package main

import (
	"encoding/json"
	"fmt"
	"os"
	"os/exec"
	"strconv"

	miniflux "miniflux.app/client"
)

// Help message
const HELP = `examples:
    mfeed create {category_id} {feed_url}
    mfeed feeds {category_id}

usage: mfeed [-h] {feeds,categories,create} ...
    feeds       list all the feeds you have
    categories  list all the categories you have
    create      create a new feed

positional arguments:
  {feeds, categories, create}

options:
  -h, --help  shows this help page`

// Crreate the config struct
type Configuration struct {
	Instance  string
	User      string
	Pass_Eval []string
}

func main() {
	// print help message based on first argument
	if len(os.Args) < 2 {
		fmt.Println(HELP)
		return
	} else if os.Args[1] == "-h" {
		fmt.Println(HELP)
		return
	} else if os.Args[1] == "--help" {
		fmt.Println(HELP)
		return
	}

	// get config folder locaation
	config_dir, _ := os.UserConfigDir()

	// Load the config file
	content, err := os.ReadFile(config_dir + "/mfeed/config.json")
	if err != nil {
		panic(err)
	}

	// load configuration file
	var config Configuration
	err = json.Unmarshal(content, &config)
	if err != nil {
		panic(err)
	}

	// fmt.Println(dirname)
	cmd := config.Pass_Eval[0]
	args := config.Pass_Eval[1:]

	// load the password from the provided command
	pass, err := exec.Command(cmd, args...).Output()
	if err != nil {
		panic(err)
	}

	// Connect to the miniflux instance
	client := miniflux.New(
		config.Instance,
		config.User,
		string(pass),
	)

	// Run fuction based on first argument
	switch os.Args[1] {
	case "feeds":
		feeds(client)
	case "categories":
		categories(client)
	case "create":
		create(client)
	default:
		fmt.Println("This option doesn't exist")
	}
	return
}

// Print out all your feeds and their id's, or feeds in a category if provided
func feeds(client *miniflux.Client) {
	if len(os.Args) < 3 {
		feeds, err := client.Feeds()
		if err != nil {
			fmt.Println(err)
			return
		}
		for _, feed := range feeds {
			fmt.Printf("%d\t%s\n", feed.ID, feed.Title)
		}
		return
	} else if len(os.Args) > 3 {
		fmt.Println("Too many arguments provided!")
		return
	} else {
		category, err := strconv.Atoi(os.Args[2])
		if err != nil {
			panic(err)
		}
		feeds, err := client.CategoryFeeds(int64(category))
		for _, feed := range feeds {
			fmt.Printf("%d\t%s\n", feed.ID, feed.Title)
		}
	}
}

// Print out all your categories and their id's
func categories(client *miniflux.Client) {
	categories, err := client.Categories()
	if err != nil {
		fmt.Println(err)
		return
	}
	for _, category := range categories {
		fmt.Printf("%d\t%s\n", category.ID, category.Title)
	}
}

// Create a feed based on the category number and feed url
func create(client *miniflux.Client) {
	// check if feed category was provided
	if len(os.Args) < 3 {
		panic("Feed category not provided")
	}
	category, err := strconv.Atoi(os.Args[2])
	if err != nil {
		panic(err)
	}

	// check if feed url was provided
	if len(os.Args) < 4 {
		panic("Feed url not provided")
	}

	// Create feed request and send it
	var feed_create_request miniflux.FeedCreationRequest
	feed_create_request.FeedURL = os.Args[3]
	feed_create_request.CategoryID = int64(category)

	// Crete the feed
	id, err := client.CreateFeed(&feed_create_request)
	if err != nil {
		panic(err)
	}

	// Get the new feed and prits its name and id
	feed, err := client.Feed(id)
	if err != nil {
		panic(err)
	}
	fmt.Printf("Feed '%s' with id '%d' was created\n", feed.Title, feed.ID)
}