import type { ApiResponse } from "../client/types";
import proto from "db://assets/Scripts/proto/proto.pb.js";
import type { IShopService } from "./IShopService";

export class MockShopService implements IShopService {
  private delay(ms = 180) { return new Promise<void>(r => setTimeout(r, ms)); }
  private randInt(min: number, max: number) { return Math.floor(Math.random() * (max - min + 1)) + min; }
  private priceUSD(min = 0.99, max = 49.99) {
    const v = Math.random() * (max - min) + min;
    return v.toFixed(2); // 字符串，保留两位小数
  }

  private ok<T>(data: T): ApiResponse<T> {
    return ({ ok: true, data } as unknown) as ApiResponse<T>;
  }

  private genGood(id: number, vip = false): proto.cs.IGood {
    return {
      id,
      name: vip ? `VIP-${id}` : `Diamond Pack ${id}`,
      desc: vip ? `VIP access for ${this.randInt(24, 168)} hours` : `Diamonds x${this.randInt(60, 2000)}`,
      price: this.priceUSD(vip ? 4.99 : 0.99, vip ? 49.99 : 29.99),
      count: vip ? this.randInt(24, 168) : this.randInt(60, 2000), // VIP=小时，普通=数量
    };
  }

  // 获取商品列表
  async reqShopList(_req: proto.cs.ICSGetShopReq): Promise<ApiResponse<proto.cs.ICSGetShopRes>> {
    await this.delay();

    // 普通商品（<=2000）+ VIP 商品（>2000）
    const normals: proto.cs.IGood[] = Array.from({ length: 5 }, (_, i) => this.genGood(1000 + i, false));
    const vips: proto.cs.IGood[]     = Array.from({ length: 3 }, (_, i) => this.genGood(2001 + i, true));

    // 注意：你的 proto 定义中字段名为 "Goods"（大写 G）
    const res: proto.cs.ICSGetShopRes = { Goods: [...normals, ...vips] };
    return this.ok(res);
  }
}