/*
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 Ilm(conf *cfg.Config) *cli.Command {
	return &cli.Command{
		Name:  "ilm",
		Usage: "manage index lifecycle",

		Commands: []*cli.Command{
			IlmRetry(conf),
			IlmStatus(conf),
			IlmList(conf),
			IlmShow(conf),
			IlmCreate(conf, false),
			IlmCreate(conf, true),
			IlmForecast(conf),
			IlmExplain(conf),
		},
	}
}

func IlmRetry(conf *cfg.Config) *cli.Command {
	return &cli.Command{
		Name:      "retry",
		Usage:     "retry applying an ILM profile to an index",
		UsageText: "retry <index>",

		Action: func(ctx context.Context, cmd *cli.Command) error {
			return es.IlmRetry(conf, cmd.Args().Get(0))
		},
	}
}

func IlmExplain(conf *cfg.Config) *cli.Command {
	return &cli.Command{
		Name:      "explain",
		Usage:     "explain ilm condition of an index",
		UsageText: "explain <index>",

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

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

func IlmStatus(conf *cfg.Config) *cli.Command {
	return &cli.Command{
		Name:  "status",
		Usage: "get the current index lifecycle management status",

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

func IlmList(conf *cfg.Config) *cli.Command {
	return &cli.Command{
		Name:      "list",
		Aliases:   []string{"ls"},
		Usage:     "list index lifecycle policies",
		UsageText: "list [<policy-pattern>]",

		Action: func(ctx context.Context, cmd *cli.Command) error {
			return es.IlmList(conf, cmd.Args().Get(0))
		},
	}
}

func IlmShow(conf *cfg.Config) *cli.Command {
	return &cli.Command{
		Name:      "show",
		Aliases:   []string{"sh"},
		Usage:     "show details about an index lifecycle policy",
		UsageText: "show <policy>",

		Flags: []cli.Flag{
			&cli.BoolFlag{
				Name:        "tree",
				Usage:       "display policy as a tree",
				Destination: &conf.Ilm.Tree,
				Aliases:     []string{"t"},
			},
		},

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

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

		ShellComplete: func(ctx context.Context, cmd *cli.Command) {
			complete(cmd, Cilm)
		},
	}
}

func IlmCreate(conf *cfg.Config, modify bool) *cli.Command {
	name := "create"
	alias := "+"
	usage := "create a new lifecycle policy"

	if modify {
		name = "update"
		usage = "update an lifecycle policy"
		alias = "upd"
	}

	return &cli.Command{
		Name:      name,
		Aliases:   []string{alias},
		Usage:     usage,
		UsageText: name + " [options] <policy>",

		Flags: []cli.Flag{
			&cli.StringFlag{
				Name:        "description",
				Usage:       "policy description",
				Destination: &conf.Ilm.Description,
				Aliases:     []string{"D"},
			},

			// hot
			&cli.StringFlag{
				Name:        "hot-min-age",
				Usage:       "hot phase: min age",
				Destination: &conf.Ilm.HotMinAge,
			},
			&cli.StringFlag{
				Name:        "hot-rollover-max-age",
				Usage:       "hot phase: rollover after",
				Destination: &conf.Ilm.HotRolloverMaxAge,
			},
			&cli.StringFlag{
				Name:        "hot-rollover-max-primary-shard-size",
				Usage:       "hot phase: max primary shard size",
				Destination: &conf.Ilm.HotRolloverMaxPrimaryShardSize,
			},
			&cli.Int64Flag{
				Name:        "hot-rollover-max-docs",
				Usage:       "hot phase: max docs",
				Destination: &conf.Ilm.HotRolloverMaxDocs,
			},
			&cli.BoolFlag{
				Name:        "hot-readonly",
				Usage:       "hot phase: make index ro before rollover",
				Destination: &conf.Ilm.HotReadonly,
			},

			// warm
			&cli.StringFlag{
				Name:        "warm-min-age",
				Usage:       "warm phase: min age",
				Destination: &conf.Ilm.WarmMinAge,
			},
			&cli.IntFlag{
				Name:        "warm-force-merge-segments",
				Usage:       "warm phase: force merge segments per shard",
				Destination: &conf.Ilm.WarmForceMerge,
			},
			&cli.IntFlag{
				Name:        "warm-shrink-shards",
				Usage:       "warm phase: shrink on number of shards",
				Destination: &conf.Ilm.WarmShrinkShards,
			},
			&cli.IntFlag{
				Name:        "warm-priority",
				Usage:       "warm phase: priority",
				Destination: &conf.Ilm.WarmPriority,
			},

			// cold
			&cli.StringFlag{
				Name:        "cold-min-age",
				Usage:       "cold phase: min age",
				Destination: &conf.Ilm.ColdMinAge,
			},
			&cli.StringFlag{
				Name:        "cold-searchable-snapshot-repo",
				Usage:       "cold phase: searchable snapshot repo",
				Destination: &conf.Ilm.ColdSearchableSnapshotRepo,
			},
			&cli.IntFlag{
				Name:        "cold-force-merge-segments",
				Usage:       "cold phase: force merge segments per shard",
				Destination: &conf.Ilm.ColdForceMerge,
			},
			&cli.IntFlag{
				Name:        "cold-priority",
				Usage:       "cold phase: priority",
				Destination: &conf.Ilm.ColdPriority,
			},

			// frozen
			&cli.StringFlag{
				Name:        "frozen-min-age",
				Usage:       "frozen phase: min age",
				Destination: &conf.Ilm.FrozenMinAge,
			},
			&cli.StringFlag{
				Name:        "frozen-searchable-snapshot-repo",
				Usage:       "frozen phase: searchable snapshot repo",
				Destination: &conf.Ilm.FrozenSearchableSnapshotRepo,
			},

			// delete
			&cli.StringFlag{
				Name:        "delete-min-age",
				Usage:       "delete phase: min age",
				Destination: &conf.Ilm.DeleteMinAge,
			},
			&cli.BoolFlag{
				Name:        "delete-searchable-snapshots",
				Usage:       "delete phase: delete searchable snapshots",
				Destination: &conf.Ilm.DeleteSearchableSnapshots,
			},
		},

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

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