const { expect } = require("chai");
const URI = "ipfs://QmTXCPCpdruEQ5HspoTQq6C4uJhP4V66PE89Ja7y8CEJCw";
const URI2 = "ipfs://QmTXCPwpdruEQ5HBpoTQq6C4uJhP4V66PE89Ja7y8CEJC2"

describe("YourAppNft", function () {
  async function deploy() {   
    const [owner, otherAccount] = await ethers.getSigners();

    const YourAppNft = await ethers.getContractFactory("YourAppNft");
    const appNft = await YourAppNft.deploy(URI);
    await appNft.deployed();
    return appNft;
  }

  describe("Deployment", function () {
    it("Deploy contract and mint", async function () {
      const appNft = await deploy();
      const uri = await appNft.tokenURI(1)
      expect(uri).to.equal(URI);
    });

    it("The version number", async function () {
      const appNft = await deploy();
      const versions = await appNft.versions()
      expect(versions).to.equal(1);
    })

    it("Return correct URI", async function() {
      const appNft = await deploy();
      const buildURI = await appNft.getPreviousBuild(1);
      expect(buildURI).to.equal(URI);
    })

    it("Prohibit the production of new tokens", async function() {
      const appNft = await deploy();
      let err;
      try {
        await appNft.mint(URI);
      } catch (error) {
        err = error.message;
      }

      expect(err).to.equal("appNft.mint is not a function");      
    })
  });

  describe("Versions", function () {
      it("Allow to update versions", async function () {
        const appNft = await deploy();
        const uri = await appNft.tokenURI(1)
        expect(uri).to.equal(URI);
        await appNft.updateApp(URI2);
        const uri2 = await appNft.tokenURI(1)
        expect(uri2).to.equal(URI2);
      });

      it("Show correct current version", async function () {
        const appNft = await deploy();
        const uri = await appNft.tokenURI(1)
        expect(uri).to.equal(URI);
        await appNft.updateApp(URI2);
        const uri2 = await appNft.tokenURI(1)
        expect(uri2).to.equal(URI2);
      });

      it("Not permit non-owners of the app to update versions", async function() {
        const appNft = await deploy();
        const uri = await appNft.tokenURI(1)
        expect(uri).to.equal(URI);
        const [owner, otherAccount] = await ethers.getSigners();
        let err;
        try {
          await appNft.connect(otherAccount).updateApp(URI2);
          const uri2 = await appNft.tokenURI(1)
          expect(uri2).to.equal(URI2); 
        } catch (error) {
          err = error.message;                    
        }        
        expect(err).to.equal("VM Exception while processing transaction: reverted with reason string 'Only the app owner can make this change'");
      })
  });

  describe("Transfers", function () {
    it("Not permit transfers from unapproved and non-owner persons", async function() {
      const appNft = await deploy();
      const [owner, otherAccount] = await ethers.getSigners();
      let err;
      try {
        await appNft.connect(otherAccount).transferFrom(owner.address, otherAccount.address, 1);
      } catch (error) {
        err = error.message;
      }

      expect(err).to.equal("VM Exception while processing transaction: reverted with reason string 'ERC721: caller is not token owner nor approved'");      
    });

    it("Allow transfers from owner to another address", async function() {
      const appNft = await deploy();
      const [owner, otherAccount] = await ethers.getSigners();
      await appNft.transferFrom(owner.address, otherAccount.address, 1);   
      expect(await appNft.appOwner()).to.equal(otherAccount.address);
      expect(await appNft.ownerOf(1)).to.equal(otherAccount.address);
    });

    it("Allow transfer from non-owner if address is approved", async function() {
      const appNft = await deploy();
      const [owner, otherAccount] = await ethers.getSigners();
      await appNft.approve(otherAccount.address, 1);   
      await appNft.connect(otherAccount).transferFrom(owner.address, otherAccount.address, 1);
      expect(await appNft.appOwner()).to.equal(otherAccount.address);
      expect(await appNft.ownerOf(1)).to.equal(otherAccount.address);
    })
  })
});