import { describe, it, expect } from "vitest";
import { evaluatePositionDeltaLimit } from "../../../src/guards/positionDeltaLimit.js";
import { Guard } from "../../../src/strategy.schema.js";

describe("Position Delta Limit Guard", () => {
  it("should pass when position delta is within limit", () => {
    const guard: Guard = {
      type: "positionDeltaLimit",
      params: {
        maxDelta: "1000000",
        token: "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
      },
    };

    const context = {
      positionDelta: 500000n,
    };

    const result = evaluatePositionDeltaLimit(guard, "mainnet", context);
    expect(result.passed).toBe(true);
  });

  it("should fail when position delta exceeds limit", () => {
    const guard: Guard = {
      type: "positionDeltaLimit",
      params: {
        maxDelta: "1000000",
        token: "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
      },
    };

    const context = {
      positionDelta: 2000000n,
    };

    const result = evaluatePositionDeltaLimit(guard, "mainnet", context);
    expect(result.passed).toBe(false);
    expect(result.reason).toContain("exceeds");
  });

  it("should handle missing position delta", () => {
    const guard: Guard = {
      type: "positionDeltaLimit",
      params: {
        maxDelta: "1000000",
        token: "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
      },
    };

    const context = {};

    const result = evaluatePositionDeltaLimit(guard, "mainnet", context);
    // Should pass if no delta to check
    expect(result.passed).toBe(true);
  });
});