/*
 * 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;


public class SqlNote {
    private static final String TAG = SqlNote.class.getSimpleName();

    private static final int INVALID_ID = -99999;

    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
    };

    public static final int ID_COLUMN = 0;

    // 警报日期列
    public static final int ALERTED_DATE_COLUMN = 1;

    // 背景颜色ID列
    public static final int BG_COLOR_ID_COLUMN = 2;

    // 创建日期列
    public static final int CREATED_DATE_COLUMN = 3;

    // 是否有附件列
    public static final int HAS_ATTACHMENT_COLUMN = 4;

    // 修改日期列
    public static final int MODIFIED_DATE_COLUMN = 5;

    // 注释计数列
    public static final int NOTES_COUNT_COLUMN = 6;

    // 父ID列
    public static final int PARENT_ID_COLUMN = 7;

    // 片段列
    public static final int SNIPPET_COLUMN = 8;

    // 类型列
    public static final int TYPE_COLUMN = 9;

    // 小部件ID列
    public static final int WIDGET_ID_COLUMN = 10;

    // 小部件类型列
    public static final int WIDGET_TYPE_COLUMN = 11;

    // 同步ID列
    public static final int SYNC_ID_COLUMN =12;

    // 本地修改时间列
public static final int LOCAL_MODIFIED_COLUMN = 13;

// 父ID列
    public static final int ORIGIN_PARENT_ID_COLUMN = 14;

// 任务ID列
    public static final int GTASK_ID_COLUMN = 15;

// 版本列
    public static final int VERSION_COLUMN = 16;

// 上下文
    private Context mContext;

// 内容解析器
    private ContentResolver mContentResolver;

// 是否创建
    private boolean mIsCreate;

// ID
    private long mId;

// 警报日期
    private long mAlertDate;

// 背景颜色ID
    private int mBgColorId;
    private long mCreatedDate;

    // 0 = no, 1 = yes
    private int mHasAttachment;

    // 0 = no, 1 = yes
    private long mModifiedDate;

    // parent id
    private long mParentId;

    // 160 characters max
    private String mSnippet;

    // 0 = note, 1 = task, 2 = both
    private int mType;

    // widget id
    private int mWidgetId;

    // widget type
    private int mWidgetType;

    // origin parent id
    private long mOriginParent;

    // version
    private long mVersion;

    private ContentValues mDiffNoteValues;

    // 用于存储SqlData对象的列表
    private ArrayList<SqlData> mDataList;

    // 构造函数，传入上下文
    // 创建SqlNote对象，并初始化
public SqlNote(Context context) {
       mContext = context;
        //获取上下文
        mContentResolver = context.getContentResolver();
        //获取内容解析器
        mIsCreate = true;
        //是否创建
        mId = INVALID_ID;
        //ID
        mAlertDate = 0;
        //警报日期
        mBgColorId = ResourceParser.getDefaultBgId(context);
        //背景颜色ID
        mCreatedDate = System.currentTimeMillis();
        //创建日期
        mHasAttachment = 0;
        //是否有附件
        mModifiedDate = System.currentTimeMillis();
        //修改日期
        mParentId = 0;
        //父ID
        mSnippet = "";
        //摘要
        mType = Notes.TYPE_NOTE;
        //类型
        mWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID;
        //小部件ID
        mWidgetType = Notes.TYPE_WIDGET_INVALIDE;
        //小部件类型
        mOriginParent = 0;
        //来源父
        mVersion = 0;
        //版本
        mDiffNoteValues = new ContentValues();
        mDataList = new ArrayList<SqlData>();
    }
// 创建SqlNote对象，从Cursor中加载数据
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();
    }    

    // 创建SqlNote对象，传入上下文和id
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();

    }

    private void loadFromCursor(long id) {
        Cursor c = null;
        try {
            // 根据id查询Notes表中的数据
            c = mContentResolver.query(Notes.CONTENT_NOTE_URI, PROJECTION_NOTE, "(_id=?)",
                    new String[] {
                        String.valueOf(id)
                    }, null);
            if (c != null) {
                // 将查询到的数据加载到当前对象中
                c.moveToNext();
                loadFromCursor(c);
            } else {
                Log.w(TAG, "loadFromCursor: cursor = null");
            }
        } finally {
            if (c != null)
                c.close();
        }
    }
    private void loadFromCursor(Cursor c) {
        // 从游标中获取ID
        mId = c.getLong(ID_COLUMN);
        // 从游标中获取提示日期
        mAlertDate = c.getLong(ALERTED_DATE_COLUMN);
        // 从游标中获取背景颜色ID
        mBgColorId = c.getInt(BG_COLOR_ID_COLUMN);
        // 从游标中获取创建日期
        mCreatedDate = c.getLong(CREATED_DATE_COLUMN);
        // 从游标中获取是否有附件
        mHasAttachment = c.getInt(HAS_ATTACHMENT_COLUMN);
        // 从游标中获取修改日期
        mModifiedDate = c.getLong(MODIFIED_DATE_COLUMN);
        // 从游标中获取父ID
        mParentId = c.getLong(PARENT_ID_COLUMN);
        // 从游标中获取摘要
        mSnippet = c.getString(SNIPPET_COLUMN);
        // 从游标中获取类型
        mType = c.getInt(TYPE_COLUMN);
        // 从游标中获取小部件ID
        mWidgetId = c.getInt(WIDGET_ID_COLUMN);
        // 从游标中获取小部件类型
        mWidgetType = c.getInt(WIDGET_TYPE_COLUMN);
        // 从游标中获取版本
        mVersion = c.getLong(VERSION_COLUMN);
    }

    private void loadDataContent() {
        Cursor c = null;
        mDataList.clear();
        try {
            // 根据note_id查询数据
            c = mContentResolver.query(Notes.CONTENT_DATA_URI, SqlData.PROJECTION_DATA,
                    "(note_id=?)", new String[] {
                        String.valueOf(mId)
                    }, null);
            if (c != null) {
                // 判断是否有数据
                if (c.getCount() == 0) {
                    Log.w(TAG, "it seems that the note has not data");
                    return;
                }
                // 遍历查询到的数据
                while (c.moveToNext()) {
                    SqlData data = new SqlData(mContext, c);
                    mDataList.add(data);
                }
            } else {
                Log.w(TAG, "loadDataContent: cursor = null");
            }
        } finally {
            if (c != null)
                c.close();
        }
    }

    public boolean setContent(JSONObject js) {
        try {
            // 获取js中的meta_head_note对象
            JSONObject note = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
            // 判断note的类型是否为系统文件夹
            if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_SYSTEM) {
                Log.w(TAG, "cannot set system folder");
            } else if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_FOLDER) {
                // 判断note的类型是否为文件夹
                // for folder we can only update the snnipet and type
                // 获取note中的snippet
                String snippet = note.has(NoteColumns.SNIPPET) ? note
                        .getString(NoteColumns.SNIPPET) : "";
                // 判断是否为创建，或者mSnippet是否与note中的snippet不同
                if (mIsCreate || !mSnippet.equals(snippet)) {
                    // 将mSnippet与note中的snippet进行比较，不同的值放入mDiffNoteValues中
                    mDiffNoteValues.put(NoteColumns.SNIPPET, snippet);
                }
                // 将note中的snippet赋值给mSnippet
                mSnippet = snippet;

                // 获取note中的type
                int type = note.has(NoteColumns.TYPE) ? note.getInt(NoteColumns.TYPE)
                        : Notes.TYPE_NOTE;
                // 判断是否为创建，或者mType是否与note中的type不同
                if (mIsCreate || mType != type) {
                    // 将mType与note中的type进行比较，不同的值放入mDiffNoteValues中
                    mDiffNoteValues.put(NoteColumns.TYPE, type);
                }
                // 将note中的type赋值给mType
                mType = type;
            } else if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_NOTE) {
               // 获取JSONArray类型的dataArray
  JSONArray dataArray = js.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
                // 获取note中的id
                long id = note.has(NoteColumns.ID) ? note.getLong(NoteColumns.ID) : INVALID_ID;
                // 判断是否是创建操作，或者mId和id不相等
                if (mIsCreate || mId != id) {
                    mDiffNoteValues.put(NoteColumns.ID, id);
                }
                mId = id;

                // 获取note中的alertDate
                long alertDate = note.has(NoteColumns.ALERTED_DATE) ? note
                        .getLong(NoteColumns.ALERTED_DATE) : 0;
                // 判断是否是创建操作，或者mAlertDate和alertDate不相等
                if (mIsCreate || mAlertDate != alertDate) {
                    mDiffNoteValues.put(NoteColumns.ALERTED_DATE, alertDate);
                }
                mAlertDate = alertDate;

                // 获取note中的bgColorId
                int bgColorId = note.has(NoteColumns.BG_COLOR_ID) ? note
                        .getInt(NoteColumns.BG_COLOR_ID) : ResourceParser.getDefaultBgId(mContext);
                // 判断是否是创建操作，或者mBgColorId和bgColorId不相等
                if (mIsCreate || mBgColorId != bgColorId) {
                    mDiffNoteValues.put(NoteColumns.BG_COLOR_ID, bgColorId);
                }
                mBgColorId = bgColorId;

                // 获取note中的createDate
                long createDate = note.has(NoteColumns.CREATED_DATE) ? note
                        .getLong(NoteColumns.CREATED_DATE) : System.currentTimeMillis();
                // 判断是否是创建操作，或者mCreatedDate和createDate不相等
                if (mIsCreate || mCreatedDate != createDate) {
                    mDiffNoteValues.put(NoteColumns.CREATED_DATE, createDate);
                }
               mCreatedDate = createDate;

                // 获取是否有附件
                int hasAttachment = note.has(NoteColumns.HAS_ATTACHMENT) ? note
                        .getInt(NoteColumns.HAS_ATTACHMENT) : 0;
                // 如果创建或者有附件改变
                if (mIsCreate || mHasAttachment != hasAttachment) {
                    // 将附件改变添加到不同的值
                    mDiffNoteValues.put(NoteColumns.HAS_ATTACHMENT, hasAttachment);
                }
                mHasAttachment = hasAttachment;

                // 获取修改日期
                long modifiedDate = note.has(NoteColumns.MODIFIED_DATE) ? note
                        .getLong(NoteColumns.MODIFIED_DATE) : System.currentTimeMillis();
                // 如果创建或者修改日期改变
                if (mIsCreate || mModifiedDate != modifiedDate) {
                    // 将修改日期改变添加到不同的值
                    mDiffNoteValues.put(NoteColumns.MODIFIED_DATE, modifiedDate);
                }
                mModifiedDate = modifiedDate;

                // 获取父ID
                long parentId = note.has(NoteColumns.PARENT_ID) ? note
                        .getLong(NoteColumns.PARENT_ID) : 0;
                // 如果创建或者父ID改变
                if (mIsCreate || mParentId != parentId) {
                    // 将父ID改变添加到不同的值
                    mDiffNoteValues.put(NoteColumns.PARENT_ID, parentId);
                }
                mParentId = parentId;

                String snippet = note.has(NoteColumns.SNIPPET) ? note
                        .getString(NoteColumns.SNIPPET) : "";
                // 判断是否创建或者是否修改了摘要
                if (mIsCreate || !mSnippet.equals(snippet)) {
                    mDiffNoteValues.put(NoteColumns.SNIPPET, snippet);
                }
                mSnippet = snippet;

                // 获取类型
                int type = note.has(NoteColumns.TYPE) ? note.getInt(NoteColumns.TYPE)
                        : Notes.TYPE_NOTE;
                // 判断是否创建或者是否修改了类型
                if (mIsCreate || mType != type) {
                    mDiffNoteValues.put(NoteColumns.TYPE, type);
                }
                mType = type;
               // 获取note中的widgetId
    int widgetId = note.has(NoteColumns.WIDGET_ID) ? note.getInt(NoteColumns.WIDGET_ID)
                        : AppWidgetManager.INVALID_APPWIDGET_ID;
                // 如果mIsCreate为true或者mWidgetId不等于widgetId，则将widgetId添加到mDiffNoteValues中
                if (mIsCreate || mWidgetId != widgetId) {
                    mDiffNoteValues.put(NoteColumns.WIDGET_ID, widgetId);
                }
                // 将widgetId赋值给mWidgetId
                mWidgetId = widgetId;

                // 获取note中的widgetType
                int widgetType = note.has(NoteColumns.WIDGET_TYPE) ? note
                        .getInt(NoteColumns.WIDGET_TYPE) : Notes.TYPE_WIDGET_INVALIDE;
                // 如果mIsCreate为true或者mWidgetType不等于widgetType，则将widgetType添加到mDiffNoteValues中
                if (mIsCreate || mWidgetType != widgetType) {
                    mDiffNoteValues.put(NoteColumns.WIDGET_TYPE, widgetType);
                }
                // 将widgetType赋值给mWidgetType
                mWidgetType = widgetType;

                // 获取note中的originParent
                long originParent = note.has(NoteColumns.ORIGIN_PARENT_ID) ? note
                        .getLong(NoteColumns.ORIGIN_PARENT_ID) : 0;
                // 如果mIsCreate为true或者mOriginParent不等于originParent，则将originParent添加到mDiffNoteValues中
                if (mIsCreate || mOriginParent != originParent) {
                    mDiffNoteValues.put(NoteColumns.ORIGIN_PARENT_ID, originParent);
                }
                // 将originParent赋值给mOriginParent
                mOriginParent = originParent;

                // 遍历dataArray中的每一个JSONObject
                for (int i = 0; i < dataArray.length(); i++) {
                    JSONObject data = dataArray.getJSONObject(i);
                    SqlData sqlData = null;
                    // 判断data中是否有ID字段
                    if (data.has(DataColumns.ID)) {
                        // 获取ID字段的值
                        long dataId = data.getLong(DataColumns.ID);
                        // 遍历mDataList中的每一个SqlData
                        for (SqlData temp : mDataList) {
                            // 如果ID字段的值和SqlData的ID值相等
                            if (dataId == temp.getId()) {
                                // 将temp赋值给sqlData
                                sqlData = temp;
                            }
                        }
                    }

                    // 如果sqlData为null，则创建一个新的SqlData
                    if (sqlData == null) {
                        sqlData = new SqlData(mContext);
                        // 将sqlData添加到mDataList中
                        mDataList.add(sqlData);
                    }

                    // 设置SqlData的内容
                    sqlData.setContent(data);
                }
            }
       } catch (JSONException e) {
            Log.e(TAG, e.toString());
            e.printStackTrace();
            return false;
        }
        return true;
    }

   public JSONObject getContent() {
        try {
            JSONObject js = new JSONObject();

            // 检查是否已经创建
            if (mIsCreate) {
                Log.e(TAG, "it seems that we haven't created this in database yet");
                return null;
            }
           // 创建一个JSONObject对象note
  JSONObject note = new JSONObject();
            // 如果mType等于Notes.TYPE_NOTE
            if (mType == Notes.TYPE_NOTE) {
                // 将mId放入note中
                note.put(NoteColumns.ID, mId);
                // 将mAlertDate放入note中
                note.put(NoteColumns.ALERTED_DATE, mAlertDate);
                // 将mBgColorId放入note中
                note.put(NoteColumns.BG_COLOR_ID, mBgColorId);
                // 将mCreatedDate放入note中
                note.put(NoteColumns.CREATED_DATE, mCreatedDate);
                // 将mHasAttachment放入note中
                note.put(NoteColumns.HAS_ATTACHMENT, mHasAttachment);
                // 将mModifiedDate放入note中
                note.put(NoteColumns.MODIFIED_DATE, mModifiedDate);
                // 将mParentId放入note中
                note.put(NoteColumns.PARENT_ID, mParentId);
                // 将mSnippet放入note中
                note.put(NoteColumns.SNIPPET, mSnippet);
                // 将mType放入note中
                note.put(NoteColumns.TYPE, mType);
                // 将mWidgetId放入note中
                note.put(NoteColumns.WIDGET_ID, mWidgetId);
                // 将mWidgetType放入note中
                note.put(NoteColumns.WIDGET_TYPE, mWidgetType);
                // 将mOriginParent放入note中
                note.put(NoteColumns.ORIGIN_PARENT_ID, mOriginParent);
                // 将note放入js中
                js.put(GTaskStringUtils.META_HEAD_NOTE, note);

                // 创建一个JSONArray对象dataArray
                JSONArray dataArray = new JSONArray();
                // 遍历mDataList
                for (SqlData sqlData : mDataList) {
                    // 获取sqlData的content
                    JSONObject data = sqlData.getContent();
                    // 如果data不为空
                    if (data != null) {
                        // 将data放入dataArray中
                        dataArray.put(data);
                    }
                }
                // 将dataArray放入js中
                js.put(GTaskStringUtils.META_HEAD_DATA, dataArray);
            // 如果mType等于Notes.TYPE_FOLDER或者mType等于Notes.TYPE_SYSTEM
            } else if (mType == Notes.TYPE_FOLDER || mType == Notes.TYPE_SYSTEM) {
                // 将mId放入note中
                note.put(NoteColumns.ID, mId);
                // 将mType放入note中
                note.put(NoteColumns.TYPE, mType);
                // 将mSnippet放入note中
                note.put(NoteColumns.SNIPPET, mSnippet);
                // 将note放入js中
                js.put(GTaskStringUtils.META_HEAD_NOTE, note);
            }

           return js;
        } catch (JSONException e) {
            Log.e(TAG, e.toString());
            e.printStackTrace();
        }
        return null;
    }

    // 设置父id
    public void setParentId(long id) {
        mParentId = id;
        mDiffNoteValues.put(NoteColumns.PARENT_ID, id);
    }

    // 设置GtaskId
    public void setGtaskId(String gid) {
        mDiffNoteValues.put(NoteColumns.GTASK_ID, gid);
    }

    // 设置同步id
    public void setSyncId(long syncId) {
        mDiffNoteValues.put(NoteColumns.SYNC_ID, syncId);
    }

    // 重置本地修改时间
    public void resetLocalModified() {
        mDiffNoteValues.put(NoteColumns.LOCAL_MODIFIED, 0);
    }

    // 获取id
    public long getId() {
        return mId;
    }

    //获取父ID
public long getParentId() {
        return mParentId;
    }

    //获取摘要
    public String getSnippet() {
        return mSnippet;
    }

    //判断是否为笔记类型
    public boolean isNoteType() {
        return mType == Notes.TYPE_NOTE;
    }

    //提交
    public void commit(boolean validateVersion) {
        if (mIsCreate) {
            if (mId == INVALID_ID && mDiffNoteValues.containsKey(NoteColumns.ID)) {
                mDiffNoteValues.remove(NoteColumns.ID);
            }

            Uri uri = mContentResolver.insert(Notes.CONTENT_NOTE_URI, mDiffNoteValues);
            try {
                mId = Long.valueOf(uri.getPathSegments().get(1));
            } catch (NumberFormatException e) {
                Log.e(TAG, "Get note id error :" + e.toString());
                throw new ActionFailureException("create note failed");
            }
            if (mId == 0) {
                throw new IllegalStateException("Create thread id failed");
            }

            if (mType == Notes.TYPE_NOTE) {
                for (SqlData sqlData : mDataList) {
                    sqlData.commit(mId, false, -1);
                }
            }
        } else {
            // 检查mId是否有效
            if (mId <= 0 && mId != Notes.ID_ROOT_FOLDER && mId != Notes.ID_CALL_RECORD_FOLDER) {
                Log.e(TAG, "No such note");
                throw new IllegalStateException("Try to update note with invalid id");
            }
            // 检查是否有更新
            if (mDiffNoteValues.size() > 0) {
                // 更新版本号
                mVersion ++;
                int result = 0;
                // 检查是否是同步更新
                if (!validateVersion) {
                    // 更新
                    result = mContentResolver.update(Notes.CONTENT_NOTE_URI, mDiffNoteValues, "("
                            + NoteColumns.ID + "=?)", new String[] {
                        String.valueOf(mId)
                    });
                } else {
                    // 更新
                    result = mContentResolver.update(Notes.CONTENT_NOTE_URI, mDiffNoteValues, "("
                            + NoteColumns.ID + "=?) AND (" + NoteColumns.VERSION + "<=?)",
                            new String[] {
                                    String.valueOf(mId), String.valueOf(mVersion)
                            });
                }
                // 检查是否更新成功
                if (result == 0) {
                    Log.w(TAG, "there is no update. maybe user updates note when syncing");
                }
            }
           // 判断mType是否为Notes.TYPE_NOTE
   if (mType == Notes.TYPE_NOTE) {
                // 遍历mDataList
                for (SqlData sqlData : mDataList) {
                    // 提交数据
                    sqlData.commit(mId, validateVersion, mVersion);
                }
            }
        }

        // refresh local info
        // 从游标中加载数据
        loadFromCursor(mId);
        // 判断mType是否为Notes.TYPE_NOTE
        if (mType == Notes.TYPE_NOTE)
            // 加载数据内容
            loadDataContent();

        // 清除mDiffNoteValues
        mDiffNoteValues.clear();
        // 设置mIsCreate为false
        mIsCreate = false;
    }
}