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

import "forge-std/Test.sol";
import "../../src/eMoneyToken.sol";
import "../../src/PolicyManager.sol";
import "../../src/ComplianceRegistry.sol";
import "../../src/DebtRegistry.sol";
import "../../src/errors/TokenErrors.sol";
import "../../src/libraries/ReasonCodes.sol";
import "@openzeppelin/contracts/proxy/ERC1967/ERC1967Proxy.sol";

contract eMoneyTokenTest is Test {
    eMoneyToken public token;
    PolicyManager public policyManager;
    ComplianceRegistry public complianceRegistry;
    DebtRegistry public debtRegistry;

    address public admin;
    address public issuer;
    address public enforcement;
    address public user1;
    address public user2;

    function setUp() public {
        admin = address(0x1);
        issuer = address(0x2);
        enforcement = address(0x3);
        user1 = address(0x10);
        user2 = address(0x20);

        complianceRegistry = new ComplianceRegistry(admin);
        debtRegistry = new DebtRegistry(admin);
        policyManager = new PolicyManager(admin, address(complianceRegistry), address(debtRegistry));

        // Deploy implementation
        eMoneyToken implementation = new eMoneyToken();

        // Deploy proxy
        bytes memory initData = abi.encodeWithSelector(
            eMoneyToken.initialize.selector,
            "Test Token",
            "TEST",
            18,
            issuer,
            address(policyManager),
            address(debtRegistry),
            address(complianceRegistry)
        );

        ERC1967Proxy proxy = new ERC1967Proxy(address(implementation), initData);
        token = eMoneyToken(address(proxy));

        // Set up roles
        vm.startPrank(issuer);
        token.grantRole(token.ENFORCEMENT_ROLE(), enforcement);
        vm.stopPrank();

        // Set up compliance
        vm.startPrank(admin);
        complianceRegistry.grantRole(complianceRegistry.COMPLIANCE_ROLE(), admin);
        complianceRegistry.setCompliance(user1, true, 1, bytes32(0));
        complianceRegistry.setCompliance(user2, true, 1, bytes32(0));
        complianceRegistry.setCompliance(issuer, true, 1, bytes32(0));
        policyManager.grantRole(policyManager.POLICY_OPERATOR_ROLE(), admin);
        policyManager.setLienMode(address(token), 2);
        vm.stopPrank();
    }

    function test_mint() public {
        bytes32 reasonCode = ReasonCodes.OK;

        vm.prank(issuer);
        token.mint(user1, 1000, reasonCode);

        assertEq(token.balanceOf(user1), 1000);
    }

    function test_mint_unauthorized() public {
        vm.expectRevert();
        token.mint(user1, 1000, bytes32(0));
    }

    function test_burn() public {
        vm.prank(issuer);
        token.mint(user1, 1000, bytes32(0));

        vm.prank(issuer);
        token.burn(user1, 500, ReasonCodes.OK);

        assertEq(token.balanceOf(user1), 500);
    }

    function test_transfer_normal() public {
        vm.prank(issuer);
        token.mint(user1, 1000, bytes32(0));

        vm.prank(user1);
        token.transfer(user2, 500);

        assertEq(token.balanceOf(user1), 500);
        assertEq(token.balanceOf(user2), 500);
    }

    function test_transfer_paused() public {
        vm.prank(issuer);
        token.mint(user1, 1000, bytes32(0));

        vm.prank(admin);
        policyManager.setPaused(address(token), true);

        vm.expectRevert(
            abi.encodeWithSelector(TransferBlocked.selector, ReasonCodes.PAUSED, user1, user2, 500)
        );
        vm.prank(user1);
        token.transfer(user2, 500);
    }

    function test_transfer_hardFreezeMode() public {
        vm.startPrank(admin);
        policyManager.setLienMode(address(token), 1); // Hard freeze
        debtRegistry.grantRole(debtRegistry.DEBT_AUTHORITY_ROLE(), admin);
        debtRegistry.placeLien(user1, 100, 0, 1, ReasonCodes.LIEN_BLOCK);
        vm.stopPrank();

        vm.prank(issuer);
        token.mint(user1, 1000, bytes32(0));

        vm.expectRevert(
            abi.encodeWithSelector(TransferBlocked.selector, ReasonCodes.LIEN_BLOCK, user1, user2, 1)
        );
        vm.prank(user1);
        token.transfer(user2, 1);
    }

    function test_transfer_encumberedMode() public {
        vm.startPrank(admin);
        debtRegistry.grantRole(debtRegistry.DEBT_AUTHORITY_ROLE(), admin);
        debtRegistry.placeLien(user1, 300, 0, 1, ReasonCodes.LIEN_BLOCK);
        vm.stopPrank();

        vm.prank(issuer);
        token.mint(user1, 1000, bytes32(0));

        // freeBalance = 1000 - 300 = 700
        assertEq(token.freeBalanceOf(user1), 700);

        // Transfer 700 should succeed
        vm.prank(user1);
        token.transfer(user2, 700);

        assertEq(token.balanceOf(user1), 300);
        assertEq(token.balanceOf(user2), 700);

        // Transfer 1 more should fail
        vm.expectRevert(
            abi.encodeWithSelector(TransferBlocked.selector, ReasonCodes.INSUFF_FREE_BAL, user1, user2, 1)
        );
        vm.prank(user1);
        token.transfer(user2, 1);
    }

    function test_freeBalanceOf() public {
        vm.prank(issuer);
        token.mint(user1, 1000, bytes32(0));

        assertEq(token.freeBalanceOf(user1), 1000);

        vm.startPrank(admin);
        debtRegistry.grantRole(debtRegistry.DEBT_AUTHORITY_ROLE(), admin);
        debtRegistry.placeLien(user1, 300, 0, 1, ReasonCodes.LIEN_BLOCK);
        vm.stopPrank();

        assertEq(token.freeBalanceOf(user1), 700);
    }

    function test_clawback() public {
        vm.prank(issuer);
        token.mint(user1, 1000, bytes32(0));

        vm.startPrank(admin);
        debtRegistry.grantRole(debtRegistry.DEBT_AUTHORITY_ROLE(), admin);
        debtRegistry.placeLien(user1, 500, 0, 1, ReasonCodes.LIEN_BLOCK);
        vm.stopPrank();

        // Clawback should bypass liens
        vm.prank(enforcement);
        token.clawback(user1, user2, 600, ReasonCodes.UNAUTHORIZED);

        assertEq(token.balanceOf(user1), 400);
        assertEq(token.balanceOf(user2), 600);
    }

    function test_forceTransfer() public {
        vm.prank(issuer);
        token.mint(user1, 1000, bytes32(0));

        vm.startPrank(admin);
        debtRegistry.grantRole(debtRegistry.DEBT_AUTHORITY_ROLE(), admin);
        debtRegistry.placeLien(user1, 500, 0, 1, ReasonCodes.LIEN_BLOCK);
        vm.stopPrank();

        // ForceTransfer bypasses liens but checks compliance
        vm.prank(enforcement);
        token.forceTransfer(user1, user2, 600, ReasonCodes.UNAUTHORIZED);

        assertEq(token.balanceOf(user1), 400);
        assertEq(token.balanceOf(user2), 600);
    }

    function test_forceTransfer_nonCompliant() public {
        address nonCompliant = address(0x99);

        vm.prank(issuer);
        token.mint(user1, 1000, bytes32(0));

        vm.prank(enforcement);
        vm.expectRevert("eMoneyToken: to not compliant");
        token.forceTransfer(user1, nonCompliant, 100, bytes32(0));
    }
}