'use strict';

/**
 * 期 - 变更数据
 *
 * @author Mai
 * @date
 * @version
 */

const defaultPid = -1; // 非pid

module.exports = app => {

    class StageChange extends app.BaseService {

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

        /**
         * 查询 调用的变更令
         * @param {Number} tid - 标段id
         * @param {Number} sid - 期id
         * @param {Number} lid - 台账节点id
         * @param {Number} pid - 部位明细id
         * @returns {Promise<*>}
         */
        async getLastestStageData(tid, sid, lid, pid) {
            const sql = 'SELECT c.* FROM ' + this.tableName + ' As c ' +
                '  INNER JOIN ( ' +
                '    SELECT MAX(`stimes`) As `stimes`, MAX(`sorder`) As `sorder`, `lid`, `pid` From ' + this.tableName +
                '      WHERE tid = ? And sid = ? And lid = ? And pid = ?' +
                '  ) As m ' +
                '  ON c.stimes = m.stimes And c.sorder = m.sorder And c.lid = m.lid And c.pid = m.pid';
            const sqlParam = [tid, sid, lid, pid ? pid : -1];
            return await this.db.query(sql, sqlParam);
        }

        /**
         * 调用变更令
         * @param {Object} target - 台账|部位
         * @param {Array} changes - 调用的变更令
         * @returns {Promise<void>}
         */
        async billsChange(bills, changes) {
            const self = this;
            function getNewChange(cid, cbid, times, order, qty) {
                return {
                    tid: self.ctx.tender.id,
                    sid: self.ctx.stage.id,
                    lid: bills.id,
                    pid: -1,
                    cid: cid,
                    cbid: cbid,
                    stimes: times,
                    sorder: order,
                    qty: qty
                }
            }
            const ledgerBills = await this.ctx.service.ledger.getDataById(bills.id);
            if (!ledgerBills || ledgerBills.tender_id !== this.ctx.tender.id) {
                throw '提交数据错误';
            }
            const precision = this.ctx.helper.findPrecision(this.ctx.tender.info.precision, ledgerBills.unit);
            // 获取原变更令
            const oldChanges = await this.getLastestStageData(this.ctx.tender.id, this.ctx.stage.id, bills.id, -1);
            const order = this.ctx.stage.curAuditor ? this.ctx.stage.curAuditor.order : 0;
            // 获取更新数据
            const updateChanges = [], newChanges = [];
            let billsQty = 0;
            for (const oc of oldChanges) {
                const nc = this._.find(changes, {cid: oc.cid, cbid: oc.cbid});
                if (!nc || nc.qty !== oc.qty) {
                    const qty = nc ? this.round(nc.qty, precision.value) : null;
                    const change = getNewChange(oc.cid, oc.cbid, this.ctx.stage.times, order, qty);
                    billsQty = this.ctx.helper.plus(billsQty, change.qty);
                    if (oc.stimes === this.ctx.stage.times && oc.sorder === order) {
                        change.id = oc.id;
                        updateChanges.push(change);
                    } else {
                        newChanges.push(change);
                    }
                } else {
                    billsQty = this.ctx.helper.plus(billsQty, oc.qty);
                }
            }
            for (const c of changes) {
                const nc = this._.find(oldChanges, {cid: c.cid, cbid: c.cbid});
                if (!nc) {
                    const change = getNewChange(c.cid, c.cbid, this.ctx.stage.times, order, this.round(c.qty, precision.value));
                    billsQty = this.ctx.helper.plus(billsQty, change.qty);
                    newChanges.push(change);
                }
            }
            // 更新数据
            const transaction = await this.db.beginTransaction();
            try {
                if (newChanges.length > 0) {
                    await transaction.insert(this.tableName, newChanges);
                }
                for (const c of updateChanges) {
                    await transaction.update(this.tableName, c);
                }
                const stageBills = await this.ctx.service.stageBills.getLastestStageData(this.ctx.tender.id, this.ctx.stage.id, bills.id);
                await this.ctx.service.stageBills.updateStageBillsQty(transaction, ledgerBills, stageBills, { qc_qty: billsQty });
                await transaction.commit();
            } catch (err) {
                await transaction.rollback();
                throw err;
            }
            const result = await this.ctx.service.stageBills.getLastestStageData(this.ctx.tender.id, this.ctx.stage.id, [bills.id]);
            return { bills: result };
        }

        async posChange(pos, changes) {
            const self = this;
            function getNewChange(cid, cbid, times, order, qty) {
                return {
                    tid: self.ctx.tender.id,
                    sid: self.ctx.stage.id,
                    lid: pos.lid,
                    pid: pos.id,
                    cid: cid,
                    cbid: cbid,
                    stimes: times,
                    sorder: order,
                    qty: qty
                }
            }
            const ledgerBills = await this.ctx.service.ledger.getDataById(pos.lid);
            if (!ledgerBills || ledgerBills.tender_id !== this.ctx.tender.id) {
                throw '提交数据错误';
            }
            const precision = this.ctx.helper.findPrecision(this.ctx.tender.info.precision, ledgerBills.unit);
            // 获取原变更令
            const oldChanges = await this.getLastestStageData(this.ctx.tender.id, this.ctx.stage.id, pos.lid, pos.id);
            const updateChanges = [], newChanges = [];
            let posQty = 0;
            for (const oc of oldChanges) {
                const nc = this._.find(changes, {cid: oc.cid, cbid: oc.cbid});
                if (!nc || nc.qty !== oc.qty) {
                    const qty = nc ? this.round(nc.qty, precision.value) : null;
                    const change = getNewChange(oc.cid, oc.cbid, this.ctx.stage.times, this.ctx.stage.flowOrder, qty);
                    posQty = this.ctx.helper.plus(posQty, change.qty);
                    if (oc.stimes === this.ctx.stage.times && oc.sorder === this.ctx.stage.flowOrder) {
                        change.id = oc.id;
                        updateChanges.push(change);
                    } else {
                        newChanges.push(change);
                    }
                } else {
                    posQty = this.ctx.helper.plus(posQty, oc.qty);
                }
            }
            for (const c of changes) {
                const nc = this._.find(oldChanges, {cid: c.cid, cbid: c.cbid});
                if (!nc) {
                    const change = getNewChange(c.cid, c.cbid, this.ctx.stage.times, this.ctx.stage.flowOrder, this.round(c.qty, precision.value));
                    posQty = this.ctx.helper.plus(posQty, change.qty);
                    newChanges.push(change);
                }
            }
            // 更新数据
            const transaction = await this.db.beginTransaction();
            try {
                if (newChanges.length > 0) {
                    await transaction.insert(this.tableName, newChanges);
                }
                for (const c of updateChanges) {
                    await transaction.update(this.tableName, c);
                }
                await this.ctx.service.stagePos.updateChangeQuantity(transaction, pos, posQty);
                await transaction.commit();
            } catch (err) {
                await transaction.rollback();
                throw err;
            }

            // 获取返回数据
            try {
                const data = {};
                data.bills = await this.ctx.service.stageBills.getLastestStageData(this.ctx.tender.id, this.ctx.stage.id, [pos.lid]);
                data.pos = await this.ctx.service.stagePos.getLastestStageData(this.ctx.tender.id, this.ctx.stage.id, [pos.id])
                return data;
            } catch(err) {
                throw '获取数据错误，请刷新页面';
            }
        }

    }

    return StageChange;

};