'use strict';

/**
 *
 *
 * @author Mai
 * @date 2018/10/15
 * @version
 */

module.exports = app => {
    class CategoryValue extends app.BaseService {
        /**
         * 构造函数
         *
         * @param {Object} ctx - egg全局变量
         * @return {void}
         */
        constructor(ctx) {
            super(ctx);
            this.tableName = 'category_value';
        }

        /**
         * 新增分类值
         *
         * @param categoryId - 分类Id
         * @param value - 值
         * @returns {Promise<void>}
         * @private
         */
        async _addValue(categoryId, value) {
            const count = await this.count({cid: categoryId, value: value});
            if (count > 0) {
                throw '该分类下存在相同的值';
            }

            const newValue = {
                cid: categoryId,
                value: value,
            };
            const result = await this.transaction.insert(this.tableName, newValue);
            if (result.affectedRows !== 1) {
                throw '提交数据失败';
            } else {
                category.id = result.insertId;
            }

            category.value = category.value && category.value !== '' ? JSON.parse(category.value) : [];
            return category;
        }

        async _deleteAndUpdateValue(orgValue, newValue) {
            if (!orgValue || orgValue.length === 0) { return }
            for (const ov of orgValue) {
                const nv = _.find(newValue, function (v) {
                    return v.id === orgValue.id;
                });
                if (!nv) {
                    await this.transaction.delete(this.tableName, {id: orgValue.id});
                } else if (nv.value !== ov.value) {
                    await this.transaction.update(this.tableName, {id: orgValue.id, value: nv.value});
                }
            }
        }

        async setCategoryValue(cid, value) {
            const orgValue = await this.getAllDataByCondition({ where: {cid: cid} });
            const tenders = await this.ctx.service.tender.getList();

            this.transaction = await this.db.beginTransaction();
            try {
                // 删除值 & 更新值
                await this._deleteAndUpdateValue(orgValue, value);
                // 新增值
                const newValue = value.filter(function (v) {
                    return !v.id;
                });
                for (const nv of newValue) {
                    nv.cid = cid;
                    nv.pid = this.ctx.session.sessionProject.id;
                    const result = await this.transaction.insert(this.tableName, nv);
                    nv.id = result.insertId;
                }
                // 更新标段属性
                for (const t of tenders) {
                    const category = t.category ? t.category : [];
                    const cate = _.find(t.category, function (c) {
                        return c.cid === cid;
                    });
                    const tenderValue = cate ? _.find(value, function (v) {return v.id === cate.value;}) : null;
                    if (!tenderValue) {
                        category.push({cid: cid, value: newValue[0].id});
                        await this.transaction.update(this.service.tender.tableName, {
                            id: t.id,
                            category: JSON.stringify(category),
                        });
                    }
                }
                await this.transaction.commit();
            } catch(error) {
                await this.transaction.rollback();
                throw error;
            }
        }

    }

    return CategoryValue;
};