package models

import (
	"encoding/json"
	"time"
)

// ConfigTemplateBuilder 配置模板建造者
type ConfigTemplateBuilder struct {
	templates []*ConfigTemplate
	current   *ConfigTemplate
}

// NewConfigTemplateBuilder 创建配置模板建造者
func NewConfigTemplateBuilder() *ConfigTemplateBuilder {
	return &ConfigTemplateBuilder{
		templates: make([]*ConfigTemplate, 0),
	}
}

// StartTemplate 开始创建新模板
func (b *ConfigTemplateBuilder) StartTemplate(name, rootKey, description string) *ConfigTemplateBuilder {
	b.current = &ConfigTemplate{
		TemplateName: name,
		YamlRootKey:  rootKey,
		Description:  description,
		IsDefault:    true,
		SortOrder:    len(b.templates) + 1,
		Creator:      "system",
		CreatedAt:    time.Now(),
		UpdatedAt:    time.Now(),
		Details:      make([]ConfigTemplateDetail, 0),
	}
	return b
}

// AddInt 添加整型配置项
func (b *ConfigTemplateBuilder) AddInt(key, description string) *DetailBuilder {
	return b.addDetail(key, description, "number", "int")
}

// AddString 添加字符串配置项
func (b *ConfigTemplateBuilder) AddString(key, description string) *DetailBuilder {
	return b.addDetail(key, description, "string", "string")
}

// AddBoolean 添加布尔型配置项
func (b *ConfigTemplateBuilder) AddBoolean(key, description string) *DetailBuilder {
	return b.addDetail(key, description, "boolean", "boolean")
}

// AddEnum 添加枚举型配置项
func (b *ConfigTemplateBuilder) AddEnum(key, description string, enumValues []string) *DetailBuilder {
	db := b.addDetail(key, description, "string", "string")
	db.detail.ValidationRules = func() string {
		rules := ValidationRules{
			EnumValues: enumValues,
		}
		b, _ := json.Marshal(rules)
		return string(b)
	}()
	return db
}

// FinishTemplate 完成当前模板创建
func (b *ConfigTemplateBuilder) FinishTemplate() *ConfigTemplateBuilder {
	if b.current != nil {
		b.templates = append(b.templates, b.current)
		b.current = nil
	}
	return b
}

// GetTemplates 获取所有模板
func (b *ConfigTemplateBuilder) GetTemplates() []*ConfigTemplate {
	return b.templates
}

// // BuildSampleTemplates 构建示例模板
// func (b *ConfigTemplateBuilder) BuildSampleTemplates() *ConfigTemplateBuilder {
// 	// Service模板
// 	b.StartTemplate("Service配置", "service", "服务基础配置").
// 		AddInt("port", "服务监听端口").Default("8080").Min(1024).Max(65535).Required().FinishDetail().
// 		AddString("service_name", "服务名称").Default("svc-configure").Pattern("^[a-zA-Z][a-zA-Z0-9_-]*$").Required().FinishDetail().
// 		AddString("instance_name", "实例名称").Default("svc-configure-01").Required().FinishDetail().
// 		AddInt("read_timeout", "读取超时时间（秒）").Default("30").Min(1).Max(300).Required().FinishDetail().
// 		AddInt("write_timeout", "写入超时时间（秒）").Default("30").Min(1).Max(300).Required().FinishDetail().
// 		AddInt("idle_timeout", "空闲超时时间（秒）").Default("60").Min(10).Max(600).Required().FinishDetail().
// 		FinishTemplate()

// 	// Log模板
// 	b.StartTemplate("日志配置", "log", "日志相关配置").
// 		AddEnum("level", "日志级别", []string{"debug", "info", "warn", "error", "fatal"}).Default("debug").Required().FinishDetail().
// 		AddString("output", "日志输出目标").Default("console,file").FinishDetail().
// 		AddBoolean("json_format", "是否以JSON格式输出日志").Default("true").FinishDetail().
// 		FinishTemplate()

// 	// Doris模板
// 	b.StartTemplate("Doris配置", "doris", "Doris数据库连接配置").
// 		AddString("fe_host", "Doris FE节点主机地址").Default("161.189.89.196").Pattern(`^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$`).Required().FinishDetail().
// 		AddInt("fe_port", "Doris FE端口号").Default("8040").Min(1).Max(65535).Required().FinishDetail().
// 		AddString("fe_username", "Doris FE用户名").Default("root").Required().FinishDetail().
// 		AddString("fe_password", "Doris FE密码").Default("mos8555").Sensitive().Required().MinLength(6).MaxLength(100).FinishDetail().
// 		AddInt("stream_load_timeout", "Stream Load超时时间（秒）").Default("300").Min(10).Max(3600).FinishDetail().
// 		AddInt("batch_size", "批量大小").Default("1000").Min(1).Max(10000).FinishDetail().
// 		FinishTemplate()

// 	return b
// }

// 私有方法
func (b *ConfigTemplateBuilder) addDetail(key, description, valueType, dataType string) *DetailBuilder {
	if b.current == nil {
		b.StartTemplate("未命名模板", "untitled", "未描述模板")
	}

	detail := ConfigTemplateDetail{
		ConfigKey:   key,
		Description: description,
		ValueType:   valueType,
		DataType:    dataType,
		IsRequired:  false,
		IsSensitive: false,
		IsReadonly:  false,
		SortOrder:   len(b.current.Details) + 1,
		Creator:     "system",
		CreatedAt:   time.Now(),
		UpdatedAt:   time.Now(),
	}

	return &DetailBuilder{
		builder: b,
		detail:  detail,
	}
}

// DetailBuilder 配置详情建造者
type DetailBuilder struct {
	builder *ConfigTemplateBuilder
	detail  ConfigTemplateDetail
}

// Default 设置默认值
func (db *DetailBuilder) Default(value string) *DetailBuilder {
	db.detail.DefaultValue = value
	db.detail.ConfigValue = value
	return db
}

// Required 设置为必填项
func (db *DetailBuilder) Required() *DetailBuilder {
	db.detail.IsRequired = true
	return db
}

// Sensitive 设置为敏感信息
func (db *DetailBuilder) Sensitive() *DetailBuilder {
	db.detail.IsSensitive = true
	return db
}

// Readonly 设置为只读
func (db *DetailBuilder) Readonly() *DetailBuilder {
	db.detail.IsReadonly = true
	return db
}

// Min 设置最小值
func (db *DetailBuilder) Min(min float64) *DetailBuilder {
	db.addValidation(func(r *ValidationRules) {
		r.Min = &min
	})
	return db
}

// Max 设置最大值
func (db *DetailBuilder) Max(max float64) *DetailBuilder {
	db.addValidation(func(r *ValidationRules) {
		r.Max = &max
	})
	return db
}

// MinLength 设置最小长度
func (db *DetailBuilder) MinLength(length int) *DetailBuilder {
	db.addValidation(func(r *ValidationRules) {
		r.MinLength = &length
	})
	return db
}

// MaxLength 设置最大长度
func (db *DetailBuilder) MaxLength(length int) *DetailBuilder {
	db.addValidation(func(r *ValidationRules) {
		r.MaxLength = &length
	})
	return db
}

// Pattern 设置正则表达式
func (db *DetailBuilder) Pattern(pattern string) *DetailBuilder {
	db.addValidation(func(r *ValidationRules) {
		r.Pattern = pattern
	})
	return db
}

// Message 设置验证错误消息
func (db *DetailBuilder) Message(msg string) *DetailBuilder {
	db.addValidation(func(r *ValidationRules) {
		r.Message = msg
	})
	return db
}

// FinishDetail 完成当前详情项
func (db *DetailBuilder) FinishDetail() *ConfigTemplateBuilder {
	db.builder.current.Details = append(db.builder.current.Details, db.detail)
	return db.builder
}

// 私有方法
func (db *DetailBuilder) addValidation(fn func(*ValidationRules)) {
	var rules ValidationRules
	if db.detail.ValidationRules != "" {
		json.Unmarshal([]byte(db.detail.ValidationRules), &rules)
	}
	fn(&rules)
	b, _ := json.Marshal(rules)
	db.detail.ValidationRules = string(b)
}

// 使用示例
func CreateSampleConfigTemplates() []*ConfigTemplate {
	builder := NewConfigTemplateBuilder()
	//builder.BuildSampleTemplates()
	return builder.GetTemplates()
}

// 更简洁的使用示例
func CreateConfigTemplates() []*ConfigTemplate {
	builder := NewConfigTemplateBuilder()

	// Service模板 - 更简洁的写法
	builder.StartTemplate("Service配置", "service", "服务基础配置")
	builder.AddInt("port", "服务监听端口").Default("8080").Min(1024).Max(65535).Required().FinishDetail()
	builder.AddString("service_name", "服务名称").Default("svc-configure").Required().FinishDetail()
	builder.FinishTemplate()

	// Log模板
	builder.StartTemplate("日志配置", "log", "日志相关配置")
	builder.AddEnum("level", "日志级别", []string{"debug", "info", "warn", "error", "fatal"}).Default("debug").Required().FinishDetail()
	builder.AddString("output", "日志输出").Default("console,file").FinishDetail()
	builder.FinishTemplate()

	// Doris模板
	builder.StartTemplate("Doris配置", "doris", "Doris连接配置")
	builder.AddString("fe_host", "FE主机").Default("localhost").Required().FinishDetail()
	builder.AddString("fe_password", "密码").Sensitive().Required().FinishDetail()
	builder.FinishTemplate()

	return builder.GetTemplates()
}