const dbconn_OBSOLETE = require('../config/dbconn') // DO NOT USE THIS FOR NEW FUNCTIONS
const dbconn = require('../config/dbconn2')

var methods = {
    // ===================== user db =====================
    registerNewUser: function(data, callback) {
        dbconn_OBSOLETE.user.beginTransaction(function(err) { // START TRANSACTION
            if (err) {
                throw err
            }
            // insert profile
            dbconn_OBSOLETE.user.query('INSERT INTO user SET ?', data.profile, function (err, results, fields) {
                if (err) {
                  return dbconn_OBSOLETE.user.rollback(function() {
                    throw err
                  });
                }
                var newUserId = results.insertId
                // set password
                var credentialData = {
                    user_id: newUserId,
                    password: data.password
                }
                dbconn_OBSOLETE.user.query('INSERT INTO credential SET ?', credentialData, function (err, results, fields) {
                    if (err) {
                        return dbconn_OBSOLETE.user.rollback(function() {
                            throw err
                        });
                    }
                    // set default user-project-role
                    var projectRoleData = {
                        project_id: 1,  //M4_LAB
                        role_id: 2,     // USER
                        user_id: newUserId
                    }
                    dbconn_OBSOLETE.user.query('INSERT INTO user_project_role SET ?', projectRoleData, function (err, results, fields) {
                        if (err) {
                            return dbconn_OBSOLETE.user.rollback(function() {
                                throw err
                            });
                        }
                        // MLAB-129: INSERT verification token
                        let verificationData = {
                            user_id: newUserId,
                            token: data.verificationToken
                        }
                        dbconn_OBSOLETE.user.query('INSERT INTO verification SET ?', verificationData, function (err, results, fields) {
                            if (err) {
                                return dbconn_OBSOLETE.user.rollback(function() {
                                    throw err
                                });
                            }
                            // COMMIT
                            dbconn_OBSOLETE.user.commit(function(err) {
                                if (err) {
                                    return dbconn_OBSOLETE.user.rollback(function() {
                                        throw err
                                    })
                                }
                            })
                        })
                    })
                });
            });
            callback(err)
        })
    },
    getUserByEmail: async function(email) {
        try {
            let rows = await dbconn.user.promise().query('SELECT id, verificationStatus, salutation, title, firstname, lastname, industry, organisation, speciality, m4lab_idp FROM user WHERE email = "' +email+'"')
            return rows[0][0]
        } catch (err) {
            console.error(err)
        }
        return null
    },
    getUserEmailById: async function(userId) {
        try {
            let rows = await dbconn.user.promise().query('SELECT email FROM user WHERE id = ' +userId)
            if (rows[0]) {
                return rows[0][0].email
            }
            else { return null }
        } catch (err) {
            console.error(err)
        }
        return null
    },
    checkUserEmail: async function(email) {
        try {
            let rows = await dbconn.user.promise().query('SELECT id, email FROM user WHERE email = "' +email+'"')
            if (rows[0]) {
                return rows[0][0]
            }
            else { return null }
        } catch (err) {
            console.error(err)
        }
        return null
    },
    getUserByToken: async function(token) {
        try {
            let rows = await dbconn.user.promise().query('SELECT t1.user_id, t2.email FROM userdb.credential AS t1 INNER JOIN userdb.user AS t2 ON t1.user_id = t2.id AND t1.resetPasswordToken = "'
                +token+'" and resetPasswordExpires > '+Date.now())
            if (rows[0]) {
                return rows[0][0]
            }
            else { return null }
        } catch (err) {
            console.error(err)
        }
        return null
    },
	updateUserById: function(userData, callback) {
		dbconn_OBSOLETE.user.query('UPDATE user SET ? WHERE id = ' +userData.id, userData, function (err, rows, fields) {
            if (err) throw err
            callback(err)
        })
    },
    updateCredential: function(data, callback) {
        dbconn_OBSOLETE.user.query('UPDATE credential SET ? WHERE user_id = ' +data.user_id, data, function (err, rows, fields) {
            if (err) throw err
            callback(err)
        })
    },
    getUserIdByEmail_OBSOLETE: function(email, callback) {
        let userId
        dbconn_OBSOLETE.user.query('SELECT id FROM user WHERE email = "' +email+'"', function (err, rows, fields) {
            if (err) {
                throw err
            }
            else {
                if ( rows.length > 0) {
                    userId = rows[0].id
                }
            }
            callback(userId, err)
        });
    },
    getUserProjectRole_OBSOLETE: function(userId, callback) {
        dbconn_OBSOLETE.user.query('SELECT project_id, role_id FROM user_project_role WHERE user_id = "' +userId+'"', function (err, rows, fields) {
            if (err) throw err
            callback(rows, err)
        });
    },
    addUserProjectRole: function(data, callback) {
        dbconn_OBSOLETE.user.query('INSERT INTO user_project_role SET ?', data, function (err, results, fields){
            if (err) throw err
            callback(err)
        })
    },
    getVerificationTokenByUserId: async function(userId) {
        try {
            let rows = await dbconn.user.promise().query('SELECT token FROM verification WHERE user_id = "' +userId+'"')
            if (rows[0]) {
                return rows[0][0].token
            }
            else { return null }
        } catch (err) {
            console.error(err)
        }
        return null
    },
    getUserIdByVerificationToken: async function(token) {
        try {
            let rows = await dbconn.user.promise().query('SELECT user_id FROM verification WHERE token = "' +token+'"')
            if (rows[0]) {
                return rows[0][0].user_id
            }
            else {
                return null
            }
        } catch (err) {
            console.error(err)
        }
        return null
    },
    verifyUserAccount: function(userData, callback) {
        dbconn_OBSOLETE.user.beginTransaction(function(err) { // START TRANSACTION
            if (err) { throw err }
            // update user status
            dbconn_OBSOLETE.user.query('UPDATE user SET ? WHERE id =' +userData.id, userData, function (err, rows, fields) {
                if (err) {
                    return dbconn_OBSOLETE.user.rollback(function() { throw err })
                }
                // delete verification token
                dbconn_OBSOLETE.user.query('DELETE FROM verification WHERE user_id = '+userData.id, function (err, rows, fields) {
                    if (err) {
                        return dbconn_OBSOLETE.user.rollback(function() { throw err })
                    }
                    // COMMIT
                    dbconn_OBSOLETE.user.commit(function(err) {
                        if (err) {
                            return dbconn_OBSOLETE.user.rollback(function() { throw err })
                        }
                    })
                })
            })
            callback(err)
        })
    },
    /* ===== GitLab ===== */
    getGitlabId: async function(userId) {
        try {
            let rows = await dbconn.user.promise().query('SELECT gu.gitlab_userId FROM user_gitlab gu, user u WHERE u.id = "' +userId+'" and gu.user_id = u.id')
            if (rows[0][0]) {
                return rows[0][0].gitlab_userId
            } else {
                return null
            }
        }
        catch(err) {
            console.error(err)
            return err
        }
    },
    addGitlabUser: function(data, callback){
        dbconn_OBSOLETE.user.query('INSERT INTO user_gitlab SET ?', data, function (err) {
            if (err) throw err
            callback(err)
        })
    }
};

module.exports = methods;