package repository

import (
    "fmt"
    "time"
    "xorm.io/xorm"
    "xps/pkg/common"
    "xps/pkg/system/datamodel"
    "xps/pkg/system/viewmodel"
)

type MsgRepo struct {
    engine *xorm.Engine
}

func NewMsgRepo(engine *xorm.Engine) *MsgRepo {
    return &MsgRepo{
        engine: engine,
    }
}

func (d *MsgRepo) GetPage(m map[string]interface{}) (*common.PageResult, error) {
    limit := m["limit"].(int)
    page := m["page"].(int)

    sqlSelect := `    SELECT      M.oc_id,
                                    M.msg_id,
                                    M.msg_fr_id,
                                    A.account_name      AS msg_fr_name,
                                    A.account_real_name AS msg_fr_real_name,
                                    A.account_avatar    AS msg_fr_avatar,
                                    M.msg_to_group,
                                    M.msg_cc,
                                    M.msg_to,
                                    M.msg_content,
                                    M.msg_detail,
                                    M.msg_cat_id,
                                    MC.msg_cat_title,
                                    MC.is_link,
                                    MC.msg_cat_link,
                                    MC.msg_cat_link_params,
                                    M.msg_params,
                                    MC.is_detailed,
                                    M.status,
                                    M.msg_time       `
    sqlFrom := `    FROM        msg       AS M
                        LEFT JOIN   account   AS A  ON (M.oc_id       = A.oc_id AND M.msg_fr_id = A.account_id)
                        LEFT JOIN   msg_to    AS B  ON (M.oc_id       = B.oc_id AND M.msg_id    = B.msg_id AND B.msg_to_id=#{msgToCc, jdbcType=BIGINT})
                        LEFT JOIN   msg_cc    AS C  ON (M.oc_id       = C.oc_id AND M.msg_id    = C.msg_id AND C.msg_cc_id=#{msgToCc, jdbcType=BIGINT})
                        LEFT JOIN   msg_cat   AS MC ON (MC.msg_cat_id = M.msg_cat_id)  `
    sqlWhere := `    WHERE  A.deleted_flag = 0 `
    if ocId, ok := m["ocId"]; ok {
        sqlWhere += fmt.Sprintf(" AND M.oc_id = %d", ocId)
    }
    if msgFrId, ok := m["msgFrId"]; ok {
        sqlWhere += fmt.Sprintf(" AND M.msg_fr_id = %d ", msgFrId)
    }
    if msgToCc, ok := m["msgToCc"]; ok {
        sqlWhere += `
            AND (
                EXISTS (
                    SELECT 1 FROM msg_to TT
                    WHERE M.oc_id = TT.oc_id AND M.msg_id = TT.msg_id AND TT.msg_to_id = ` + fmt.Sprintf("%d", msgToCc)
        sqlWhere += `
                ) OR
                EXISTS (
                    SELECT 1 FROM msg_cc CC
                    WHERE M.oc_id = CC.oc_id AND M.msg_id = CC.msg_id AND CC.msg_cc_id = ` + fmt.Sprintf("%d", msgToCc)
        sqlWhere += `
                )
            ) `
    }

    sqlCount := ` SELECT COUNT(*)            `
    total, err1 := d.engine.SQL(sqlCount + sqlFrom + sqlWhere).Count(new(datamodel.Msg))
    if err1 != nil {
        return nil, err1
    }

    sqlOrderBy := " BY M.created_at DESC "
    pageStart := (page - 1) * limit
    sqlLimit := fmt.Sprintf(" LIMIT %d OFFSET %d ", limit, pageStart)

    datalist := make([]datamodel.Msg, 0)
    err2 := d.engine.SQL(sqlSelect + sqlFrom + sqlWhere + sqlOrderBy + sqlLimit).Find(&datalist)
    if err2 != nil {
        return nil, err2
    }

    pageResult := &common.PageResult{}
    pageResult.Data = datalist
    pageResult.Total = total
    pageResult.PageSize = limit
    pageResult.Page = page
    return pageResult, nil
}

func (d *MsgRepo) GetList(m map[string]interface{}) ([]viewmodel.MsgInfo, error) {
    sqlSelect := ` SELECT   M.oc_id,
                            M.msg_id,
                            M.msg_fr_id,
                            A.account_name      AS msg_fr_name,
                            A.account_real_name AS msg_fr_real_name,
                            A.account_avatar    AS msg_fr_avatar,
                            M.msg_to_group,
                            M.msg_cc,
                            M.msg_to,
                            M.msg_content,
                            M.msg_detail,
                            M.msg_cat_id,
                            MC.msg_cat_title,
                            MC.is_link,
                            MC.msg_cat_link,
                            MC.msg_cat_link_params,
                            M.msg_params,
                            MC.is_detailed,
                            M.status,
                            M.msg_time       `
    sqlFrom  := `   FROM      msg       AS M
                    LEFT JOIN account   AS A  ON (M.oc_id       = A.oc_id AND M.msg_fr_id = A.account_id)
                    LEFT JOIN msg_to    AS B  ON (M.oc_id       = B.oc_id AND M.msg_id    = B.msg_id AND B.msg_to_id=#{msgToCc, jdbcType=BIGINT})
                    LEFT JOIN msg_cc    AS C  ON (M.oc_id       = C.oc_id AND M.msg_id    = C.msg_id AND C.msg_cc_id=#{msgToCc, jdbcType=BIGINT})
                    LEFT JOIN msg_cat   AS MC ON (MC.msg_cat_id = M.msg_cat_id)  `
    sqlWhere := `  WHERE  A.deleted_flag = 0 `
    if ocId, ok := m["ocId"]; ok {
        sqlWhere += fmt.Sprintf(" AND M.oc_id = %d", ocId)
    }
    if msgFrId, ok := m["msgFrId"]; ok {
        sqlWhere += fmt.Sprintf(" AND M.msg_fr_id = %d ", msgFrId)
    }
    if msgToCc, ok := m["msgToCc"]; ok {
        sqlWhere += `
            AND (
                EXISTS (
                    SELECT 1 FROM msg_to TT
                    WHERE M.oc_id = TT.oc_id AND M.msg_id = TT.msg_id AND TT.msg_to_id = ` + fmt.Sprintf("%d", msgToCc)
        sqlWhere += `
                ) OR
                EXISTS (
                    SELECT 1 FROM msg_cc CC
                    WHERE M.oc_id = CC.oc_id AND M.msg_id = CC.msg_id AND CC.msg_cc_id = ` + fmt.Sprintf("%d", msgToCc)
        sqlWhere += `
                )
            ) `
    }

    sqlOrderBy := " ORDER BY M.created_at DESC "
    datalist := make([]viewmodel.MsgInfo, 0)
    err := d.engine.SQL(sqlSelect + sqlFrom + sqlWhere + sqlOrderBy).Find(&datalist)
    if err != nil {
        return nil, err
    } else {
        return datalist, nil
    }
}

func (d *MsgRepo) GetById(ocId, msgId int64) (*viewmodel.MsgInfo, error) {
    sqlSelect := ` SELECT   M.oc_id,
                            M.msg_id,
                            M.msg_fr_id,
                            A.account_name      AS msg_fr_name,
                            A.account_real_name AS msg_fr_real_name,
                            A.account_avatar    AS msg_fr_avatar,
                            M.msg_to_group,
                            M.msg_cc,
                            M.msg_to,
                            M.msg_content,
                            M.msg_detail,
                            M.msg_cat_id,
                            MC.msg_cat_title,
                            MC.is_link,
                            MC.msg_cat_link,
                            MC.msg_cat_link_params,
                            M.msg_params,
                            MC.is_detailed,
                            M.status,
                            M.msg_time       `
    sqlFrom   := `  FROM      msg       AS M
                    LEFT JOIN account   AS A  ON (M.oc_id       = A.oc_id AND M.msg_fr_id = A.account_id)
                    LEFT JOIN msg_to    AS B  ON (M.oc_id       = B.oc_id AND M.msg_id    = B.msg_id AND B.msg_to_id=#{msgToCc, jdbcType=BIGINT})
                    LEFT JOIN msg_cc    AS C  ON (M.oc_id       = C.oc_id AND M.msg_id    = C.msg_id AND C.msg_cc_id=#{msgToCc, jdbcType=BIGINT})
                    LEFT JOIN msg_cat   AS MC ON (MC.msg_cat_id = M.msg_cat_id)  `
    sqlWhere := `   WHERE  A.deleted_flag = 0   `
    sqlWhere += fmt.Sprintf(" AND A.oc_id = %d ", ocId)
    sqlWhere += fmt.Sprintf(" AND A.msg_id  = %d ", msgId)
    data := &viewmodel.MsgInfo{}
    has, err := d.engine.SQL(sqlSelect + sqlFrom + sqlWhere).Get(data)
    if !has || err != nil {
        return nil, err
    } else {
        return data, nil
    }
}

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

func (d *MsgRepo) Update(data *datamodel.Msg) error {
    msgCatId := data.MsgId
    data.UpdatedAt = time.Now()
    _, err := d.engine.Where("msg_cat_id = ?", msgCatId).Update(data)
    return err
}

func (d *MsgRepo) Delete(m map[string]interface{}) error {
    ocId := m["ocId"].(int64)
    msgId := m["msgId"].(int64)
    deletedBy := m["deletedBy"].(int64)

    data := &datamodel.Msg{}
    data.DeletedFlag = 1
    data.DeletedBy = deletedBy
    data.DeletedAt = time.Now()
    _, err := d.engine.
        Where("oc_id = ?", ocId).
        Where("msg_id = ?", msgId).
        Update(data)
    return err
}

func (d *MsgRepo) GetUnReadCount(ocId, msgToCc int64) int {
    return 0
}