#include <noto/errors.hpp>

#include <cstdint>
#include <expected>
#include <string>
#include <string_view>

#include <sqlite3.h>

#include <modulus.hpp>

#include <noto/detail/errors.hpp>


namespace {

auto code_from(std::int32_t code) -> std::int32_t {
  switch (code & 0xff) {
  case SQLITE_OK:
  case SQLITE_ROW:
  case SQLITE_DONE:
    return 0;
  case SQLITE_MISUSE:
  case SQLITE_RANGE:
    return noto::detail::error_invalid_argument;
  case SQLITE_NOTFOUND:
  case SQLITE_EMPTY:
    return noto::detail::error_not_found;
  case SQLITE_BUSY:
  case SQLITE_LOCKED:
    return noto::detail::error_unavailable;
  case SQLITE_INTERRUPT:
    return noto::detail::error_canceled;
  case SQLITE_AUTH:
  case SQLITE_PERM:
  case SQLITE_READONLY:
    return noto::detail::error_permission_denied;
  case SQLITE_CONSTRAINT:
    return noto::detail::error_constraint_violation;
  case SQLITE_ERROR:
    return noto::detail::error_syntax_error;
  case SQLITE_CORRUPT:
  case SQLITE_NOTADB:
    return noto::detail::error_data_loss;
  case SQLITE_IOERR:
  case SQLITE_CANTOPEN:
    return noto::detail::error_unavailable;
  case SQLITE_NOMEM:
    return noto::detail::error_resource_exhausted;
  default:
    return noto::detail::error_internal;
  }
}

auto message_from(std::int32_t code, sqlite3 *database, std::string_view operation) -> std::string {
  auto message = std::string{};
  if (!operation.empty()) {
    message += operation;
    message += ": ";
  }
  if (database != nullptr) {
    message += sqlite3_errmsg(database);
  } else {
    message += sqlite3_errstr(code);
  }
  return message;
}

}

auto noto::error_from(std::int32_t code, sqlite3 *database, std::string_view operation) -> modulus::error {
  return noto::detail::make_error(code_from(code), message_from(code, database, operation));
}

auto noto::result_from(std::int32_t code, sqlite3 *database, std::string_view operation) -> std::expected<void, modulus::error> {
  if (code == SQLITE_OK || code == SQLITE_ROW || code == SQLITE_DONE) {
    return {};
  }
  return noto::detail::fail_void(noto::error_from(code, database, operation));
}