package env

import (
	"time"

	"github.com/opencost/opencost/core/pkg/env"
	"github.com/opencost/opencost/core/pkg/log"
	"github.com/opencost/opencost/core/pkg/util/timeutil"
)

// Environment variables specific to the running of opencost
const (
	DefaultAPIPort           = 9003
	defaultOpencostNamespace = "opencost"
)

const (
	UTCOffsetEnvVar              = "UTC_OFFSET"
	MCPQueryTimeoutSecondsEnvVar = "MCP_QUERY_TIMEOUT_SECONDS"
)

func GetOpencostAPIPort() int {
	return env.GetAPIPortWithDefault(DefaultAPIPort)
}

// GetOpencostNamespace returns the environment variable value that is set for the kubernetes namespace
// this service is installed in.
func GetOpencostNamespace() string {
	return env.GetInstallNamespace(defaultOpencostNamespace)
}

// GetUTCOffset returns the environment variable value for UTCOffset
func GetUTCOffset() string {
	return env.Get(UTCOffsetEnvVar, "")
}

// GetParsedUTCOffset returns the duration of the configured UTC offset
func GetParsedUTCOffset() time.Duration {
	offset, err := timeutil.ParseUTCOffset(GetUTCOffset())
	if err != nil {
		log.Warnf("Failed to parse UTC offset: %s", err)
		return time.Duration(0)
	}
	return offset
}

// GetMCPQueryTimeout returns the configured timeout for MCP query operations.
// Default is 60 seconds, but can be configured via MCP_QUERY_TIMEOUT_SECONDS environment variable.
// Minimum timeout is 1 second to prevent immediate timeouts.
func GetMCPQueryTimeout() time.Duration {
	seconds := env.GetInt(MCPQueryTimeoutSecondsEnvVar, 60)
	if seconds <= 0 {
		seconds = 1
	}
	return time.Duration(seconds) * time.Second
}