-module(gleeth@commands@estimate_gas).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/gleeth/commands/estimate_gas.gleam").
-export([execute/5]).

-file("src/gleeth/commands/estimate_gas.gleam", 102).
-spec print_cost_estimates(integer()) -> nil.
print_cost_estimates(Gas_units) ->
    gleam_stdlib:println(<<""/utf8>>),
    gleam_stdlib:println(<<"Cost Estimates:"/utf8>>),
    Gas_prices = [{10, <<"10 gwei (slow)"/utf8>>},
        {20, <<"20 gwei (standard)"/utf8>>},
        {50, <<"50 gwei (fast)"/utf8>>},
        {100, <<"100 gwei (very fast)"/utf8>>}],
    gleam@list:each(
        Gas_prices,
        fun(Price_info) ->
            {Gwei, Label} = Price_info,
            Wei_cost = (Gas_units * Gwei) * 1000000000,
            Eth_cost = erlang:float(Wei_cost) / 1000000000000000000.0,
            gleam_stdlib:println(
                <<<<<<<<"  "/utf8, Label/binary>>/binary, ": "/utf8>>/binary,
                        (gleam_stdlib:float_to_string(Eth_cost))/binary>>/binary,
                    " ETH"/utf8>>
            )
        end
    ).

-file("src/gleeth/commands/estimate_gas.gleam", 32).
-spec print_gas_estimate(binary(), binary(), binary(), binary(), binary()) -> nil.
print_gas_estimate(From, To, Value, Data, Gas_estimate) ->
    gleam_stdlib:println(<<"Gas Estimation:"/utf8>>),
    case From of
        <<""/utf8>> ->
            nil;

        _ ->
            gleam_stdlib:println(<<"  From: "/utf8, From/binary>>)
    end,
    case To of
        <<""/utf8>> ->
            nil;

        _ ->
            gleam_stdlib:println(<<"  To: "/utf8, To/binary>>)
    end,
    case Value of
        <<""/utf8>> ->
            nil;

        _ ->
            case gleeth@utils@hex:hex_to_int(Value) of
                {ok, Decimal_wei} ->
                    gleam_stdlib:println(
                        <<<<<<<<"  Value: "/utf8,
                                        (erlang:integer_to_binary(Decimal_wei))/binary>>/binary,
                                    " wei ("/utf8>>/binary,
                                Value/binary>>/binary,
                            ")"/utf8>>
                    );

                {error, _} ->
                    gleam_stdlib:println(<<"  Value: "/utf8, Value/binary>>)
            end
    end,
    case Data of
        <<""/utf8>> ->
            nil;

        _ ->
            Data_preview = case string:length(Data) > 42 of
                true ->
                    <<(gleam@string:slice(Data, 0, 42))/binary, "..."/utf8>>;

                false ->
                    Data
            end,
            gleam_stdlib:println(<<"  Data: "/utf8, Data_preview/binary>>)
    end,
    gleam_stdlib:println(<<""/utf8>>),
    gleam_stdlib:println(<<"Estimated Gas: "/utf8, Gas_estimate/binary>>),
    case gleeth@utils@hex:hex_to_int(Gas_estimate) of
        {ok, Decimal_gas} ->
            gleam_stdlib:println(
                <<<<"Estimated Gas (decimal): "/utf8,
                        (erlang:integer_to_binary(Decimal_gas))/binary>>/binary,
                    " units"/utf8>>
            ),
            print_cost_estimates(Decimal_gas);

        {error, _} ->
            gleam_stdlib:println(
                <<"(Could not convert gas estimate to decimal)"/utf8>>
            )
    end,
    gleam_stdlib:println(<<""/utf8>>).

-file("src/gleeth/commands/estimate_gas.gleam", 13).
-spec execute(
    gleeth@provider:provider(),
    binary(),
    binary(),
    binary(),
    binary()
) -> {ok, nil} | {error, gleeth@rpc@types:gleeth_error()}.
execute(Provider, From, To, Value, Data) ->
    gleam@result:'try'(
        gleeth@rpc@methods:estimate_gas(Provider, From, To, Value, Data),
        fun(Gas_estimate) ->
            print_gas_estimate(From, To, Value, Data, Gas_estimate),
            {ok, nil}
        end
    ).