package console

import (
	"context"
	"fmt"

	"git.golem15.com/golem15/summercms/modules/bonfire"
	"git.golem15.com/jakub/sm-bm-plugin/classes"
	"gorm.io/gorm"
)

// chatSyncName is the name of the chat sync command.
const chatSyncName = "bm:chat-sync"

// ChatSyncCommand returns the chat sync console command. withDB runs the
// command's work with the application's database; groups returns the chat
// group code and the moderator group code. It never adds anyone to a group:
// members are assigned by hand in the backend.
func ChatSyncCommand(withDB func(ctx context.Context, fn func(*gorm.DB) error) error, groups func() (string, string)) bonfire.Command {
	return bonfire.Command{
		Name:        chatSyncName,
		Description: "Create the chat groups if missing, sync ogólny participants with the chat group and give members a handle",
		Run: func(ctx context.Context, _ bonfire.Input, out bonfire.Output) error {
			group, moderatorGroup := groups()
			return withDB(ctx, func(db *gorm.DB) error {
				created, err := classes.EnsureChatGroups(ctx, db, group, moderatorGroup)
				if err != nil {
					return fmt.Errorf("%s: groups: %w", chatSyncName, err)
				}
				general, err := classes.FindGeneral(ctx, db)
				if err != nil {
					return fmt.Errorf("%s: ogólny: %w", chatSyncName, err)
				}
				var generalID uint
				if general != nil {
					generalID = general.ID
				}
				added, removed, err := classes.SyncChatParticipants(ctx, db, generalID, group)
				if err != nil {
					return fmt.Errorf("%s: participants: %w", chatSyncName, err)
				}
				handles, err := classes.AssignMissingHandles(ctx, db, group)
				if err != nil {
					return fmt.Errorf("%s: handles: %w", chatSyncName, err)
				}
				out.Printf("groups created: %d\n", created)
				if general == nil {
					out.Printf("ogólny does not exist yet; it is created when a member first opens the chat\n")
				} else {
					out.Printf("ogólny participants added: %d\n", added)
				}
				out.Printf("ogólny participants removed: %d\n", removed)
				out.Printf("handles assigned: %d\n", handles)
				out.Success(chatSyncName + ": chat group " + group + " synced")
				return nil
			})
		},
	}
}