package cmd

import (
	"fmt"

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

func CloneCmd(ctx *lmcli.Context) *cobra.Command {
	cmd := &cobra.Command{
		Use:   "clone <conversation>",
		Short: "Clone conversations",
		Long:  `Clones the provided conversation.`,
		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]
			toClone, err := cmdutil.LookupConversationE(ctx, shortName)
			if err != nil {
				return err
			}

			messagesToCopy, err := ctx.Store.Messages(toClone)
			if err != nil {
				return fmt.Errorf("Could not retrieve messages for conversation: %s", toClone.ShortName.String)
			}

			clone := &model.Conversation{
				Title: toClone.Title + " - Clone",
			}
			if err := ctx.Store.SaveConversation(clone); err != nil {
				return fmt.Errorf("Cloud not create clone: %s", err)
			}

			var errors []error
			messageCnt := 0
			for _, message := range messagesToCopy {
				newMessage := message
				newMessage.ConversationID = clone.ID
				newMessage.ID = 0
				if err := ctx.Store.SaveMessage(&newMessage); err != nil {
					errors = append(errors, err)
				} else {
					messageCnt++
				}
			}

			if len(errors) > 0 {
				return fmt.Errorf("Messages failed to be cloned: %v", errors)
			}

			fmt.Printf("Cloned %d messages to: %s\n", messageCnt, clone.Title)
			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.Store.ConversationShortNameCompletions(toComplete), compMode
		},
	}
	return cmd
}