#include "matador/sql/dialect.hpp"
#include "matador/sql/column.hpp"

#include "matador/utils/string.hpp"

namespace matador::sql {

dialect::dialect(const dialect::token_to_string_map &token_replace_map, const dialect::data_type_to_string_map &data_type_replace_map)
{
  for (const auto &token : token_replace_map) {
    tokens_[token.first] = token.second;
  }

  for (const auto &data_type : data_type_replace_map) {
    data_types_[data_type.first] = data_type.second;
  }
}

dialect::dialect(const dialect::data_type_to_string_map &data_type_replace_map)
: dialect({}, data_type_replace_map)
{}

dialect::dialect(const dialect::token_to_string_map &token_replace_map)
: dialect(token_replace_map, {})
{}

const std::string& dialect::token_at(dialect::token_t token) const
{
  return tokens_.at(token);
}

const std::string &dialect::data_type_at(data_type_t type) const
{
  return data_types_.at(type);
}

std::string dialect::prepare_identifier(const column &col) const
{
  std::string result(col.name());
  if (!col.is_function()) {
    escape_quotes_in_identifier(result);
    quote_identifier(result);
  } else {
    result = sql_func_map_.at(col.function()) + "(" + result + ")";
  }
  if (!col.alias().empty()) {
    result += " AS " + col.alias();
  }
  return result;
}

std::string dialect::prepare_literal(const std::string &str) const
{
  std::string result(str);
  escape_quotes_in_literals(result);
  return result;
}

void dialect::quote_identifier(std::string &str) const
{
  str.insert(0, token_at(token_t::START_QUOTE));
  str += token_at(token_t::END_QUOTE);
}

void dialect::escape_quotes_in_identifier(std::string &str) const
{
  const std::string open_char(token_at(token_t::START_QUOTE));
  std::string close_char(token_at(token_t::END_QUOTE));
  if (identifier_escape_type() == escape_identifier_t::ESCAPE_CLOSING_BRACKET) {
    utils::replace_all(str, close_char, close_char + close_char);
  } else {
    utils::replace_all(str, open_char, open_char + open_char);
  }
}

void dialect::escape_quotes_in_literals(std::string &str) const
{
  const std::string single_quote(token_at(token_t::STRING_QUOTE));
  const std::string double_quote(token_at(token_t::STRING_QUOTE) + token_at(token_t::STRING_QUOTE));
  utils::replace_all(str, single_quote, double_quote);
}

dialect::escape_identifier_t dialect::identifier_escape_type() const
{
  return dialect::escape_identifier_t::ESCAPE_BOTH_SAME;
}

std::string dialect::next_placeholder() const
{
  return "?";
}

void dialect::add_host_var(const std::string &host_var)
{
  host_vars_.emplace_back(host_var);
}

void dialect::add_column(const std::string &column)
{
  columns_.emplace_back(column);
}

const std::vector<std::string> &dialect::host_vars() const
{
  return host_vars_;
}

const std::vector<std::string> &dialect::columns() const
{
  return columns_;
}

}