/*
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 cmd

import (
	"context"
	"errors"

	"codeberg.org/scip/esctl/pkg/cfg"
	"codeberg.org/scip/esctl/pkg/es"

	"github.com/urfave/cli/v3"
)

func Cluster(conf *cfg.Config) *cli.Command {
	return &cli.Command{
		Name:    "cluster",
		Aliases: []string{"c"},
		Usage:   "manage cluster[s]",

		Commands: []*cli.Command{
			ClusterCompare(conf),
			ClusterStatus(conf),
			ClusterList(conf),
			ClusterSettings(conf),
		},
	}
}

func ClusterList(conf *cfg.Config) *cli.Command {
	return &cli.Command{
		Name:    "list",
		Usage:   "list configured clusters",
		Aliases: []string{"ls"},

		Action: func(ctx context.Context, cmd *cli.Command) error {
			if err := es.ClusterList(conf); err != nil {
				return err
			}

			return nil
		},
	}
}

func ClusterStatus(conf *cfg.Config) *cli.Command {
	return &cli.Command{
		Name:    "status",
		Usage:   "show cluster status",
		Aliases: []string{"s"},

		Flags: []cli.Flag{
			&cli.BoolFlag{
				Name:        "all",
				Usage:       "show status of all clusters",
				Destination: &conf.All,
				Aliases:     []string{"a"},
			},
		},

		Action: func(ctx context.Context, cmd *cli.Command) error {
			if err := es.ClusterStatus(conf); err != nil {
				return err
			}

			return nil
		},
	}
}

func ClusterCompare(conf *cfg.Config) *cli.Command {
	return &cli.Command{
		Name:    "compare",
		Aliases: []string{"c"},
		Usage:   "compare cluster[s] (yaml config with 2 clusters required)",

		Flags: []cli.Flag{
			&cli.StringFlag{
				Name:        "exclude",
				Usage:       "regexp of indicies to exclude",
				Destination: &conf.Exclude,
				Aliases:     []string{"e"},
			},
		},

		Action: func(ctx context.Context, cmd *cli.Command) error {
			leader := cmd.Args().Get(0)
			follower := cmd.Args().Get(1)

			if leader == "" || follower == "" {
				return errors.New("no leader and follower aliases specified")
			}

			_, hasLeader := conf.Clusters[leader]
			_, hasFollower := conf.Clusters[follower]

			if !hasLeader || !hasFollower {
				return errors.New("either leader or follower alias not configured")
			}

			if err := es.ClusterCompare(conf, leader, follower); err != nil {
				return err
			}

			return nil
		},
	}
}

func ClusterSettings(conf *cfg.Config) *cli.Command {
	return &cli.Command{
		Name:    "settings",
		Usage:   "cluster settings management",
		Aliases: []string{"config"},

		Commands: []*cli.Command{
			ClusterSettingsList(conf),
			ClusterSettingsSet(conf),
		},
	}
}

func ClusterSettingsList(conf *cfg.Config) *cli.Command {
	return &cli.Command{
		Name:    "list",
		Usage:   "show cluster settings",
		Aliases: []string{"ls", "get"},

		Action: func(ctx context.Context, cmd *cli.Command) error {
			if err := es.ClusterSettingsList(conf); err != nil {
				return err
			}

			return nil
		},
	}
}

func ClusterSettingsSet(conf *cfg.Config) *cli.Command {
	return &cli.Command{
		Name:      "set",
		Usage:     "set|update cluster settings",
		Aliases:   []string{"set", "update"},
		UsageText: "set [options] setting:value [setting:value ...]",

		Flags: []cli.Flag{
			&cli.BoolFlag{
				Name:        "persistent",
				Usage:       "add persistent setting[s] (default)",
				Destination: &conf.Persistent,
				Aliases:     []string{"p"},
			},
			&cli.BoolFlag{
				Name:        "transient",
				Usage:       "add transient setting[s]",
				Destination: &conf.Transient,
				Aliases:     []string{"t"},
			},
		},

		Action: func(ctx context.Context, cmd *cli.Command) error {
			if err := es.ClusterSettingsSet(conf, cmd.Args()); err != nil {
				return err
			}

			return nil
		},
	}
}