package postgres

import (
	"context"
	"database/sql"
	"fmt"
	"git.aiterp.net/rpdata/api/database/postgres/psqlcore"
	"git.aiterp.net/rpdata/api/internal/generate"
	"git.aiterp.net/rpdata/api/models"
	"strconv"
	"time"
)

type logRepository struct {
	insertWithIDs bool
	db            *sql.DB
}

func (r *logRepository) Find(ctx context.Context, id string) (*models.Log, error) {
	log, err := psqlcore.New(r.db).SelectLog(ctx, id)
	if err != nil {
		return nil, err
	}

	return r.log(log), nil
}

func (r *logRepository) List(ctx context.Context, filter models.LogFilter) ([]*models.Log, error) {
	q := psqlcore.New(r.db)
	params := psqlcore.SelectLogsParams{
		LimitSize: 0,
	}

	if filter.Search != nil {
		params.FilterSearch = true
		params.Search = TSQueryFromSearch(*filter.Search)
	}
	if filter.Open != nil {
		params.FilterOpen = true
		params.Open = *filter.Open
	}
	if len(filter.Characters) > 0 {
		params.FilterCharacterID = true
		params.CharacterIds = filter.Characters
	}
	if len(filter.Channels) > 0 {
		params.FilterChannelName = true
		params.ChannelNames = filter.Channels
	}
	if len(filter.Events) > 0 {
		params.FilterEventName = true
		params.EventNames = filter.Events
	}
	if filter.MinDate != nil {
		params.FilterEarlistDate = true
		params.EarliestDate = *filter.MinDate
	}
	if filter.MaxDate != nil {
		params.FilterLastestDate = true
		params.LatestDate = *filter.MaxDate
	}
	if filter.Limit > 0 {
		params.LimitSize = int32(filter.Limit)
	}

	logs, err := q.SelectLogs(ctx, params)
	if err != nil {
		return nil, err
	}

	return r.logs(logs), nil
}

func (r *logRepository) Insert(ctx context.Context, log models.Log) (*models.Log, error) {
	tx, err := r.db.BeginTx(ctx, nil)
	if err != nil {
		return nil, err
	}
	defer func() { _ = tx.Rollback() }()
	q := psqlcore.New(tx)

	if !r.insertWithIDs || log.ID == "" {
		log.ID = generate.LogID(log)
	}

	if !r.insertWithIDs || log.ShortID == "" {
		next, err := q.IncrementCounter(ctx, "log_short_id")
		if err != nil {
			return nil, err
		}

		log.ShortID = fmt.Sprintf("L%d", next)
	} else {
		n, err := strconv.Atoi(log.ShortID[1:])
		if err != nil {
			return nil, err
		}

		err = q.BumpCounter(ctx, psqlcore.BumpCounterParams{
			ID:    "log_short_id",
			Value: int32(n),
		})
		if err != nil {
			return nil, err
		}
	}

	if log.CharacterIDs == nil {
		log.CharacterIDs = []string{}
	}

	err = q.InsertLog(ctx, psqlcore.InsertLogParams{
		ID:           log.ID,
		ShortID:      log.ShortID,
		Date:         log.Date.UTC(),
		ChannelName:  log.ChannelName,
		EventName:    log.EventName,
		Title:        log.Title,
		Description:  log.Description,
		Open:         log.Open,
		CharacterIds: log.CharacterIDs,
	})
	if err != nil {
		return nil, err
	}

	err = tx.Commit()
	if err != nil {
		return nil, err
	}

	_ = r.updateTags(log)

	return &log, nil
}

func (r *logRepository) Update(ctx context.Context, log models.Log, update models.LogUpdate) (*models.Log, error) {
	log.ApplyUpdate(update)

	err := psqlcore.New(r.db).UpdateLog(ctx, psqlcore.UpdateLogParams{
		Title:        log.Title,
		EventName:    log.EventName,
		Description:  log.Description,
		Open:         log.Open,
		CharacterIds: log.CharacterIDs,
		ID:           log.ID,
	})
	if err != nil {
		return nil, err
	}

	_ = r.updateTags(log)

	return &log, nil
}

func (r *logRepository) Delete(ctx context.Context, log models.Log) error {
	tx, err := r.db.BeginTx(ctx, nil)
	if err != nil {
		return err
	}
	defer func() { _ = tx.Rollback() }()
	q := psqlcore.New(tx)

	err = q.DeleteLog(ctx, log.ID)
	if err != nil {
		return err
	}

	err = q.DeletePostsByLogShortID(ctx, log.ShortID)
	if err != nil {
		return err
	}

	return tx.Commit()
}

func (r *logRepository) log(log psqlcore.SelectLogRow) *models.Log {
	return &models.Log{
		ID:           log.ID,
		ShortID:      log.ShortID,
		Date:         log.Date,
		ChannelName:  log.ChannelName,
		EventName:    log.EventName,
		Title:        log.Title,
		Description:  log.Description,
		Open:         log.Open,
		CharacterIDs: log.CharacterIds,
	}
}

func (r *logRepository) logs(logs []psqlcore.SelectLogsRow) []*models.Log {
	results := make([]*models.Log, 0, len(logs))
	for _, log := range logs {
		results = append(results, r.log(psqlcore.SelectLogRow(log)))
	}

	return results
}

func (r *logRepository) updateTags(log models.Log) error {
	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
	defer cancel()

	tx, err := r.db.BeginTx(ctx, nil)
	if err != nil {
		return err
	}
	defer func() { _ = tx.Rollback() }()
	q := psqlcore.New(tx)

	err = q.ClearTagsByTarget(ctx, psqlcore.ClearTagsByTargetParams{TargetKind: "Log", TargetID: log.ID})
	if err != nil {
		return err
	}

	if len(log.CharacterIDs) > 0 {
		err := q.SetCharacterTagsFromIDs(ctx, psqlcore.SetCharacterTagsFromIDsParams{
			TargetKind:   "log",
			TargetID:     log.ID,
			CharacterIds: log.CharacterIDs,
		})
		if err != nil {
			return err
		}
	}

	err = q.SetLocationTagFromChannelName(ctx, psqlcore.SetLocationTagFromChannelNameParams{
		TargetKind:  "log",
		TargetID:    log.ID,
		ChannelName: log.ChannelName,
	})
	if err != nil {
		return err
	}

	if log.EventName != "" {
		err := q.SetTag(ctx, psqlcore.SetTagParams{
			Tag:        "Event:" + log.EventName,
			TargetKind: "Log",
			TargetID:   log.ID,
		})
		if err != nil {
			return err
		}
	}

	return tx.Commit()
}