toon_codec

-module(toon_codec@error).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/toon_codec/error.gleam").
-export([error_to_string/1, parse_error/3, validation_error/1, structure_error/1, invalid_escape/2, unterminated_string/1, count_mismatch/3, indentation_error/2, missing_colon/1, invalid_header/2, delimiter_mismatch/2]).
-export_type([toon_error/0]).

-if(?OTP_RELEASE >= 27).
-define(MODULEDOC(Str), -moduledoc(Str)).
-define(DOC(Str), -doc(Str)).
-else.
-define(MODULEDOC(Str), -compile([])).
-define(DOC(Str), -compile([])).
-endif.

?MODULEDOC(
    " Error types and utility functions for TOON encoding/decoding.\n"
    "\n"
    " This module defines all error types that can occur during TOON operations\n"
    " and provides helper functions for error formatting and handling.\n"
    " Comprehensive error type for TOON operations.\n"
    "\n"
    " Each variant provides context about what went wrong, including line numbers\n"
    " and positions where applicable for better error reporting.\n"
    " Convert a ToonError to a human-readable error message.\n"
    "\n"
    " ## Examples\n"
    "\n"
    " ```gleam\n"
    " let error = MissingColon(line: 5)\n"
    " error_to_string(error)\n"
    " // -> \"Missing colon after key at line 5\"\n"
    " ```\n"
    " Create a parse error with context.\n"
    " Create a validation error.\n"
    " Create a structure error.\n"
    " Create an invalid escape error.\n"
    " Create an unterminated string error.\n"
    " Create a count mismatch error.\n"
    " Create an indentation error.\n"
    " Create a missing colon error.\n"
    " Create an invalid header error.\n"
    " Create a delimiter mismatch error.\n"
).

-type toon_error() :: {parse_error, binary(), integer(), integer()} |
    {validation_error, binary()} |
    {structure_error, binary()} |
    {invalid_escape, binary(), integer()} |
    {unterminated_string, integer()} |
    {count_mismatch, integer(), integer(), binary()} |
    {indentation_error, binary(), integer()} |
    {missing_colon, integer()} |
    empty_input |
    {invalid_header, binary(), integer()} |
    {delimiter_mismatch, binary(), integer()}.

-file("src/toon_codec/error.gleam", 60).
-spec error_to_string(toon_error()) -> binary().
error_to_string(Error) ->
    case Error of
        {parse_error, Message, Line, Column} ->
            <<<<<<<<<<"Parse error at line "/utf8,
                                (erlang:integer_to_binary(Line))/binary>>/binary,
                            ", column "/utf8>>/binary,
                        (erlang:integer_to_binary(Column))/binary>>/binary,
                    ": "/utf8>>/binary,
                Message/binary>>;

        {validation_error, Message@1} ->
            <<"Validation error: "/utf8, Message@1/binary>>;

        {structure_error, Message@2} ->
            <<"Structure error: "/utf8, Message@2/binary>>;

        {invalid_escape, Sequence, Position} ->
            <<<<<<"Invalid escape sequence '\\"/utf8, Sequence/binary>>/binary,
                    "' at position "/utf8>>/binary,
                (erlang:integer_to_binary(Position))/binary>>;

        {unterminated_string, Position@1} ->
            <<"Unterminated string: missing closing quote at position "/utf8,
                (erlang:integer_to_binary(Position@1))/binary>>;

        {count_mismatch, Expected, Actual, Context} ->
            <<<<<<<<<<"Count mismatch in "/utf8, Context/binary>>/binary,
                            ": expected "/utf8>>/binary,
                        (erlang:integer_to_binary(Expected))/binary>>/binary,
                    " but got "/utf8>>/binary,
                (erlang:integer_to_binary(Actual))/binary>>;

        {indentation_error, Message@3, Line@1} ->
            <<<<<<"Indentation error at line "/utf8,
                        (erlang:integer_to_binary(Line@1))/binary>>/binary,
                    ": "/utf8>>/binary,
                Message@3/binary>>;

        {missing_colon, Line@2} ->
            <<"Missing colon after key at line "/utf8,
                (erlang:integer_to_binary(Line@2))/binary>>;

        empty_input ->
            <<"Cannot decode empty input: input must be a non-empty string"/utf8>>;

        {invalid_header, Message@4, Line@3} ->
            <<<<<<"Invalid header at line "/utf8,
                        (erlang:integer_to_binary(Line@3))/binary>>/binary,
                    ": "/utf8>>/binary,
                Message@4/binary>>;

        {delimiter_mismatch, Expected@1, Line@4} ->
            <<<<<<<<"Delimiter mismatch at line "/utf8,
                            (erlang:integer_to_binary(Line@4))/binary>>/binary,
                        ": expected '"/utf8>>/binary,
                    Expected@1/binary>>/binary,
                "'"/utf8>>
    end.

-file("src/toon_codec/error.gleam", 114).
-spec parse_error(binary(), integer(), integer()) -> toon_error().
parse_error(Message, Line, Column) ->
    {parse_error, Message, Line, Column}.

-file("src/toon_codec/error.gleam", 118).
-spec validation_error(binary()) -> toon_error().
validation_error(Message) ->
    {validation_error, Message}.

-file("src/toon_codec/error.gleam", 122).
-spec structure_error(binary()) -> toon_error().
structure_error(Message) ->
    {structure_error, Message}.

-file("src/toon_codec/error.gleam", 126).
-spec invalid_escape(binary(), integer()) -> toon_error().
invalid_escape(Sequence, Position) ->
    {invalid_escape, Sequence, Position}.

-file("src/toon_codec/error.gleam", 130).
-spec unterminated_string(integer()) -> toon_error().
unterminated_string(Position) ->
    {unterminated_string, Position}.

-file("src/toon_codec/error.gleam", 134).
-spec count_mismatch(integer(), integer(), binary()) -> toon_error().
count_mismatch(Expected, Actual, Context) ->
    {count_mismatch, Expected, Actual, Context}.

-file("src/toon_codec/error.gleam", 138).
-spec indentation_error(binary(), integer()) -> toon_error().
indentation_error(Message, Line) ->
    {indentation_error, Message, Line}.

-file("src/toon_codec/error.gleam", 142).
-spec missing_colon(integer()) -> toon_error().
missing_colon(Line) ->
    {missing_colon, Line}.

-file("src/toon_codec/error.gleam", 146).
-spec invalid_header(binary(), integer()) -> toon_error().
invalid_header(Message, Line) ->
    {invalid_header, Message, Line}.

-file("src/toon_codec/error.gleam", 150).
-spec delimiter_mismatch(binary(), integer()) -> toon_error().
delimiter_mismatch(Expected, Line) ->
    {delimiter_mismatch, Expected, Line}.