package influx

import (
	"context"
	"fmt"
	"net/url"
)

// terminal unique
func (client *influxClient) getLast(ctx context.Context, req *Request, limit int) ([]*TV, error) {
	q := fmt.Sprintf("select last(%s) as %s from %s where station='%s' and device='%s';",
		req.Field, req.Field, req.Measure, req.Station, req.Device)
	if limit > 1 {
		q = fmt.Sprintf("select %s from %s where station='%s' and device='%s' order by time desc limit %d;",
			req.Field, req.Measure, req.Station, req.Device, limit)
	}

	reqData := url.Values{
		"db": {req.Database},
		"q":  {q},
	}

	return client.getRespData(ctx, reqData, req.RespType)
}

func (client *influxClient) getPointData(ctx context.Context, req *Request) ([]*TV, error) {
	sql := fmt.Sprintf("select %s from %s where station='%s' and device='%s' and time>=%dms and time<%dms;",
		req.Field, req.Measure, req.Station, req.Device, req.Begin, req.End)

	if req.Operate != "" && req.Step != "" && req.Default != "" {
		sql = fmt.Sprintf("select %s(%s) as %s from %s where station='%s' and device='%s' and time>=%dms and time<%dms group by time(%s) fill(%s);",
			req.Operate, req.Field, req.Field, req.Measure, req.Station, req.Device, req.Begin, req.End, req.Step, req.Default)
	}

	reqData := url.Values{
		"db": {req.Database},
		"q":  {sql},
	}

	return client.getRespData(ctx, reqData, req.RespType)
}

func (client *influxClient) getAfterOne(ctx context.Context, req *Request) ([]*TV, error) {
	reqData := url.Values{
		"db": {req.Database},
		"q": {fmt.Sprintf("select %s from %s where station='%s' and device='%s' and time>=%dms limit 1;",
			req.Field, req.Measure, req.Station, req.Device, req.Begin)},
	}

	return client.getRespData(ctx, reqData, req.RespType)
}

func (client *influxClient) getBeforeOne(ctx context.Context, req *Request) ([]*TV, error) {
	reqData := url.Values{
		"db": {req.Database},
		"q": {fmt.Sprintf("select %s from %s where station='%s' and device='%s' and time<=%dms limit 1;",
			req.Field, req.Measure, req.Station, req.Device, req.End)},
	}

	return client.getRespData(ctx, reqData, req.RespType)
}