/*
 * .============.
 * // M A K E / \
 * // C++ DEV / \
 * // E A S Y / \/ \
 * ++ ----------. \/\ .
 * \\ \ \ /\ /
 * \\ \ \ /
 * \\ \ \ /
 * -============'
 *
 * Copyright (c) 2018 Hevake and contributors, all rights reserved.
 *
 * This file is part of cpp-tbox (https://github.com/cpp-main/cpp-tbox)
 * Use of this source code is governed by MIT license that can be found
 * in the LICENSE file in the root of the source tree. All contributing
 * project authors may be found in the CONTRIBUTORS.md file in the root
 * of the source tree.
 */
#include "sequence_action.h"

#include <algorithm>
#include <tbox/base/log.h>
#include <tbox/base/json.hpp>
#include <tbox/base/assert.h>

namespace tbox {
namespace flow {

using namespace std::placeholders;

SequenceAction::SequenceAction(event::Loop &loop, Mode mode)
 : SerialAssembleAction(loop, "Sequence")
 , mode_(mode)
{ }

SequenceAction::~SequenceAction() {
 for (auto action : children_)
 delete action;
}

void SequenceAction::toJson(Json &js) const {
 SerialAssembleAction::toJson(js);

 Json &js_children = js["children"];
 for (auto action : children_) {
 Json js_child;
 action->toJson(js_child);
 js_children.push_back(std::move(js_child));
 }

 js["mode"] = ToString(mode_);
 js["index"] = index_;
}

int SequenceAction::addChild(Action *child) {
 if (child == nullptr) {
 LogWarn("%d:%s[%s], add child %d:%s[%s] fail, child == nullptr",
 id(), type().c_str(), label().c_str());
 return false;
 }

 if (!child->setParent(this))
 return false;

 int index = children_.size();
 child->setFinishCallback(std::bind(&SequenceAction::onChildFinished, this, _1, _2, _3));
 child->setBlockCallback(std::bind(&SequenceAction::block, this, _1, _2));
 children_.push_back(child);

 return index;
}

bool SequenceAction::isReady() const {
 if (children_.empty()) {
 LogWarn("%d:%s[%s], no child, not ready");
 return false;
 }

 for (auto child : children_) {
 if (!child->isReady())
 return false;
 }
 return true;
}

void SequenceAction::onStart() {
 SerialAssembleAction::onStart();

 startOtheriseFinish(true, Reason(), Trace());
}

void SequenceAction::onReset() {
 index_ = 0;
 for (auto child : children_)
 child->reset();

 SerialAssembleAction::onReset();
}

void SequenceAction::startOtheriseFinish(bool is_succ, const Reason &reason, const Trace &trace) {
 if (index_ < children_.size()) {
 if (!startThisAction(children_.at(index_)))
 finish(false, Reason(ACTION_REASON_START_CHILD_FAIL, "StartChildFail"));

 } else {
 finish(is_succ, reason, trace);
 }
}

void SequenceAction::onChildFinished(bool is_succ, const Reason &reason, const Trace &trace) {
 if (handleChildFinishEvent([this, is_succ, reason, trace] { onChildFinished(is_succ, reason, trace); }))
 return;

 if ((mode_ == Mode::kAnySucc && is_succ) ||
 (mode_ == Mode::kAnyFail && !is_succ)) {
 finish(is_succ, reason, trace);

 } else {
 ++index_;
 startOtheriseFinish(is_succ, reason, trace);
 }
}

std::string SequenceAction::ToString(Mode mode) {
 const char *tbl[] = { "AllFinish", "AnyFail", "AnySucc" };

 auto index = static_cast<size_t>(mode);
 if (index < NUMBER_OF_ARRAY(tbl))
 return tbl[index];

 return std::to_string(index);
}

}
}