/*
 * 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 <ledger.h>

#include "work.h"

namespace ledger {

void handle_debug_options(int argc, char * argv[])
{
  for (int i = 1; i < argc; i++) {
    if (argv[i][0] == '-') {
      if (std::strcmp(argv[i], "--verify") == 0) {
#if defined(VERIFY_ON)
	verify_enabled = true; // global in utils.h
#endif
      }
      else if (std::strcmp(argv[i], "--verbose") == 0 ||
	       std::strcmp(argv[i], "-v") == 0) {
#if defined(LOGGING_ON)
	_log_level = LOG_INFO; // global in utils.h
#endif
      }
      else if (i + 1 < argc && std::strcmp(argv[i], "--debug") == 0) {
#if defined(DEBUG_ON)
	_log_level    = LOG_DEBUG; // global in utils.h
	_log_category = argv[i + 1]; // global in utils.h
	i++;
#endif
      }
      else if (i + 1 < argc && std::strcmp(argv[i], "--trace") == 0) {
#if defined(TRACING_ON)
	_log_level   = LOG_TRACE; // global in utils.h
	try {
	  // global in utils.h
	  _trace_level = boost::lexical_cast<int>(argv[i + 1]);
	}
	catch (const boost::bad_lexical_cast& e) {
	  throw std::logic_error("Argument to --trace must be an integer");
	}
	i++;
#endif
      }
    }
  }
}

void read_environment_settings(report_t& report, char * envp[])
{
  TRACE_START(environment, 1, "Processed environment variables");

  process_environment(const_cast<const char **>(envp), "LEDGER_",
		      report);

#if 1
  // These are here for backwards compatability, but are deprecated.

  if (const char * p = std::getenv("LEDGER"))
    process_option("file", report, p, "LEDGER");
  if (const char * p = std::getenv("LEDGER_INIT"))
    process_option("init-file", report, p, "LEDGER_INIT");
  if (const char * p = std::getenv("PRICE_HIST"))
    process_option("price-db", report, p, "PRICE_HIST");
  if (const char * p = std::getenv("PRICE_EXP"))
    process_option("price-exp", report, p, "PRICE_EXP");
#endif

  TRACE_FINISH(environment, 1);
}

strings_list read_command_arguments(scope_t& scope, strings_list args)
{
  TRACE_START(arguments, 1, "Processed command-line arguments");

  strings_list remaining = process_arguments(args, scope);

  TRACE_FINISH(arguments, 1);

  return remaining;
}

void normalize_session_options(session_t& session)
{
  INFO("Initialization file is " << session.init_file->string());
  INFO("Price database is " << session.price_db->string());

  foreach (const path& pathname, session.data_files)
    INFO("Journal file is " << pathname.string());
}

function_t look_for_precommand(scope_t& scope, const string& verb)
{
  if (expr_t::ptr_op_t def = scope.lookup(string("ledger_precmd_") + verb))
    return def->as_function();
  else
    return function_t();
}

function_t look_for_command(scope_t& scope, const string& verb)
{
  if (expr_t::ptr_op_t def = scope.lookup(string("ledger_cmd_") + verb))
    return def->as_function();
  else
    return function_t();
}

void normalize_report_options(report_t& report, const string& verb)
{
  // Patch up some of the reporting options based on what kind of
  // command it was.

  // jww (2008-08-14): This code really needs to be rationalized away
  // for 3.0.

  if (verb == "print" || verb == "entry" || verb == "dump") {
    report.show_related     = true;
    report.show_all_related = true;
  }
  else if (verb == "equity") {
    report.show_subtotal = true;
  }
  else if (report.show_related) {
    if (verb[0] == 'r') {
      report.show_inverted = true;
    } else {
      report.show_subtotal    = true;
      report.show_all_related = true;
    }
  }

  if (verb[0] != 'b' && verb[0] != 'r')
    report.what_to_keep.keep_base = true;

  // Setup the default value for the display predicate

  if (report.display_predicate.empty()) {
    if (verb[0] == 'b') {
      if (! report.show_empty)
	report.display_predicate = "total";
      if (! report.show_subtotal) {
	if (! report.display_predicate.empty())
	  report.display_predicate += "&";
	report.display_predicate += "depth<=1";
      }
    }
    else if (verb == "equity") {
      report.display_predicate = "amount_expr"; // jww (2008-08-14): ???
    }
    else if (verb[0] == 'r' && ! report.show_empty) {
      report.display_predicate = "amount";
    }
  }

  if (! report.report_period.empty() && ! report.sort_all)
    report.entry_sort = true;
}

} // namespace ledger