// peertube-instance-index-filter
// Copyright (C) 2025 Arns Udovič <zordsdavini@arns.lt>
// 
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
// 
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package main

import (
	"flag"
	"fmt"
	"net/url"
	"strings"

	"github.com/gin-gonic/gin"
)

func main() {
	var command string
	var host string

	flag.StringVar(&command, "command", "", "Command to execute")
	flag.StringVar(&host, "host", "", "Host for command")

	flag.Parse()
	fmt.Println(command, host)
	
	switch command {
		case "index":
			index(host)
		case "reject":
			reject(host)
		case "collect":
			collect()
		default:
			serve()
	}
}

func index(url string) {
	db := connectDB()
	defer db.Close()

	exists, err := indexExists(db, url)
	if err != nil {
		panic(err)	
	}

	if !exists {
		addIndex(db, url)
		fmt.Println(url, "added to index")
	} else {
		fmt.Println(url, "already added")
	}
}

func reject(host string) {
	host = formatHost(host)

	db := connectDB()
	defer db.Close()

	rejectHost(db, host)
	fmt.Println(host, "rejected")
}

func collect() {
	// TODO: implement
}

func serve() {
	r := gin.Default()

	r.GET("/instances", func(c *gin.Context) {
		c.String(200, "pong")
	})

	r.GET("/instances/hosts", func(c *gin.Context) {
		c.String(200, "pong")
	})

	r.GET("/stats", func(c *gin.Context) {
		c.String(200, "pong")
	})

	r.Run(":8080")
}

func formatHost(host string) string {
	host = strings.Trim(host, " ")

	u, _ := url.Parse(host)

	if u.Host == "" {
		return host
	}

	return u.Host
}