<?php

namespace app\admin\controller\fc;

use app\common\controller\Backend;
use think\Db;

/**
 * 同城-优惠券管理
 *
 * 说明：fa_fc_coupon 暂无对应模型类，因此列表与增删改直接查库（字段与 FcInstall::tables() 一致）。
 *   name 名称 / type 类型(fixed 满减, discount 折扣) / amount 面额(折扣) / min_amount 使用门槛 /
 *   total 发放总量 / received 已领取(只读) / days 有效天数 / enabled 是否启用 / sort 排序
 *
 * @icon fa fa-ticket
 */
class Coupon extends Backend
{
    /** 优惠券类型 */
    const TYPES = ['fixed', 'discount'];

    /** 快速搜索字段（默认仅 id，搜不到券名） */
    protected $searchFields = 'name';

    /**
     * 查看（列表数据）
     */
    public function index()
    {
        $this->request->filter(['strip_tags', 'trim']);
        if (false === $this->request->isAjax()) {
            return $this->view->fetch();
        }

        list($where, $sort, $order, $offset, $limit) = $this->buildparams();
        $list = Db::name('fc_coupon')
            ->where($where)
            ->order($sort, $order)
            ->paginate($limit);

        return json(['total' => $list->total(), 'rows' => $list->items()]);
    }

    /**
     * 添加
     */
    public function add()
    {
        // 与 index() 一致：统一过滤 XSS 载荷（列表用 bootstrap-table 原样渲染，未过滤会造成存储型 XSS）
        $this->request->filter(['strip_tags', 'trim']);
        if (false === $this->request->isPost()) {
            return $this->view->fetch();
        }
        $params = $this->request->post('row/a');
        if (empty($params)) {
            $this->error(__('Parameter %s can not be empty', ''));
        }

        $data = $this->buildData($params);
        $now = time();
        // 已领取数量只读，新增时固定为 0
        $data['received']   = 0;
        $data['createtime'] = $now;
        $data['updatetime'] = $now;

        if (false === Db::name('fc_coupon')->insert($data)) {
            $this->error('优惠券添加失败');
        }

        $this->success();
        return null;
    }

    /**
     * 编辑
     *
     * @param mixed $ids
     */
    public function edit($ids = null)
    {
        // 与 index() 一致：统一过滤 XSS 载荷
        $this->request->filter(['strip_tags', 'trim']);
        $row = Db::name('fc_coupon')->where('id', (int)$ids)->find();
        if (!$row) {
            $this->error(__('No Results were found'));
        }
        if (false === $this->request->isPost()) {
            $this->view->assign('row', $row);
            return $this->view->fetch();
        }

        $params = $this->request->post('row/a');
        if (empty($params)) {
            $this->error(__('Parameter %s can not be empty', ''));
        }

        $data = $this->buildData($params);
        // 已领取数量只读，编辑时不修改
        $data['updatetime'] = time();

        if (false === Db::name('fc_coupon')->where('id', (int)$ids)->update($data)) {
            $this->error(__('No rows were updated'));
        }

        $this->success();
        return null;
    }

    /**
     * 删除
     *
     * @param mixed $ids
     */
    public function del($ids = null)
    {
        if (false === $this->request->isPost()) {
            $this->error(__('Invalid parameters'));
        }
        $ids = $ids ?: $this->request->post('ids');
        if (empty($ids)) {
            $this->error(__('Parameter %s can not be empty', 'ids'));
        }

        $count = Db::name('fc_coupon')->where('id', 'in', $ids)->delete();
        if (!$count) {
            $this->error(__('No rows were deleted'));
        }

        $this->success();
        return null;
    }

    /**
     * 批量更新（仅允许「是否启用 / 排序」）
     *
     * @param mixed $ids
     */
    public function multi($ids = null)
    {
        if (false === $this->request->isPost()) {
            $this->error(__('Invalid parameters'));
        }
        $ids = $ids ?: $this->request->post('ids');
        if (empty($ids)) {
            $this->error(__('Parameter %s can not be empty', 'ids'));
        }
        if (false === $this->request->has('params')) {
            $this->error(__('No rows were updated'));
        }

        parse_str($this->request->post('params'), $values);
        $values = array_intersect_key($values, array_flip(['enabled', 'sort']));
        if (empty($values)) {
            $this->error(__('You have no permission'));
        }
        if (isset($values['enabled'])) {
            $values['enabled'] = !empty($values['enabled']) ? 1 : 0;
        }
        if (isset($values['sort'])) {
            $values['sort'] = (int)$values['sort'];
        }
        $values['updatetime'] = time();

        $count = Db::name('fc_coupon')->where('id', 'in', $ids)->update($values);
        if (!$count) {
            $this->error(__('No rows were updated'));
        }

        $this->success();
        return null;
    }

    /**
     * 校验并整理表单数据
     *
     * @param array $params
     * @return array
     */
    protected function buildData(array $params)
    {
        $name = isset($params['name']) ? trim((string)$params['name']) : '';
        if ($name === '') {
            $this->error('优惠券名称不能为空');
        }
        if (mb_strlen($name, 'utf-8') > 64) {
            $this->error('优惠券名称不能超过 64 个字');
        }

        $type = isset($params['type']) ? trim((string)$params['type']) : 'fixed';
        if (!in_array($type, self::TYPES, true)) {
            $this->error('优惠券类型只支持「满减券」或「折扣券」');
        }

        $amount    = isset($params['amount']) ? round((float)$params['amount'], 2) : 0;
        $minAmount = isset($params['min_amount']) ? round((float)$params['min_amount'], 2) : 0;
        $total     = isset($params['total']) ? (int)$params['total'] : 0;
        $days      = isset($params['days']) ? (int)$params['days'] : 0;
        $sort      = isset($params['sort']) ? (int)$params['sort'] : 0;
        $enabled   = !empty($params['enabled']) ? 1 : 0;

        if ($type === 'fixed') {
            if ($amount <= 0) {
                $this->error('满减券的面额必须大于 0');
            }
        } else {
            if ($amount <= 0 || $amount >= 10) {
                $this->error('折扣券的折扣数必须大于 0 且小于 10（如 8.5 表示 8.5 折）');
            }
        }
        if ($minAmount < 0) {
            $this->error('使用门槛不能为负（0 表示无门槛）');
        }
        if ($total < 0) {
            $this->error('发放总量不能为负（0 表示不限量）');
        }
        if ($days < 0) {
            $this->error('有效天数不能为负（0 表示永久有效）');
        }

        return [
            'name'       => $name,
            'type'       => $type,
            'amount'     => $amount,
            'min_amount' => $minAmount,
            'total'      => $total,
            'days'       => $days,
            'enabled'    => $enabled,
            'sort'       => $sort,
        ];
    }
}