/*
 * Copyright 2019 Jeremy Jamet / Kunzisoft.
 *     
 * This file is part of KeePassDX.
 *
 *  KeePassDX is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  KeePassDX is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with KeePassDX.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
package com.kunzisoft.keepass.database.action.node

import android.content.Context
import com.kunzisoft.keepass.database.ContextualDatabase
import com.kunzisoft.keepass.database.element.Entry
import com.kunzisoft.keepass.hardware.HardwareKey

class UpdateEntryRunnable(
    context: Context,
    database: ContextualDatabase,
    private val mOldEntry: Entry,
    private val mNewEntry: Entry,
    save: Boolean,
    afterActionNodesFinish: AfterActionNodesFinish?,
    challengeResponseRetriever: (HardwareKey, ByteArray?) -> ByteArray
) : ActionNodeDatabaseRunnable(context, database, afterActionNodesFinish, save, challengeResponseRetriever) {

    override fun nodeAction() {
        if (mOldEntry.nodeId == mNewEntry.nodeId) {
            // WARNING : Re attribute parent removed in entry edit activity to save memory
            mNewEntry.addParentFrom(mOldEntry)

            // Re-attribute history removed to save memory in Bundle creation
            // Clear to be sure
            mNewEntry.clearHistory()
            mOldEntry.getHistory().forEach {
                mNewEntry.addEntryToHistory(it)
            }

            // Build oldest attachments
            val oldEntryAttachments = mOldEntry.getAttachments(database.attachmentPool, true)
            val newEntryAttachments = mNewEntry.getAttachments(database.attachmentPool, true)
            val attachmentsToRemove = oldEntryAttachments.toMutableList()
            // Not use equals because only check name
            newEntryAttachments.forEach { newAttachment ->
                oldEntryAttachments.forEach { oldAttachment ->
                    if (oldAttachment.name == newAttachment.name
                        && oldAttachment.binaryData == newAttachment.binaryData
                    )
                        attachmentsToRemove.remove(oldAttachment)
                }
            }

            // Update entry with new values
            mNewEntry.touch(modified = true, touchParents = true)

            // Create an entry history (an entry history don't have history)
            mNewEntry.addEntryToHistory(Entry(mOldEntry, copyHistory = false))
            database.removeOldestEntryHistory(mNewEntry, database.attachmentPool)

            // Only change data in index
            database.updateEntry(mNewEntry)

            // Remove oldest attachments
            attachmentsToRemove.forEach {
                database.removeAttachmentIfNotUsed(it)
            }
        }
    }

    override fun nodeFinish(): ActionNodesValues {
        if (!result.isSuccess) {
            // If we fail to save, back out changes to global structure
            database.updateEntry(mOldEntry)
        }
        return ActionNodesValues(listOf(mOldEntry), listOf(mNewEntry))
    }
}
