package cmd

import (
	"fmt"

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

func ViewCmd(ctx *lmcli.Context) *cobra.Command {
	cmd := &cobra.Command{
		Use:   "view <conversation>",
		Short: "View messages in a conversation",
		Long:  `Finds a conversation by its short name and displays its contents.`,
		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 {
			shortName := args[0]
			conversation := cmdutil.LookupConversation(ctx, shortName)

			messages, err := ctx.Conversations.PathToLeaf(conversation.SelectedRoot)
			if err != nil {
				return fmt.Errorf("Could not retrieve messages for conversation %s: %v", conversation.ShortName.String, err)
			}

			cmdutil.RenderConversation(ctx, messages, false)
			return nil
		},
		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
			compMode := cobra.ShellCompDirectiveNoFileComp
			if len(args) != 0 {
				return nil, compMode
			}
			return ctx.Conversations.ConversationShortNameCompletions(toComplete), compMode
		},
	}

	return cmd
}