package models

import (
	"errors"
	"fmt"
	"reflect"
	"strings"
	"time"

	"github.com/astaxie/beego/orm"
)

type Question struct {
	Id                   int       `orm:"column(id);pk"`
	Title                string    `orm:"column(title);size(30)" description:"标题"`
	Content              string    `orm:"column(content)" description:"内容"`
	Uid                  int64     `orm:"column(uid)" description:"用户ID"`
	CreateTime           time.Time `orm:"column(createTime);type(timestamp);auto_now_add"`
	Way                  int       `orm:"column(way)" description:"提问方式（0语音，1图文）"`
	PageView             int       `orm:"column(pageView)" description:"浏览总数"`
	CommentTotal         int       `orm:"column(commentTotal)" description:"评论总数"`
	SympathyTotal        int       `orm:"column(sympathyTotal)" description:"同感总数"`
	Review               int       `orm:"column(review)" description:"0 待审核 1已审核"`
	Status               int       `orm:"column(status);null" description:"状态 0 未解决  1已解决"`
	UpdateTime           time.Time `orm:"column(updateTime);type(timestamp);null"`
	ScoreAnalyze         int       `orm:"column(scoreAnalyze);null" description:"分析评分"`
	ScoreAsk             int       `orm:"column(scoreAsk);null" description:"提问评分"`
	ScoreScheme          int       `orm:"column(scoreScheme);null" description:"方案评分"`
	Published            int       `orm:"column(published);null" description:"公开状态 0未公开、1本部门公开、2本公司公开"`
	Level                int       `orm:"column(level)" description:"最后评分或审核人的级别"`
	CheckUid             int64     `orm:"column(checkUid);null" description:"审核人ID"`
	Enabled              int       `orm:"column(enabled);null" description:"1有效 0删除"`
	Tlevel               int       `orm:"column(tlevel)" description:"公开操作权限"`
	PfUid                int64     `orm:"column(pfUid)"`
	QType                int       `orm:"column(qType)"`
	SoluteTime           time.Time `orm:"column(soluteTime);type(timestamp);auto_now_add"`
	ResolverTime         time.Time `orm:"column(resolverTime);type(timestamp);auto_now_add"`
	Resolver             int64     `orm:"column(resolver)"`
	RelevantDepartmentId int       `orm:"column(relevantDepartmentId)" description:"相关部门id"`
	ReceiveStatus        int8      `orm:"column(receiveStatus)" description:"领取状态 0未领取 1已领取"`
}

func (t *Question) TableName() string {
	return "question"
}

func init() {
	orm.RegisterModel(new(Question))
}

// AddQuestion insert a new Question into database and returns
// last inserted Id on success.
func AddQuestion(m *Question) (id int64, err error) {
	o := orm.NewOrm()
	id, err = o.Insert(m)
	return
}

// GetQuestionById retrieves Question by Id. Returns error if
// Id doesn't exist
func GetQuestionById(id int) (v *Question, err error) {
	o := orm.NewOrm()
	v = &Question{Id: id}
	if err = o.Read(v); err == nil {
		return v, nil
	}
	return nil, err
}

// GetAllQuestion retrieves all Question matches certain condition. Returns empty list if
// no records exist
func GetAllQuestion(query map[string]string, fields []string, sortby []string, order []string,
	offset int64, limit int64) (ml []interface{}, err error) {
	o := orm.NewOrm()
	qs := o.QueryTable(new(Question))
	// query k=v
	for k, v := range query {
		// rewrite dot-notation to Object__Attribute
		k = strings.Replace(k, ".", "__", -1)
		if strings.Contains(k, "isnull") {
			qs = qs.Filter(k, (v == "true" || v == "1"))
		} else {
			qs = qs.Filter(k, v)
		}
	}
	// order by:
	var sortFields []string
	if len(sortby) != 0 {
		if len(sortby) == len(order) {
			// 1) for each sort field, there is an associated order
			for i, v := range sortby {
				orderby := ""
				if order[i] == "desc" {
					orderby = "-" + v
				} else if order[i] == "asc" {
					orderby = v
				} else {
					return nil, errors.New("Error: Invalid order. Must be either [asc|desc]")
				}
				sortFields = append(sortFields, orderby)
			}
			qs = qs.OrderBy(sortFields...)
		} else if len(sortby) != len(order) && len(order) == 1 {
			// 2) there is exactly one order, all the sorted fields will be sorted by this order
			for _, v := range sortby {
				orderby := ""
				if order[0] == "desc" {
					orderby = "-" + v
				} else if order[0] == "asc" {
					orderby = v
				} else {
					return nil, errors.New("Error: Invalid order. Must be either [asc|desc]")
				}
				sortFields = append(sortFields, orderby)
			}
		} else if len(sortby) != len(order) && len(order) != 1 {
			return nil, errors.New("Error: 'sortby', 'order' sizes mismatch or 'order' size is not 1")
		}
	} else {
		if len(order) != 0 {
			return nil, errors.New("Error: unused 'order' fields")
		}
	}

	var l []Question
	qs = qs.OrderBy(sortFields...)
	if _, err = qs.Limit(limit, offset).All(&l, fields...); err == nil {
		if len(fields) == 0 {
			for _, v := range l {
				ml = append(ml, v)
			}
		} else {
			// trim unused fields
			for _, v := range l {
				m := make(map[string]interface{})
				val := reflect.ValueOf(v)
				for _, fname := range fields {
					m[fname] = val.FieldByName(fname).Interface()
				}
				ml = append(ml, m)
			}
		}
		return ml, nil
	}
	return nil, err
}

// UpdateQuestion updates Question by Id and returns error if
// the record to be updated doesn't exist
func UpdateQuestionById(m *Question) (err error) {
	o := orm.NewOrm()
	v := Question{Id: m.Id}
	// ascertain id exists in the database
	if err = o.Read(&v); err == nil {
		var num int64
		if num, err = o.Update(m); err == nil {
			fmt.Println("Number of records updated in database:", num)
		}
	}
	return
}

// DeleteQuestion deletes Question by Id and returns error if
// the record to be deleted doesn't exist
func DeleteQuestion(id int) (err error) {
	o := orm.NewOrm()
	v := Question{Id: id}
	// ascertain id exists in the database
	if err = o.Read(&v); err == nil {
		var num int64
		if num, err = o.Delete(&Question{Id: id}); err == nil {
			fmt.Println("Number of records deleted in database:", num)
		}
	}
	return
}