package data

import (
	"database/sql"
	"time"

	"git.fuyu.moe/5GPowerQuality/parser/internal/model"
	"git.ultraware.nl/NiseVoid/qb"
	"git.ultraware.nl/NiseVoid/qb/qc"
	"git.ultraware.nl/NiseVoid/qb/qf"
)

// GetMeterID gets the meter ID, if there is none yet a new record is add to meter
func GetMeterID(source Source, meterID string) (id int) {
	me := model.Meter()
	q := me.Select(me.ID).
		Where(
			qc.Eq(me.UID, meterID),
			qc.Eq(me.Source, source),
		)

	err := db.QueryRow(q).Scan(&id)
	switch err {
	case nil:
	case sql.ErrNoRows:
		iq := me.Insert(me.Name, me.UID, me.Source).
			Values(``, meterID, source)

		err = db.QueryRow(qb.Returning(iq, me.ID)).Scan(&id)
		if err != nil {
			panic(err)
		}
	default:
		panic(err)
	}

	return
}

// GetStartDate gets the last measurement date
func GetStartDate(source Source) time.Time {
	m, me := model.Measurement(), model.Meter()

	q := m.Select(qf.Max(m.Time)).
		InnerJoin(me.ID, m.MeterID).
		Where(qc.Eq(me.Source, source))

	var t *time.Time
	err := db.QueryRow(q).Scan(&t)
	if (err == nil && t == nil) || err == sql.ErrNoRows {
		return time.Date(2018, 4, 1, 0, 0, 0, 0, time.Local)
	}
	if err != nil {
		panic(err)
	}

	*t = t.Add(time.Second)

	return *t
}

func InsertSets(sets Sets) {
	if len(sets) == 0 {
		return
	}

	m := model.Measurement()
	q := m.Insert(m.Time, m.MeterID,
		m.CGem1, m.CGem2, m.CGem3, m.CGemN,
		m.Ep1, m.Ep2, m.Ep3,
		m.IGem1, m.IGem2, m.IGem3, m.IGemN,
		m.IMax1, m.IMax2, m.IMax3,
		m.PMax1, m.PMax2, m.PMax3,
		m.SMax1, m.SMax2, m.SMax3,
		m.UGem1, m.UGem2, m.UGem3, m.UGemN,
		m.BGem1, m.BGem2, m.BGem3, m.BGemN,
		m.SGem1, m.SGem2, m.SGem3, m.SGemN,
		m.PGem1, m.PGem2, m.PGem3, m.PGemN,
		m.Ithd1, m.Ithd2, m.Ithd3, m.IthdN,
		m.Uthd1, m.Uthd2, m.Uthd3, m.UthdN,
		m.Freq,
	)

	for k, v := range sets {
		q.Values(k.Time, k.Meter,
			v[`CGem1`], v[`CGem2`], v[`CGem3`], ifExists(v, `CGemN`),
			v[`EP1`], v[`EP2`], v[`EP3`],
			v[`IGem1`], v[`IGem2`], v[`IGem3`], ifExists(v, `IGemN`),
			v[`IMax1`], v[`IMax2`], v[`IMax3`],
			v[`PMax1`], v[`PMax2`], v[`PMax3`],
			v[`SMax1`], v[`SMax2`], v[`SMax3`],
			v[`UGem1`], v[`UGem2`], v[`UGem3`], ifExists(v, `UGemN`),
			v[`BGem1`], v[`BGem2`], v[`BGem3`], ifExists(v, `BGemN`),
			v[`SGem1`], v[`SGem2`], v[`SGem3`], ifExists(v, `SGemN`),
			v[`PGem1`], v[`PGem2`], v[`PGem3`], ifExists(v, `PGemN`),
			v[`ITHD1`], v[`ITHD2`], v[`ITHD3`], ifExists(v, `ITHDN`),
			v[`UTHD1`], v[`UTHD2`], v[`UTHD3`], ifExists(v, `UTHDN`),
			v[`FREQ`],
		)
	}

	err := db.Exec(q)
	if err != nil {
		panic(err)
	}
}

func ifExists(set Set, k string) interface{} {
	v, ok := set[k]
	if !ok {
		return nil
	}

	return v
}