// SPDX-License-Identifier: MIT
pragma solidity ^0.8.8;

contract SimpleStorage {
    // boolean, uint, int, address, bytes
    address public myAddress = 0xc9445E993dAeA4bA3F1FE1080F0F6f8c46b4d967;
    uint256 public myNumber = 123; // With Getter, Retrieval Need Gas
    string myText = "Hello World";
    //int256 favoriteInt = -5;
    //bytes32 favoriteBytes = "cat";
    uint256 myDefaultZero; // Initialize default to 0

    // Paid
    function storeMyNumber(uint256 _favoriteNumber) public virtual {
        myNumber = _favoriteNumber;
        //retrieve();
    }

    /*
        view - for retrieve variable data (Free)
        pure - for calculation (Free)
        Free function will cost $ if call in Paid function
    */
    function viewMyNumber() public view returns (uint256) {
        return myNumber;
    }

    function pureCalculation() public pure returns (uint256) {
        return ((1 + 555) * 22) / 88;
    }

    // Custom People Object
    struct People {
        uint256 favoriteNumber;
        string name;
    }

    People public personJohn = People({favoriteNumber: 2, name: "John"});

    // Array Variable
    People[] public people;

    function addNewPerson2(
        string memory _name,
        uint256 _favoriteNumber
    ) public {
        //People memory newPerson = People(_favoriteNumber, _name);
        people.push(People(_favoriteNumber, _name));
        nameToFavoriteNumber[_name] = _favoriteNumber;
    }

    /*
    calldata - tmp data cannot modify
    memory - tmp dta can modify
    storage - permanent data can modify
    */

    // Mapping - Easy to find data (Like Java HashMap)
    mapping(string => uint256) public nameToFavoriteNumber;

    /*
    EVM, Ethereum Virtual Machine
    Avalanche, Fantom, Polygon
    */
}