package config

import (
	"path/filepath"
	"testing"
	"time"
)

func TestValidateRejectsNonLoopbackByDefault(t *testing.T) {
	t.Parallel()
	cfg := Config{
		HTTPAddress:       "0.0.0.0:8080",
		DatabaseDSN:       "file:test.db",
		MediaMTXURL:       "http://127.0.0.1:9997",
		ReconcileInterval: 1,
		ProbeInterval:     1,
	}
	if err := cfg.Validate(); err == nil {
		t.Fatal("expected non-loopback bind to be rejected")
	}
	cfg.AllowNonLoopback = true
	if err := cfg.Validate(); err != nil {
		t.Fatalf("explicit non-loopback opt-in failed: %v", err)
	}
}

func TestValidateReconcileLeaseAndOrphanProductionBoundary(t *testing.T) {
	base := Config{
		HTTPAddress: "127.0.0.1:8080", DatabaseDriver: "postgres",
		DatabaseDSN: "postgres://sense-runtime@127.0.0.1/yovision?sslmode=disable",
		MediaMTXURL: "http://127.0.0.1:9997", ReconcileInterval: time.Second,
		ProbeInterval: time.Second, ReconcileLeaseDuration: 30 * time.Second,
		ReconcileOperationTimeout: 20 * time.Second, OrphanScanEnabled: true,
		OrphanScanInterval: time.Minute, InstanceID: "ins_edge-01",
	}
	if err := base.Validate(); err != nil {
		t.Fatalf("valid multi-instance configuration failed: %v", err)
	}
	invalidTimeout := base
	invalidTimeout.ReconcileOperationTimeout = invalidTimeout.ReconcileLeaseDuration
	if err := invalidTimeout.Validate(); err == nil {
		t.Fatal("operation timeout equal to the lease was accepted")
	}
	invalidInstance := base
	invalidInstance.InstanceID = "tenant/site"
	if err := invalidInstance.Validate(); err == nil {
		t.Fatal("unbounded instance label was accepted")
	}
	sqlite := base
	sqlite.DatabaseDriver, sqlite.DatabaseDSN = "sqlite", "file:test.db"
	if err := sqlite.Validate(); err == nil {
		t.Fatal("orphan scanner was accepted on SQLite")
	}
}

func TestValidateRejectsCredentialsInMediaMTXURL(t *testing.T) {
	t.Parallel()
	cfg := Config{
		HTTPAddress:       "127.0.0.1:8080",
		DatabaseDSN:       "file:test.db",
		MediaMTXURL:       "http://" + "user" + ":" + "redacted" + "@127.0.0.1:9997",
		ReconcileInterval: 1,
		ProbeInterval:     1,
	}
	if err := cfg.Validate(); err == nil {
		t.Fatal("expected credentials in MediaMTX URL to be rejected")
	}
}

func TestValidateONVIFModeAndRewritePort(t *testing.T) {
	t.Parallel()
	cfg := Config{
		HTTPAddress:       "127.0.0.1:8080",
		DatabaseDSN:       "file:test.db",
		MediaMTXURL:       "http://127.0.0.1:9997",
		ReconcileInterval: 1,
		ProbeInterval:     1,
		ONVIFMode:         "standard",
		RTSPRewriteHost:   "127.0.0.1",
		RTSPRewritePort:   10554,
	}
	if err := cfg.Validate(); err != nil {
		t.Fatalf("valid ONVIF configuration failed: %v", err)
	}
	cfg.ONVIFMode = "vendor"
	if err := cfg.Validate(); err == nil {
		t.Fatal("unknown ONVIF mode must be rejected")
	}
	cfg.ONVIFMode = "standard"
	cfg.RTSPRewritePort = 65536
	if err := cfg.Validate(); err == nil {
		t.Fatal("invalid RTSP rewrite port must be rejected")
	}
}

func TestLoadRTSPStripQueryOptIn(t *testing.T) {
	t.Setenv("SENSE_ONVIF_RTSP_STRIP_QUERY", "true")
	cfg, err := Load()
	if err != nil {
		t.Fatal(err)
	}
	if !cfg.RTSPStripQuery {
		t.Fatal("explicit RTSP query stripping was not loaded")
	}
}

func TestValidateDatabaseDriver(t *testing.T) {
	t.Parallel()
	cfg := Config{
		HTTPAddress:       "127.0.0.1:8080",
		DatabaseDriver:    "postgres",
		DatabaseDSN:       "file:test.db",
		MediaMTXURL:       "http://127.0.0.1:9997",
		ReconcileInterval: 1,
		ProbeInterval:     1,
	}
	if err := cfg.Validate(); err == nil {
		t.Fatal("postgres driver must reject the SQLite default DSN")
	}
	cfg.DatabaseDSN = "postgres://sense-runtime@127.0.0.1/yovision?sslmode=disable"
	if err := cfg.Validate(); err != nil {
		t.Fatalf("valid PostgreSQL selection failed: %v", err)
	}
	cfg.DatabaseDriver = "mysql"
	if err := cfg.Validate(); err == nil {
		t.Fatal("unknown database driver must be rejected")
	}
}

func TestValidateControlAPIRequiresPostgresAndExternalSecurityFiles(t *testing.T) {
	cfg := Config{
		HTTPAddress: "127.0.0.1:8080", DatabaseDriver: "sqlite", DatabaseDSN: "file:test.db",
		MediaMTXURL: "http://127.0.0.1:9997", ReconcileInterval: 1, ProbeInterval: 1,
		ControlAPIEnabled: true, ControlAuthMode: "static-sha256",
		ControlAuthFile:      filepath.Join(t.TempDir(), "sense-auth.json"),
		ControlCursorKeyFile: filepath.Join(t.TempDir(), "sense-cursor.key"),
	}
	if err := cfg.Validate(); err == nil {
		t.Fatal("Control API was accepted on SQLite")
	}
	cfg.DatabaseDriver = "postgres"
	cfg.DatabaseDSN = "postgres://sense-runtime@127.0.0.1/yovision?sslmode=disable"
	if err := cfg.Validate(); err != nil {
		t.Fatalf("valid Control API configuration failed: %v", err)
	}
	cfg.ControlAuthFile = "relative-auth.json"
	if err := cfg.Validate(); err == nil {
		t.Fatal("repository-relative authentication file was accepted")
	}
}

func TestValidateControlAPINonLoopbackNeedsSeparateRiskAcceptance(t *testing.T) {
	cfg := Config{
		HTTPAddress: "0.0.0.0:8080", AllowNonLoopback: true,
		DatabaseDriver: "postgres", DatabaseDSN: "postgres://sense-runtime@127.0.0.1/yovision?sslmode=disable",
		MediaMTXURL: "http://127.0.0.1:9997", ReconcileInterval: 1, ProbeInterval: 1,
		ControlAPIEnabled: true, ControlAuthMode: "static-sha256",
		ControlAuthFile:      filepath.Join(t.TempDir(), "sense-auth.json"),
		ControlCursorKeyFile: filepath.Join(t.TempDir(), "sense-cursor.key"),
	}
	if err := cfg.Validate(); err == nil {
		t.Fatal("non-loopback plaintext Control API was accepted without explicit risk acceptance")
	}
	cfg.ControlAllowInsecureHTTP = true
	if err := cfg.Validate(); err != nil {
		t.Fatalf("explicit non-loopback Control API risk acceptance failed: %v", err)
	}
}

func TestValidateAuditRelaySecurityBoundary(t *testing.T) {
	base := Config{
		HTTPAddress: "127.0.0.1:8080", DatabaseDriver: "postgres",
		DatabaseDSN: "postgres://sense-runtime@127.0.0.1/yovision?sslmode=disable",
		MediaMTXURL: "http://127.0.0.1:9997", ReconcileInterval: time.Second, ProbeInterval: time.Second,
		AuditRelayEnabled: true, AuditRelayURL: "http://127.0.0.1:8081/internal/v1/audit-events:batch",
		AuditRelayKeyFile: filepath.Join(t.TempDir(), "relay-keys.json"), AuditRelayKeyID: "sense-a", AuditRelayInterval: time.Second,
	}
	if err := base.Validate(); err != nil {
		t.Fatalf("valid loopback relay rejected: %v", err)
	}
	remoteHTTP := base
	remoteHTTP.AuditRelayURL = "http://bell.example/internal/v1/audit-events:batch"
	if err := remoteHTTP.Validate(); err == nil {
		t.Fatal("remote plaintext relay was accepted")
	}
	sqlite := base
	sqlite.DatabaseDriver, sqlite.DatabaseDSN = "sqlite", "file:test.db"
	if err := sqlite.Validate(); err == nil {
		t.Fatal("SQLite audit relay was accepted")
	}
	relativeKey := base
	relativeKey.AuditRelayKeyFile = "relay-keys.json"
	if err := relativeKey.Validate(); err == nil {
		t.Fatal("repository-relative relay key was accepted")
	}
}