// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import {Test} from "forge-std/Test.sol";
import {RailEscrowVault} from "@emoney/RailEscrowVault.sol";
import {IRailEscrowVault} from "@emoney/interfaces/IRailEscrowVault.sol";
import {RailTypes} from "@emoney/libraries/RailTypes.sol";
import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";

contract MockERC20 is ERC20 {
    constructor() ERC20("Mock Token", "MOCK") {
        _mint(msg.sender, 1000000 * 10**18);
    }

    function mint(address to, uint256 amount) external {
        _mint(to, amount);
    }
}

contract RailEscrowVaultTest is Test {
    RailEscrowVault public vault;
    MockERC20 public token;
    address public admin;
    address public settlementOperator;
    address public user;

    function setUp() public {
        admin = address(0x1);
        settlementOperator = address(0x2);
        user = address(0x10);

        vault = new RailEscrowVault(admin);
        token = new MockERC20();

        vm.startPrank(admin);
        vault.grantRole(vault.SETTLEMENT_OPERATOR_ROLE(), settlementOperator);
        vm.stopPrank();

        // Give user some tokens
        token.mint(user, 10000 * 10**18);
    }

    function test_lock() public {
        uint256 amount = 1000 * 10**18;
        uint256 triggerId = 1;

        vm.startPrank(user);
        token.approve(address(vault), amount);
        vm.stopPrank();

        vm.expectEmit(true, true, false, true);
        emit Locked(address(token), user, amount, triggerId, uint8(RailTypes.Rail.SWIFT));

        vm.prank(settlementOperator);
        vault.lock(address(token), user, amount, triggerId, RailTypes.Rail.SWIFT);

        assertEq(vault.getEscrowAmount(address(token), triggerId), amount);
        assertEq(vault.getTotalEscrow(address(token)), amount);
        assertEq(token.balanceOf(address(vault)), amount);
    }

    function test_release() public {
        uint256 amount = 1000 * 10**18;
        uint256 triggerId = 1;
        address recipient = address(0x20);

        vm.startPrank(user);
        token.approve(address(vault), amount);
        vm.stopPrank();

        vm.prank(settlementOperator);
        vault.lock(address(token), user, amount, triggerId, RailTypes.Rail.SWIFT);

        uint256 recipientBalanceBefore = token.balanceOf(recipient);

        vm.expectEmit(true, true, false, true);
        emit Released(address(token), recipient, amount, triggerId);

        vm.prank(settlementOperator);
        vault.release(address(token), recipient, amount, triggerId);

        assertEq(vault.getEscrowAmount(address(token), triggerId), 0);
        assertEq(vault.getTotalEscrow(address(token)), 0);
        assertEq(token.balanceOf(recipient), recipientBalanceBefore + amount);
    }

    function test_release_insufficientEscrow() public {
        uint256 amount = 1000 * 10**18;
        uint256 triggerId = 1;

        vm.startPrank(user);
        token.approve(address(vault), amount);
        vm.stopPrank();

        vm.prank(settlementOperator);
        vault.lock(address(token), user, amount, triggerId, RailTypes.Rail.SWIFT);

        vm.prank(settlementOperator);
        vm.expectRevert("RailEscrowVault: insufficient escrow");
        vault.release(address(token), address(0x20), amount + 1, triggerId);
    }
    
    // Helper events for testing (match IRailEscrowVault events)
    event Locked(address indexed token, address indexed account, uint256 amount, uint256 indexed triggerId, uint8 rail);
    event Released(address indexed token, address indexed recipient, uint256 amount, uint256 indexed triggerId);
}