package main

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

	"gitea.urkob.com/mcr-swiss/gogstea/kit/config"
)

type user struct {
	ID                int       `json:"id"`
	Login             string    `json:"login"`
	LoginName         string    `json:"login_name"`
	SourceID          int       `json:"source_id"`
	FullName          string    `json:"full_name"`
	Email             string    `json:"email"`
	AvatarURL         string    `json:"avatar_url"`
	HTMLURL           string    `json:"html_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"`
}

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)
	}

	wd, err := os.Getwd()
	if err != nil {
		panic(err)
	}

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

	cli := http.DefaultClient

	parsedURL, err := url.Parse(fmt.Sprintf(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)
	}

	// TODO: see how to pass the admin token if so
	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)

		panic(fmt.Errorf("%d | %s: %w", resp.StatusCode, string(bts), err))
	}

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

	var users []user
	if err := json.Unmarshal(bts, &users); err != nil {
		panic(err)
	}

	for _, u := range users {
		if u.Username == "mcradmin" {
			continue
		}

		// Delete
		parsedURL, err := url.Parse(fmt.Sprintf("%s/admin/users/%s", cfg.Gitea.URL, u.Username))
		if err != nil {
			panic(err)
		}

		req, err := http.NewRequestWithContext(ctx, http.MethodDelete, 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("FAILED %d | %s | %d: %s\n", u.ID, u.Email, resp.StatusCode, string(bts))); err != nil {
				panic(err)
			}
			continue
		}

		if _, err := outputFile.WriteString(fmt.Sprintf("DELETED %d | %s\n", u.ID, u.Email)); err != nil {
			panic(err)
		}
	}
}

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
}