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// SPDX-License-Identifier: Unlicensed

// Deployed with the Atlas IDE
// https://app.atlaszk.com

pragma solidity ^0.8.19;

contract VotingSystem {
    struct Candidate {
        uint id;
        string name;
        uint voteCount;
    }

    mapping(uint => Candidate) public candidates;
    mapping(address => bool) public voters;
    uint public candidatesCount;

    event votedEvent (
        uint indexed _candidateId
    );

    constructor() {
        addCandidate("Candidate 1");
        addCandidate("Candidate 2");
    }

    function addCandidate (string memory _name) private {
        candidatesCount ++;
        candidates[candidatesCount] = Candidate(candidatesCount, _name, 0);
    }

    function vote (uint _candidateId) public {
        require(!voters[msg.sender], "You have already voted.");
        require(_candidateId > 0 && _candidateId <= candidatesCount, "Invalid candidate.");

        voters[msg.sender] = true;
        candidates[_candidateId].voteCount ++;

        emit votedEvent(_candidateId);
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "libraries": {},
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

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[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"_candidateId","type":"uint256"}],"name":"votedEvent","type":"event"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"candidates","outputs":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"string","name":"name","type":"string"},{"internalType":"uint256","name":"voteCount","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"candidatesCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_candidateId","type":"uint256"}],"name":"vote","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"voters","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"}]

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