package repositories

import (
    "errors"
    "fmt"
    "time"
    "xorm.io/xorm"
    "xps/datamodel"
    "xps/viewmodel"
)

type ArtRepo struct {
    engine *xorm.Engine
}

func NewArtRepo(engine *xorm.Engine) *ArtRepo {
    return &ArtRepo{
        engine: engine,
    }
}

func (d *ArtRepo) GetPage(m map[string]interface{}) (*viewmodel.PageResult, error) {
    limit, ok1     := m["limit"].(int)
    page, ok2      := m["page"].(int)
    if !ok1 || !ok2 {
        return nil, errors.New("分页参数不完整")
    }
    
    sqlSelect := ` SELECT A.* ,
                          B.art_cat_title `
    sqlFrom   := ` FROM       art     AS A
                   LEFT  JOIN art_cat AS B ON (A.oc_id = B.oc_id AND A.art_cat_id = B.art_cat_id)
                   LEFT  JOIN account AS C ON (A.oc_id = C.oc_id AND A.editor_id  = C.account_id)  `
    sqlWhere  := ` WHERE A.deleted_flag = 0 `
    if ocId, ok:= m["ocId"]; ok {
        sqlWhere += fmt.Sprintf(" AND A.oc_id = %d ", ocId)
    }
    if status, ok:= m["status"]; ok {
        sqlWhere += fmt.Sprintf(" AND A.status = %d ", status)
    }
    if editorId, ok:= m["editorId"]; ok {
        sqlWhere += fmt.Sprintf(" AND A.editor_id = %d ", editorId)
    }
    nodeLeft, ok1 := m["nodeLeft"]
    nodeRight, ok2 := m["nodeRight"]
    if ok1 && ok2 {
        sqlWhere += fmt.Sprintf(" AND B.node_left >= %d", nodeLeft)
        sqlWhere += fmt.Sprintf(" AND B.node_right <= %d", nodeRight)
    }
    if keywords, ok:= m["keywords"]; ok {
        sqlWhere += " AND A.art_title like '%" + fmt.Sprintf("%s", keywords) + "%'"
    }
    
    sqlCount    := ` SELECT COUNT(*) `
    total, err1 := d.engine.SQL(sqlCount + sqlFrom + sqlWhere).Count(new(datamodel.Art))
    if err1 != nil {
        return nil, err1
    }
    
    sqlOrderBy := " ORDER BY A.issued_at DESC "
    pageStart  := (page - 1) * limit
    sqlLimit   := fmt.Sprintf(" LIMIT %d OFFSET %d ", limit, pageStart)
    
    datalist := make([]datamodel.Art, 0)
    err2 := d.engine.SQL(sqlSelect + sqlFrom + sqlWhere + sqlOrderBy + sqlLimit).Find(&datalist)
    if err2 != nil {
        return nil, err2
    }
    
    pageResult := &viewmodel.PageResult{}
    pageResult.Data     = datalist
    pageResult.Total    = total
    pageResult.PageSize = limit
    pageResult.Page     = page
    return pageResult, nil
}

func (d *ArtRepo) GetList(m map[string]interface{}) ([]viewmodel.ArtInfo, error) {
    sqlSelect := ` SELECT A.* ,
                          B.art_cat_title `
    sqlFrom   := ` FROM       art     AS A
                   LEFT  JOIN art_cat AS B ON (A.oc_id = B.oc_id AND A.art_cat_id = B.art_cat_id)
                   LEFT  JOIN account AS C ON (A.oc_id = C.oc_id AND A.editor_id  = C.account_id)  `
    sqlWhere  := ` WHERE A.deleted_flag = 0 `
    if ocId, ok:= m["ocId"]; ok {
        sqlWhere += fmt.Sprintf(" AND A.oc_id = %d ", ocId)
    }
    if status, ok:= m["status"]; ok {
        sqlWhere += fmt.Sprintf(" AND A.status = %d ", status)
    }
    if editorId, ok:= m["editorId"]; ok {
        sqlWhere += fmt.Sprintf(" AND A.editor_id = %d ", editorId)
    }
    nodeLeft, ok1 := m["nodeLeft"]
    nodeRight, ok2 := m["nodeRight"]
    if ok1 && ok2 {
        sqlWhere += fmt.Sprintf(" AND B.node_left >= %d", nodeLeft)
        sqlWhere += fmt.Sprintf(" AND B.node_right <= %d", nodeRight)
    }
    if keywords, ok:= m["keywords"]; ok {
        sqlWhere += " AND A.art_title like '%" + fmt.Sprintf("%s", keywords) + "%'"
    }
    
    sqlOrderBy := " ORDER BY A.issued_at DESC "
    datalist   := make([]viewmodel.ArtInfo, 0)
    err := d.engine.SQL(sqlSelect + sqlFrom + sqlWhere + sqlOrderBy).Find(&datalist)
    if err != nil {
        return nil, err
    }
    return datalist, nil
}

func (d *ArtRepo) GetById(ocId, artId int64) (*viewmodel.ArtInfo, error) {
    sqlSelect := ` SELECT A.* ,
                          B.art_cat_title `
    sqlFrom   := ` FROM       art     AS A
                   LEFT  JOIN art_cat AS B ON (A.oc_id = B.oc_id AND A.art_cat_id = B.art_cat_id)
                   LEFT  JOIN account AS C ON (A.oc_id = C.oc_id AND A.editor_id  = C.account_id)  `
    sqlWhere  := ` WHERE A.deleted_flag = 0`
    sqlWhere  += fmt.Sprintf(" AND A.oc_id = %d", ocId)
    sqlWhere  += fmt.Sprintf(" AND A.art_id = %d", artId)
    
    data      := &viewmodel.ArtInfo{}
    ok, err   := d.engine.SQL(sqlSelect + sqlFrom + sqlWhere).Limit(1).Get(data)
    if !ok && err == nil {
        return nil, err
    } else {
        return data, nil
    }
}

func (d *ArtRepo) Create(data *datamodel.Art) error {
    data.CreatedAt = time.Now()
    _, err := d.engine.Insert(data)
    return err
}

func (d *ArtRepo) Update(data *datamodel.Art) error {
    artId := data.ArtId
    
    data.UpdatedAt = time.Now()
    _, err := d.engine.Where("art_id = ?", artId).Update(data)
    return err
}

func (d *ArtRepo) Delete(m map[string]interface{}) error {
    artId     := m["artId"].(int64)
    deletedBy := m["deletedBy"].(int64)
    
    data := &datamodel.Art{}
    data.DeletedFlag = 1
    data.DeletedBy = deletedBy
    data.DeletedAt = time.Now()
    _, err := d.engine.Where("art_id = ?", artId).Update(data)
    return err
}