/*
 * Copyright (c) 2003-2009, John Wiegley.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of New Artisans LLC nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "item.h"
#include "session.h"
#include "report.h"

namespace ledger {

bool item_t::use_effective_date = false;

namespace {
  value_t get_status(item_t& item) {
    return long(item.state());
  }
  value_t get_uncleared(item_t& item) {
    return item.state() == item_t::CLEARED;
  }
  value_t get_cleared(item_t& item) {
    return item.state() == item_t::CLEARED;
  }
  value_t get_pending(item_t& item) {
    return item.state() == item_t::PENDING;
  }

  value_t get_date(item_t& item) {
    if (optional<date_t> date = item.date())
      return *date;
    else
      return 0L;
  }

  value_t get_note(item_t& item) {
    return string_value(item.note ? *item.note : empty_string);
  }

  value_t get_beg_pos(item_t& item) {
    return long(item.beg_pos);
  }

  value_t get_beg_line(item_t& item) {
    return long(item.beg_line);
  }

  value_t get_end_pos(item_t& item) {
    return long(item.end_pos);
  }

  value_t get_end_line(item_t& item) {
    return long(item.end_line);
  }

  template <value_t (*Func)(item_t&)>
  value_t get_wrapper(call_scope_t& scope) {
    return (*Func)(find_scope<item_t>(scope));
  }
}

expr_t::ptr_op_t item_t::lookup(const string& name)
{
  switch (name[0]) {
  case 'c':
    if (name == "cleared")
      return WRAP_FUNCTOR(get_wrapper<&get_cleared>);
    break;

  case 'd':
    if (name[1] == '\0' || name == "date")
      return WRAP_FUNCTOR(get_wrapper<&get_date>);
    break;

  case 'n':
    if (name == "note")
      return WRAP_FUNCTOR(get_wrapper<&get_note>);
    break;

  case 'p':
    if (name == "pending")
      return WRAP_FUNCTOR(get_wrapper<&get_pending>);
    break;

  case 's':
    if (name == "status")
      return WRAP_FUNCTOR(get_wrapper<&get_status>);
    break;

  case 'u':
    if (name == "uncleared")
      return WRAP_FUNCTOR(get_wrapper<&get_uncleared>);
    break;

  case 'X':
    if (name[1] == '\0')
      return WRAP_FUNCTOR(get_wrapper<&get_cleared>);
    break;

  case 'Y':
    if (name[1] == '\0')
      return WRAP_FUNCTOR(get_wrapper<&get_pending>);
    break;
  }

  return session_t::current->current_report->lookup(name);
}

bool item_t::valid() const
{
  if (_state != UNCLEARED && _state != CLEARED && _state != PENDING) {
    DEBUG("ledger.validate", "item_t: state is bad");
    return false;
  }

  return true;
}

} // namespace ledger