#include "ScopableName.h"

#include <fmt/format.h>

#include "clib/clib.h"

namespace Pol::Bscript::Compiler
{
ScopableName::ScopableName( const ScopeName& scope, std::string name )
    : scope( scope ), name( std::move( name ) )
{
}

ScopableName::ScopableName( std::string scope, std::string name )
    : ScopableName( ScopeName( std::move( scope ) ), std::move( name ) )
{
}

bool ScopableName::global() const
{
  return scope.global();
}

std::string ScopableName::string() const
{
  return fmt::format( "{}{}{}", scope.string(), scope.global() ? "" : "::", name );
}

bool ScopableName::operator<( const ScopableName& other ) const
{
  // Check for special equality condition: <nullopt>::Foo == Foo::Foo
  if ( scope.empty() && !other.scope.empty() )
  {
    std::string expectedScope = name + "::" + name;
    if ( stricmp( other.string().c_str(), expectedScope.c_str() ) == 0 )
    {
      // 'this' is considered equal to 'other' for this special case
      return false;
    }
  }
  else if ( !scope.empty() && other.scope.empty() )
  {
    std::string expectedScope = other.name + "::" + other.name;
    if ( stricmp( string().c_str(), expectedScope.c_str() ) == 0 )
    {
      // 'other' is considered equal to 'this' for this special case
      return false;
    }
  }

  // Compare scopes first
  if ( !scope.empty() && !other.scope.empty() )
  {
    int scopeComparison = stricmp( scope.string().c_str(), other.scope.string().c_str() );
    if ( scopeComparison < 0 )
    {
      return true;
    }
    if ( scopeComparison > 0 )
    {
      return false;
    }
  }
  else if ( !scope.empty() && other.scope.empty() )
  {
    return false;
  }
  else if ( scope.empty() && !other.scope.empty() )
  {
    return true;
  }

  // If scopes are equal (both empty or both equal), compare names
  return stricmp( name.c_str(), other.name.c_str() ) < 0;
}
}  // namespace Pol::Bscript::Compiler

fmt::format_context::iterator fmt::formatter<Pol::Bscript::Compiler::ScopableName>::format(
    const Pol::Bscript::Compiler::ScopableName& scoped_name, fmt::format_context& ctx ) const
{
  // Uses .empty() vs .global() to distinguish "::foo" vs "foo".
  return fmt::formatter<std::string>::format(
      fmt::format( "{}{}{}", scoped_name.scope.string(),
                   scoped_name.scope.empty() ? "" : "::", scoped_name.name ),
      ctx );
}