package database

import (
	"context"
	"database/sql"

	sq "github.com/Masterminds/squirrel"

	"github.com/autobrr/autobrr/internal/domain"

	"github.com/rs/zerolog/log"
)

type IrcRepo struct {
	db *SqliteDB
}

func NewIrcRepo(db *SqliteDB) domain.IrcRepo {
	return &IrcRepo{db: db}
}

func (r *IrcRepo) GetNetworkByID(id int64) (*domain.IrcNetwork, error) {
	//r.db.lock.RLock()
	//defer r.db.lock.RUnlock()

	row := r.db.handler.QueryRow("SELECT id, enabled, name, server, port, tls, pass, invite_command, nickserv_account, nickserv_password FROM irc_network WHERE id = ?", id)
	if err := row.Err(); err != nil {
		log.Fatal().Err(err)
		return nil, err
	}

	var n domain.IrcNetwork

	var pass, inviteCmd sql.NullString
	var nsAccount, nsPassword sql.NullString
	var tls sql.NullBool

	if err := row.Scan(&n.ID, &n.Enabled, &n.Name, &n.Server, &n.Port, &tls, &pass, &inviteCmd, &nsAccount, &nsPassword); err != nil {
		log.Fatal().Err(err)
	}

	n.TLS = tls.Bool
	n.Pass = pass.String
	n.InviteCommand = inviteCmd.String
	n.NickServ.Account = nsAccount.String
	n.NickServ.Password = nsPassword.String

	return &n, nil
}

func (r *IrcRepo) DeleteNetwork(ctx context.Context, id int64) error {
	tx, err := r.db.handler.BeginTx(ctx, nil)
	if err != nil {
		return err
	}

	defer tx.Rollback()

	_, err = tx.ExecContext(ctx, `DELETE FROM irc_network WHERE id = ?`, id)
	if err != nil {
		log.Error().Stack().Err(err).Msgf("error deleting network: %v", id)
		return err
	}

	_, err = tx.ExecContext(ctx, `DELETE FROM irc_channel WHERE network_id = ?`, id)
	if err != nil {
		log.Error().Stack().Err(err).Msgf("error deleting channels for network: %v", id)
		return err
	}

	err = tx.Commit()
	if err != nil {
		log.Error().Stack().Err(err).Msgf("error deleting network: %v", id)
		return err

	}

	return nil
}

func (r *IrcRepo) FindActiveNetworks(ctx context.Context) ([]domain.IrcNetwork, error) {
	//r.db.lock.RLock()
	//defer r.db.lock.RUnlock()

	rows, err := r.db.handler.QueryContext(ctx, "SELECT id, enabled, name, server, port, tls, pass, invite_command, nickserv_account, nickserv_password FROM irc_network WHERE enabled = true")
	if err != nil {
		log.Fatal().Err(err)
	}

	defer rows.Close()

	var networks []domain.IrcNetwork
	for rows.Next() {
		var net domain.IrcNetwork

		var pass, inviteCmd sql.NullString
		var tls sql.NullBool

		if err := rows.Scan(&net.ID, &net.Enabled, &net.Name, &net.Server, &net.Port, &tls, &pass, &inviteCmd, &net.NickServ.Account, &net.NickServ.Password); err != nil {
			log.Fatal().Err(err)
		}

		net.TLS = tls.Bool
		net.Pass = pass.String
		net.InviteCommand = inviteCmd.String

		networks = append(networks, net)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}

	return networks, nil
}

func (r *IrcRepo) ListNetworks(ctx context.Context) ([]domain.IrcNetwork, error) {
	//r.db.lock.RLock()
	//defer r.db.lock.RUnlock()

	rows, err := r.db.handler.QueryContext(ctx, "SELECT id, enabled, name, server, port, tls, pass, invite_command, nickserv_account, nickserv_password FROM irc_network ORDER BY name ASC")
	if err != nil {
		log.Fatal().Err(err)
	}

	defer rows.Close()

	var networks []domain.IrcNetwork
	for rows.Next() {
		var net domain.IrcNetwork

		var pass, inviteCmd sql.NullString
		var tls sql.NullBool

		if err := rows.Scan(&net.ID, &net.Enabled, &net.Name, &net.Server, &net.Port, &tls, &pass, &inviteCmd, &net.NickServ.Account, &net.NickServ.Password); err != nil {
			log.Fatal().Err(err)
		}

		net.TLS = tls.Bool
		net.Pass = pass.String
		net.InviteCommand = inviteCmd.String

		networks = append(networks, net)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}

	return networks, nil
}

func (r *IrcRepo) ListChannels(networkID int64) ([]domain.IrcChannel, error) {
	//r.db.lock.RLock()
	//defer r.db.lock.RUnlock()

	rows, err := r.db.handler.Query("SELECT id, name, enabled FROM irc_channel WHERE network_id = ?", networkID)
	if err != nil {
		log.Fatal().Err(err)
	}
	defer rows.Close()

	var channels []domain.IrcChannel
	for rows.Next() {
		var ch domain.IrcChannel

		if err := rows.Scan(&ch.ID, &ch.Name, &ch.Enabled); err != nil {
			log.Fatal().Err(err)
		}

		channels = append(channels, ch)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}

	return channels, nil
}

func (r *IrcRepo) CheckExistingNetwork(ctx context.Context, network *domain.IrcNetwork) (*domain.IrcNetwork, error) {
	//r.db.lock.RLock()
	//defer r.db.lock.RUnlock()

	queryBuilder := sq.
		Select("id", "enabled", "name", "server", "port", "tls", "pass", "invite_command", "nickserv_account", "nickserv_password").
		From("irc_network").
		Where("server = ?", network.Server).
		Where("nickserv_account = ?", network.NickServ.Account)

	query, args, err := queryBuilder.ToSql()
	if err != nil {
		log.Error().Stack().Err(err).Msg("irc.check_existing_network: error fetching data")
		return nil, err
	}
	log.Trace().Str("database", "irc.check_existing_network").Msgf("query: '%v', args: '%v'", query, args)

	row := r.db.handler.QueryRowContext(ctx, query, args...)

	var net domain.IrcNetwork

	var pass, inviteCmd, nickPass sql.NullString
	var tls sql.NullBool

	err = row.Scan(&net.ID, &net.Enabled, &net.Name, &net.Server, &net.Port, &tls, &pass, &inviteCmd, &net.NickServ.Account, &nickPass)
	if err == sql.ErrNoRows {
		// no result is not an error in our case
		return nil, nil
	} else if err != nil {
		log.Error().Stack().Err(err).Msg("irc.check_existing_network: error scanning data to struct")
		return nil, err
	}

	net.TLS = tls.Bool
	net.Pass = pass.String
	net.InviteCommand = inviteCmd.String
	net.NickServ.Password = nickPass.String

	return &net, nil
}

func (r *IrcRepo) StoreNetwork(network *domain.IrcNetwork) error {
	//r.db.lock.RLock()
	//defer r.db.lock.RUnlock()

	netName := toNullString(network.Name)
	pass := toNullString(network.Pass)
	inviteCmd := toNullString(network.InviteCommand)

	nsAccount := toNullString(network.NickServ.Account)
	nsPassword := toNullString(network.NickServ.Password)

	var err error
	if network.ID != 0 {
		// update record
		_, err = r.db.handler.Exec(`UPDATE irc_network
			SET enabled = ?,
			    name = ?,
			    server = ?,
			    port = ?,
			    tls = ?,
			    pass = ?,
			    invite_command = ?,
			    nickserv_account = ?,
			    nickserv_password = ?,
			    updated_at = CURRENT_TIMESTAMP
			WHERE id = ?`,
			network.Enabled,
			netName,
			network.Server,
			network.Port,
			network.TLS,
			pass,
			inviteCmd,
			nsAccount,
			nsPassword,
			network.ID,
		)
		if err != nil {
			log.Error().Stack().Err(err).Msg("irc.store_network: error executing query")
			return err
		}
	} else {
		var res sql.Result

		res, err = r.db.handler.Exec(`INSERT INTO irc_network (
                         enabled,
                         name,
                         server,
                         port,
                         tls,
                         pass,
                         invite_command,
			    		 nickserv_account,
			             nickserv_password
                         ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?) ON CONFLICT DO NOTHING`,
			network.Enabled,
			netName,
			network.Server,
			network.Port,
			network.TLS,
			pass,
			inviteCmd,
			nsAccount,
			nsPassword,
		)
		if err != nil {
			log.Error().Stack().Err(err).Msg("irc.store_network: error executing query")
			return err
		}

		network.ID, err = res.LastInsertId()
	}

	return err
}

func (r *IrcRepo) UpdateNetwork(ctx context.Context, network *domain.IrcNetwork) error {
	//r.db.lock.RLock()
	//defer r.db.lock.RUnlock()

	netName := toNullString(network.Name)
	pass := toNullString(network.Pass)
	inviteCmd := toNullString(network.InviteCommand)

	nsAccount := toNullString(network.NickServ.Account)
	nsPassword := toNullString(network.NickServ.Password)

	var err error
	// update record
	_, err = r.db.handler.ExecContext(ctx, `UPDATE irc_network
			SET enabled = ?,
			    name = ?,
			    server = ?,
			    port = ?,
			    tls = ?,
			    pass = ?,
			    invite_command = ?,
			    nickserv_account = ?,
			    nickserv_password = ?,
			    updated_at = CURRENT_TIMESTAMP
			WHERE id = ?`,
		network.Enabled,
		netName,
		network.Server,
		network.Port,
		network.TLS,
		pass,
		inviteCmd,
		nsAccount,
		nsPassword,
		network.ID,
	)
	if err != nil {
		log.Error().Stack().Err(err).Msg("irc.store_network: error executing query")
		return err
	}

	return err
}

// TODO create new channel handler to only add, not delete

func (r *IrcRepo) StoreNetworkChannels(ctx context.Context, networkID int64, channels []domain.IrcChannel) error {
	//r.db.lock.RLock()
	//defer r.db.lock.RUnlock()

	tx, err := r.db.handler.BeginTx(ctx, nil)
	if err != nil {
		return err
	}

	defer tx.Rollback()

	_, err = tx.ExecContext(ctx, `DELETE FROM irc_channel WHERE network_id = ?`, networkID)
	if err != nil {
		log.Error().Stack().Err(err).Msgf("error deleting channels for network: %v", networkID)
		return err
	}

	for _, channel := range channels {
		var res sql.Result
		pass := toNullString(channel.Password)

		res, err = tx.ExecContext(ctx, `INSERT INTO irc_channel (
                         enabled,
                         detached,
                         name,
                         password,
                         network_id
                         ) VALUES (?, ?, ?, ?, ?)`,
			channel.Enabled,
			true,
			channel.Name,
			pass,
			networkID,
		)
		if err != nil {
			log.Error().Stack().Err(err).Msg("error executing query")
			return err
		}

		channel.ID, err = res.LastInsertId()
	}

	err = tx.Commit()
	if err != nil {
		log.Error().Stack().Err(err).Msgf("error deleting network: %v", networkID)
		return err
	}

	return nil
}

func (r *IrcRepo) StoreChannel(networkID int64, channel *domain.IrcChannel) error {
	//r.db.lock.RLock()
	//defer r.db.lock.RUnlock()

	pass := toNullString(channel.Password)

	var err error
	if channel.ID != 0 {
		// update record
		_, err = r.db.handler.Exec(`UPDATE irc_channel
			SET 
			    enabled = ?,
				detached = ?,
				name = ?,
				password = ?
			WHERE 
			      id = ?`,
			channel.Enabled,
			channel.Detached,
			channel.Name,
			pass,
			channel.ID,
		)
	} else {
		var res sql.Result

		res, err = r.db.handler.Exec(`INSERT INTO irc_channel (
                         enabled,
                         detached,
                         name,
                         password,
                         network_id
                         ) VALUES (?, ?, ?, ?, ?) ON CONFLICT DO NOTHING`,
			channel.Enabled,
			true,
			channel.Name,
			pass,
			networkID,
		)
		if err != nil {
			log.Error().Stack().Err(err).Msg("error executing query")
			return err
		}

		channel.ID, err = res.LastInsertId()
	}

	return err
}