package kvm

import (
	"encoding/json"
	"fmt"
	"os"
)

type WakeOnLanDevice struct {
	Name       string `json:"name"`
	MacAddress string `json:"macAddress"`
}

type UsbConfig struct {
	UsbVendorId     string `json:"usb_vendor_id"`
	UsbProductId    string `json:"usb_product_id"`
	UsbSerialNumber string `json:"usb_serial_number"`
	UsbManufacturer string `json:"usb_manufacturer"`
	UsbProduct      string `json:"usb_product"`
}

type Config struct {
	CloudURL          string            `json:"cloud_url"`
	CloudToken        string            `json:"cloud_token"`
	GoogleIdentity    string            `json:"google_identity"`
	JigglerEnabled    bool              `json:"jiggler_enabled"`
	AutoUpdateEnabled bool              `json:"auto_update_enabled"`
	IncludePreRelease bool              `json:"include_pre_release"`
	HashedPassword    string            `json:"hashed_password"`
	LocalAuthToken    string            `json:"local_auth_token"`
	LocalAuthMode     string            `json:"localAuthMode"` //TODO: fix it with migration
	WakeOnLanDevices  []WakeOnLanDevice `json:"wake_on_lan_devices"`
	UsbConfig         UsbConfig         `json:"usb_config"`
}

const configPath = "/userdata/kvm_config.json"

var defaultConfig = &Config{
	CloudURL:          "https://api.jetkvm.com",
	AutoUpdateEnabled: true, // Set a default value
	UsbConfig: UsbConfig{
		UsbVendorId:     "0x1d6b", //The Linux Foundation
		UsbProductId:    "0x0104", //Multifunction Composite Gadget¬
		UsbSerialNumber: "",
		UsbManufacturer: "JetKVM",
		UsbProduct:      "JetKVM USB Emulation Device",
	},
}

var config *Config

func LoadConfig() {
	if config != nil {
		return
	}

	file, err := os.Open(configPath)
	if err != nil {
		logger.Debug("default config file doesn't exist, using default")
		config = defaultConfig
		return
	}
	defer file.Close()

	var loadedConfig Config
	if err := json.NewDecoder(file).Decode(&loadedConfig); err != nil {
		logger.Errorf("config file JSON parsing failed, %v", err)
		config = defaultConfig
		return
	}

	config = &loadedConfig
}

func SaveConfig() error {
	file, err := os.Create(configPath)
	if err != nil {
		return fmt.Errorf("failed to create config file: %w", err)
	}
	defer file.Close()

	encoder := json.NewEncoder(file)
	encoder.SetIndent("", "  ")
	if err := encoder.Encode(config); err != nil {
		return fmt.Errorf("failed to encode config: %w", err)
	}

	return nil
}