package config

import "hyapp/pkg/configx"

// Config 描述 user-service 启动配置。
type Config struct {
	ServiceName      string              `yaml:"service_name"`
	NodeID           string              `yaml:"node_id"`
	GRPCAddr         string              `yaml:"grpc_addr"`
	MySQLDSN         string              `yaml:"mysql_dsn"`
	MySQLAutoMigrate bool                `yaml:"mysql_auto_migrate"`
	IDGenerator      IDGeneratorConfig   `yaml:"id_generator"`
	DisplayUserID    DisplayUserIDConfig `yaml:"display_user_id"`
	ThirdParty       ThirdPartyConfig    `yaml:"third_party"`
	JWT              JWTConfig           `yaml:"jwt"`
}

// IDGeneratorConfig 保存 user_id 发号节点配置。
type IDGeneratorConfig struct {
	NodeID int64 `yaml:"node_id"`
}

// DisplayUserIDConfig 保存短号分配和修改策略。
type DisplayUserIDConfig struct {
	AllocateMaxAttempts int   `yaml:"allocate_max_attempts"`
	ChangeCooldownSec   int64 `yaml:"change_cooldown_sec"`
}

// ThirdPartyConfig 保存三方登录 provider allowlist。
type ThirdPartyConfig struct {
	AllowedProviders []string `yaml:"allowed_providers"`
}

// JWTConfig 保存 access token 和 refresh token 的签发策略。
type JWTConfig struct {
	Issuer             string `yaml:"issuer"`
	AccessTokenTTLSec  int64  `yaml:"access_token_ttl_sec"`
	RefreshTokenTTLSec int64  `yaml:"refresh_token_ttl_sec"`
	SigningAlg         string `yaml:"signing_alg"`
	SigningSecret      string `yaml:"signing_secret"`
}

// Default 返回本地默认配置。
func Default() Config {
	return Config{
		ServiceName:      "user-service",
		NodeID:           "user-local",
		GRPCAddr:         ":13005",
		MySQLDSN:         "",
		MySQLAutoMigrate: false,
		IDGenerator: IDGeneratorConfig{
			NodeID: 1,
		},
		DisplayUserID: DisplayUserIDConfig{
			AllocateMaxAttempts: 8,
			ChangeCooldownSec:   2592000,
		},
		ThirdParty: ThirdPartyConfig{
			AllowedProviders: []string{"wechat"},
		},
		JWT: JWTConfig{
			Issuer:             "hyapp",
			AccessTokenTTLSec:  1800,
			RefreshTokenTTLSec: 2592000,
			SigningAlg:         "HS256",
			SigningSecret:      "dev-shared-secret",
		},
	}
}

// Load 从独立 config.yaml 读取 user-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
	}

	return cfg, nil
}