package main

import (
	"context"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"net/smtp"
	"net/url"
	"os"
	"os/signal"
	"path"
	"runtime"
	"syscall"
	"time"

	"gitea.urkob.com/mcr-swiss/gogstea/config"
	"gitea.urkob.com/mcr-swiss/gogstea/internal/mail"
	emailsender "gitea.urkob.com/urko/emailsender/pkg/email"
)

func main() {
	ctx, cancel := context.WithCancel(signalContext(context.Background()))
	defer cancel()

	cfgFile := os.Getenv("CONFIG_FILE")
	if cfgFile == "" {
		// Get root path
		_, filename, _, _ := runtime.Caller(0)
		cfgFile = path.Join(path.Dir(filename), "configs", "app.yml")
	}
	cfg, err := config.LoadConfig(cfgFile)
	if err != nil {
		panic(err)
	}

	ms := mail.NewMailService(
		cfg.Email.From,
		emailsender.NewSecure(emailsender.MailServiceConfig{
			Auth: smtp.PlainAuth("", cfg.Email.User, cfg.Email.Password, cfg.Email.Host),
			Host: cfg.Email.Host,
			Port: fmt.Sprint(cfg.Email.Port),
			From: cfg.Email.From,
		}),
	)

	wd, err := os.Getwd()
	if err != nil {
		panic(err)
	}
	outputFile, err := os.Create(wd + "/notification-results.txt")
	if err != nil {
		panic(err)
	}
	defer outputFile.Close()

	// http req
	cli := http.DefaultClient

	parsedURL, err := url.Parse(cfg.Gitea.URL + "/admin/users")
	if err != nil {
		panic(err)
	}

	req, err := http.NewRequestWithContext(ctx, http.MethodGet, parsedURL.String(), http.NoBody)
	if err != nil {
		panic(err)
	}

	req.Header.Add("Authorization", "token "+cfg.Gitea.ApiKey)
	req.Header.Add("Content-Type", "application/json")
	resp, err := cli.Do(req)
	if err != nil {
		panic(err)
	}

	if resp.StatusCode != http.StatusOK {
		bts, _ := io.ReadAll(resp.Body)

		if _, err := outputFile.WriteString(fmt.Sprintf("couln't get users | %d: %s\n", resp.StatusCode, string(bts))); err != nil {
			panic(err)
		}
	}

	bts, err := io.ReadAll(resp.Body)
	if err != nil {
		panic(err)
	}

	var users []struct {
		ID                int       `json:"id"`
		Login             string    `json:"login"`
		LoginName         string    `json:"login_name"`
		FullName          string    `json:"full_name"`
		Email             string    `json:"email"`
		AvatarURL         string    `json:"avatar_url"`
		Language          string    `json:"language"`
		IsAdmin           bool      `json:"is_admin"`
		LastLogin         time.Time `json:"last_login"`
		Created           time.Time `json:"created"`
		Restricted        bool      `json:"restricted"`
		Active            bool      `json:"active"`
		ProhibitLogin     bool      `json:"prohibit_login"`
		Location          string    `json:"location"`
		Website           string    `json:"website"`
		Description       string    `json:"description"`
		Visibility        string    `json:"visibility"`
		FollowersCount    int       `json:"followers_count"`
		FollowingCount    int       `json:"following_count"`
		StarredReposCount int       `json:"starred_repos_count"`
		Username          string    `json:"username"`
	}
	if err := json.Unmarshal(bts, &users); err != nil {
		panic(err)
	}

	// Loop over users and notify
	for _, u := range users {
		emailBody := "HTML MESSAGE"
		// Send the new password via email.
		// if err := ms.SendMsg(email, []byte(fmt.Sprintf("Esta esta es tu nueva contraseña: %s", newPassword))); err != nil {
		if err := ms.Send(
			u.Email,
			"Password changed",
			emailBody,
		); err != nil {
			if _, err := outputFile.WriteString(fmt.Sprintf("Error sending email for user %s: %v", u.Email, err)); err != nil {
				panic(err)
			}
			continue
		}
	}

}

func signalContext(ctx context.Context) context.Context {
	ctx, cancel := context.WithCancel(ctx)

	sigs := make(chan os.Signal, 1)
	signal.Notify(sigs, os.Interrupt, syscall.SIGINT, syscall.SIGTERM)

	go func() {
		<-sigs
		signal.Stop(sigs)
		close(sigs)
		cancel()
	}()

	return ctx
}