-module(glsql@error).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/glsql/error.gleam").
-export([render/3]).
-export_type([error/0]).

-type error() :: {lex_error, binary(), integer()} |
    {parse_error, binary(), integer(), gleam@option:option(binary())} |
    {unknown_statement, binary(), integer(), gleam@option:option(binary())} |
    {unknown_type, binary(), integer(), gleam@option:option(binary())} |
    {validation_error, binary(), integer(), gleam@option:option(binary())} |
    {config_error, binary(), gleam@option:option(binary())} |
    {io_error, binary()}.

-file("src/glsql/error.gleam", 58).
-spec render_hint(gleam@option:option(binary())) -> binary().
render_hint(Hint) ->
    case Hint of
        none ->
            <<""/utf8>>;

        {some, H} ->
            <<<<"\nHint: did you mean `"/utf8, H/binary>>/binary, "`?\n"/utf8>>
    end.

-file("src/glsql/error.gleam", 51).
-spec header(binary(), binary()) -> binary().
header(Title, Message) ->
    case Message of
        <<""/utf8>> ->
            <<<<"error: "/utf8, Title/binary>>/binary, "\n"/utf8>>;

        _ ->
            <<<<<<<<"error: "/utf8, Title/binary>>/binary, "\n"/utf8>>/binary,
                    Message/binary>>/binary,
                "\n"/utf8>>
    end.

-file("src/glsql/error.gleam", 98).
-spec nth_line(binary(), integer()) -> binary().
nth_line(Source, Line) ->
    case begin
        _pipe = Source,
        _pipe@1 = gleam@string:split(_pipe, <<"\n"/utf8>>),
        _pipe@2 = gleam@list:drop(_pipe@1, Line - 1),
        gleam@list:first(_pipe@2)
    end of
        {ok, L} ->
            L;

        {error, nil} ->
            <<""/utf8>>
    end.

-file("src/glsql/error.gleam", 87).
-spec line_col(binary(), integer()) -> {integer(), integer()}.
line_col(Source, Pos) ->
    Before = gleam@string:slice(Source, 0, Pos),
    Lines = gleam@string:split(Before, <<"\n"/utf8>>),
    Line = erlang:length(Lines),
    Col = case gleam@list:last(Lines) of
        {ok, L} ->
            string:length(L) + 1;

        {error, nil} ->
            1
    end,
    {Line, Col}.

-file("src/glsql/error.gleam", 65).
-spec parts(error()) -> {binary(),
    binary(),
    gleam@option:option(integer()),
    gleam@option:option(binary())}.
parts(Err) ->
    case Err of
        {lex_error, M, Pos} ->
            {<<"Syntax error"/utf8>>, M, {some, Pos}, none};

        {parse_error, M@1, Pos@1, Hint} ->
            {<<"Syntax error"/utf8>>, M@1, {some, Pos@1}, Hint};

        {unknown_statement, W, Pos@2, Hint@1} ->
            {<<"Unknown statement"/utf8>>,
                <<<<"I don't know the statement `"/utf8, W/binary>>/binary,
                    "`"/utf8>>,
                {some, Pos@2},
                Hint@1};

        {unknown_type, N, Pos@3, Hint@2} ->
            {<<"Unknown type"/utf8>>,
                <<<<"I have no Gleam mapping for the SQL type `"/utf8,
                        N/binary>>/binary,
                    "`"/utf8>>,
                {some, Pos@3},
                Hint@2};

        {validation_error, M@2, Pos@4, Hint@3} ->
            {<<"Invalid schema"/utf8>>, M@2, {some, Pos@4}, Hint@3};

        {config_error, M@3, Hint@4} ->
            {<<"Invalid configuration"/utf8>>, M@3, none, Hint@4};

        {io_error, M@4} ->
            {<<"File error"/utf8>>, M@4, none, none}
    end.

-file("src/glsql/error.gleam", 16).
-spec render(error(), binary(), binary()) -> binary().
render(Err, Filename, Source) ->
    {Title, Message, Position, Hint} = parts(Err),
    case Position of
        none ->
            <<(header(Title, Message))/binary, (render_hint(Hint))/binary>>;

        {some, Pos} ->
            {Line, Col} = line_col(Source, Pos),
            Text = nth_line(Source, Line),
            Gutter = erlang:integer_to_binary(Line),
            Pad = gleam@string:repeat(<<" "/utf8>>, string:length(Gutter)),
            <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<(header(
                                                                                                    Title,
                                                                                                    <<""/utf8>>
                                                                                                ))/binary,
                                                                                                Pad/binary>>/binary,
                                                                                            "┌─ "/utf8>>/binary,
                                                                                        Filename/binary>>/binary,
                                                                                    ":"/utf8>>/binary,
                                                                                (erlang:integer_to_binary(
                                                                                    Line
                                                                                ))/binary>>/binary,
                                                                            ":"/utf8>>/binary,
                                                                        (erlang:integer_to_binary(
                                                                            Col
                                                                        ))/binary>>/binary,
                                                                    "\n"/utf8>>/binary,
                                                                Pad/binary>>/binary,
                                                            " │\n"/utf8>>/binary,
                                                        Gutter/binary>>/binary,
                                                    " │ "/utf8>>/binary,
                                                Text/binary>>/binary,
                                            "\n"/utf8>>/binary,
                                        Pad/binary>>/binary,
                                    " │ "/utf8>>/binary,
                                (gleam@string:repeat(<<" "/utf8>>, Col - 1))/binary>>/binary,
                            "^ "/utf8>>/binary,
                        Message/binary>>/binary,
                    "\n"/utf8>>/binary,
                (render_hint(Hint))/binary>>
    end.