#include "elna/gcc/elna-tree.h"
#include "elna/gcc/elna-diagnostic.h"

#include "stor-layout.h"
#include "fold-const.h"
#include "diagnostic-core.h"

tree elna_global_trees[ELNA_TI_MAX];

namespace elna
{
namespace gcc
{
    void init_ttree()
    {
        elna_string_type_node = build_pointer_type(
                build_qualified_type(char_type_node, TYPE_QUAL_CONST)); /* const char* */
    }

    bool is_pointer_type(tree type)
    {
        gcc_assert(TYPE_P(type));
        return TREE_CODE(type) == POINTER_TYPE;
    }

    tree tree_chain_base::head()
    {
        return first;
    }

    void tree_chain_base::append(tree t)
    {
        gcc_assert(t != NULL_TREE);

        if (this->first == NULL_TREE)
        {
            this->first = this->last = t;
        }
        else
        {
            chain(t);
            this->last = t;
        }
    }

    void tree_chain::chain(tree t)
    {
        TREE_CHAIN(this->last) = t;
    }

    tree_symbol_mapping::tree_symbol_mapping(tree bind_expression, tree block)
        : m_bind_expression(bind_expression), m_block(block)
    {
    }

    tree tree_symbol_mapping::bind_expression()
    {
        return m_bind_expression;
    }

    tree tree_symbol_mapping::block()
    {
        return m_block;
    }

    std::shared_ptr<boot::symbol_table<tree>> builtin_symbol_table()
    {
        std::shared_ptr<boot::symbol_table<tree>> initial_table =
            std::make_shared<boot::symbol_table<tree>>();

        initial_table->enter("Int", boot::make_info(long_integer_type_node));
        initial_table->enter("Word", boot::make_info(size_type_node));
        initial_table->enter("Bool", boot::make_info(boolean_type_node));
        initial_table->enter("Float", boot::make_info(double_type_node));
        initial_table->enter("Char", boot::make_info(unsigned_char_type_node));
        initial_table->enter("Byte", boot::make_info(make_unsigned_type(8)));
        initial_table->enter("String", boot::make_info(elna_string_type_node));

        return initial_table;
    }

    tree do_pointer_arithmetic(boot::binary_operator binary_operator, tree left, tree right)
    {
        tree result = error_mark_node;
        tree convert_expression = fold_convert(sizetype, right);

        if (binary_operator == boot::binary_operator::sum)
        {
            result = fold_build2(POINTER_PLUS_EXPR, TREE_TYPE(left), left, convert_expression);
        }
        else if (binary_operator == boot::binary_operator::subtraction)
        {
            convert_expression = fold_build1(NEGATE_EXPR, sizetype, convert_expression);
            result = fold_build2(POINTER_PLUS_EXPR, TREE_TYPE(left), left, convert_expression);
        }
        return result;
    }

    tree build_binary_operation(bool condition, boot::binary_expression *expression,
            tree_code operator_code, tree left, tree right, tree target_type)
    {
        location_t expression_location = get_location(&expression->position());
        tree left_type = TREE_TYPE(left);
        tree right_type = TREE_TYPE(right);

        if (condition)
        {
            return build2_loc(expression_location, operator_code, target_type, left, right);
        }
        else
        {
            error_at(expression_location,
                    "invalid operands of type %s and %s for operator %s",
                    print_type(left_type), print_type(right_type),
                    elna::boot::print_binary_operator(expression->operation()));
            return error_mark_node;
        }
    }
}
}