import { MetaMaskState } from "../metamask-context";
import { reducer } from "../reducer";

describe("state reducer, edge cases", () => {
  test('transition from "initializing" to "connecting" is not allowed', () => {
    jest.spyOn(console, "warn").mockImplementationOnce(() => {});
    const initialState: MetaMaskState = {
      account: null,
      chainId: null,
      status: "initializing",
    };
    const state = reducer(initialState, { type: "metaMaskConnecting" });
    expect(initialState).toEqual(state);
  });
  test('transition from "unavailable" to "connecting" is not allowed', () => {
    jest.spyOn(console, "warn").mockImplementationOnce(() => {});
    const initialState: MetaMaskState = {
      account: null,
      chainId: null,
      status: "unavailable",
    };
    const state = reducer(initialState, { type: "metaMaskConnecting" });
    expect(initialState).toEqual(state);
  });

  test('transition from "initializing" to "notConnected" is not allowed', () => {
    jest.spyOn(console, "warn").mockImplementationOnce(() => {});
    const initialState: MetaMaskState = {
      account: null,
      chainId: null,
      status: "initializing",
    };
    const state = reducer(initialState, { type: "metaMaskPermissionRejected" });
    expect(initialState).toEqual(state);
  });
  test('transition from "unavailable" to "notConnected" is not allowed', () => {
    jest.spyOn(console, "warn").mockImplementationOnce(() => {});
    const initialState: MetaMaskState = {
      account: null,
      chainId: null,
      status: "unavailable",
    };
    const state = reducer(initialState, { type: "metaMaskPermissionRejected" });
    expect(initialState).toEqual(state);
  });
  test('change of accounts when not in statuts "connected" is not allowed', () => {
    jest.spyOn(console, "warn").mockImplementationOnce(() => {});
    const initialState: MetaMaskState = {
      account: null,
      chainId: null,
      status: "unavailable",
    };
    const state = reducer(initialState, {
      type: "metaMaskAccountsChanged",
      payload: ["0x123"],
    });
    expect(initialState).toEqual(state);
  });
  test('change of chain ID when in statuts "initializing" is not allowed', () => {
    jest.spyOn(console, "warn").mockImplementationOnce(() => {});
    const initialState: MetaMaskState = {
      account: null,
      chainId: null,
      status: "initializing",
    };
    const state = reducer(initialState, {
      type: "metaMaskChainChanged",
      payload: "0x1",
    });
    expect(initialState).toEqual(state);
  });
  test('change of chain ID when in statuts "unavailable" is not allowed', () => {
    jest.spyOn(console, "warn").mockImplementationOnce(() => {});
    const initialState: MetaMaskState = {
      account: null,
      chainId: null,
      status: "unavailable",
    };
    const state = reducer(initialState, {
      type: "metaMaskChainChanged",
      payload: "0x1",
    });
    expect(initialState).toEqual(state);
  });
});