var api = require('express').Router();
var mysql = require('mysql');
// var client = mysql.createConnection({
//     host: '172.24.13.5',
//     user: 'root',
//     password: 'root123',
//     database: 'mybookmarks',
//     multipleStatements: true,
//     port: 3306
// });
var client = mysql.createConnection({
    host: '127.0.0.1',
    user: 'lcq',
    password: '123456',
    database: 'mybookmarks',
    multipleStatements: true,
    port: 3306
});
client.connect();

api.get('/bookmarks', function(req, res) {
    console.log('hello bookmarks', JSON.stringify(req.query));
    if (req.query.show === 'navigate') {
        var sql = "SELECT t.id as tag_id, t.name as tag_name, b.* FROM `tags` as t LEFT OUTER JOIN tags_bookmarks as tb ON t.id = tb.tag_id LEFT OUTER JOIN bookmarks as b ON tb.bookmark_id = b.id ORDER BY t.id ASC, b.click_count DESC";
        client.query(sql, function(error, result, fields) {
            var data = [];
            var tag = {
                id: result && result[0] && result[0].tag_id,
                name: result && result[0] && result[0].tag_name,
                bookmarks: []
            };
            result.forEach(function(bookmark) {
                if (tag.id !== bookmark.tag_id) {
                    data.push({
                        id: tag.id,
                        name: tag.name,
                        bookmarks: tag.bookmarks
                    });
                    tag.id = bookmark.tag_id;
                    tag.name = bookmark.tag_name;
                    tag.bookmarks = [];
                }
                tag.bookmarks.push(bookmark);
            });
            if (result && result.length > 0) {
                data.push(tag);
            }
            res.json(data);
        })
    } else {
        var sqlBookmarks = "SELECT id, user_id, title, description, url, public, click_count, DATE_FORMAT(created_at, '%Y-%m-%d') as created_at,  DATE_FORMAT(last_click, '%Y-%m-%d') as last_click FROM `bookmarks` WHERE user_id='1' ORDER BY click_count DESC, created_at DESC LIMIT 0, 50";
        var sqlTags = "SELECT id, name FROM `tags` WHERE user_id='1'";

        client.query(sqlBookmarks, function(error, result1, fields) {
            if (error) {
                res.json({
                    error: "数据查询出错"
                });
            } else {
                var bookmark_ids = ''
                result1.forEach(function(bookmark) {
                    bookmark_ids += "'" + bookmark.id + "',";
                })
                bookmark_ids = bookmark_ids.slice(0, bookmark_ids.length - 1);

                var sqlTagIdBookmarkId = "SELECT * FROM `tags_bookmarks` WHERE bookmark_id in(" + bookmark_ids + ")";
                client.query(sqlTagIdBookmarkId, function(error, result2, fields) {
                    // console.log(result2);
                    if (error) {
                        res.json({
                            error: "数据查询出错"
                        });
                    } else {
                        client.query(sqlTags, function(error, result3, fields) {
                            // console.log(result3);
                            if (error) {
                                res.json({
                                    error: "数据查询出错"
                                });
                            } else {
                                var data = [];
                                result1.forEach(function(bookmark) {
                                    var tags = [];
                                    result2.forEach(function(bookmark_tag) {
                                        if (bookmark_tag.bookmark_id == bookmark.id) {
                                            result3.forEach(function(tag) {
                                                if (bookmark_tag.tag_id == tag.id) {
                                                    tags.push(tag)
                                                }
                                            })
                                        }
                                    });
                                    bookmark.tags = tags;
                                    data.push(bookmark);
                                })
                                res.json(data);
                            }
                        });
                    }
                });
            }
        });
    }
});

api.get('/tags', function(req, res) {
    console.log('hello tags', JSON.stringify(req.query));
    var user_id = req.query.user_id;
    var sql = "SELECT id, name FROM `tags` WHERE `user_id` = '" + user_id + "'"
    client.query(sql, function(error, result, fields) {
        if (error) {
            res.json({
                error: 'error tags'
            });
        } else {
            res.json(result);
        }
    })
});

api.post('/addBookmark', function(req, res) {
    console.log('hello addBookmark', JSON.stringify(req.query), JSON.stringify(req.body));
    res.json({
        a: 'i love this world, too!'
    });
});

api.post('/addTags', function(req, res) {
    console.log('hello addTags', JSON.stringify(req.query), JSON.stringify(req.body));
    res.json({
        a: 'i love this world, too!'
    });
});
// client.end();

module.exports = api;