package configs

import (
	"github.com/iwind/TeaGo/Tea"
	"gopkg.in/yaml.v3"
	"os"
	"sync"
)

var (
	brandConfig     *BrandConfig
	brandConfigOnce sync.Once
)

// BrandConfig 品牌配置
type BrandConfig struct {
	OfficialSite       string `yaml:"officialSite" json:"officialSite"`
	DocsSite           string `yaml:"docsSite" json:"docsSite"`
	DocsPathPrefix     string `yaml:"docsPathPrefix" json:"docsPathPrefix"`
	DefaultInstallPath string `yaml:"defaultInstallPath" json:"defaultInstallPath"`
	ProductName        string `yaml:"productName" json:"productName"`
}

// GetBrandConfig 获取品牌配置
func GetBrandConfig() *BrandConfig {
	brandConfigOnce.Do(func() {
		brandConfig = loadBrandConfig()
	})
	return brandConfig
}

func loadBrandConfig() *BrandConfig {
	config := &BrandConfig{
		OfficialSite:       getEnvOrDefault("BRAND_OFFICIAL_SITE", "https://goedge.cn"),
		DocsSite:           getEnvOrDefault("BRAND_DOCS_SITE", "https://goedge.cn"),
		DocsPathPrefix:     getEnvOrDefault("BRAND_DOCS_PREFIX", "/docs"),
		DefaultInstallPath: getEnvOrDefault("BRAND_INSTALL_PATH", "/usr/local/goedge"),
		ProductName:        getEnvOrDefault("BRAND_PRODUCT_NAME", "GoEdge"),
	}

	// 从配置文件加载
	configFile := Tea.ConfigFile("brand.yaml")
	if data, err := os.ReadFile(configFile); err == nil {
		var fileConfig struct {
			Brand BrandConfig `yaml:"brand"`
		}
		if err := yaml.Unmarshal(data, &fileConfig); err == nil {
			if fileConfig.Brand.OfficialSite != "" {
				config.OfficialSite = fileConfig.Brand.OfficialSite
			}
			if fileConfig.Brand.DocsSite != "" {
				config.DocsSite = fileConfig.Brand.DocsSite
			}
			if fileConfig.Brand.DocsPathPrefix != "" {
				config.DocsPathPrefix = fileConfig.Brand.DocsPathPrefix
			}
			if fileConfig.Brand.DefaultInstallPath != "" {
				config.DefaultInstallPath = fileConfig.Brand.DefaultInstallPath
			}
			if fileConfig.Brand.ProductName != "" {
				config.ProductName = fileConfig.Brand.ProductName
			}
		}
	}

	return config
}

// GetDocsURL 获取文档 URL
func (c *BrandConfig) GetDocsURL(path string) string {
	if len(path) > 0 && path[0] != '/' {
		path = "/" + path
	}
	return c.DocsSite + c.DocsPathPrefix + path
}

// GetFullDocsURL 获取完整文档 URL
func (c *BrandConfig) GetFullDocsURL(path string) string {
	return c.GetDocsURL(path)
}

// ToMap 转换为 map（用于前端）
func (c *BrandConfig) ToMap() map[string]interface{} {
	return map[string]interface{}{
		"officialSite":       c.OfficialSite,
		"docsSite":           c.DocsSite,
		"docsPathPrefix":     c.DocsPathPrefix,
		"defaultInstallPath": c.DefaultInstallPath,
		"productName":        c.ProductName,
	}
}

func getEnvOrDefault(key, defaultValue string) string {
	if value := os.Getenv(key); value != "" {
		return value
	}
	return defaultValue
}