/*
 * Copyright (c) 2010 - 2011, The MiCode Open Source Community (www.micode.net)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.micode.notes.gtask.data;

import android.appwidget.AppWidgetManager;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.util.Log;
import net.micode.notes.data.Notes;
import net.micode.notes.data.Notes.DataColumns;
import net.micode.notes.data.Notes.NoteColumns;
import net.micode.notes.gtask.exception.ActionFailureException;
import net.micode.notes.tool.GTaskStringUtils;
import net.micode.notes.tool.ResourceParser;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;

// SqlNote类用于处理与SQL数据库中笔记相关的数据操作，包括创建、读取、更新和提交笔记数据
public class SqlNote {
    // 用于日志记录的标签，简化类名获取
    private static final String TAG = SqlNote.class.getSimpleName();
    // 表示无效的ID值
    private static final int INVALID_ID = -99999;

    // 定义查询笔记时的投影列数组，用于指定要查询的列
    public static final String[] PROJECTION_NOTE = new String[] {
            NoteColumns.ID, NoteColumns.ALERTED_DATE, NoteColumns.BG_COLOR_ID,
            NoteColumns.CREATED_DATE, NoteColumns.HAS_ATTACHMENT, NoteColumns.MODIFIED_DATE,
            NoteColumns.NOTES_COUNT, NoteColumns.PARENT_ID, NoteColumns.SNIPPET, NoteColumns.TYPE,
            NoteColumns.WIDGET_ID, NoteColumns.WIDGET_TYPE, NoteColumns.SYNC_ID,
            NoteColumns.LOCAL_MODIFIED, NoteColumns.ORIGIN_PARENT_ID, NoteColumns.GTASK_ID,
            NoteColumns.VERSION
    };
    // 定义ID列在投影列数组中的索引
    public static final int ID_COLUMN = 0;
    // 定义提醒日期列在投影列数组中的索引
    public static final int ALERTED_DATE_COLUMN = 1;
    // 定义背景颜色ID列在投影列数组中的索引
    public static final int BG_COLOR_ID_COLUMN = 2;
    // 定义创建日期列在投影列数组中的索引
    public static final int CREATED_DATE_COLUMN = 3;
    // 定义是否有附件列在投影列数组中的索引
    public static final int HAS_ATTACHMENT_COLUMN = 4;
    // 定义修改日期列在投影列数组中的索引
    public static final int MODIFIED_DATE_COLUMN = 5;
    // 定义笔记数量列在投影列数组中的索引（根据上下文可能有不同含义）
    public static final int NOTES_COUNT_COLUMN = 6;
    // 定义父ID列在投影列数组中的索引
    public static final int PARENT_ID_COLUMN = 7;
    // 定义片段列在投影列数组中的索引（可能是笔记的简短描述等）
    public static final int SNIPPET_COLUMN = 8;
    // 定义类型列在投影列数组中的索引（如笔记类型、文件夹类型等）
    public static final int TYPE_COLUMN = 9;
    // 定义小部件ID列在投影列数组中的索引
    public static final int WIDGET_ID_COLUMN = 10;
    // 定义小部件类型列在投影列数组中的索引
    public static final int WIDGET_TYPE_COLUMN = 11;
    // 定义同步ID列在投影列数组中的索引
    public static final int SYNC_ID_COLUMN = 12;
    // 定义本地修改列在投影列数组中的索引
    public static final int LOCAL_MODIFIED_COLUMN = 13;
    // 定义原始父ID列在投影列数组中的索引（根据上下文可能有不同用途）
    public static final int ORIGIN_PARENT_ID_COLUMN = 14;
    // 定义GTask ID列在投影列数组中的索引（可能与特定任务系统相关）
    public static final int GTASK_ID_COLUMN = 15;
    // 定义版本列在投影列数组中的索引
    public static final int VERSION_COLUMN = 16;

    // 应用程序上下文
    private Context mContext;
    // 用于与内容提供器进行交互，以访问和操作数据
    private ContentResolver mContentResolver;
    // 表示是否为创建操作
    private boolean mIsCreate;
    // 笔记的ID
    private long mId;
    // 笔记的提醒日期
    private long mAlertDate;
    // 笔记的背景颜色ID
    private int mBgColorId;
    // 笔记的创建日期
    private long mCreatedDate;
    // 表示笔记是否有附件
    private int mHasAttachment;
    // 笔记的修改日期
    private long mModifiedDate;
    // 笔记的父ID
    private long mParentId;
    // 笔记的片段（可能是简短描述等）
    private String mSnippet;
    // 笔记的类型
    private int mType;
    // 笔记关联的小部件ID
    private int mWidgetId;
    // 笔记关联的小部件类型
    private int mWidgetType;
    // 笔记的原始父ID（根据上下文可能有不同用途）
    private long mOriginParent;
    // 笔记的版本号
    private long mVersion;
    // 用于存储要更新的笔记数据值
    private ContentValues mDiffNoteValues;
    // 存储与笔记相关的数据列表（可能是笔记的内容数据等）
    private ArrayList<SqlData> mDataList;

    // 构造函数，用于创建一个新的SqlNote实例，通常用于插入新笔记
    public SqlNote(Context context) {
        mContext = context;
        mContentResolver = context.getContentResolver();
        mIsCreate = true;
        mId = INVALID_ID;
        mAlertDate = 0;
        // 获取默认的背景颜色ID
        mBgColorId = ResourceParser.getDefaultBgId(context);
        mCreatedDate = System.currentTimeMillis();
        mHasAttachment = 0;
        mModifiedDate = System.currentTimeMillis();
        mParentId = 0;
        mSnippet = "";
        mType = Notes.TYPE_NOTE;
        mWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID;
        mWidgetType = Notes.TYPE_WIDGET_INVALIDE;
        mOriginParent = 0;
        mVersion = 0;
        mDiffNoteValues = new ContentValues();
        mDataList = new ArrayList<SqlData>();
    }

    // 构造函数，用于根据数据库游标创建一个SqlNote实例，通常用于读取现有笔记
    public SqlNote(Context context, Cursor c) {
        mContext = context;
        mContentResolver = context.getContentResolver();
        mIsCreate = false;
        loadFromCursor(c);
        mDataList = new ArrayList<SqlData>();
        if (mType == Notes.TYPE_NOTE)
            loadDataContent();
        mDiffNoteValues = new ContentValues();
    }

    // 构造函数，根据指定的ID从数据库加载笔记数据创建SqlNote实例
    public SqlNote(Context context, long id) {
        mContext = context;
        mContentResolver = context.getContentResolver();
        mIsCreate = false;
        loadFromCursor(id);
        mDataList = new ArrayList<SqlData>();
        if (mType == Notes.TYPE_NOTE)
            loadDataContent();
        mDiffNoteValues = new ContentValues();
    }

    // 根据ID从数据库加载笔记数据到当前实例的属性中
    private void loadFromCursor(long id) {
        Cursor c = null;
        try {
            // 查询指定ID的笔记数据
            c = mContentResolver.query(Notes.CONTENT_NOTE_URI, PROJECTION_NOTE, "(_id=?)",
                    new String[] { String.valueOf(id) }, null);
            if (c!= null) {
                c.moveToNext();
                loadFromCursor(c);
            } else {
                Log.w(TAG, "loadFromCursor: cursor = null");
            }
        } finally {
            if (c!= null)
                c.close();
        }
    }

    // 从数据库游标加载笔记数据到当前实例的属性中
    private void loadFromCursor(Cursor c) {
        mId = c.getLong(ID_COLUMN);
        mAlertDate = c.getLong(ALERTED_DATE_COLUMN);
        mBgColorId = c.getInt(BG_COLOR_ID_COLUMN);
        mCreatedDate = c.getLong(CREATED_DATE_COLUMN);
        mHasAttachment = c.getInt(HAS_ATTACHMENT_COLUMN);
        mModifiedDate = c.getLong(MODIFIED_DATE_COLUMN);
        mParentId = c.getLong(PARENT_ID_COLUMN);
        mSnippet = c.getString(SNIPPET_COLUMN);
        mType = c.getInt(TYPE_COLUMN);
        mWidgetId = c.getInt(WIDGET_ID_COLUMN);
        mWidgetType = c.getInt(WIDGET_TYPE_COLUMN);
        mVersion = c.getLong(VERSION_COLUMN);
    }

    // 加载与笔记相关的数据内容（如果笔记类型为普通笔记）
    private void loadDataContent() {
        Cursor c = null;
        mDataList.clear();
        try {
            // 查询与当前笔记ID相关的数据
            c = mContentResolver.query(Notes.CONTENT_DATA_URI, SqlData.PROJECTION_DATA,
                    "(note_id=?)", new String[] { String.valueOf(mId) }, null);
            if (c!= null) {
                if (c.getCount() == 0) {
                    Log.w(TAG, "it seems that the note has not data");
                    return;
                }
                while (c.moveToNext()) {
                    // 根据游标创建SqlData实例并添加到数据列表中
                    SqlData data = new SqlData(mContext, c);
                    mDataList.add(data);
                }
            } else {
                Log.w(TAG, "loadDataContent: cursor = null");
            }
        } finally {
            if (c!= null)
                c.close();
        }
    }

    // 设置笔记内容，根据JSON对象中的数据更新本地笔记数据，并记录数据差异
    public boolean setContent(JSONObject js) {
        try {
            // 从JSON对象中获取笔记的元数据部分
            JSONObject note = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
            if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_SYSTEM) {
                Log.w(TAG, "cannot set system folder");
            } else if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_FOLDER) {
                // 对于文件夹类型，只能更新片段和类型
                String snippet = note.has(NoteColumns.SNIPPET)? note.getString(NoteColumns.SNIPPET) : "";
                if (mIsCreate ||!mSnippet.equals(snippet)) {
                    mDiffNoteValues.put(NoteColumns.SNIPPET, snippet);
                }
                mSnippet = snippet;
                int type = note.has(NoteColumns.TYPE)? note.getInt(NoteColumns.TYPE) : Notes.TYPE_NOTE;
                if (mIsCreate || mType!= type) {
                    mDiffNoteValues.put(NoteColumns.TYPE, type);
                }
                mType = type;
            } else if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_NOTE) {
                // 对于普通笔记类型，更新各种属性和相关数据
                JSONArray dataArray = js.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
                long id = note.has(NoteColumns.ID)? note.getLong(NoteColumns.ID) : INVALID_ID;
                if (mIsCreate || mId!= id) {
                    mDiffNoteValues.put(NoteColumns.ID, id);
                }
                mId = id;
                long alertDate = note.has(NoteColumns.ALERTED_DATE)? note.getLong(NoteColumns.ALERTED_DATE) : 0;
                if (mIsCreate || mAlertDate!= alertDate) {
                    mDiffNoteValues.put(NoteColumns.ALERTED_DATE, alertDate);
                }
                mAlertDate = alertDate;
                int bgColorId = note.has(NoteColumns.BG_COLOR_ID)? note.getInt(NoteColumns.BG_COLOR_ID) : ResourceParser.getDefaultBgId(mContext);
                if (mIsCreate || mBgColorId!= bgColorId) {
                    mDiffNoteValues.put(NoteColumns.BG_COLOR_ID, bgColorId);
                }
                mBgColorId = bgColorId;
                long createDate = note.has(NoteColumns.CREATED_DATE)? note.getLong(NoteColumns.CREATED_DATE) : System.currentTimeMillis();
                if (mIsCreate || mCreatedDate!= createDate) {
                    mDiffNoteValues.put(NoteColumns.CREATED_DATE, createDate);
                }
                mCreatedDate = createDate;
                int hasAttachment = note.has(NoteColumns.HAS_ATTACHMENT)? note.getInt(NoteColumns.HAS_ATTACHMENT) : 0;
                if (mIsCreate || mHasAttachment!= hasAttachment) {
                    mDiffNoteValues.put(NoteColumns.HAS_ATTACHMENT, hasAttachment);
                }
                mHasAttachment = hasAttachment;
                long modifiedDate = note.has(NoteColumns.MODIFIED_DATE)? note.getLong(NoteColumns.MODIFIED_DATE) : System.currentTimeMillis();
                if (mIsCreate || mModifiedDate!= modifiedDate) {
                    mDiffNoteValues.put(NoteColumns.MODIFIED_DATE, modifiedDate);
                }
                mModifiedDate = modifiedDate;
                long parentId = note.has(NoteColumns.PARENT_ID)? note.getLong(NoteColumns.PARENT_ID) : 0;
                if (mIsCreate || mParentId!= parentId) {
                    mDiffNoteValues.put(NoteColumns.PARENT_ID, parentId);
                }
                mParentId = parentId;
                String snippet = note.has(NoteColumns.SNIPPET)? note.getString(NoteColumns.SNIPPET) : "";
                if (mIsCreate ||!mSnippet.equals(snippet)) {
                    mDiffNoteValues.put(NoteColumns.SNIPPET, snippet);
                }
                mSnippet = snippet;
                int type = note.has(NoteColumns.TYPE)? note.getInt(NoteColumns.TYPE) : Notes.TYPE_NOTE;
                if (mIsCreate || mType!= type) {
                    mDiffNoteValues.put(NoteColumns.TYPE, type);
                }
                mType = type;
                int widgetId = note.has(NoteColumns.WIDGET_ID)? note.getInt(NoteColumns.WIDGET_ID) : AppWidgetManager.INVALID_APPWIDGET_ID;
                if (mIsCreate || mWidgetId!= widgetId) {
                    mDiffNoteValues.put(NoteColumns.WIDGET_ID, widgetId);
                }
                mWidgetId = widgetId;
                int widgetType = note.has(NoteColumns.WIDGET_TYPE)? note.getInt(NoteColumns.WIDGET_TYPE) : Notes.TYPE_WIDGET_INVALIDE;
                if (mIsCreate || mWidgetType!= widgetType) {
                    mDiffNoteValues.put(NoteColumns.WIDGET_TYPE, widgetType);
                }
                mWidgetType = widgetType;
                long originParent = note.has(NoteColumns.ORIGIN_PARENT_ID)? note.getLong(NoteColumns.ORIGIN_PARENT_ID) : 0;
                if (mIsCreate || mOriginParent!= originParent) {
                    mDiffNoteValues.put(NoteColumns.ORIGIN_PARENT_ID, originParent);
                }
                mOriginParent = originParent;
                for (int i = 0; i < dataArray.length(); i++) {
                    JSONObject data = dataArray.getJSONObject(i);
                    SqlData sqlData = null;
                    if (data.has(DataColumns.ID)) {
                        long dataId = data.getLong(DataColumns.ID);
                        for (SqlData temp : mDataList) {
                            if (dataId == temp.getId()) {
                                sqlData = temp;
                            }
                        }
                    }
                    if (sqlData == null) {
                        sqlData = new SqlData(mContext);
                        mDataList.add(sqlData);
                    }
                    sqlData.setContent(data);
                }
            }
        } catch (JSONException e) {
            Log.e(TAG, e.toString());
            e.printStackTrace();
            return false;
        }
        return true;
    }

    // 获取笔记内容，以JSON对象形式返回，如果是创建操作则返回null并记录错误日志
    public JSONObject getContent() {
        try {
            JSONObject js = new JSONObject();
            if (mIsCreate) {
                Log.e(TAG, "it seems that we haven't created this in database yet");
                return null;
            }
            JSONObject note = new JSONObject();
            if (mType == Notes.TYPE_NOTE