package main

import (
	"fmt"
	"os"
	"qmail/internal/config"
	"qmail/internal/mail"

	"github.com/jessevdk/go-flags"
	"github.com/olekukonko/tablewriter"
)

type appOptions struct {
	Config string `short:"c" long:"config" description:"Config file"`

	Server    string `short:"s" long:"server" description:"SMTP server for sending"`
	PrintList bool   `short:"l" long:"list" description:"Print servers"`

	From string   `long:"from" description:"e-mail address indicated as sender"`
	To   []string `long:"to" description:""`
}

type helpOptions struct {
	PrintHelp bool `short:"h" long:"help" description:"Show this help message"`
}

func main() {
	appOpt := appOptions{
		Config: config.DefaultConfigPath,
	}

	f := flags.NewParser(&appOpt, flags.PassDoubleDash)
	f.Usage = "[OPTIONS] [FILE]"
	f.LongDescription = "The qmail utility is a tool designed for simple, fast, and convenient email sending"

	helpOpt := helpOptions{}

	f.AddGroup("Help options", "", &helpOpt)

	args, err := f.ParseArgs(os.Args)
	if err != nil {
		fmt.Println(err)
		return
	}

	if helpOpt.PrintHelp {
		f.WriteHelp(os.Stderr)
		return
	}

	cfg, err := config.LoadConfig(appOpt.Config)
	if err != nil {
		fmt.Println(err)
		return
	}

	if appOpt.PrintList {
		table := tablewriter.NewWriter(os.Stdout)

		table.SetHeader([]string{"Name", "Host", "Port", "TLS", "Login"})

		for _, s := range cfg.Servers {
			login := ""

			if s.Auth != nil {
				login = s.Auth.Login
			}

			useTLS := "-"
			if s.UseTLS {
				useTLS = "+"
			}

			table.Append([]string{
				s.Name,
				s.Host,
				fmt.Sprintf("%d", s.Port),
				useTLS,
				login,
			})
		}

		table.Render()

		return
	}

	if appOpt.Server != "" {
		var server *config.Server

		for _, s := range cfg.Servers {
			if s.Name == appOpt.Server {
				server = &s
			}
		}

		if server == nil {
			panic("omg")
		}

		var bodyFile string

		if len(args) > 1 {
			bodyFile = args[1]
		} else {
			bodyFile = "/dev/stdin"
		}

		body, err := os.ReadFile(bodyFile)
		if err != nil {
			panic("qq")
		}

		err = mail.SendMail(server, appOpt.From, appOpt.To, body)
		if err != nil {
			panic(err)
		}
	}
}