/*
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 Shard(conf *cfg.Config) *cli.Command {
	return &cli.Command{
		Name:    "shard",
		Aliases: []string{"s"},
		Usage:   "manage shards",

		Commands: []*cli.Command{
			ShardList(conf),
			ShardShow(conf),
			ShardAllocation(conf),
		},
	}
}

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

		Flags: []cli.Flag{
			&cli.IntFlag{
				Name:        "max",
				Usage:       "max number of items to process",
				Destination: &conf.MaxItems,
				Aliases:     []string{"m"},
			},
			&cli.BoolFlag{
				Name:        "reds",
				Usage:       "include only failed shards",
				Destination: &conf.Failed,
				Aliases:     []string{"r"},
			},
			&cli.BoolFlag{
				Name:        "primaries",
				Usage:       "show only primary shards",
				Destination: &conf.Primary,
				Aliases:     []string{"p"},
			},
			&cli.BoolFlag{
				Name:        "verbose",
				Usage:       "show node name and ip as well",
				Destination: &conf.Verbose,
				Aliases:     []string{"v"},
			},
		},

		Action: func(ctx context.Context, cmd *cli.Command) error {
			return es.ShardList(conf)
		},
	}
}

func ShardShow(conf *cfg.Config) *cli.Command {
	return &cli.Command{
		Name:    "show",
		Aliases: []string{"sh"},
		Usage:   "show details about a shard",

		Action: func(ctx context.Context, cmd *cli.Command) error {
			index := cmd.Args().Get(0)
			if index == "" {
				return errors.New("no index specified")
			}

			return es.ShardShow(conf, index)
		},
	}
}

func ShardAllocation(conf *cfg.Config) *cli.Command {
	return &cli.Command{
		Name:    "allocation",
		Aliases: []string{"a"},
		Usage:   "explain shard allocation",

		Flags: []cli.Flag{
			&cli.IntFlag{
				Name:        "shard",
				Usage:       "shard number to explain for",
				Destination: &conf.Shards,
				Aliases:     []string{"s"},
			},
			&cli.BoolFlag{
				Name:        "primary",
				Usage:       "explain primary allocation (default true)",
				Destination: &conf.Primary,
				Aliases:     []string{"p"},
			},
			&cli.StringFlag{
				Name:        "node",
				Usage:       "explain a shard only if it is currently located on the specified node name or node ID",
				Destination: &conf.FromNode,
				Aliases:     []string{"n"},
			},
		},

		Action: func(ctx context.Context, cmd *cli.Command) error {
			index := cmd.Args().Get(0)
			if index == "" {
				return errors.New("no index specified")
			}

			return es.ShardAllocation(conf, cmd.Args().Get(0))
		},
	}
}