257 lines
7.8 KiB
TypeScript
257 lines
7.8 KiB
TypeScript
import { Injectable, Logger } from '@nestjs/common';
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import { PrismaService } from '../infrastructure/persistence/prisma/prisma.service';
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/** 基础价常量 */
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const BASE_PRICE = 15831; // 正式认种基础价（不变）
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const BASE_PORTION_PRICE = 1887; // 预种基础价 [2026-03-01 调整] 9项 floor(18870/10) 取整 + 总部吸收余额
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const PORTIONS_PER_TREE = 10; // [2026-03-01 调整] 5 → 10 份/棵
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export interface TreePricingConfigResponse {
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basePrice: number;
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basePortionPrice: number;
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currentSupplement: number;
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totalPrice: number;
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totalPortionPrice: number;
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autoIncreaseEnabled: boolean;
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autoIncreaseAmount: number;
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autoIncreaseIntervalDays: number;
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lastAutoIncreaseAt: Date | null;
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nextAutoIncreaseAt: Date | null;
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updatedAt: Date;
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}
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export interface TreePriceChangeLogItem {
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id: string;
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changeType: string;
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previousSupplement: number;
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newSupplement: number;
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changeAmount: number;
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reason: string | null;
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operatorId: string | null;
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createdAt: Date;
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}
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@Injectable()
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export class TreePricingService {
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private readonly logger = new Logger(TreePricingService.name);
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constructor(private readonly prisma: PrismaService) {}
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/**
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* 获取当前定价配置，不存在则创建默认配置
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*/
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async getConfig(): Promise<TreePricingConfigResponse> {
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let config = await this.prisma.treePricingConfig.findFirst({
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orderBy: { updatedAt: 'desc' },
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});
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if (!config) {
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config = await this.prisma.treePricingConfig.create({
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data: { currentSupplement: 0, autoIncreaseEnabled: false },
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});
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this.logger.log('[TREE-PRICING] Default config created');
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}
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const totalPrice = BASE_PRICE + config.currentSupplement;
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// 预种价格 = 基础预种价(1887) + floor(加价部分/10)
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const totalPortionPrice = BASE_PORTION_PRICE + Math.floor(config.currentSupplement / PORTIONS_PER_TREE);
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return {
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basePrice: BASE_PRICE,
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basePortionPrice: BASE_PORTION_PRICE,
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currentSupplement: config.currentSupplement,
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totalPrice,
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totalPortionPrice,
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autoIncreaseEnabled: config.autoIncreaseEnabled,
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autoIncreaseAmount: config.autoIncreaseAmount,
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autoIncreaseIntervalDays: config.autoIncreaseIntervalDays,
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lastAutoIncreaseAt: config.lastAutoIncreaseAt,
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nextAutoIncreaseAt: config.nextAutoIncreaseAt,
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updatedAt: config.updatedAt,
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};
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}
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/**
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* 手动修改加价金额（事务：同时更新配置 + 写入审计日志）
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* 涨价原因：总部运营成本压力
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*/
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async updateSupplement(
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newSupplement: number,
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reason: string,
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operatorId: string,
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): Promise<TreePricingConfigResponse> {
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// 允许负数（降价对冲），但总价不能低于 0
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if (BASE_PRICE + newSupplement < 0) {
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throw new Error(`调价金额不能低于 -${BASE_PRICE}，否则总价为负`);
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}
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const config = await this.getOrCreateConfig();
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const previousSupplement = config.currentSupplement;
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const changeAmount = newSupplement - previousSupplement;
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if (changeAmount === 0) {
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return this.getConfig();
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}
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await this.prisma.$transaction([
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this.prisma.treePricingConfig.update({
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where: { id: config.id },
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data: {
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currentSupplement: newSupplement,
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updatedBy: operatorId,
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},
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}),
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this.prisma.treePriceChangeLog.create({
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data: {
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changeType: 'MANUAL',
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previousSupplement,
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newSupplement,
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changeAmount,
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reason: reason || '总部运营成本压力调价',
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operatorId,
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},
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}),
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]);
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this.logger.log(
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`[TREE-PRICING] Manual supplement update: ${previousSupplement} → ${newSupplement} (${changeAmount > 0 ? '+' : ''}${changeAmount}) by ${operatorId}, reason: ${reason}`,
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);
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return this.getConfig();
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}
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/**
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* 更新自动涨价设置
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*/
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async updateAutoIncreaseSettings(
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enabled: boolean,
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amount?: number,
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intervalDays?: number,
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operatorId?: string,
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): Promise<TreePricingConfigResponse> {
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const config = await this.getOrCreateConfig();
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const data: Record<string, unknown> = {
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autoIncreaseEnabled: enabled,
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updatedBy: operatorId || null,
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};
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if (amount !== undefined) {
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if (amount < 0) throw new Error('自动涨价金额不能为负数');
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data.autoIncreaseAmount = amount;
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}
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if (intervalDays !== undefined) {
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if (intervalDays < 1) throw new Error('自动涨价间隔天数不能小于1');
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data.autoIncreaseIntervalDays = intervalDays;
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}
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// 启用时计算下次涨价时间
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if (enabled) {
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const interval = intervalDays ?? config.autoIncreaseIntervalDays;
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if (interval > 0) {
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const nextDate = new Date();
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nextDate.setDate(nextDate.getDate() + interval);
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data.nextAutoIncreaseAt = nextDate;
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}
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} else {
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data.nextAutoIncreaseAt = null;
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}
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await this.prisma.treePricingConfig.update({
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where: { id: config.id },
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data,
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});
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this.logger.log(
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`[TREE-PRICING] Auto-increase settings updated: enabled=${enabled}, amount=${amount ?? config.autoIncreaseAmount}, intervalDays=${intervalDays ?? config.autoIncreaseIntervalDays} by ${operatorId || 'unknown'}`,
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);
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return this.getConfig();
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}
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/**
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* 获取变更审计日志（分页）
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*/
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async getChangeLog(
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page: number = 1,
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pageSize: number = 20,
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): Promise<{ items: TreePriceChangeLogItem[]; total: number }> {
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const [items, total] = await this.prisma.$transaction([
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this.prisma.treePriceChangeLog.findMany({
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orderBy: { createdAt: 'desc' },
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skip: (page - 1) * pageSize,
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take: pageSize,
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}),
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this.prisma.treePriceChangeLog.count(),
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]);
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return { items, total };
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}
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/**
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* 执行自动涨价（由定时任务调用）
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* 涨价原因：系统自动涨价（总部运营成本压力）
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* @returns true 如果执行了涨价，false 如果未到时间或未启用
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*/
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async executeAutoIncrease(): Promise<boolean> {
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const config = await this.prisma.treePricingConfig.findFirst({
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orderBy: { updatedAt: 'desc' },
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});
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if (!config) return false;
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if (!config.autoIncreaseEnabled) return false;
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if (!config.nextAutoIncreaseAt) return false;
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if (config.autoIncreaseAmount <= 0) return false;
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const now = new Date();
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if (now < config.nextAutoIncreaseAt) return false;
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const previousSupplement = config.currentSupplement;
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const newSupplement = previousSupplement + config.autoIncreaseAmount;
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const nextDate = new Date(now);
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nextDate.setDate(nextDate.getDate() + config.autoIncreaseIntervalDays);
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await this.prisma.$transaction([
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this.prisma.treePricingConfig.update({
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where: { id: config.id },
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data: {
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currentSupplement: newSupplement,
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lastAutoIncreaseAt: now,
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nextAutoIncreaseAt: nextDate,
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},
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}),
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this.prisma.treePriceChangeLog.create({
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data: {
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changeType: 'AUTO',
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previousSupplement,
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newSupplement,
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changeAmount: config.autoIncreaseAmount,
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reason: '系统自动涨价（总部运营成本压力）',
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operatorId: 'SYSTEM',
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},
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}),
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]);
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this.logger.log(
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`[TREE-PRICING] Auto-increase executed: ${previousSupplement} → ${newSupplement} (+${config.autoIncreaseAmount}), next: ${nextDate.toISOString()}`,
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);
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return true;
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}
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/** 获取或创建配置（内部方法） */
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private async getOrCreateConfig() {
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let config = await this.prisma.treePricingConfig.findFirst({
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orderBy: { updatedAt: 'desc' },
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});
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if (!config) {
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config = await this.prisma.treePricingConfig.create({
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data: { currentSupplement: 0, autoIncreaseEnabled: false },
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});
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}
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return config;
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}
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}
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