package config

import (
	"strings"

	"hyapp/pkg/configx"
	"hyapp/pkg/logx"
)

// Config 描述 activity-service 启动配置。
type Config struct {
	ServiceName string `yaml:"service_name"`
	NodeID      string `yaml:"node_id"`
	Environment string `yaml:"environment"`
	GRPCAddr    string `yaml:"grpc_addr"`
	// MySQLDSN 是活动状态、事件消费幂等和 outbox 的必需存储连接串。
	MySQLDSN string `yaml:"mysql_dsn"`
	// UserServiceAddr 是 fanout worker 读取目标用户游标的内部 gRPC 地址。
	UserServiceAddr string `yaml:"user_service_addr"`
	// WalletServiceAddr 是任务奖励入账依赖；activity 只发命令，不直接写余额。
	WalletServiceAddr string `yaml:"wallet_service_addr"`
	// TaskTimezone 是 daily 任务统一周期时区，不能使用客户端手机时区。
	TaskTimezone string `yaml:"task_timezone"`
	// MySQLAutoMigrate 保留给显式本地迁移；线上 schema 由发布流程或 initdb 管理。
	MySQLAutoMigrate bool               `yaml:"mysql_auto_migrate"`
	Consumer         ConsumerConfig     `yaml:"consumer"`
	MessageInbox     MessageInboxConfig `yaml:"message_inbox"`
	Log              logx.Config        `yaml:"log"`
}

// ConsumerConfig 保存 room outbox 消费底座配置。
type ConsumerConfig struct {
	RoomOutboxPollIntervalMs int64 `yaml:"room_outbox_poll_interval_ms"`
	BatchSize                int   `yaml:"batch_size"`
}

// MessageInboxConfig 保存 App system/activity inbox 的读取缓存参数；fanout 扫描由 cron-service 调度。
type MessageInboxConfig struct {
	UnreadCacheTTL string `yaml:"unread_cache_ttl"`
}

// Default 返回本地默认配置。
func Default() Config {
	return Config{
		ServiceName:       "activity-service",
		NodeID:            "activity-local",
		Environment:       "local",
		GRPCAddr:          ":13006",
		MySQLDSN:          "hyapp:hyapp@tcp(127.0.0.1:23306)/hyapp_activity?parseTime=true&charset=utf8mb4&loc=Local",
		UserServiceAddr:   "127.0.0.1:13005",
		WalletServiceAddr: "127.0.0.1:13004",
		TaskTimezone:      "Asia/Shanghai",
		MySQLAutoMigrate:  false,
		Consumer: ConsumerConfig{
			RoomOutboxPollIntervalMs: 1000,
			BatchSize:                100,
		},
		MessageInbox: MessageInboxConfig{
			UnreadCacheTTL: "60s",
		},
		Log: logx.Config{
			Level:           "info",
			Format:          "json",
			MaxPayloadBytes: 2048,
		},
	}
}

// Load 从独立 config.yaml 读取 activity-service 配置。
func Load(path string) (Config, error) {
	cfg := Default()
	if path == "" {
		return cfg, nil
	}

	if err := configx.LoadYAML(path, &cfg); err != nil {
		return Config{}, err
	}
	if strings.TrimSpace(cfg.UserServiceAddr) == "" {
		cfg.UserServiceAddr = Default().UserServiceAddr
	}
	if strings.TrimSpace(cfg.WalletServiceAddr) == "" {
		cfg.WalletServiceAddr = Default().WalletServiceAddr
	}
	if strings.TrimSpace(cfg.TaskTimezone) == "" {
		cfg.TaskTimezone = Default().TaskTimezone
	}
	cfg.ServiceName = strings.TrimSpace(cfg.ServiceName)
	if cfg.ServiceName == "" {
		cfg.ServiceName = "activity-service"
	}
	cfg.NodeID = strings.TrimSpace(cfg.NodeID)
	if cfg.NodeID == "" {
		cfg.NodeID = cfg.ServiceName
	}
	cfg.Environment = strings.ToLower(strings.TrimSpace(cfg.Environment))
	if cfg.Environment == "" {
		cfg.Environment = "local"
	}

	return cfg, nil
}