package config

func newAppConfig() *AppConfig {
	return &AppConfig{
		Version: getVersion(),
		Logging: &LogConfig{},
		HTTP:    &HTTPConfig{},
		OTEL:    &OTELConfig{},
	}
}

type AppConfig struct {
	Name        string `yaml:"name" env:"APP_NAME" envDefault:"go-http-server-with-otel"`
	Environment string `yaml:"environment" env:"APP_ENVIRONMENT" envDefault:"development"`
	// This should either be set by ldflags, such as with
	// go build -ldflags "-X gitea.libretechconsulting.com/rmcguire/go-http-server-with-otel/pkg/config.Version=$(VERSION)"
	// or allow this to use build meta. Will default to (devel)
	Version string      `yaml:"version" env:"APP_VERSION"`
	Logging *LogConfig  `yaml:"logging"`
	HTTP    *HTTPConfig `yaml:"http"`
	OTEL    *OTELConfig `yaml:"otel"`
}

// Logging Configuration
type LogConfig struct {
	Enabled    bool       `yaml:"enabled" env:"APP_LOG_ENABLED" envDefault:"true"`
	Level      string     `yaml:"level" env:"APP_LOG_LEVEL" envDefault:"info"`
	Format     LogFormat  `yaml:"format" env:"APP_LOG_FORMAT" envDefault:"json"`
	Output     LogOutput  `yaml:"output" env:"APP_LOG_OUTPUT" envDefault:"stderr"`
	TimeFormat TimeFormat `yaml:"timeFormat" env:"APP_LOG_TIME_FORMAT" envDefault:"short"`
}

type LogFormat string

const (
	LogFormatConsole LogFormat = "console"
	LogFormatJSON    LogFormat = "json"
)

type TimeFormat string

const (
	TimeFormatShort   TimeFormat = "short"
	TimeFormatLong    TimeFormat = "long"
	TimeFormatUnix    TimeFormat = "unix"
	TimeFormatRFC3339 TimeFormat = "rfc3339"
	TimeFormatOff     TimeFormat = "off"
)

type LogOutput string

const (
	LogOutputStdout LogOutput = "stdout"
	LogOutputStderr LogOutput = "stderr"
)

// HTTP Configuration
type HTTPConfig struct {
	Listen         string `yaml:"listen" env:"APP_HTTP_LISTEN" envDefault:"127.0.0.1:8080"`
	RequestTimeout int    `yaml:"requestTimeout" env:"APP_HTTP_REQUEST_TIMEOUT" envDefault:"30"`
}

// OTEL Configuration
type OTELConfig struct {
	Enabled            bool   `yaml:"enabled" env:"APP_OTEL_ENABLED" envDefault:"true"`
	PrometheusEnabled  bool   `yaml:"prometheusEnabled" env:"APP_OTEL_PROMETHEUS_ENABLED" envDefault:"true"`
	PrometheusPath     string `yaml:"prometheusPath" env:"APP_OTEL_PROMETHEUS_PATH" envDefault:"/metrics"`
	StdoutEnabled      bool   `yaml:"stdoutEnabled" env:"APP_OTEL_STDOUT_ENABLED" envDefault:"false"`
	MetricIntervalSecs int    `yaml:"metricIntervalSecs" env:"APP_OTEL_METRIC_INTERVAL_SECS" envDefault:"15"`
}