////////////////////////////////////////////////////////////////////////////////
//
// Copyright 2006 - 2021, Paul Beckingham, Federico Hernandez.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//
// https://www.opensource.org/licenses/mit-license.php
//
////////////////////////////////////////////////////////////////////////////////

#include <cmake.h>
#include <CmdStart.h>
#include <iostream>
#include <Context.h>
#include <Filter.h>
#include <main.h>
#include <format.h>
#include <util.h>

////////////////////////////////////////////////////////////////////////////////
CmdStart::CmdStart ()
{
  _keyword               = "start";
  _usage                 = "task <filter> start <mods>";
  _description           = "Marks specified task as started";
  _read_only             = false;
  _displays_id           = false;
  _needs_gc              = false;
  _uses_context          = true;
  _accepts_filter        = true;
  _accepts_modifications = true;
  _accepts_miscellaneous = false;
  _category              = Command::Category::operation;
}

////////////////////////////////////////////////////////////////////////////////
int CmdStart::execute (std::string&)
{
  int rc = 0;
  int count = 0;

  // Apply filter.
  Filter filter;
  std::vector <Task> filtered;
  filter.subset (filtered);
  if (filtered.size () == 0)
  {
    Context::getContext ().footnote ("No tasks specified.");
    return 1;
  }

  // Accumulated project change notifications.
  std::map <std::string, std::string> projectChanges;

  if(filtered.size() > 1) {
    feedback_affected("This command will alter {1} tasks.", filtered.size());
  }

  std::vector <Task> modified;
  for (auto& task : filtered)
  {
    if (! task.has ("start"))
    {
      Task before (task);

      // Start the specified task.
      std::string question = format ("Start task {1} '{2}'?",
                                     task.identifier (true),
                                     task.get ("description"));
      task.modify (Task::modAnnotate);
      task.setAsNow ("start");

      Task::status status = task.getStatus ();
      if (status == Task::completed || status == Task::deleted)
      {
        // "waiting" handled by Task::validate(), no special care needed here.
        task.setStatus (Task::pending);
      }

      if (Context::getContext ().config.getBoolean ("journal.time"))
        task.addAnnotation (Context::getContext ().config.get ("journal.time.start.annotation"));

      if (permission (taskDifferences (before, task) + question, filtered.size ()))
      {
        updateRecurrenceMask (task);
        Context::getContext ().tdb2.modify (task);
        ++count;
        feedback_affected ("Starting task {1} '{2}'.", task);
        dependencyChainOnStart (task);
        if (Context::getContext ().verbose ("project"))
          projectChanges[task.get ("project")] = onProjectChange (task, false);

        // Save unmodified task for potential nagging later
        modified.push_back(before);
      }
      else
      {
        std::cout << "Task not started.\n";
        rc = 1;
        if (_permission_quit)
          break;
      }
    }
    else
    {
      std::cout << format ("Task {1} '{2}' already started.",
                           task.id,
                           task.get ("description"))
                << '\n';
      rc = 1;
    }
  }

  nag (modified);

  // Now list the project changes.
  for (auto& change : projectChanges)
    if (change.first != "")
      Context::getContext ().footnote (change.second);

  feedback_affected (count == 1 ? "Started {1} task." : "Started {1} tasks.", count);
  return rc;
}

////////////////////////////////////////////////////////////////////////////////