package main

import (
	"encoding/json"
	"log"
	"os"
	"path/filepath"
	"reflect"
)

type ConfigConfigure struct {
	AppName       string
	ContainerType ConfigContainerType
	ContainerPath string
	ConfigureFile string
}

func (receiver *ConfigConfigure) Check() {
	if receiver.ContainerType == None {
		log.Fatal("Check, ContainerType should not be None or empty ")
	} else if receiver.ContainerType == BesidesExe {
		// pass
	} else if receiver.ContainerType == UserConfig {
		if receiver.AppName == "" {
			log.Fatal("Check, AppName should not be None while ContainerType == UserConfig")
		}
	} else if receiver.ContainerType == SystemConfig {
		if receiver.AppName == "" {
			log.Fatal("Check, AppName should not be None while ContainerType == SystemConfig\nBesides SystemConfig is not supported for now")
		}
	}
}

func (receiver *ConfigConfigure) MakeupContainerPath() {
	if receiver.ContainerType == None {
		log.Fatal("Error making container path, ContainerType must be specified")
	} else if receiver.ContainerType == BesidesExe {
		receiver.ContainerPath = getConfigContainerBesidesExe()
	} else if receiver.ContainerType == UserConfig {
		receiver.ContainerPath = getConfigContainerUserConfig(receiver.AppName)
	} else if receiver.ContainerType == SystemConfig {
		log.Fatal("Error making container path, SystemConfig is not supported for now")
	}
}

func (receiver *ConfigConfigure) EnsureContainer() {
	if receiver.ContainerPath == "" {
		log.Fatal("Error ensuring container, ContainerPath should not be empty")
	}

	// 检查目录是否存在
	if _, err := os.Stat(receiver.ContainerPath); os.IsNotExist(err) {
		// 如果目录不存在，则创建
		err := os.MkdirAll(receiver.ContainerPath, 0755)
		if err != nil {
			log.Fatal("Failed to create container directory: ", err)
		}
		log.Printf("Container directory created: %s", receiver.ContainerPath)
	} else if err != nil {
		log.Fatal("Failed to check container directory: ", err)
	} else {
		log.Printf("Container directory already exists: %s", receiver.ContainerPath)
	}
}

func (receiver *ConfigConfigure) EnsureConfigure(defaultConfig interface{}) interface{} {
	// makeup config file full path
	configFile := filepath.Join(receiver.ContainerPath, receiver.ConfigureFile)

	// 检查配置文件是否存在
	if _, err := os.Stat(configFile); err == nil {
		// 配置文件存在，读取并反序列化到目标结构体
		data, err := os.ReadFile(configFile)
		if err != nil {
			log.Fatalf("Failed to read config file: %v", err)
		}

		// 使用反射获取 defaultConfig 的类型
		val := reflect.New(reflect.TypeOf(defaultConfig)).Interface()
		if err := json.Unmarshal(data, val); err != nil {
			log.Fatalf("Failed to unmarshal config file: %v", err)
		}
		log.Printf("Loaded config from file: %s", configFile)
		return reflect.ValueOf(val).Elem().Interface()
	} else if os.IsNotExist(err) {
		// 配置文件不存在，保存默认配置到文件
		jsonData, err := json.MarshalIndent(defaultConfig, "", "  ")
		if err != nil {
			log.Fatalf("Error encoding default config: %v", err)
		}
		if err := os.WriteFile(configFile, jsonData, 0644); err != nil {
			log.Fatalf("Failed to write default config to file: %v", err)
		}
		log.Printf("Saved default config to file: %s", configFile)
		return defaultConfig
	} else {
		// 其他错误
		log.Fatalf("Error checking config file: %v", err)
	}
	return defaultConfig
}