package config

import (
	"bytes"
	"encoding/json"
	"os"
	"strings"
)

type Config struct {
	Path         string            `json:"-"`
	Token        string            `json:"token"`
	Debug        bool              `json:"debug"`
	ExtraDomains map[string]string `json:"extraDomains"`
	TlsCertPath  string            `json:"tlsCertPath"`
	TlsKeyPath   string            `json:"tlsKeyPath"`
	Host         string            `json:"host"`
	TlsHost      string            `json:"tlsHost"`
	AntiGateV2   struct {
		TurnstileUserAgent string `json:"turnstileUserAgent"`
		Ip                 string `json:"ip"`
	} `json:"AntiGateV2"`
}

func Default() *Config {
	return &Config{
		Path:         "./data/config.json",
		Token:        "",
		Debug:        false,
		ExtraDomains: map[string]string{},
		TlsCertPath:  "./data/ca.crt",
		TlsKeyPath:   "./data/ca.key",
		Host:         "127.0.0.1:80",
		TlsHost:      "127.0.0.1:443",
		AntiGateV2: struct {
			TurnstileUserAgent string `json:"turnstileUserAgent"`
			Ip                 string `json:"ip"`
		}{
			"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Safari/537.36",
			"127.0.0.1",
		},
	}
}

func (c *Config) Load() error {
	raw, err := os.ReadFile(c.Path)
	if err != nil {
		return err
	}

	if err := json.Unmarshal(raw, c); err != nil {
		return err
	}

	// format config, if it isn't properly formatted
	// also it merges user's config with our defaults
	marshaled, err := json.MarshalIndent(c, "", "\t")
	if err != nil {
		return err
	}

	if bytes.Compare(raw, marshaled) != 0 {
		if err := os.WriteFile(c.Path, marshaled, 0600); err != nil {
			return err
		}
	}

	return nil
}

func (c *Config) Save() error {

	dir := c.Path
	// converts "./user/config.json" to "./user"
	if i := strings.LastIndex(dir, "/"); i != -1 {
		dir = dir[0:i]
	}
	if err := os.MkdirAll(dir, 0700); err != nil {
		return err
	}

	marshaled, err := json.MarshalIndent(c, "", "\t")
	if err != nil {
		return err
	}

	return os.WriteFile(c.Path, marshaled, 0600)
}