import { expect } from "chai"
import { ethers } from "hardhat"
import { ControlledERC20 } from "../typechain-types"

describe("ControlledERC20", function () {
	let controlledERC20: ControlledERC20
	let owner: any
	let user1: any
	let user2: any
	let user3: any

	const MINTER_ROLE = ethers.keccak256(ethers.toUtf8Bytes("MINTER_ROLE"))
	const PAUSER_ROLE = ethers.keccak256(ethers.toUtf8Bytes("PAUSER_ROLE"))
	const TRANSFER_CONTROLLER_ROLE = ethers.keccak256(ethers.toUtf8Bytes("TRANSFER_CONTROLLER_ROLE"))

	beforeEach(async function () {
		;[owner, user1, user2, user3] = await ethers.getSigners()

		const ControlledERC20Factory = await ethers.getContractFactory("ControlledERC20")
		controlledERC20 = await ControlledERC20Factory.deploy("Controlled Token", "CTRL", owner.address)
	})

	describe("Deployment", function () {
		it("Should set the right owner with all roles", async function () {
			expect(await controlledERC20.hasRole(ethers.ZeroHash, owner.address)).to.be.true // DEFAULT_ADMIN_ROLE
			expect(await controlledERC20.hasRole(MINTER_ROLE, owner.address)).to.be.true
			expect(await controlledERC20.hasRole(PAUSER_ROLE, owner.address)).to.be.true
			expect(await controlledERC20.hasRole(TRANSFER_CONTROLLER_ROLE, owner.address)).to.be.true
		})

		it("Should have transfer enabled by default", async function () {
			expect(await controlledERC20.transferEnabled()).to.be.true
		})

		it("Should have owner in whitelist", async function () {
			expect(await controlledERC20.isWhitelisted(owner.address)).to.be.true
		})
	})

	describe("Role Management", function () {
		it("Should allow admin to grant minter role", async function () {
			await controlledERC20.connect(owner).grantRole(MINTER_ROLE, user1.address)
			expect(await controlledERC20.hasRole(MINTER_ROLE, user1.address)).to.be.true
		})

		it("Should allow admin to revoke minter role", async function () {
			await controlledERC20.connect(owner).grantRole(MINTER_ROLE, user1.address)
			await controlledERC20.connect(owner).revokeRole(MINTER_ROLE, user1.address)
			expect(await controlledERC20.hasRole(MINTER_ROLE, user1.address)).to.be.false
		})
	})

	describe("Minting", function () {
		it("Should allow minter to mint tokens", async function () {
			const mintAmount = ethers.parseEther("1000")
			await controlledERC20.connect(owner).mint(user1.address, mintAmount)
			expect(await controlledERC20.balanceOf(user1.address)).to.equal(mintAmount)
		})

		it("Should allow minter to batch mint tokens", async function () {
			const recipients = [user1.address, user2.address]
			const amounts = [ethers.parseEther("100"), ethers.parseEther("200")]

			await controlledERC20.connect(owner).mintBatch(recipients, amounts)

			expect(await controlledERC20.balanceOf(user1.address)).to.equal(amounts[0])
			expect(await controlledERC20.balanceOf(user2.address)).to.equal(amounts[1])
		})

		it("Should not allow non-minter to mint", async function () {
			const mintAmount = ethers.parseEther("1000")
			await expect(controlledERC20.connect(user1).mint(user2.address, mintAmount)).to.be.revertedWithCustomError(
				controlledERC20,
				"AccessControlUnauthorizedAccount"
			)
		})
	})

	describe("Transfer Control", function () {
		beforeEach(async function () {
			// Mint some tokens to users for testing
			await controlledERC20.connect(owner).mint(user1.address, ethers.parseEther("1000"))
			await controlledERC20.connect(owner).mint(user2.address, ethers.parseEther("1000"))
		})

		it("Should allow transfer when enabled", async function () {
			const transferAmount = ethers.parseEther("100")
			await controlledERC20.connect(user1).transfer(user3.address, transferAmount)
			expect(await controlledERC20.balanceOf(user3.address)).to.equal(transferAmount)
		})

		it("Should not allow transfer when disabled", async function () {
			await controlledERC20.connect(owner).setTransferEnabled(false)

			const transferAmount = ethers.parseEther("100")
			await expect(controlledERC20.connect(user1).transfer(user3.address, transferAmount)).to.be.revertedWith(
				"Transfer is disabled"
			)
		})

		it("Should allow whitelisted addresses to transfer when disabled", async function () {
			await controlledERC20.connect(owner).setTransferEnabled(false)
			await controlledERC20.connect(owner).updateWhitelist(user1.address, true)

			const transferAmount = ethers.parseEther("100")
			await controlledERC20.connect(user1).transfer(user3.address, transferAmount)
			expect(await controlledERC20.balanceOf(user3.address)).to.equal(transferAmount)
		})

		it("Should allow transfer to whitelisted addresses when disabled", async function () {
			await controlledERC20.connect(owner).setTransferEnabled(false)
			await controlledERC20.connect(owner).updateWhitelist(user3.address, true)

			const transferAmount = ethers.parseEther("100")
			await controlledERC20.connect(user1).transfer(user3.address, transferAmount)
			expect(await controlledERC20.balanceOf(user3.address)).to.equal(transferAmount)
		})
	})

	describe("Whitelist Management", function () {
		it("Should allow transfer controller to update whitelist", async function () {
			await controlledERC20.connect(owner).updateWhitelist(user1.address, true)
			expect(await controlledERC20.isWhitelisted(user1.address)).to.be.true
		})

		it("Should allow transfer controller to batch update whitelist", async function () {
			const accounts = [user1.address, user2.address]
			const isWhitelisted = [true, false]

			await controlledERC20.connect(owner).updateWhitelistBatch(accounts, isWhitelisted)

			expect(await controlledERC20.isWhitelisted(user1.address)).to.be.true
			expect(await controlledERC20.isWhitelisted(user2.address)).to.be.false
		})

		it("Should not allow non-transfer controller to update whitelist", async function () {
			await expect(
				controlledERC20.connect(user1).updateWhitelist(user2.address, true)
			).to.be.revertedWithCustomError(controlledERC20, "AccessControlUnauthorizedAccount")
		})
	})

	describe("Pause/Unpause", function () {
		it("Should allow pauser to pause", async function () {
			await controlledERC20.connect(owner).pause()
			expect(await controlledERC20.paused()).to.be.true
		})

		it("Should allow pauser to unpause", async function () {
			await controlledERC20.connect(owner).pause()
			await controlledERC20.connect(owner).unpause()
			expect(await controlledERC20.paused()).to.be.false
		})

		it("Should not allow non-pauser to pause", async function () {
			await expect(controlledERC20.connect(user1).pause()).to.be.revertedWithCustomError(
				controlledERC20,
				"AccessControlUnauthorizedAccount"
			)
		})
	})

	describe("Burn", function () {
		beforeEach(async function () {
			await controlledERC20.connect(owner).mint(user1.address, ethers.parseEther("1000"))
		})

		it("Should allow burning tokens", async function () {
			const burnAmount = ethers.parseEther("100")
			const initialBalance = await controlledERC20.balanceOf(user1.address)

			await controlledERC20.connect(user1).burn(burnAmount)

			expect(await controlledERC20.balanceOf(user1.address)).to.equal(initialBalance - burnAmount)
		})
	})
})