package ect

import (
	"os"
	"testing"
	"time"
)

func TestDefaultConfig(t *testing.T) {
	c := DefaultConfig()
	if c.IATMaxAge != 15*time.Minute {
		t.Errorf("IATMaxAge: got %v", c.IATMaxAge)
	}
	if c.JTIReplaySize != 0 {
		t.Errorf("JTIReplaySize: got %d", c.JTIReplaySize)
	}
}

func TestLoadConfigFromEnv(t *testing.T) {
	os.Setenv(EnvIATMaxAgeMinutes, "20")
	os.Setenv(EnvJTIReplayCacheSize, "1000")
	os.Setenv(EnvIATMaxFutureSec, "45")
	os.Setenv(EnvDefaultExpiryMin, "12")
	os.Setenv(EnvJTIReplayTTLMin, "90")
	defer func() {
		os.Unsetenv(EnvIATMaxAgeMinutes)
		os.Unsetenv(EnvJTIReplayCacheSize)
		os.Unsetenv(EnvIATMaxFutureSec)
		os.Unsetenv(EnvDefaultExpiryMin)
		os.Unsetenv(EnvJTIReplayTTLMin)
	}()
	c := LoadConfigFromEnv()
	if c.IATMaxAge != 20*time.Minute {
		t.Errorf("IATMaxAge from env: got %v", c.IATMaxAge)
	}
	if c.JTIReplaySize != 1000 {
		t.Errorf("JTIReplaySize from env: got %d", c.JTIReplaySize)
	}
	if c.IATMaxFuture != 45*time.Second {
		t.Errorf("IATMaxFuture: got %v", c.IATMaxFuture)
	}
	if c.DefaultExpiry != 12*time.Minute {
		t.Errorf("DefaultExpiry: got %v", c.DefaultExpiry)
	}
	if c.JTIReplayTTL != 90*time.Minute {
		t.Errorf("JTIReplayTTL: got %v", c.JTIReplayTTL)
	}
}

func TestLoadConfigFromEnv_invalidInt(t *testing.T) {
	os.Setenv(EnvIATMaxAgeMinutes, "bad")
	defer os.Unsetenv(EnvIATMaxAgeMinutes)
	c := LoadConfigFromEnv()
	if c.IATMaxAge != 15*time.Minute {
		t.Errorf("invalid int should keep default: got %v", c.IATMaxAge)
	}
}

func TestConfig_CreateOptions(t *testing.T) {
	c := DefaultConfig()
	opts := c.CreateOptions("my-kid")
	if opts.KeyID != "my-kid" {
		t.Errorf("KeyID: got %q", opts.KeyID)
	}
	if opts.DefaultExpiry != c.DefaultExpiry {
		t.Errorf("DefaultExpiry: got %v", opts.DefaultExpiry)
	}
}

func TestConfig_VerifyOptions(t *testing.T) {
	c := DefaultConfig()
	opts := c.VerifyOptions()
	if opts.IATMaxAge != c.IATMaxAge {
		t.Errorf("IATMaxAge: got %v", opts.IATMaxAge)
	}
	if opts.DAG.ClockSkewTolerance != DefaultClockSkewTolerance {
		t.Errorf("DAG.ClockSkewTolerance: got %d", opts.DAG.ClockSkewTolerance)
	}
}