/*
Copyright © 2026 Thomas von Dein

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package es

import (
	"context"
	"encoding/json"
	"fmt"

	"codeberg.org/scip/esctl/pkg/cfg"
	"codeberg.org/scip/esctl/pkg/printer"
	"github.com/urfave/cli/v3"
)

func ClusterSettingsNames(conf *cfg.Config) ([]string, error) {
	return validClusterSettings, nil
}

func ClusterSettingsList(conf *cfg.Config) error {
	res, err := conf.DefaultCluster.ES().Cluster.GetSettings().
		FlatSettings(true).
		Do(context.Background())
	if err != nil {
		return fmt.Errorf("failed to get cluster settings: %s", esErrorString(err))
	}

	table := printer.NewTable(conf, 2, 0)
	table.Addheaders("setting", "value")
	entries := [][]any{}

	settingshash := res.Persistent // == map[string]json.RawMessage

	switch {
	case conf.Transient:
		settingshash = res.Transient
	case conf.Default:
		settingshash = res.Defaults
	}

	for topic, val := range settingshash {
		entries = append(entries, []any{topic, string(val)})
	}

	table.Entries = entries
	table.Sort()

	if err := table.Print(); err != nil {
		return err
	}

	return nil
}

func ClusterSettingsSet(conf *cfg.Config, args cli.Args) error {
	put := conf.DefaultCluster.ES().Cluster.PutSettings()

	for _, arg := range args.Slice() {
		setting, value := splitArg(arg)

		switch {
		case conf.Transient:
			message, err := json.Marshal(value)
			if err != nil {
				return fmt.Errorf("failed to marshall transient value <%v> to valid JSON: %s", value, err)
			}
			put.AddTransient(setting, message)
		case conf.Persistent:
			fallthrough
		default:
			message, err := json.Marshal(value)
			if err != nil {
				return fmt.Errorf("failed to marshall persistent value <%v> to valid JSON: %s", value, err)
			}
			put.AddPersistent(setting, message)
		}
	}

	_, err := put.Do(context.Background())
	if err != nil {
		return fmt.Errorf("failed to set settings: %s", esErrorString(err))
	}

	return nil
}

func ClusterSettingsSetSingle(conf *cfg.Config, setting, value string) error {
	message, err := json.Marshal(value)
	if err != nil {
		return fmt.Errorf("failed to marshall persistent value <%v> to valid JSON: %s", value, err)
	}

	_, err = conf.DefaultCluster.ES().Cluster.PutSettings().
		AddPersistent(setting, message).
		Do(context.Background())

	if err != nil {
		return fmt.Errorf("failed to set %s: %s", setting, esErrorString(err))
	}

	return nil
}