'use strict';

/**
 *
 *
 * @author Mai
 * @date
 * @version
 */
const rootId = '-1';
const filingType = [
    { value: 1, name: '立项文件' },
    { value: 2, name: '招标投标、合同协议文件' },
    { value: 3, name: '勘察、设计文件' },
    { value: 4, name: '征地、拆迁、移民文件' },
    { value: 5, name: '项目管理文件' },
    { value: 6, name: '施工文件' },
    { value: 7, name: '信息系统开发文件' },
    { value: 8, name: '设备文件' },
    { value: 9, name: '监理文件' },
    { value: 10, name: '科研项目文件' },
    { value: 11, name: '生产技术准备、试运行文件' },
    { value: 12, name: '竣工验收文件' },
];

module.exports = app => {
    class Filing extends app.BaseService {

        /**
         * 构造函数
         *
         * @param {Object} ctx - egg全局变量
         * @param {String} tableName - 表名
         * @return {void}
         */
        constructor(ctx) {
            super(ctx);
            this.tableName = 'filing';
            this.filingType = filingType;
        }

        get allFilingType () {
            return filingType.map(x => { return x.value });
        }

        async initFiling(spid, templateId, transaction) {
            const count = await this.count({ spid });
            if (count > 0) return;

            const templateFiling = await this.ctx.service.filingTemplate.getAllDataByCondition({
                where: { temp_id: templateId },
                orders: [['tree_level', 'asc']],
            });
            const insertData = [];
            for (const f of templateFiling) {
                f.newId = this.uuid.v4();
                const parent = f.tree_pid !== rootId ? templateFiling.find(x => { return x.id === f.tree_pid; }) : null;
                const newData = {
                    id: f.newId, tree_pid : parent ? parent.newId : rootId, tree_level: f.tree_level, tree_order: f.tree_order,
                    spid, add_user_id: this.ctx.session.sessionUser.accountId, is_fixed: f.tree_level === 1,
                    filing_type: f.filing_type, name: f.name,
                };
                insertData.push(newData);
            }
            if (transaction) {
                await transaction.insert(this.tableName, insertData);
            } else {
                await this.db.insert(this.tableName, insertData);
            }
        }

        async getValidFiling(spid, filingType) {
            const condition = { spid, is_deleted: 0 };
            if (filingType !== 'all') condition.filing_type = filingType;
            if (!filingType || filingType.length === 0) return [];
            return await this.getAllDataByCondition({ where: condition });
        }


        async getPosterityData(id){
            const result = [];
            let cur = await this.getAllDataByCondition({ where: { tree_pid: id } });
            let iLevel = 1;
            while (cur.length > 0 && iLevel < 6) {
                result.push(...cur);
                cur = await this.getAllDataByCondition({ where: { tree_pid: cur.map(x => { return x.id })} });
                iLevel += 1;
            }
            return result;
        }

        _checkFixed(data) {
            if (data.is_fixed) throw '固定分类，不可编辑';
        }

        async getNewName(spid, name = '新增文件类别') {
            const data = await this.db.query(`SELECT * FROM ${this.tableName} WHERE spid = '${spid}' AND name LIKE '${name}%'`);
            if (data.length === 0) return name;

            const _ = this._;
            const names = data.map(x => { return _.toInteger(x.name.replace(name, '')) });
            const filterNames = names.filter(x => { return x > 0 });
            const max = filterNames.reduce((pre, cur) => { return Math.max(pre, cur); }, 0);
            return max >= 0 ? name + (max + 1) : name;
        }

        async add(data) {
            const parent = await this.getDataById(data.tree_pid);
            if (!parent) throw '添加数据结构错误';
            if (parent.file_count > 0) throw `分类【${parent.name}】下存在文件，不可添加子分类`;

            const sibling = await this.getAllDataByCondition({ where: { tree_pid: parent.id }, orders: [['tree_order', 'asc']]});
            const preChild = data.tree_pre_id ? sibling.find(x => { return x.id === data.tree_pre_id; }) : null;

            const conn = await this.db.beginTransaction();
            try {
                // 获取当前用户信息
                const sessionUser = this.ctx.session.sessionUser;
                // 获取当前项目信息
                const sessionProject = this.ctx.session.sessionProject;

                const tree_order = preChild ? preChild.tree_order + 1 : (sibling.length > 0 ? sibling[sibling.length - 1].tree_order + 1 : 1);
                const name = await this.getNewName(parent.spid);
                const insertData = {
                    id: this.uuid.v4(), spid: parent.spid, add_user_id: sessionUser.accountId,
                    tree_pid: parent.id, tree_level: parent.tree_level + 1, tree_order,
                    name, filing_type: parent.filing_type,
                };
                const operate = await conn.insert(this.tableName, insertData);
                if (operate.affectedRows === 0) throw '新增文件夹失败';

                const updateData = [];
                if (preChild) {
                    sibling.forEach(x => {
                        if (x.tree_order >= tree_order) updateData.push({ id: x.id, tree_order: x.tree_order + 1 });
                    });
                }
                if (updateData.length > 0) await conn.updateRows(this.tableName, updateData);

                await conn.commit();
                return { create: [insertData], update: updateData };
            } catch (error) {
                await conn.rollback();
                throw error;
            }
        }
        async save(data) {
            const filing = await this.getDataById(data.id);
            this._checkFixed(filing);

            const result = await this.db.update(this.tableName, data);
            if (result.affectedRows > 0) {
                return data;
            } else {
                throw '更新数据失败';
            }
        }
        async del(data) {
            const filing = await this.getDataById(data.id);
            this._checkFixed(filing);

            const posterity = await this.getPosterityData(data.id);
            const delData = posterity.map(x => {return { id: x.id, is_deleted: 1 }; });
            delData.push({ id: data.id, is_deleted: 1});

            const sibling = await this.getAllDataByCondition({ where: { tree_pid: filing.tree_pid } });
            const updateData = [];
            sibling.forEach(x => {
                if (x.tree_order > filing.tree_order) updateData.push({ id: x.id, tree_order: x.tree_order - 1});
            });
            const conn = await this.db.beginTransaction();
            try {
                await conn.updateRows(this.tableName, delData);
                if (updateData.length > 0) conn.updateRows(this.tableName, updateData);

                await conn.commit();
                return { delete: delData.map(x => { return x.id }), update: updateData };
            } catch(err) {
                await conn.rollback();
                throw err;
            }
        }
        async move(data) {
            const filing = await this.getDataById(data.id);
            if (!filing) throw '移动的分类不存在，请刷新页面后重试';
            const parent = await this.getDataById(data.tree_pid);
            if (!parent) throw '移动后的分类不存在，请刷新页面后重试';
            const sibling = await this.getAllDataByCondition({ where: { tree_pid: data.tree_pid, is_deleted: 0 } });
            const posterity = await this.getPosterityData(filing.id);
            const updateData = { id: filing.id, tree_order: data.tree_order, tree_pid: data.tree_pid, tree_level: parent.tree_level + 1 };
            const posterityUpdateData = posterity.map(x => {
               return { id: x.id,  tree_level: parent.tree_level + 1 - filing.tree_level + x.tree_level };
            });
            const siblingUpdateData = [];
            if (data.tree_pid === filing.tree_pid) {
                if (data.tree_order < filing.tree_order) {
                    sibling.forEach(x => {
                        if (x.id === filing.id) return;
                        if (x.tree_order < data.tree_order) return;
                        if (x.tree_order > filing.tree_order) return;
                        siblingUpdateData.push({id: x.id, tree_order: x.tree_order + 1});
                    });
                } else {
                    sibling.forEach(x => {
                        if (x.id === filing.id) return;
                        if (x.tree_order < filing.tree_order) return;
                        if (x.tree_order > data.tree_order) return;
                        siblingUpdateData.push({id: x.id, tree_order: x.tree_order - 1});
                    });
                }
            } else {
                const orgSibling = await this.getAllDataByCondition({ where: { tree_pid: filing.tree_pid, is_deleted: 0 } });
                orgSibling.forEach(x => {
                    if (x.id === filing.id) return;
                    if (x.tree_order < filing.tree_order) return;
                    siblingUpdateData.push({id: x.id, tree_order: x.tree_order - 1});
                });
                sibling.forEach(x => {
                    if (x.id === filing.id) return;
                    if (x.tree_order < data.tree_order) return;
                    siblingUpdateData.push({id: x.id, tree_order: x.tree_order + 1});
                })
            }

            const conn = await this.db.beginTransaction();
            try {
                await conn.update(this.tableName, updateData);
                if (posterityUpdateData.length > 0) await conn.updateRows(this.tableName, posterityUpdateData);
                if (siblingUpdateData.length > 0) await conn.updateRows(this.tableName, siblingUpdateData);
                await conn.commit();
            } catch (err) {
                await conn.rollback();
                throw err;
            }
            return { update: [updateData, ...posterityUpdateData, ...siblingUpdateData] };
        }

        async sumFileCount(spid) {
            const result = await this.db.queryOne(`SELECT SUM(file_count) AS file_count FROM ${this.tableName} WHERE spid = '${spid}' and is_deleted = 0`);
            return result.file_count;
        }
    }

    return Filing;
};