import { test, expect, describe } from "vitest";
import { getValueOfRule, InputOptions } from "../src/input-rule";

describe("getValueOfRule - 文本模式 (text: true)", () => {
  const textOpts: InputOptions = { text: true };

  test("普通文本直接返回", () => {
    expect(getValueOfRule("hello", { ...textOpts })).toBe("hello");
  });

  test("null 值返回空字符串", () => {
    expect(getValueOfRule(null, { ...textOpts })).toBe("");
  });

  test("required + init：非数字文本回退到 init", () => {
    expect(getValueOfRule("abc", { ...textOpts, required: true, init: "默认" })).toBe("默认");
  });

  test("required 无 init：非数字文本保持原值", () => {
    expect(getValueOfRule("abc", { ...textOpts, required: true })).toBe("abc");
  });

  test("number 选项将结果转为数字", () => {
    expect(getValueOfRule("123", { ...textOpts, number: true })).toBe(123);
  });

  test("pattern 匹配失败返回空字符串", () => {
    expect(getValueOfRule("abc", { ...textOpts, pattern: "^\\d+$" })).toBe("");
  });

  test("pattern 匹配成功返回原值", () => {
    expect(getValueOfRule("123", { ...textOpts, pattern: "^\\d+$" })).toBe("123");
  });
});

describe("getValueOfRule - 数字模式", () => {
  test("正常数字字符串返回字符串", () => {
    expect(getValueOfRule("42", {})).toBe("42");
  });

  test("number 选项返回数字类型", () => {
    expect(getValueOfRule("42", { number: true })).toBe(42);
  });

  test("非法输入 + required 回退到 init", () => {
    expect(getValueOfRule("abc", { required: true, init: 10 })).toBe("10");
  });

  test("非法输入 + required 无 init 回退到 min", () => {
    expect(getValueOfRule("abc", { required: true, min: 5 })).toBe("5");
  });

  test("非法输入 + required 无 init 无 min 回退到 0", () => {
    expect(getValueOfRule("abc", { required: true })).toBe("0");
  });

  test("非法输入 + 非 required 返回空字符串", () => {
    expect(getValueOfRule("abc", {})).toBe("");
  });

  test("null 值 + required 回退到 init", () => {
    expect(getValueOfRule(null, { required: true, init: 0 })).toBe("0");
  });

  test("null 值 + 非 required 返回空字符串", () => {
    expect(getValueOfRule(null, {})).toBe("");
  });
});

describe("getValueOfRule - min/max 限制", () => {
  test("值小于 min 时限制为 min", () => {
    expect(getValueOfRule("3", { min: 5 })).toBe("5");
  });

  test("值大于 max 时限制为 max", () => {
    expect(getValueOfRule("100", { max: 50 })).toBe("50");
  });

  test("值在 min/max 范围内保持不变", () => {
    expect(getValueOfRule("25", { min: 0, max: 50 })).toBe("25");
  });

  test("负数受 min 限制", () => {
    expect(getValueOfRule("-10", { min: 0 })).toBe("0");
  });
});

describe("getValueOfRule - digits 小数位数", () => {
  test("保留 2 位小数（四舍五入）", () => {
    expect(getValueOfRule("3.456", { digits: 2 })).toBe("3.46");
  });

  test("保留 0 位小数", () => {
    expect(getValueOfRule("3.6", { digits: 0 })).toBe("4");
  });

  test("floor 向下取整小数", () => {
    expect(getValueOfRule("3.456", { digits: 2, floor: true })).toBe("3.45");
  });

  test("ceil 向上取整小数", () => {
    expect(getValueOfRule("3.451", { digits: 2, ceil: true })).toBe("3.46");
  });

  test("keepDecimal 保留尾部零", () => {
    expect(getValueOfRule("3", { digits: 2, keepDecimal: true })).toBe("3.00");
  });

  test("keepDecimal + number 返回数字类型", () => {
    expect(getValueOfRule("3.10", { digits: 2, keepDecimal: true, number: true })).toBe(3.1);
  });
});

describe("getValueOfRule - integer 整数模式", () => {
  test("integer 四舍五入取整", () => {
    expect(getValueOfRule("3.6", { integer: true })).toBe("4");
  });

  test("integer + floor 向下取整", () => {
    expect(getValueOfRule("3.9", { integer: true, floor: true })).toBe("3");
  });

  test("integer + ceil 向上取整", () => {
    expect(getValueOfRule("3.1", { integer: true, ceil: true })).toBe("4");
  });
});

describe("getValueOfRule - noSign 不允许正负号", () => {
  test("带正号的输入被视为非法", () => {
    expect(getValueOfRule("+5", { noSign: true, required: true, init: 0 })).toBe("0");
  });

  test("带负号的输入被视为非法", () => {
    expect(getValueOfRule("-5", { noSign: true, required: true, init: 0 })).toBe("0");
  });

  test("无符号数字正常通过", () => {
    expect(getValueOfRule("5", { noSign: true })).toBe("5");
  });
});

describe("getValueOfRule - callback", () => {
  test("callback 接收最终处理后的值", () => {
    let received: unknown;
    getValueOfRule("42", { number: true }, (v) => { received = v; });
    expect(received).toBe(42);
  });
});

describe("getValueOfRule - 综合场景", () => {
  test("限制输入 min:0, max:99999.99, required, digits:2", () => {
    expect(getValueOfRule("100.456", { min: 0, max: 99999.99, required: true, digits: 2 })).toBe("100.46");
  });

  test("超出 max 时截断到 max", () => {
    expect(getValueOfRule("100000", { min: 0, max: 99999.99, required: true, digits: 2 })).toBe("99999.99");
  });

  test("空输入 required 回退到 min", () => {
    expect(getValueOfRule("", { min: 0, max: 99999.99, required: true, digits: 2 })).toBe("0");
  });

  test("负数输入限制到 min:0", () => {
    expect(getValueOfRule("-5", { min: 0, max: 100, required: true })).toBe("0");
  });
});