package config

import (
	"embed"
	"fmt"
	"gitee.com/quant1x/gox/api"
	"gitee.com/quant1x/gox/logger"
	"gitee.com/quant1x/gox/util/homedir"
	"gitee.com/quant1x/pkg/yaml"
	"os"
	"strings"
)

const (
	// ResourcesPath 资源路径
	ResourcesPath = "resources"
)

//go:embed resources/*
var resources embed.FS

// 配置常量
const (
	// 配置文件名
	configFilename = "quant1x.yaml"
)

var (
	quant1XConfigFilename = "" // 配置文件完整路径
	listConfigFile        = []string{
		"~/." + configFilename,
		"~/.quant1x/" + configFilename,
		"~/runtime/etc/" + configFilename,
	}
)

// Quant1XConfig Quant1X基础配置
type Quant1XConfig struct {
	BaseDir string           `yaml:"basedir"` // 基础路径
	Data    DataParameter    `yaml:"data"`    // 数据源
	Runtime RuntimeParameter `yaml:"runtime"` // 运行时参数
	Trader  TraderParameter  `yaml:"trader"`  // 预览交易参数
}

// GetConfigFilename 获取配置文件路径
func GetConfigFilename() string {
	return quant1XConfigFilename
}

var (
	// GlobalConfig engine配置信息
	GlobalConfig Quant1XConfig
)

// LoadConfig 加载配置文件
func LoadConfig() (config Quant1XConfig, found bool) {
	for _, v := range listConfigFile {
		filename, err := homedir.Expand(v)
		if err != nil {
			continue
		}
		if !api.FileExist(filename) {
			continue
		}
		err = parseYamlConfig(filename, &config)
		if err != nil {
			logger.Fatalf("%+v", err)
		}
		found = true
		break
	}
	return
}

// ReadConfig 读取配置文件
func ReadConfig(rootPath string) (config Quant1XConfig) {
	target := GetConfigFilename()
	// 如果文件不存在, 导出默认配置
	if !api.FileExist(target) {
		target = rootPath + "/" + configFilename
		target, _ = homedir.Expand(target)
		filename := fmt.Sprintf("%s/%s", ResourcesPath, configFilename)
		_ = api.Export(resources, filename, target)
	}
	err := parseYamlConfig(target, &config)
	if err != nil {
		logger.Fatalf("%+v", err)
	}
	return
}

func parseYamlConfig(filename string, config *Quant1XConfig) error {
	if api.FileExist(filename) {
		dataBytes, err := os.ReadFile(filename)
		if err != nil {
			logger.Error(err)
			return err
		}
		err = yaml.Unmarshal(dataBytes, config)
		if err != nil {
			logger.Error(err)
			return err
		}
		config.BaseDir = strings.TrimSpace(config.BaseDir)
		if len(config.BaseDir) > 0 {
			quant1XConfigFilename = filename
		}
	}
	return nil
}