// SPDX-License-Identifier: MIT
pragma solidity >=0.8.19;

import { uMAX_SD59x18, uMIN_SD59x18, uUNIT } from "./Constants.sol";
import { PRBMath_SD59x18_Convert_Overflow, PRBMath_SD59x18_Convert_Underflow } from "./Errors.sol";
import { SD59x18 } from "./ValueType.sol";

/// @notice Converts a simple integer to SD59x18 by multiplying it by `UNIT`.
///
/// @dev Requirements:
/// - x must be greater than or equal to `MIN_SD59x18 / UNIT`.
/// - x must be less than or equal to `MAX_SD59x18 / UNIT`.
///
/// @param x The basic integer to convert.
/// @param result The same number converted to SD59x18.
function convert(int256 x) pure returns (SD59x18 result) {
    if (x < uMIN_SD59x18 / uUNIT) {
        revert PRBMath_SD59x18_Convert_Underflow(x);
    }
    if (x > uMAX_SD59x18 / uUNIT) {
        revert PRBMath_SD59x18_Convert_Overflow(x);
    }
    unchecked {
        result = SD59x18.wrap(x * uUNIT);
    }
}

/// @notice Converts an SD59x18 number to a simple integer by dividing it by `UNIT`.
/// @dev The result is rounded toward zero.
/// @param x The SD59x18 number to convert.
/// @return result The same number as a simple integer.
function convert(SD59x18 x) pure returns (int256 result) {
    result = SD59x18.unwrap(x) / uUNIT;
}