package logservice

import (
	"errors"
	"net"
	"os"
	"path/filepath"
	"testing"
	"time"

	"tera-clone/services/tera-api/internal/logstorage"
)

func TestClientServerRoundTripAndRetention(t *testing.T) {
	root := t.TempDir()
	now := time.Date(2026, 7, 29, 0, 0, 0, 0, time.UTC)
	store, err := logstorage.Open(logstorage.Options{
		Root: root, SegmentBytes: 1 << 20, Clock: func() time.Time { return now },
		FreeBytes: func(string) (int64, error) { return 1 << 40, nil },
	})
	if err != nil {
		t.Fatal(err)
	}
	socketPath := filepath.Join(t.TempDir(), "log.sock")
	listener, err := net.Listen("unix", socketPath)
	if err != nil {
		if errors.Is(err, os.ErrPermission) {
			t.Skipf("Unix sockets unavailable: %v", err)
		}
		t.Fatal(err)
	}
	defer listener.Close()
	done := make(chan error, 1)
	go func() { done <- (Server{Store: store}).Serve(listener) }()
	defer func() {
		_ = listener.Close()
		<-done
	}()

	client := NewClient(socketPath)
	for _, channel := range []string{"CH01", "CH02"} {
		if err := client.Append(logstorage.ClassPort, now, map[string]string{"channel": channel}); err != nil {
			t.Fatal(err)
		}
	}
	if _, err := client.call(command{Action: "clear_port", Class: logstorage.ClassAudit, Channel: "CH01"}); err == nil {
		t.Fatal("protected class deletion accepted")
	}
	if n, err := client.ClearPort("CH01"); err != nil || n != 1 {
		t.Fatalf("clear socket = %d, %v", n, err)
	}
	if revision, err := client.PortClearRevision(); err != nil || revision != 1 {
		t.Fatalf("clear revision = %d, %v", revision, err)
	}
	if rows, err := client.Read(logstorage.ClassPort); err != nil || len(rows) != 1 {
		t.Fatalf("clear survivors = %d, %v", len(rows), err)
	}
	sequence, err := client.AppendSequence(logstorage.ClassSystem, now.Add(-48*time.Hour), map[string]string{"message": "expired"})
	if err != nil {
		t.Fatalf("Append: %v", err)
	}
	if sequence != 1 {
		t.Fatalf("Append sequence = %d, want 1", sequence)
	}
	after, err := client.ReadAfter(logstorage.ClassSystem, sequence)
	if err != nil || len(after) != 0 {
		t.Fatalf("ReadAfter = %d, %v", len(after), err)
	}
	records, err := client.Read(logstorage.ClassSystem)
	if err != nil || len(records) != 1 {
		t.Fatalf("Read = %d, %v", len(records), err)
	}
	if err := client.ApplyRetention(logstorage.Retention{AuditDays: 365, SystemDays: 1, PortDays: 365}); err != nil {
		t.Fatalf("ApplyRetention: %v", err)
	}
	records, err = client.Read(logstorage.ClassSystem)
	if err != nil || len(records) != 0 {
		t.Fatalf("Read after retention = %d, %v", len(records), err)
	}
	snapshot, err := client.Snapshot()
	for _, class := range []string{logstorage.ClassAudit, logstorage.ClassPort, logstorage.ClassLink, ""} {
		if _, err := client.call(command{Action: "clear_system", Class: class}); err == nil {
			t.Fatalf("accepted protected class %s", class)
		}
	}
	if err := client.Append(logstorage.ClassSystem, now, map[string]string{"message": "delete"}); err != nil {
		t.Fatal(err)
	}
	if n, err := client.ClearSystem(); err != nil || n != 1 {
		t.Fatalf("system clear=%d,%v", n, err)
	}
	if revision, err := client.SystemClearRevision(); err != nil || revision != 1 {
		t.Fatalf("system revision=%d,%v", revision, err)
	}
	if rows, err := client.Read(logstorage.ClassPort); err != nil || len(rows) != 1 {
		t.Fatal("port log affected", err)
	}
	if err != nil || snapshot.Root != root || snapshot.GlobalFreeFloor != 0 {
		t.Fatalf("Snapshot = %+v, %v", snapshot, err)
	}
}

func TestClientReportsUnavailableSocket(t *testing.T) {
	client := NewClient(filepath.Join(t.TempDir(), "missing.sock"))
	if _, err := client.Read(logstorage.ClassAudit); !errors.Is(err, ErrUnavailable) {
		t.Fatalf("Read error = %v, want unavailable", err)
	}
}