = (new UserService())->getUserInfo($request->user->uid, '');
            $applicantId = (int)$user['user']['id'];
            $applicantName = (string)$user['user']['name'];

            // 检查扫码领取数量限制
            if ($item->qr_code_num > 0) {
                // 查询该用户已扫码领取该物品的数量
                $claimedQty = InvRequisitionItem::whereHas('requisition', function ($q) use ($applicantId) {
                    $q->where('applicant_id', $applicantId)
                        ->where('claim_type', InvRequisition::CLAIM_TYPE_QR);
                })->where('item_id', $itemId)
                    ->sum('approved_qty');

                if (($claimedQty + $qty) > $item->qr_code_num) {
                    throw new BusinessException("扫码领取数量超限，每人最多可领取 {$item->qr_code_num} {$item->unit}，已领取 {$claimedQty} {$item->unit}");
                }
            }

            // 检查库存
            if ($item->stock_qty < $qty) {
                throw new BusinessException('库存不足，当前库存: ' . $item->stock_qty);
            }

            // 创建领用申请记录（直接完成）
            $requisition = InvRequisition::create([
                'order_no' => $this->generateOrderNo(),
                'applicant_company_id' => $user['user']['company_id'] ?? 0,
                'dept_id' => $user['user']['dept_id'] ?? 0,
                'applicant_id' => $applicantId,
                'applicant_name' => $applicantName,
                'leader_id' => $user['user']['report_to'] ?? 0,
                'manager_id' => $item->manage_user_id,
                'borrow_reason' => '扫码领取',
                'use_start_date' => date('Y-m-d', time()),
                'use_end_date' => date('Y-m-d', time()),
                'status' => 19, // 已审批（无需归还）
                'claim_type' => InvRequisition::CLAIM_TYPE_QR,
                'qr_claim_time' => time(),
                'remark' => $data['remark'] ?? '扫码领取',
            ]);

            // 创建领用明细
            InvRequisitionItem::create([
                'requisition_id' => $requisition->id,
                'item_id' => $itemId,
                'item_name_snap' => $item->item_name,
                'spec_model_snap' => $item->spec_model,
                'unit_snap' => $item->unit,
                'is_consumable_snap' => $item->is_consumable,
                'request_qty' => $qty,
                'approved_qty' => $qty,
                'remark' => '扫码领取',
            ]);

            // 扣减库存
            (new InvItemService())->stockOut($itemId, $qty, false, [
                'biz_type' => InvStockLog::BIZ_TYPE_QR_CLAIM,
                'biz_no' => $requisition->order_no,
                'operator_id' => $applicantId,
                'operator_name' => $applicantName,
                'remark' => '扫码领取',
            ]);

            return $requisition->toArray();
        });
    }

    /**
     * 管理员代领（支持多人）
     *
     * @param Request $request
     * @param array $data
     * @return array
     * @throws BusinessException
     */
    public function proxyClaim(Request $request, array $data): array
    {
        return Db::transaction(function () use ($request, $data) {
            $itemId = (int)($data['item_id'] ?? 0);
            $qty = (int)($data['qty'] ?? 1);
            $targetUserIds = $data['target_user_id'];

            if ($itemId <= 0) {
                throw new BusinessException('物品ID无效');
            }
            if ($qty <= 0) {
                throw new BusinessException('领取数量必须大于0');
            }
            if (empty($targetUserIds)) {
                throw new BusinessException('请选择代领用户');
            }

            // 获取物品信息
            $item = InvItem::find($itemId);
            if (!$item) {
                throw new BusinessException('物品不存在');
            }

            $targetUserIds = explode(',', $targetUserIds);

            // 获取操作人（管理员）信息
            $proxyUser = (new UserService())->getUserInfo($request->user->uid, '');
            $proxyUserId = (int)$proxyUser['user']['id'];
            $proxyUserName = (string)$proxyUser['user']['name'];

            // 验证操作人是否是物品管理员
            if ($item->manage_user_id != $proxyUserId) {
                throw new BusinessException('您不是该物品的管理员，无权代领');
            }

            // 计算总需求量
            $totalQty = $qty * count($targetUserIds);

            // 检查库存
            if ($item->stock_qty < $totalQty) {
                throw new BusinessException('库存不足，当前库存: ' . $item->stock_qty . '，需要: ' . $totalQty);
            }

            $createdRequisitions = [];
            $remark = $data['remark'] ?? '管理员代领';

            // 为每个目标用户创建领用记录
            foreach ($targetUserIds as $targetUserId) {
                $targetUserId = (int)$targetUserId;
                if ($targetUserId <= 0) {
                    continue;
                }

                // 获取目标用户信息
                $targetUser = (new UserService())->getUserInfo($targetUserId, '');
                if (!$targetUser['user']) {
                    throw new BusinessException('用户ID ' . $targetUserId . ' 不存在');
                }

                // 创建领用申请记录（直接完成）
                $requisition = InvRequisition::create([
                    'order_no' => $this->generateOrderNo(),
                    'applicant_company_id' => $targetUser['user']['company_id'] ?? 0,
                    'dept_id' => $targetUser['user']['dept_id'] ?? 0,
                    'applicant_id' => $targetUserId,
                    'applicant_name' => $targetUser['user']['name'],
                    'leader_id' => $targetUser['user']['report_to'] ?? 0,
                    'manager_id' => $item->manage_user_id,
                    'borrow_reason' => $data['borrow_reason'] ?? '管理员代领',
                    'use_start_date' => date('Y-m-d', time()),
                    'use_end_date' => date('Y-m-d', time()),
                    'status' => 19, // 已审批（无需归还）
                    'claim_type' => InvRequisition::CLAIM_TYPE_PROXY,
                    'proxy_claim_user_id' => $proxyUserId,
                    'proxy_claim_user_name' => $proxyUserName,
                    'remark' => $remark,
                ]);

                // 创建领用明细
                InvRequisitionItem::create([
                    'requisition_id' => $requisition->id,
                    'item_id' => $itemId,
                    'item_name_snap' => $item->item_name,
                    'spec_model_snap' => $item->spec_model,
                    'unit_snap' => $item->unit,
                    'is_consumable_snap' => $item->is_consumable,
                    'request_qty' => $qty,
                    'approved_qty' => $qty,
                    'remark' => $remark,
                ]);

                $createdRequisitions[] = $requisition->toArray();
            }

            // 一次性扣减总库存
            (new InvItemService())->stockOut($itemId, $totalQty, false, [
                'biz_type' => InvStockLog::BIZ_TYPE_PROXY_CLAIM,
                'biz_no' => 'PROXY_' . time(),
                'operator_id' => $proxyUserId,
                'operator_name' => $proxyUserName,
                'remark' => '管理员代领(' . count($targetUserIds) . '人×' . $qty . ')',
            ]);

            return [
                'created_count' => count($createdRequisitions),
                'requisitions' => $createdRequisitions,
                'total_qty' => $totalQty,
            ];
        });
    }

    /**
     * 查询扫码/代领记录列表
     *
     * @param Request $request
     * @return array
     */
    public function qrClaimsList(Request $request): array
    {
        $query = InvRequisition::query()->with(['items']);

        // 只查询扫码领取和代领记录
        $query->whereIn('claim_type', [
            InvRequisition::CLAIM_TYPE_QR,
            InvRequisition::CLAIM_TYPE_PROXY
        ]);

        // 按申请人筛选（移动端"我的记录"功能）
        if ($request->get('applicant_id') === 'self') {
            $query->where('applicant_id', $request->user->uid);
        } elseif (!empty($request->get('applicant_id'))) {
            $query->where('applicant_id', $request->get('applicant_id'));
        }

        // 按领取方式筛选
        if (!empty($request->get('claim_type'))) {
            $query->where('claim_type', $request->get('claim_type'));
        }

        // 按代领操作人筛选
        if (!empty($request->get('proxy_user_id'))) {
            $query->where('proxy_claim_user_id', $request->get('proxy_user_id'));
        }

        // 按物品ID筛选
        if (!empty($request->get('item_id'))) {
            $query->whereHas('items', function ($q) use ($request) {
                $q->where('item_id', $request->get('item_id'));
            });
        }

        // 时间范围筛选
        if (!empty($request->get('start_time'))) {
            $query->where('created_at', '>=', strtotime($request->get('start_time')));
        }
        if (!empty($request->get('end_time'))) {
            $query->where('created_at', '<=', strtotime($request->get('end_time')));
        }

        // 排序
        $query->orderBy('id', 'desc');

        // 分页
        $perPage = $request->get('size', 20);
        $page = $request->get('current', 1);

        $result = $query->paginate($perPage, ['*'], 'page', $page);

        return [
            'records' => $result->getCollection()->map(function ($req) {
                return [
                    'id' => $req->id,
                    'order_no' => $req->order_no,
                    'applicant_id' => $req->applicant_id,
                    'applicant_name' => $req->applicant_name,
                    'claim_type' => $req->claim_type,
                    'claim_type_text' => InvRequisition::getClaimTypeText($req->claim_type),
                    'qr_claim_time' => $req->qr_claim_time ? date('Y-m-d H:i:s', $req->qr_claim_time) : null,
                    'proxy_claim_user_id' => $req->proxy_claim_user_id,
                    'proxy_claim_user_name' => $req->proxy_claim_user_name,
                    'status' => $req->status,
                    'borrow_reason' => $req->borrow_reason,
                    'remark' => $req->remark,
                    'created_at' => $req->created_at ? $req->created_at->format('Y-m-d H:i:s') : null,
                    'items' => $req->items->map(function ($item) {
                        return [
                            'item_id' => $item->item_id,
                            'item_name_snap' => $item->item_name_snap,
                            'approved_qty' => $item->approved_qty,
                        ];
                    })->toArray(),
                ];
            })->toArray(),
            'total' => $result->total(),
            'current' => $result->currentPage(),
            'size' => $result->perPage(),
        ];
    }
}