//
//  AssetMappingsScriptingInterface.cpp
//  libraries/script-engine/src
//
//  Created by Ryan Huffman on 2016-03-09.
//  Copyright 2016 High Fidelity, Inc.
//
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//

#include "AssetMappingsScriptingInterface.h"

#include <QtScript/QScriptEngine>

#include <AssetRequest.h>
#include <AssetUpload.h>
#include <MappingRequest.h>
#include <NetworkLogging.h>

AssetMappingsScriptingInterface::AssetMappingsScriptingInterface() {
    _proxyModel.setSourceModel(&_assetMappingModel);
    _proxyModel.setSortRole(Qt::DisplayRole);
    _proxyModel.setDynamicSortFilter(true);
    _proxyModel.sort(0);
}

void AssetMappingsScriptingInterface::setMapping(QString path, QString hash, QJSValue callback) {
    auto assetClient = DependencyManager::get<AssetClient>();
    auto request = assetClient->createSetMappingRequest(path, hash);

    if (request) {
        connect(request, &SetMappingRequest::finished, this, [this, callback](SetMappingRequest* request) mutable {
            QJSValueList args { uint8_t(request->getError()) };

            callback.call(args);

            request->deleteLater();

        });
        
        request->start();
    } else {
        // not connected to an Asset Server, return network error
        QJSValueList args { uint8_t(MappingRequest::NetworkError) };
        callback.call(args);
    }
}

void AssetMappingsScriptingInterface::getMapping(QString path, QJSValue callback) {
    auto assetClient = DependencyManager::get<AssetClient>();
    auto request = assetClient->createGetMappingRequest(path);

    connect(request, &GetMappingRequest::finished, this, [this, callback](GetMappingRequest* request) mutable {
        QJSValueList args { uint8_t(request->getError()), request->getHash() };

        callback.call(args);

        request->deleteLater();

    });

    request->start();
}

void AssetMappingsScriptingInterface::deleteMappings(QStringList paths, QJSValue callback) {
    auto assetClient = DependencyManager::get<AssetClient>();
    auto request = assetClient->createDeleteMappingsRequest(paths);

    connect(request, &DeleteMappingsRequest::finished, this, [this, callback](DeleteMappingsRequest* request) mutable {
        QJSValueList args { uint8_t(request->getError()) };

        callback.call(args);

        request->deleteLater();

    });

    request->start();
}

void AssetMappingsScriptingInterface::getAllMappings(QJSValue callback) {
    auto assetClient = DependencyManager::get<AssetClient>();
    auto request = assetClient->createGetAllMappingsRequest();

    connect(request, &GetAllMappingsRequest::finished, this, [this, callback](GetAllMappingsRequest* request) mutable {
        auto mappings = request->getMappings();
        auto map = callback.engine()->newObject();

        for (auto& kv : mappings ) {
            map.setProperty(kv.first, kv.second);
        }

        QJSValueList args { uint8_t(request->getError()), map };

        callback.call(args);

        request->deleteLater();

    });

    request->start();
}

void AssetMappingsScriptingInterface::renameMapping(QString oldPath, QString newPath, QJSValue callback) {
    auto assetClient = DependencyManager::get<AssetClient>();
    auto request = assetClient->createRenameMappingRequest(oldPath, newPath);

    connect(request, &RenameMappingRequest::finished, this, [this, callback](RenameMappingRequest* request) mutable {
        QJSValueList args { uint8_t(request->getError()) };

        callback.call(args);

        request->deleteLater();

    });

    request->start();
}


AssetMappingItem::AssetMappingItem(const QString& name, const QString& fullPath, bool isFolder)
    : name(name),
    fullPath(fullPath),
    isFolder(isFolder) {

}

static int assetMappingModelMetatypeId = qRegisterMetaType<AssetMappingModel*>("AssetMappingModel*");

AssetMappingModel::AssetMappingModel() {
}

AssetMappingModel::~AssetMappingModel() {
    qDebug() << " DEST";
}

void AssetMappingModel::refresh() {
    qDebug() << "Refreshing asset mapping model";
    auto assetClient = DependencyManager::get<AssetClient>();
    auto request = assetClient->createGetAllMappingsRequest();

    if (request) {
        connect(request, &GetAllMappingsRequest::finished, this, [this](GetAllMappingsRequest* request) mutable {
            if (request->getError() == MappingRequest::NoError) {
                auto mappings = request->getMappings();
                auto existingPaths = _pathToItemMap.keys();
                for (auto& mapping : mappings) {
                    auto& path = mapping.first;
                    auto parts = path.split("/");
                    auto length = parts.length();

                    existingPaths.removeOne(mapping.first);

                    QString fullPath = "/";

                    QStandardItem* lastItem = nullptr;

                    // start index at 1 to avoid empty string from leading slash
                    for (int i = 1; i < length; ++i) {
                        fullPath += (i == 1 ? "" : "/") + parts[i];

                        auto it = _pathToItemMap.find(fullPath);
                        if (it == _pathToItemMap.end()) {
                            qDebug() << "prefix not found: " << fullPath;
                            auto item = new QStandardItem(parts[i]);
                            bool isFolder = i < length - 1;
                            item->setData(isFolder ? fullPath + "/" : fullPath, Qt::UserRole);
                            item->setData(isFolder, Qt::UserRole + 1);
                            item->setData(parts[i], Qt::UserRole + 2);
                            item->setData("atp:" + fullPath, Qt::UserRole + 3);
                            if (lastItem) {
                                lastItem->setChild(lastItem->rowCount(), 0, item);
                            } else {
                                appendRow(item);
                            }

                            lastItem = item;
                            _pathToItemMap[fullPath] = lastItem;
                        }
                        else {
                            lastItem = it.value();
                        }
                    }

                    Q_ASSERT(fullPath == path);
                }

                // Remove folders from list
                auto it = existingPaths.begin();
                while (it != existingPaths.end()) {
                    auto item = _pathToItemMap[*it];
                    if (item->data(Qt::UserRole + 1).toBool()) {
                        it = existingPaths.erase(it);
                    } else {
                        ++it;
                    }
                }

                for (auto& path : existingPaths) {
                    Q_ASSERT(_pathToItemMap.contains(path));
                    qDebug() << "removing existing: " << path;

                    auto item = _pathToItemMap[path];

                    while (item) {
                        // During each iteration, delete item
                        QStandardItem* nextItem = nullptr;

                        auto parent = item->parent();
                        if (parent) {
                            parent->removeRow(item->row());
                            if (parent->rowCount() > 0) {
                                // The parent still contains children, set the nextItem to null so we stop processing
                                nextItem = nullptr;
                            } else {
                                nextItem = parent;
                            }
                        } else {
                            removeRow(item->row());
                        }
                        
                        _pathToItemMap.remove(path);
                        //delete item;
                        
                        item = nextItem;
                    }
                    //removeitem->index();
                }
            } else {
                emit errorGettingMappings(uint8_t(request->getError()));
            }
        });

        request->start();
    } else {
        qDebug() << "NO CONNECTED ASSET SERVER";
        // not connected to an Asset Server, emit network error
        emit errorGettingMappings(uint8_t(MappingRequest::NetworkError));
    }
}