package serverconfigs

import (
	"github.com/TeaOSLab/EdgeCommon/pkg/serverconfigs/shared"
)

// AccessLogStorageType 访问日志存储类型（含「存储+写入目标」组合）
type AccessLogStorageType = string

const (
	AccessLogStorageTypeFile                AccessLogStorageType = "file"
	AccessLogStorageTypeFileMySQL           AccessLogStorageType = "file_mysql"
	AccessLogStorageTypeFileClickhouse      AccessLogStorageType = "file_clickhouse"
	AccessLogStorageTypeFileMySQLClickhouse AccessLogStorageType = "file_mysql_clickhouse"
	AccessLogStorageTypeES                  AccessLogStorageType = "es"
	AccessLogStorageTypeTCP                 AccessLogStorageType = "tcp"
	AccessLogStorageTypeSyslog              AccessLogStorageType = "syslog"
	AccessLogStorageTypeCommand             AccessLogStorageType = "command"
)

// FindAllAccessLogStorageTypes 所有存储引擎列表（含写入目标组合：文件、文件+MySQL、文件+ClickHouse 等）
func FindAllAccessLogStorageTypes() []*shared.Definition {
	return []*shared.Definition{
		{Name: "文件", Code: AccessLogStorageTypeFile, Description: "节点写本地 JSON 文件"},
		{Name: "文件+MySQL", Code: AccessLogStorageTypeFileMySQL, Description: "节点写文件 + API 写 MySQL"},
		{Name: "文件+ClickHouse", Code: AccessLogStorageTypeFileClickhouse, Description: "节点写文件 + 落 ClickHouse（Fluent Bit 或 API 直写）"},
		{Name: "文件+MySQL+ClickHouse", Code: AccessLogStorageTypeFileMySQLClickhouse, Description: "节点写文件 + API 写 MySQL + ClickHouse"},
		{Name: "ElasticSearch", Code: AccessLogStorageTypeES, Description: "将日志存储在ElasticSearch中"},
		{Name: "TCP Socket", Code: AccessLogStorageTypeTCP, Description: "将日志通过TCP套接字输出"},
		{Name: "Syslog", Code: AccessLogStorageTypeSyslog, Description: "将日志通过syslog输出，仅支持Linux"},
		{Name: "命令行输入流", Code: AccessLogStorageTypeCommand, Description: "启动一个命令通过读取stdin接收日志信息"},
	}
}

// FindAccessLogStorageTypeName 根据类型查找名称
func FindAccessLogStorageTypeName(storageType string) string {
	for _, m := range FindAllAccessLogStorageTypes() {
		if m.Code == storageType {
			return m.Name
		}
	}
	return ""
}

// IsFileBasedStorageType 是否为基于文件的存储（需要显示文件路径等配置）
func IsFileBasedStorageType(code string) bool {
	switch code {
	case AccessLogStorageTypeFile, AccessLogStorageTypeFileMySQL, AccessLogStorageTypeFileClickhouse, AccessLogStorageTypeFileMySQLClickhouse:
		return true
	default:
		return false
	}
}

// NormalizeAccessLogStorageType 统一存储类型编码（兼容历史别名）。
func NormalizeAccessLogStorageType(storageType string) string {
	switch storageType {
	case "clickhouse":
		return AccessLogStorageTypeFileClickhouse
	case "mysql_clickhouse":
		return AccessLogStorageTypeFileMySQLClickhouse
	default:
		return storageType
	}
}

// BuildWriteTargetsByStorageType 按 type（唯一真源）构建写入目标。
// disableDefaultDB 用于控制是否保留 MySQL 写入。
func BuildWriteTargetsByStorageType(storageType string, disableDefaultDB bool) *AccessLogWriteTargets {
	storageType = NormalizeAccessLogStorageType(storageType)

	targets := &AccessLogWriteTargets{}
	switch storageType {
	case AccessLogStorageTypeFile:
		targets.File = true
	case AccessLogStorageTypeFileMySQL:
		targets.File = true
		targets.MySQL = true
	case AccessLogStorageTypeFileClickhouse:
		targets.File = true
		targets.ClickHouse = true
	case AccessLogStorageTypeFileMySQLClickhouse:
		targets.File = true
		targets.MySQL = true
		targets.ClickHouse = true
	case AccessLogStorageTypeES, AccessLogStorageTypeTCP, AccessLogStorageTypeSyslog, AccessLogStorageTypeCommand:
		// 保持现有兼容语义：非 file 类型默认写 MySQL（除非停用默认数据库）
		targets.MySQL = true
	default:
		// 兜底保持可用
		targets.File = true
		targets.MySQL = true
	}

	if disableDefaultDB {
		targets.MySQL = false
	}

	if !targets.File && !targets.MySQL && !targets.ClickHouse {
		targets.File = true
	}
	return targets
}

// ParseStorageTypeAndWriteTargets 从下拉框选中的类型解析出「实际存储类型」与「写入目标」
// 用于创建/更新策略：options 按 baseType 填（如 file），writeTargets 按组合填。
func ParseStorageTypeAndWriteTargets(selectedType string) (baseType string, writeTargets *AccessLogWriteTargets) {
	selectedType = NormalizeAccessLogStorageType(selectedType)
	writeTargets = &AccessLogWriteTargets{}
	switch selectedType {
	case AccessLogStorageTypeFile:
		baseType = AccessLogStorageTypeFile
		writeTargets.File = true
	case AccessLogStorageTypeFileMySQL:
		baseType = AccessLogStorageTypeFile
		writeTargets.File = true
		writeTargets.MySQL = true
	case AccessLogStorageTypeFileClickhouse:
		baseType = AccessLogStorageTypeFile
		writeTargets.File = true
		writeTargets.ClickHouse = true
	case AccessLogStorageTypeFileMySQLClickhouse:
		baseType = AccessLogStorageTypeFile
		writeTargets.File = true
		writeTargets.MySQL = true
		writeTargets.ClickHouse = true
	case AccessLogStorageTypeES, AccessLogStorageTypeTCP, AccessLogStorageTypeSyslog, AccessLogStorageTypeCommand:
		baseType = selectedType
		writeTargets.MySQL = true
	default:
		baseType = selectedType
		writeTargets.File = true
		writeTargets.MySQL = true
	}
	return baseType, writeTargets
}

// ComposeStorageTypeDisplay 根据策略的 Type + WriteTargets 得到下拉框显示用的类型 code（用于编辑页回显）
func ComposeStorageTypeDisplay(policyType string, writeTargets *AccessLogWriteTargets) string {
	policyType = NormalizeAccessLogStorageType(policyType)
	if policyType != AccessLogStorageTypeFile {
		return policyType
	}
	if writeTargets == nil {
		return AccessLogStorageTypeFile
	}
	if writeTargets.File && writeTargets.MySQL && writeTargets.ClickHouse {
		return AccessLogStorageTypeFileMySQLClickhouse
	}
	if writeTargets.File && writeTargets.MySQL {
		return AccessLogStorageTypeFileMySQL
	}
	if writeTargets.File && writeTargets.ClickHouse {
		return AccessLogStorageTypeFileClickhouse
	}
	return AccessLogStorageTypeFile
}