package cmd

import (
	"fmt"
	"strings"

	cmdutil "git.mlow.ca/mlow/lmcli/pkg/cmd/util"
	"git.mlow.ca/mlow/lmcli/pkg/conversation"
	"git.mlow.ca/mlow/lmcli/pkg/lmcli"
	"github.com/spf13/cobra"
)

func RemoveCmd(ctx *lmcli.Context) *cobra.Command {
	cmd := &cobra.Command{
		Use:   "rm <conversation>...",
		Short: "Remove conversations",
		Long:  `Remove conversations by their short names.`,
		Args: func(cmd *cobra.Command, args []string) error {
			argCount := 1
			if err := cobra.MinimumNArgs(argCount)(cmd, args); err != nil {
				return err
			}
			return nil
		},
		RunE: func(cmd *cobra.Command, args []string) error {
			var toRemove []*conversation.Conversation
			for _, shortName := range args {
				conversation := cmdutil.LookupConversation(ctx, shortName)
				toRemove = append(toRemove, conversation)
			}
			var errors []error
			for _, c := range toRemove {
				err := ctx.Conversations.DeleteConversation(c)
				if err != nil {
					errors = append(errors, fmt.Errorf("Could not remove conversation %s: %v", c.ShortName.String, err))
				}
			}
			if len(errors) > 0 {
				return fmt.Errorf("Could not remove some conversations: %v", errors)
			}
			return nil
		},
		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
			compMode := cobra.ShellCompDirectiveNoFileComp
			var completions []string
		outer:
			for _, completion := range ctx.Conversations.ConversationShortNameCompletions(toComplete) {
				parts := strings.Split(completion, "\t")
				for _, arg := range args {
					if parts[0] == arg {
						continue outer
					}
				}
				completions = append(completions, completion)
			}
			return completions, compMode
		},
	}
	return cmd
}