// Copyright (c) 2024 Epic Games Tools
// Licensed under the MIT license (https://opensource.org/license/mit/)

////////////////////////////////
//~ rjf: Globals/Thread-Locals

C_LINKAGE thread_static Log *log_active;
#if !BUILD_SUPPLEMENTARY_UNIT
C_LINKAGE thread_static Log *log_active = 0;
#endif

////////////////////////////////
//~ rjf: Log Creation/Selection

internal Log *
log_alloc(void)
{
  Arena *arena = arena_alloc();
  Log *log = push_array(arena, Log, 1);
  log->arena = arena;
  return log;
}

internal void
log_release(Log *log)
{
  arena_release(log->arena);
}

internal void
log_select(Log *log)
{
  log_active = log;
}

////////////////////////////////
//~ rjf: Log Building/Clearing

internal void
log_msg(LogMsgKind kind, String8 string)
{
  if(log_active != 0 && log_active->top_scope != 0)
  {
    String8 string_copy = push_str8_copy(log_active->arena, string);
    str8_list_push(log_active->arena, &log_active->top_scope->strings[kind], string_copy);
  }
}

internal void
log_msgf(LogMsgKind kind, char *fmt, ...)
{
  if(log_active != 0)
  {
    Temp scratch = scratch_begin(0, 0);
    va_list args;
    va_start(args, fmt);
    String8 string = push_str8fv(scratch.arena, fmt, args);
    log_msg(kind, string);
    va_end(args);
    scratch_end(scratch);
  }
}

////////////////////////////////
//~ rjf: Log Scopes

internal void
log_scope_begin(void)
{
  if(log_active != 0)
  {
    U64 pos = arena_pos(log_active->arena);
    LogScope *scope = push_array(log_active->arena, LogScope, 1);
    scope->pos = pos;
    SLLStackPush(log_active->top_scope, scope);
  }
}

internal LogScopeResult
log_scope_end(Arena *arena)
{
  LogScopeResult result = {0};
  if(log_active != 0)
  {
    LogScope *scope = log_active->top_scope;
    if(scope != 0)
    {
      SLLStackPop(log_active->top_scope);
      if(arena != 0)
      {
        for(EachEnumVal(LogMsgKind, kind))
        {
          Temp scratch = scratch_begin(&arena, 1);
          String8 result_unindented = str8_list_join(scratch.arena, &scope->strings[kind], 0);
          result.strings[kind] = indented_from_string(arena, result_unindented);
          scratch_end(scratch);
        }
      }
      arena_pop_to(log_active->arena, scope->pos);
    }
  }
  return result;
}