/*
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 IndexAlias(conf *cfg.Config) *cli.Command {
	return &cli.Command{
		Name:    "alias",
		Aliases: []string{"a"},
		Usage:   "manage index aliases",

		Commands: []*cli.Command{
			IndexAliasCreate(conf),
			IndexAliasList(conf),
			IndexAliasDelete(conf),
			IndexAliasRollover(conf),
			// FIXME: implement IndexAliasAdd
			// see https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-indices-update-aliases
			// IndexAliasAdd(conf),
		},
	}
}

func IndexAliasCreate(conf *cfg.Config) *cli.Command {
	return &cli.Command{
		Name:      "create",
		Aliases:   []string{"+"},
		Usage:     "create an index alias",
		UsageText: "create <index> <alias>",

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

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

			if index == "" || alias == "" {
				return errors.New("no index or alias specified")
			}

			return es.IndexAliasCreate(conf, index, alias)
		},
	}
}

func IndexAliasDelete(conf *cfg.Config) *cli.Command {
	return &cli.Command{
		Name:      "delete",
		Aliases:   []string{"rm"},
		Usage:     "delete an index alias",
		UsageText: "delete <index> <alias>",

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

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

			if index == "" || alias == "" {
				return errors.New("no index or alias specified")
			}

			return es.IndexAliasDelete(conf, index, alias)
		},
	}
}

func IndexAliasRollover(conf *cfg.Config) *cli.Command {
	return &cli.Command{
		Name:      "rollover",
		Aliases:   []string{"roll"},
		Usage:     "roll over an index alias",
		UsageText: "rollover <alias>",

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

		Flags: []cli.Flag{
			&cli.BoolFlag{
				Name:        "wait",
				Usage:       "wait for active shards",
				Destination: &conf.Wait,
				Aliases:     []string{"w"},
			},
			&cli.BoolFlag{
				Name:        "dry-run",
				Usage:       "checks conditions but does not perform a rollover",
				Destination: &conf.Wait,
				Aliases:     []string{"n"},
			},
			&cli.StringFlag{
				Name:        "max-age",
				Usage:       "roll over after max age (eg: 7d, 2m, 8h)",
				Destination: &conf.MaxAge,
			},
			&cli.IntFlag{
				Name:        "max-docs",
				Usage:       "roll over after max docs",
				Destination: &conf.MaxDocs,
			},
			&cli.IntFlag{
				Name:        "max-primary-shard-size",
				Usage:       "roll over when primary shard size reaches size",
				Destination: &conf.MaxShardSize,
			},
			&cli.IntFlag{
				Name:        "max-primary-shard-docs",
				Usage:       "roll over after max docs in primary shard reached",
				Destination: &conf.MaxShardDocs,
			},
		},

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

			if alias == "" {
				return errors.New("no alias specified")
			}

			return es.IndexAliasRollover(conf, alias)
		},
	}
}

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

		Flags: []cli.Flag{
			&cli.StringSliceFlag{
				Name:        "filter",
				Usage:       "show only aliases for indicies matching the filter",
				Destination: &conf.Filter,
				Aliases:     []string{"F"},
			},
		},

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