package main

import (
	"embed"
	"fmt"
	"math/rand"
	"os"
	"os/exec"
	"os/user"
	"path"
	"strings"

	"git.tilde.town/tildetown/town/email"
	"github.com/charmbracelet/glamour"
	"github.com/charmbracelet/huh"
	"gopkg.in/yaml.v3"
)

//go:embed banners/*
var banners embed.FS

//go:embed md/*
var md embed.FS

func banner() (string, error) {
	dirs, err := banners.ReadDir("banners")
	if err != nil {
		return "", err
	}
	mx := len(dirs)
	ix := rand.Intn(mx)
	content, err := banners.ReadFile(path.Join("banners", dirs[ix].Name()))
	if err != nil {
		return "", err
	}

	return string(content), nil

}

func info() error {
	infoContent, err := md.ReadFile("md/info.md")
	if err != nil {
		return err
	}
	out, err := glamour.Render(string(infoContent), "dracula")
	if err != nil {
		return err
	}
	cmd := exec.Command("/usr/bin/bat")
	cmd.Stdin = strings.NewReader(out)
	cmd.Stdout = os.Stdout
	return cmd.Run()
}

type physicalData struct {
	Arriving       string
	Departing      string
	Transportation bool
	Lodging        bool
	Allergies      string
	Couch          bool
}

type rsvpData struct {
	Being        string
	PhysicalData *physicalData `yaml:"PhysicalData,omitempty"`
	Freeform     string
}

func sendRSVPEmail(rd rsvpData) error {
	bs, err := yaml.Marshal(rd)
	if err != nil {
		return err
	}

	return email.SendLocalEmail("vilmibm", "RSVP TOWNCON24", string(bs))
}

func rsvp(o opts) error {
	var being string
	var arriving string
	var departing string
	var transportation bool
	lodging := true
	var allergies string
	couch := true
	var freeform string

	form := huh.NewForm(
		huh.NewGroup(
			huh.NewSelect[string]().Title("How will you be attending?").
				Options(
					huh.NewOption("Digitally", "digital"),
					huh.NewOption("Phyiscally", "physical"),
				).Value(&being)),

		// Physical attendee form
		huh.NewGroup(
			huh.NewInput().Title("When (day/time) are you arriving?").
				Value(&arriving),
			huh.NewInput().Title("When (day/time) are you departing?").
				Value(&departing),
		).WithHideFunc(func() bool {
			return being != "physical"
		}),
		huh.NewGroup(
			huh.NewConfirm().Title("Will you be staying overnight at the venue?").
				Value(&lodging),
		).WithHideFunc(func() bool {
			return being != "physical"
		}),
		huh.NewGroup(
			huh.NewConfirm().Title("If the need arises are you ok sleeping on a couch?").
				Value(&couch),
		).WithHideFunc(func() bool {
			return being != "physical" && !lodging
		}),
		huh.NewGroup(
			huh.NewInput().Title("Do you have any food allergies I should be aware of?").
				Value(&allergies),
			huh.NewConfirm().Title("Will you need any help getting to the venue?").
				Description("I have a car and have some ability to help getting people to the venue").
				Value(&transportation),
		).WithHideFunc(func() bool {
			return being != "physical"
		}),

		// Catch all freeform
		huh.NewGroup(
			huh.NewText().
				Title("Anything you want me to know? Any questions?").
				Value(&freeform)))

	err := form.Run()
	if err != nil {
		return err
	}

	var pd *physicalData

	if being == "physical" {
		pd = &physicalData{
			Arriving:       arriving,
			Departing:      departing,
			Transportation: transportation,
			Lodging:        lodging,
			Allergies:      allergies,
			Couch:          couch,
		}
	}

	rd := rsvpData{
		Being:        being,
		Freeform:     freeform,
		PhysicalData: pd}

	return sendRSVPEmail(rd)
}

type opts struct {
	Username string
}

func _main() error {
	b, err := banner()
	if err != nil {
		return err
	}

	fmt.Println(b)

	u, err := user.Current()
	if err != nil {
		return err
	}

	o := opts{
		Username: u.Username,
	}

	fmt.Printf("\t\t^_^_^_^_^_^_^ hi ~%s ^_^_^_^_^_^_^\n", o.Username)
	fmt.Println()

	var mode string

	huh.NewSelect[string]().Title("whuddyu wanna doo?").
		Options(
			huh.NewOption("Get an info dump", "info"),
			huh.NewOption("RSVP", "rsvp"),
			huh.NewOption("Submit a talk proposal or finished work", "submit"),
			huh.NewOption("Propose a creative jam", "jam"),
			huh.NewOption("Quit", "quit"),
		).Value(&mode).Run()

	switch mode {
	case "info":
		return info()
	case "rsvp":
		return rsvp(o)
	case "submit":
	case "jam":
	case "quit":
	default:
		return fmt.Errorf("wtf '%s'", mode)
	}

	return nil
}

func main() {
	if err := _main(); err != nil {
		fmt.Fprintf(os.Stderr, ":( failed: %s\n", err.Error())
		os.Exit(1)
	}
}