<?php

namespace app\common\service;

use Carbon\Carbon;
use think\Validate;
use think\facade\Db;
use app\common\model\Io;
use app\common\model\Good;
use app\common\model\Repo;
use app\common\model\Admin;
use app\common\model\Stock;
use app\common\model\IoDetail;
use app\common\util\WhereBuilder;
use app\common\util\PhpSpreadsheetExportV2;

class IoService extends Service
{
    /**
     * 处理分页请求
     * 
     * @param array $params 请求参数数组
     * @return mixed 分页结果
     */
    public function page($params = [])
    {
        // 自动处理请求参数
        $this->autoParams($params);

        // 从请求参数中获取相关值
        $type = $this->pg('type');
        $change_type = $this->pg('change_type');
        $keyword = $this->pg('keyword');
        $repo_id = $this->pg('repo_id');
        $begin_date = $this->pg('begin_date');
        $end_date = $this->pg('end_date');

        // 如果存在结束日期，则向后延长一天
        if ($end_date) {
            $end_date = Carbon::parse($end_date)->addDay()->toDateString();
        }

        // 获取是否包含运输状态参数
        $contain_transit = $this->pgd(false, 'contain_transit');

        // 构建查询条件
        $where = WhereBuilder::builder()
            ->like('io.sn|r.name|io.remark', $keyword)
            ->in('io.type', $type)
            ->in('io.change_type', $change_type)
            ->in('io.repo_id', $repo_id)
            ->between('io.date', $begin_date, $end_date)
            ->where('d.transit_status', 'in', [IoDetail::TRANSIT_STATUS_TRANSIT, IoDetail::TRANSIT_STATUS_TRANSIT], $contain_transit)
            ->build();

        // 构建查询对象
        $query = (new Io)
            ->alias('io')
            ->field('io.*, r.name as repo_name')
            ->join('repo r', 'r.id = io.repo_id');

        // 如果包含运输状态，则进行关联查询
        if ($contain_transit) {
            $query = $query->join('io_detail d', 'd.io_id = io.id');
        }

        // 执行分页查询
        $page = $query->where($where)
            ->order('io.create_time desc')
            ->paginate($this->tp6Page());

        // 添加附加字段到分页结果集
        $page->getCollection()->append(['change_type_text']);

        // 返回分页结果
        return $page;
    }

    /**
     * 获取Io信息
     * 
     * @param array $params 请求参数数组
     * @return mixed Io对象
     */
    public function info($params = [])
    {
        // 自动处理请求参数
        $this->autoParams($params);

        // 查询单个Io对象
        $io = $this->one(Io::class);

        // 添加附加字段到Io对象
        $io->append(['change_type_text', 'details', 'repo', 'details.good']);

        // 返回Io对象
        return $io;
    }

    /**
     * 创建运输记录事务
     * 
     * @param Admin $admin 管理员对象
     * @param array $params 请求参数数组
     * @return mixed 运输记录创建结果
     */
    public function createTrans(Admin $admin, $params = [])
    {
        // 使用数据库事务执行创建操作
        return Db::transaction(fn() => $this->create($admin, $params));
    }

    /**
     * 创建运输记录
     * 
     * @param Admin $admin 管理员对象
     * @param array $params 请求参数数组
     * @return mixed 创建的Io对象
     * @throws \Exception 创建失败时抛出异常
     */
    public function create(Admin $admin, $params = [])
    {
        // 自动处理请求参数
        $params = $this->autoParams($params);

        // 如果存在管理员对象，则将管理员ID赋值给参数数组
        if ($admin) {
            $params['admin_id'] = $admin->id;
        }

        // 查询Repo对象
        $repo = $this->one(Repo::class, 'repo_id');

        // 获取出入库明细
        $details = $this->pg('details');
        // 过滤掉数量为0的明细
        $details = array_filter($details, fn($detail) => $detail['num']);

        // 创建Io对象
        $io = Io::create($params);

        // 赋值并检查明细
        foreach ($details as &$detail) {
            $detail['io_id'] = $io->id;
            $detail['date'] = isset($detail['date']) && $detail['date'] ? $detail['date'] : $io->date;
            $detail['type'] = isset($detail['type']) && $detail['type'] ? $detail['type'] : $io->type;
            $detail['repo_id'] = isset($detail['repo_id']) && $detail['repo_id'] ? $detail['repo_id'] : $io->repo_id;

            // 检查出入库数量
            if ($detail['num'] == 0) {
                $good = Good::find($detail['good_id']);
                throw $this->exception("物品--{$good?->name}的出入库数量不能为0");
            }
            if ($detail['num'] > 0 && $detail['type'] == Io::TYPE_OUT) {
                $good = Good::find($detail['good_id']);
                throw $this->exception("物品--{$good?->name}的出入库数量大于0但是类型为出库");
            }
            if ($detail['num'] < 0 && $detail['type'] == Io::TYPE_IN) {
                $good = Good::find($detail['good_id']);
                throw $this->exception("物品--{$good?->name}的出入库数量小于0但是类型为入库");
            }
        }

        // 保存出入库明细
        $details = (new IoDetail)->saveAll($details);

        // 在oninsert事件中进行库存变更
        $io->details = $details;

        // 返回创建的Io对象
        return $io;
    }


    /**
     * 导出运输记录
     * 
     * @param array $params 请求参数数组
     * @return mixed 导出结果
     */
    public function export($params = [])
    {
        // 自动处理请求参数
        $this->autoParams($params);

        $type = $this->pg('type');
        // 获取起始日期和结束日期
        $begin_date = $this->pg('begin_date');
        $end_date = $this->pg('end_date');

        // 如果存在结束日期，则向后延长一天
        if ($end_date) {
            $end_date = Carbon::parse($end_date)->addDay()->toDateString();
        }

        // 构建查询条件
        $where = WhereBuilder::builder()
            ->in('io.type', $type)
            ->between('i.date', $begin_date, $end_date)
            ->build();

        // 导出表格的表头
        $header = [
            [
                '编号',
                '仓库名',
                '出入库类型',
                '变更原因',
                '备注',
                '来源',
                '创建时间',
                '日期',
                '物品名',
                '数量',
                '明细备注',
                '在途状态',
                '归还数量',
                '遗失数量'
            ]
        ];

        // 构建查询字段中的change_type_export
        $changeTypeField = <<<SQL
            CASE i.change_type 
                WHEN 1 THEN "出入库" 
                WHEN 2 THEN "调拨" 
                WHEN 3 THEN "盘点" 
                ELSE "出入库" 
            END as change_type_export
        SQL;

        // 构建查询字段中的transit_status_export
        $transitStatusField = <<<SQL
            CASE d.transit_status
                WHEN "TRANSIT" THEN "在途"
                WHEN "COMPLETED" THEN "完成"
                ELSE ""
            END as transit_status_export
        SQL;

        // 执行查询
        $details = (new IoDetail)->alias('d')
            ->field('i.sn, r.name as repo_name, if(i.type = 1, "入库", "出库")')
            ->field($changeTypeField)
            ->field('i.remark, i.source, i.create_time, i.date')
            ->field('g.name as good_name, d.num, d.remark as detail_remark')
            ->field($transitStatusField)
            ->field('d.transit_received, d.transit_lost')
            ->join('io i', 'i.id = d.io_id', 'LEFT')
            ->join('repo r', 'r.id = i.repo_id', 'LEFT')
            ->join('good g', 'g.id = d.good_id', 'LEFT')
            ->where($where)
            ->select()
            ->toArray();

        // 导出表格文件
        $res = PhpSpreadsheetExportV2::outputFile(
            $details,
            $header,
            'io' . date('Ymdis'),
            []
        );

        // 返回导出结果
        return $res;
    }


    public function completeTrans(Admin $admin, $params = [])
    {
        return Db::transaction(fn() => $this->complete($admin, $params));
    }

    public function complete(Admin $admin, $params = [])
    {
        $params = $this->autoParams($params);
        $this->validate($params, new CompleteValidate);
        $transits = $this->pg('transits');
        foreach ($transits as &$transit) {
            /**
             * @var IoDetail
             */
            $detail = IoDetail::find($transit['id']);
            $stock = (new Stock)
                ->where('repo_id', '=', $detail->repo_id)
                ->where('good_id', '=', $detail->good_id)
                ->find();

            // 检查数量
            $num = abs($detail->num);
            if ($transit['transit_received'] + $transit['transit_lost'] == $num) {
                $transit['transit_status'] = IoDetail::TRANSIT_STATUS_COMPLETED;
            } elseif ($transit['transit_received'] + $transit['transit_lost'] > $num) {
                throw $this->exception("到达/归还数量{$transit['transit_received']} 加 在途遗失数{$transit['transit_lost']} 大于该出入库明细的数量：{$num}");
            } elseif ($transit['transit_received'] < $detail->transit_received) {
                throw $this->exception("到达/归还数量{$transit['transit_received']} 比原来还少了！(原数量：{$detail->transit_received}) 如发现归还数量错误，请使用盘点功能");
            } elseif ($transit['transit_lost'] < $detail->transit_lost) {
                throw $this->exception("在途遗失数量{$transit['transit_lost']} 比原来还少了！(原数量：{$detail->transit_lost}) 如发现遗失后又归还，请使用盘点功能");
            } else {
                $transit['transit_status'] = isset($transit['transit_status']) ? $transit['transit_status'] : IoDetail::TRANSIT_STATUS_TRANSIT;
            }

            $stock->num += self::getTypeMul($detail->type) * ($transit['transit_received'] - $detail->transit_received);
            $stock->save();

        }
        (new IoDetail)->allowField(['transit_status', 'transit_received', 'transit_lost'])->saveAll($transits);
        return true;
    }

    public function revertTrans(Admin $admin, $params = []) {
        return Db::transaction(fn() => $this->revert($admin, $params));
    }

    protected function revert(Admin $admin, $params = [])
    {
        $this->autoParams($params);
        $io = $this->one(Io::class);
        if ($io->revert_id) {
            return true;
        }
        $revertData = [
            'repo_id' => $io->repo_id,
            'date' => date('Ymd'),
            'type' => self::inverseIoType($io['type']),
            'sn' => 'REVERT_T' . hrtime(true) . '_SN' . rand(100000, 999999),
            'remark' => "回滚自$io->sn",
            'admin_id' => $admin->id,
            'change_type' => $io->change_type,
            'source' => "$io->sn"
        ];
        $revert = Io::create($revertData);

        $revertDetails = [];
        foreach ($io->details as $detail) {
            $revertDetail = [
                'repo_id' => $detail->repo_id,
                'good_id' => $detail->good_id,
                'num' => -$detail['num'],
                'date' => date('Ymd'),
                'type' => self::inverseIoType($detail['type']),
                'remark' => '回滚',
                'io_id' => $revert->id,
            ];
            $revertDetails[] = $revertDetail;
        }
        $details = (new IoDetail)->saveAll($revertDetails);

        $io->revert_id = $revert->id;
        $io->save();
        return $revert;
    }

    /**
     * 翻转出入库类型
     *
     * @param int $type 出入库类型
     * @return int 翻转后的出入库类型
     */
    protected static function inverseIoType(int $type)
    {
        return $type == Io::TYPE_IN ? Io::TYPE_OUT : Io::TYPE_IN;
    }

    /**
     * 获取出入库类型的乘数
     *
     * @param int $type 出入库类型
     * @return int 出入库类型的乘数
     */
    protected static function getTypeMul(int $type)
    {
        return $type == Io::TYPE_IN ? 1 : -1;
    }

}

class CreateIoValidate extends Validate
{
    protected $rule = [
        'repo_id|仓库' => 'require',
        'valid|状态' => 'require',
        'type|出入库类型' => 'require',
        'change_type|变更类型' => 'require',
        'details|出入库内容' => 'checkDetails',
    ];

    protected function checkDetails($details)
    {
        if (!is_array($details)) {
            return 'details必须为数组';
        }
        if (!$details) {
            return '出入库内容不能为空';
        }
        $setAndNotEmpty = fn($item, $index) => isset($item[$index]) && $item[$index];
        $requires = ['good_id', 'num', 'type', 'remark'];
        foreach ($details as $index => $detail) {
            foreach ($requires as $require) {
                if (!$setAndNotEmpty($detail, $require)) {
                    return "details[$index].$require 不能为空";
                }
            }
            $good_id = $detail['good_id'];
            $good = Good::find($good_id);
            if (!$good) {
                return "未找到物品对象, id={$good_id}";
            }
        }

        return true;
    }
}

class CompleteValidate extends Validate
{
    protected $rule = [
        'transits' => 'array'
    ];
}