package config

import (
	"fmt"
	"sync"
	"time"

	"github.com/spf13/viper"
	"gorm.io/driver/mysql"
)

// DatabaseConfig 数据库配置
type DatabaseConfig struct {
	DSN          string `mapstructure:"dsn"`
	MaxIdleConns int    `mapstructure:"maxIdleConns"`
	MaxOpenConns int    `mapstructure:"maxOpenConns"`
	LogLevel     string `mapstructure:"logLevel"`
}

// ServerConfig 服务器配置
type ServerConfig struct {
	Addr string `mapstructure:"addr"`
	Port int    `mapstructure:"port"`
}

// GatewayConfig 网关配置
type GatewayConfig struct {
	BaseURL string            `mapstructure:"base_url"`
	Timeout int               `mapstructure:"timeout"`
	Auth    GatewayAuthConfig `mapstructure:"auth"`
}

// GatewayAuthConfig 网关鉴权配置
type GatewayAuthConfig struct {
	LoginURL string `mapstructure:"login_url"`
	Key      string `mapstructure:"key"`
}

// SSOConfig SSO配置
type SSOConfig struct {
	SSOServerURL string        `mapstructure:"sso_server_url"`
	ClientID     string        `mapstructure:"client_id"`
	ClientSecret string        `mapstructure:"client_secret"`
	RedirectURI  string        `mapstructure:"redirect_uri"`
	Scope        string        `mapstructure:"scope"`
	ResourceAud  string        `mapstructure:"resource_aud"`
	AdminToken   string        `mapstructure:"admin_token"`
	Timeout      time.Duration `mapstructure:"timeout"`
}

// MessagePushConfig 消息推送配置
type MessagePushConfig struct {
	GoalfyMaxBaseURL string `mapstructure:"goalfymax_base_url"`
	Timeout          int    `mapstructure:"timeout"`
	RetryCount       int    `mapstructure:"retry_count"`
	RetryInterval    int    `mapstructure:"retry_interval"`
}

// AlertConfig 告警配置
type AlertConfig struct {
	DingTalk DingTalkConfig `mapstructure:"dingtalk"`
}

// DingTalkConfig 钉钉配置
type DingTalkConfig struct {
	Enabled        bool   `mapstructure:"enabled"`
	Webhook        string `mapstructure:"webhook"`
	Secret         string `mapstructure:"secret"`
	TimeoutSeconds int    `mapstructure:"timeout_seconds"`
	Keyword        string `mapstructure:"keyword"`
}

// PayConfig 支付服务配置
type PayConfig struct {
	BaseURL string `mapstructure:"base_url"`
	Timeout int    `mapstructure:"timeout"`
}

// OssConfig 对象存储（S3兼容）配置
type OssConfig struct {
	Endpoint         string        `mapstructure:"endpoint"`
	Region           string        `mapstructure:"region"`
	AccessKeyID      string        `mapstructure:"access_key_id"`
	AccessKeySecret  string        `mapstructure:"access_key_secret"`
	Bucket           string        `mapstructure:"bucket"`
	UploadMaxSize    int64         `mapstructure:"upload_max_size"` // 上传文件最大大小(字节)
	AssumeRoleArn    string        `mapstructure:"assume_role_arn"` // AWS S3专用,阿里云不需要
	PresignUrlExpire time.Duration `mapstructure:"presign_url_expire"`
}

// RedisConfig Redis配置
type RedisConfig struct {
	Addr     string `mapstructure:"addr"`
	Password string `mapstructure:"password"`
	DB       int    `mapstructure:"db"`
}

// EmailConfig 邮件配置
type EmailConfig struct {
	Sender          string `mapstructure:"sender"`
	Host            string `mapstructure:"host"`
	Port            int    `mapstructure:"port"`
	Username        string `mapstructure:"username"`
	Password        string `mapstructure:"password"`
	InviteURLPrefix string `mapstructure:"invite_url_prefix"`
}

// Config 定义总配置结构
type Config struct {
	Server      ServerConfig      `mapstructure:"server"`
	Database    DatabaseConfig    `mapstructure:"database"`
	Gateway     GatewayConfig     `mapstructure:"gateway"`
	SSO         SSOConfig         `mapstructure:"sso"`
	MessagePush MessagePushConfig `mapstructure:"message_push"`
	Alert       AlertConfig       `mapstructure:"alert"`
	Oss         OssConfig         `mapstructure:"oss"`
	Redis       RedisConfig       `mapstructure:"redis"`
	Email       EmailConfig       `mapstructure:"email"`
	Log         LogConfig         `mapstructure:"log"`
	Client      ClientConfig      `mapstructure:"client"`
	PostgreSQL  PostgreSQLConfig  `mapstructure:"postgresql"`
	Pay         PayConfig         `mapstructure:"pay"`
	Jobs        JobsConfig        `mapstructure:"jobs"`
}

// LogConfig 日志配置
type LogConfig struct {
	Level  string `mapstructure:"level"`
	Format string `mapstructure:"format"`
	Output string `mapstructure:"output"`
}

// ClientOption 客户端选项
type ClientOption struct {
	Key   string `mapstructure:"key" json:"key"`
	Value string `mapstructure:"value" json:"value"`
	Label string `json:"label"` // 用于前端展示，格式：key+value
}

// ClientConfig 客户端配置
type ClientConfig struct {
	Options []ClientOption `mapstructure:"options"`
}

// PostgreSQLConfig PG配置
type PostgreSQLConfig struct {
	DSN             string        `mapstructure:"dsn"`
	Host            string        `mapstructure:"host"`
	Port            int           `mapstructure:"port"`
	User            string        `mapstructure:"user"`
	Password        string        `mapstructure:"password"`
	DBName          string        `mapstructure:"dbname"`
	SSLMode         string        `mapstructure:"sslmode"`
	MaxOpenConns    int           `mapstructure:"max_open_conns"`
	MaxIdleConns    int           `mapstructure:"max_idle_conns"`
	ConnMaxLifetime time.Duration `mapstructure:"conn_max_lifetime"`
	ConnMaxIdleTime time.Duration `mapstructure:"conn_max_idle_time"`
}

type JobsConfig struct {
	McpUsageBalance   McpUsageBalanceJobConfig   `mapstructure:"mcp_usage_balance"`
	ModelTokenBalance ModelTokenBalanceJobConfig `mapstructure:"model_token_balance"`
}

type McpUsageBalanceJobConfig struct {
	Enabled      bool `mapstructure:"enabled"`
	RunOnStartup bool `mapstructure:"run_on_startup"`
	DelayMinutes int  `mapstructure:"delay_minutes"`
}

type ModelTokenBalanceJobConfig struct {
	Enabled      bool `mapstructure:"enabled"`
	RunOnStartup bool `mapstructure:"run_on_startup"`
	DelayMinutes int  `mapstructure:"delay_minutes"`
}

func (j JobsConfig) IsMcpUsageEnabled() bool {
	return j.McpUsageBalance.Enabled
}

var (
	config     *Config
	configLock sync.RWMutex
)

// LoadConfig 从文件加载配置
func LoadConfig(path string) error {
	fmt.Printf("Loading config from %s\n", path)
	viper.SetConfigFile(path)
	err := viper.ReadInConfig()
	if err != nil {
		return fmt.Errorf("读取配置文件失败: %w", err)
	}

	if err := viper.Unmarshal(&config); err != nil {
		return fmt.Errorf("解析配置文件失败: %w", err)
	}

	// 设置默认值
	if config.Server.Addr == "" {
		config.Server.Addr = "0.0.0.0"
	}
	if config.Server.Port == 0 {
		config.Server.Port = 8080
	}
	if config.Database.MaxIdleConns == 0 {
		config.Database.MaxIdleConns = 10
	}
	if config.Database.MaxOpenConns == 0 {
		config.Database.MaxOpenConns = 100
	}
	if config.Database.LogLevel == "" {
		config.Database.LogLevel = "info"
	}
	if config.Log.Level == "" {
		config.Log.Level = "info"
	}
	if config.Log.Format == "" {
		config.Log.Format = "json"
	}
	if config.Log.Output == "" {
		config.Log.Output = "stdout"
	}
	if config.Jobs.McpUsageBalance.DelayMinutes <= 0 {
		config.Jobs.McpUsageBalance.DelayMinutes = 5
	}
	if config.Jobs.ModelTokenBalance.DelayMinutes <= 0 {
		config.Jobs.ModelTokenBalance.DelayMinutes = 5
	}
	if config.Gateway.BaseURL == "" {
		config.Gateway.BaseURL = "http://localhost:8080"
	}
	if config.Gateway.Timeout == 0 {
		config.Gateway.Timeout = 30
	}
	if config.Gateway.Auth.LoginURL == "" {
		config.Gateway.Auth.LoginURL = "http://44.247.156.94:8080/aigateway-admin/api/login"
	}
	if config.Gateway.Auth.Key == "" {
		config.Gateway.Auth.Key = "Jiahe.123"
	}
	if config.MessagePush.GoalfyMaxBaseURL == "" {
		config.MessagePush.GoalfyMaxBaseURL = "http://goalfymax-backend:8080"
	}
	if config.MessagePush.Timeout == 0 {
		config.MessagePush.Timeout = 30
	}
	if config.MessagePush.RetryCount == 0 {
		config.MessagePush.RetryCount = 3
	}
	if config.MessagePush.RetryInterval == 0 {
		config.MessagePush.RetryInterval = 1000
	}
	if config.Pay.BaseURL == "" {
		config.Pay.BaseURL = "http://goalfy-pay:8080"
	}
	if config.Pay.Timeout == 0 {
		config.Pay.Timeout = 30
	}
	if config.Redis.Addr == "" {
		config.Redis.Addr = "localhost:6379"
	}
	if config.Redis.DB == 0 {
		config.Redis.DB = 0
	}

	// OSS 预签名默认过期时间
	if config.Oss.PresignUrlExpire == 0 {
		config.Oss.PresignUrlExpire = 10 * time.Minute
	}

	if config.Alert.DingTalk.TimeoutSeconds <= 0 {
		config.Alert.DingTalk.TimeoutSeconds = 5
	}

	// 设置客户端默认选项
	if len(config.Client.Options) == 0 {
		config.Client.Options = []ClientOption{
			{Key: "5hNXkkkVPfFWUjRvzVP23w", Value: "https://ob-staging-goalfymax.goalfyai.com/"},
			{Key: "J10f8yxU1XDl1Tn00MXKeA", Value: "https://staging-goalfymax.goalfyai.com/"},
			{Key: "xRpT9mgNpt2YvoY9z4FToA", Value: "https://goalfymax.goalfyai.com/"},
		}
	}

	// 为每个客户端选项生成 label
	for i := range config.Client.Options {
		config.Client.Options[i].Label = config.Client.Options[i].Key + "+" + config.Client.Options[i].Value
	}

	return nil
}

// GetConfig 获取当前配置
func GetConfig() *Config {
	configLock.RLock()
	defer configLock.RUnlock()
	return config
}

// GetDatabaseConfig 获取数据库配置
func GetDatabaseConfig() mysql.Config {
	cfg := GetConfig()
	return mysql.Config{
		DSN: cfg.Database.DSN,
	}
}

// GetClientOptions 获取客户端选项列表
func GetClientOptions() []ClientOption {
	cfg := GetConfig()
	return cfg.Client.Options
}

// GetClientValue 根据key获取客户端的展示值
func GetClientValue(key string) string {
	options := GetClientOptions()
	for _, opt := range options {
		if opt.Key == key {
			return opt.Value
		}
	}
	return ""
}