package main

import (
	"h4kor/owl-blogs"
	"sync"

	"github.com/spf13/cobra"
)

var postId string

func init() {
	rootCmd.AddCommand(webmentionCmd)
	webmentionCmd.Flags().StringVar(
		&postId, "post", "",
		"specify the post to send webmentions for. Otherwise, all posts will be checked.",
	)
}

var webmentionCmd = &cobra.Command{
	Use:   "webmention",
	Short: "Send webmentions for posts, optionally for a specific user",
	Long:  `Send webmentions for posts, optionally for a specific user`,
	Run: func(cmd *cobra.Command, args []string) {
		repo, err := owl.OpenRepository(repoPath)
		if err != nil {
			println("Error opening repository: ", err.Error())
			return
		}

		var users []owl.User
		if user == "" {
			// send webmentions for all users
			users, err = repo.Users()
			if err != nil {
				println("Error getting users: ", err.Error())
				return
			}
		} else {
			// send webmentions for a specific user
			user, err := repo.GetUser(user)
			users = append(users, user)
			if err != nil {
				println("Error getting user: ", err.Error())
				return
			}
		}

		processPost := func(user owl.User, post *owl.Post) error {
			println("Webmentions for post: ", post.Title())

			err := post.ScanForLinks()
			if err != nil {
				println("Error scanning post for links: ", err.Error())
				return err
			}

			webmentions := post.OutgoingWebmentions()
			println("Found ", len(webmentions), " links")
			wg := sync.WaitGroup{}
			wg.Add(len(webmentions))
			for _, webmention := range webmentions {
				go func(webmention owl.WebmentionOut) {
					defer wg.Done()
					sendErr := post.SendWebmention(webmention)
					if sendErr != nil {
						println("Error sending webmentions: ", sendErr.Error())
					} else {
						println("Webmention sent to ", webmention.Target)
					}
				}(webmention)
			}
			wg.Wait()
			return nil
		}

		for _, user := range users {
			if postId != "" {
				// send webmentions for a specific post
				post, err := user.GetPost(postId)
				if err != nil {
					println("Error getting post: ", err.Error())
					return
				}
				processPost(user, post)
				return
			}

			posts, err := user.Posts()
			if err != nil {
				println("Error getting posts: ", err.Error())
			}

			for _, post := range posts {
				processPost(user, post)
			}
		}
	},
}