defmodule Ethers.MulticallTest do
  use ExUnit.Case

  import Ethers.Utils, only: [hex_decode!: 1]
  import Ethers.TestHelpers

  alias Ethers.Contract.Test.CounterContract
  alias Ethers.Contract.Test.HelloWorldContract
  alias Ethers.Contract.Test.HelloWorldWithDefaultAddressContract
  alias Ethers.Contracts.Multicall3
  alias Ethers.Multicall

  @from "0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266"
  setup_all :deploy_contracts

  describe "multicall" do
    test "aggregate3 with no default address using Ethers.call", %{
      counter_address: counter_address,
      hello_world_address: hello_world_address
    } do
      [true: "Hello World!", true: 420, true: 420] =
        [
          {HelloWorldContract.say_hello(), to: hello_world_address},
          {CounterContract.get(), to: counter_address},
          {CounterContract.get(), to: counter_address, allow_failure: false}
        ]
        |> Multicall.aggregate3()
        |> Ethers.call!()
        |> Multicall.aggregate3_decode([
          HelloWorldContract.say_hello(),
          CounterContract.get(),
          CounterContract.get()
        ])
    end

    test "aggregate3 with default address" do
      calls =
        [
          {HelloWorldWithDefaultAddressContract.say_hello(), []},
          HelloWorldWithDefaultAddressContract.say_hello()
        ]

      [true: nil, true: nil] =
        calls
        |> Multicall.aggregate3()
        |> Ethers.call!()
        |> Multicall.aggregate3_decode(calls)

      [true: nil, true: nil] =
        calls
        |> Multicall.aggregate3()
        |> Ethers.call!()
        |> Multicall.decode(calls)
    end

    test "aggregate3 with reduced abstraction and no decoding", %{
      counter_address: counter_address,
      hello_world_address: hello_world_address
    } do
      {:ok,
       [
         true:
           <<0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
             0, 0, 0, 32, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
             0, 0, 0, 0, 0, 0, 0, 12, 72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100, 33, 0,
             0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0>>,
         false: "",
         true:
           <<0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
             0, 0, 1, 164>>,
         false: ""
       ]} =
        [
          {hello_world_address, true, hex_decode!("0xef5fb05b")},
          {hello_world_address, true, hex_decode!("0x6d4ce63c")},
          {counter_address, true, hex_decode!("0x6d4ce63c")},
          {counter_address, true, hex_decode!("0xef5fb05b")}
        ]
        |> Multicall3.aggregate3()
        |> Ethers.call()
    end

    test "aggregate2 with no default address using Ethers.call", %{
      counter_address: counter_address,
      hello_world_address: hello_world_address
    } do
      calls =
        [
          {HelloWorldContract.say_hello(), to: hello_world_address},
          {CounterContract.get(), to: counter_address},
          {CounterContract.get(), to: counter_address, allow_failure: false}
        ]

      [block, ["Hello World!", 420, 420]] =
        calls
        |> Multicall.aggregate2()
        |> Ethers.call!()
        |> Multicall.aggregate2_decode(calls)

      {:ok, expected_block} = Ethers.current_block_number()
      assert expected_block == block

      [_block, ["Hello World!", 420, 420]] =
        calls
        |> Multicall.aggregate2()
        |> Ethers.call!()
        |> Multicall.decode(calls)
    end

    test "aggregate2 with default address" do
      [block, [nil, nil]] =
        [
          {HelloWorldWithDefaultAddressContract.say_hello(), []},
          HelloWorldWithDefaultAddressContract.say_hello()
        ]
        |> Multicall.aggregate2()
        |> Ethers.call!()
        |> Multicall.aggregate2_decode([
          HelloWorldWithDefaultAddressContract.say_hello(),
          HelloWorldWithDefaultAddressContract.say_hello()
        ])

      {:ok, expected_block} = Ethers.current_block_number()
      assert expected_block == block
    end

    test "aggregate2 with reduced abstraction and no decoding", %{
      counter_address: counter_address,
      hello_world_address: hello_world_address
    } do
      {:ok,
       [
         block,
         [
           <<0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
             0, 0, 0, 32, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
             0, 0, 0, 0, 0, 0, 0, 12, 72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100, 33, 0,
             0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0>>,
           <<0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
             0, 0, 1, 164>>
         ]
       ]} =
        [
          {hello_world_address, hex_decode!("0xef5fb05b")},
          {counter_address, hex_decode!("0x6d4ce63c")}
        ]
        |> Multicall3.aggregate()
        |> Ethers.call()

      {:ok, expected_block} = Ethers.current_block_number()
      assert expected_block == block
    end

    test "aggregate3_encode_data/1 works correctly" do
      {"0x1337", false, <<239, 95, 176, 91>>} =
        Multicall.aggregate3_encode_data(
          {HelloWorldContract.say_hello(), to: "0x1337", allow_failure: false}
        )

      {"0x1000bf6a479f320ead074411a4b0e7944ea8c9c1", false, <<239, 95, 176, 91>>} =
        Multicall.aggregate3_encode_data(
          {HelloWorldWithDefaultAddressContract.say_hello(), allow_failure: false}
        )

      {"0x1000bf6a479f320ead074411a4b0e7944ea8c9c1", true, <<239, 95, 176, 91>>} =
        Multicall.aggregate3_encode_data(HelloWorldWithDefaultAddressContract.say_hello())
    end
  end

  defp deploy_contracts(_ctx) do
    encoded_constructor = CounterContract.constructor(420)

    counter_address =
      deploy(CounterContract, encoded_constructor: encoded_constructor, from: @from)

    hello_world_address = deploy(HelloWorldContract, encoded_constructor: nil, from: @from)

    # Deploy Multicall3 to 0xcA11bde05977b3631167028862bE2a173976CA11.
    # ref: https://github.com/mds1/multicall#new-deployments

    # First, fund the account used for transaction
    Ethers.send_transaction!(%{
      from: "0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266",
      to: "0x05f32B3cC3888453ff71B01135B34FF8e41263F2",
      value: 1_000_000_000_000_000_000
    })
    |> wait_for_transaction!()

    Ethers.send_transaction(
      "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"
    )
    |> case do
      {:ok, tx_hash} -> wait_for_transaction!(tx_hash)
      _ -> :ignore
    end

    [
      counter_address: counter_address,
      hello_world_address: hello_world_address
    ]
  end
end
