-module(galchemy@orm@identity_map).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src\\galchemy\\orm\\identity_map.gleam").
-export([empty/0, values/1, values_for_table/2, entries/1, get/3, insert/2, remove/3, upsert/2]).
-export_type([identity_entry/0, identity_map/0, identity_map_error/0]).

-type identity_entry() :: {identity_entry,
        galchemy@schema@relation:table_ref(),
        galchemy@session@unit_of_work:identity(),
        galchemy@orm@entity:entity()}.

-type identity_map() :: {identity_map, list(identity_entry())}.

-type identity_map_error() :: {entity_error, galchemy@orm@entity:entity_error()} |
    {duplicate_identity,
        galchemy@schema@relation:table_ref(),
        galchemy@session@unit_of_work:identity()}.

-file("src\\galchemy\\orm\\identity_map.gleam", 24).
-spec empty() -> identity_map().
empty() ->
    {identity_map, []}.

-file("src\\galchemy\\orm\\identity_map.gleam", 95).
-spec values(identity_map()) -> list(galchemy@orm@entity:entity()).
values(Map) ->
    gleam@list:map(
        erlang:element(2, Map),
        fun(Entry) -> erlang:element(4, Entry) end
    ).

-file("src\\galchemy\\orm\\identity_map.gleam", 99).
-spec values_for_table(identity_map(), galchemy@schema@relation:table_ref()) -> list(galchemy@orm@entity:entity()).
values_for_table(Map, Table) ->
    _pipe = erlang:element(2, Map),
    _pipe@1 = gleam@list:filter(
        _pipe,
        fun(Entry) -> erlang:element(2, Entry) =:= Table end
    ),
    gleam@list:map(_pipe@1, fun(Entry@1) -> erlang:element(4, Entry@1) end).

-file("src\\galchemy\\orm\\identity_map.gleam", 108).
-spec entries(identity_map()) -> list(identity_entry()).
entries(Map) ->
    erlang:element(2, Map).

-file("src\\galchemy\\orm\\identity_map.gleam", 112).
-spec find_entry(
    list(identity_entry()),
    galchemy@schema@relation:table_ref(),
    galchemy@session@unit_of_work:identity()
) -> gleam@option:option(identity_entry()).
find_entry(Entries, Table, Identity) ->
    case Entries of
        [] ->
            none;

        [Entry | Rest] ->
            case (erlang:element(2, Entry) =:= Table) andalso (erlang:element(
                3,
                Entry
            )
            =:= Identity) of
                true ->
                    {some, Entry};

                false ->
                    find_entry(Rest, Table, Identity)
            end
    end.

-file("src\\galchemy\\orm\\identity_map.gleam", 76).
-spec get(
    identity_map(),
    galchemy@schema@relation:table_ref(),
    galchemy@session@unit_of_work:identity()
) -> gleam@option:option(galchemy@orm@entity:entity()).
get(Map, Table, Identity) ->
    case find_entry(erlang:element(2, Map), Table, Identity) of
        {some, Entry} ->
            {some, erlang:element(4, Entry)};

        none ->
            none
    end.

-file("src\\galchemy\\orm\\identity_map.gleam", 28).
-spec insert(identity_map(), galchemy@orm@entity:entity()) -> {ok,
        identity_map()} |
    {error, identity_map_error()}.
insert(Map, Next_entity) ->
    case galchemy@orm@entity:identity(Next_entity) of
        {error, Error} ->
            {error, {entity_error, Error}};

        {ok, Next_identity} ->
            Table_ref = erlang:element(2, erlang:element(2, Next_entity)),
            case get(Map, Table_ref, Next_identity) of
                {some, _} ->
                    {error, {duplicate_identity, Table_ref, Next_identity}};

                none ->
                    {ok,
                        {identity_map,
                            lists:append(
                                erlang:element(2, Map),
                                [{identity_entry,
                                        Table_ref,
                                        Next_identity,
                                        Next_entity}]
                            )}}
            end
    end.

-file("src\\galchemy\\orm\\identity_map.gleam", 128).
-spec remove_entry(
    list(identity_entry()),
    galchemy@schema@relation:table_ref(),
    galchemy@session@unit_of_work:identity()
) -> list(identity_entry()).
remove_entry(Entries, Table, Identity) ->
    case Entries of
        [] ->
            [];

        [Entry | Rest] ->
            case (erlang:element(2, Entry) =:= Table) andalso (erlang:element(
                3,
                Entry
            )
            =:= Identity) of
                true ->
                    Rest;

                false ->
                    [Entry | remove_entry(Rest, Table, Identity)]
            end
    end.

-file("src\\galchemy\\orm\\identity_map.gleam", 87).
-spec remove(
    identity_map(),
    galchemy@schema@relation:table_ref(),
    galchemy@session@unit_of_work:identity()
) -> identity_map().
remove(Map, Table, Identity) ->
    {identity_map, remove_entry(erlang:element(2, Map), Table, Identity)}.

-file("src\\galchemy\\orm\\identity_map.gleam", 144).
-spec upsert_entry(list(identity_entry()), identity_entry()) -> list(identity_entry()).
upsert_entry(Entries, Next_entry) ->
    case Entries of
        [] ->
            [Next_entry];

        [Entry | Rest] ->
            case (erlang:element(2, Entry) =:= erlang:element(2, Next_entry))
            andalso (erlang:element(3, Entry) =:= erlang:element(3, Next_entry)) of
                true ->
                    [Next_entry | Rest];

                false ->
                    [Entry | upsert_entry(Rest, Next_entry)]
            end
    end.

-file("src\\galchemy\\orm\\identity_map.gleam", 56).
-spec upsert(identity_map(), galchemy@orm@entity:entity()) -> {ok,
        identity_map()} |
    {error, identity_map_error()}.
upsert(Map, Next_entity) ->
    case galchemy@orm@entity:identity(Next_entity) of
        {error, Error} ->
            {error, {entity_error, Error}};

        {ok, Next_identity} ->
            {ok,
                {identity_map,
                    upsert_entry(
                        erlang:element(2, Map),
                        {identity_entry,
                            erlang:element(2, erlang:element(2, Next_entity)),
                            Next_identity,
                            Next_entity}
                    )}}
    end.