package store

import (
	"testing"

	pb "git.ipng.ch/ipng/nginx-logtail/proto/logtailpb"
)

// --- ParseStatusExpr ---

func TestParseStatusExprEQ(t *testing.T) {
	n, op, ok := ParseStatusExpr("200")
	if !ok || n != 200 || op != pb.StatusOp_EQ {
		t.Fatalf("got (%d,%v,%v)", n, op, ok)
	}
}

func TestParseStatusExprExplicitEQ(t *testing.T) {
	for _, expr := range []string{"=200", "==200"} {
		n, op, ok := ParseStatusExpr(expr)
		if !ok || n != 200 || op != pb.StatusOp_EQ {
			t.Fatalf("expr %q: got (%d,%v,%v)", expr, n, op, ok)
		}
	}
}

func TestParseStatusExprNE(t *testing.T) {
	n, op, ok := ParseStatusExpr("!=200")
	if !ok || n != 200 || op != pb.StatusOp_NE {
		t.Fatalf("got (%d,%v,%v)", n, op, ok)
	}
}

func TestParseStatusExprGE(t *testing.T) {
	n, op, ok := ParseStatusExpr(">=400")
	if !ok || n != 400 || op != pb.StatusOp_GE {
		t.Fatalf("got (%d,%v,%v)", n, op, ok)
	}
}

func TestParseStatusExprGT(t *testing.T) {
	n, op, ok := ParseStatusExpr(">400")
	if !ok || n != 400 || op != pb.StatusOp_GT {
		t.Fatalf("got (%d,%v,%v)", n, op, ok)
	}
}

func TestParseStatusExprLE(t *testing.T) {
	n, op, ok := ParseStatusExpr("<=500")
	if !ok || n != 500 || op != pb.StatusOp_LE {
		t.Fatalf("got (%d,%v,%v)", n, op, ok)
	}
}

func TestParseStatusExprLT(t *testing.T) {
	n, op, ok := ParseStatusExpr("<500")
	if !ok || n != 500 || op != pb.StatusOp_LT {
		t.Fatalf("got (%d,%v,%v)", n, op, ok)
	}
}

func TestParseStatusExprEmpty(t *testing.T) {
	_, _, ok := ParseStatusExpr("")
	if ok {
		t.Fatal("expected ok=false for empty string")
	}
}

func TestParseStatusExprInvalid(t *testing.T) {
	for _, expr := range []string{"abc", "!=", ">=", "2xx"} {
		_, _, ok := ParseStatusExpr(expr)
		if ok {
			t.Fatalf("expr %q: expected ok=false", expr)
		}
	}
}

// --- MatchesFilter ---

func compiledEQ(status int32) *CompiledFilter {
	v := status
	return CompileFilter(&pb.Filter{HttpResponse: &v, StatusOp: pb.StatusOp_EQ})
}

func TestMatchesFilterNil(t *testing.T) {
	if !MatchesFilter(Tuple5{Website: "x"}, nil) {
		t.Fatal("nil filter should match everything")
	}
	if !MatchesFilter(Tuple5{Website: "x"}, &CompiledFilter{}) {
		t.Fatal("empty compiled filter should match everything")
	}
}

func TestMatchesFilterExactWebsite(t *testing.T) {
	w := "example.com"
	cf := CompileFilter(&pb.Filter{Website: &w})
	if !MatchesFilter(Tuple5{Website: "example.com"}, cf) {
		t.Fatal("expected match")
	}
	if MatchesFilter(Tuple5{Website: "other.com"}, cf) {
		t.Fatal("expected no match")
	}
}

func TestMatchesFilterWebsiteRegex(t *testing.T) {
	re := "gouda.*"
	cf := CompileFilter(&pb.Filter{WebsiteRegex: &re})
	if !MatchesFilter(Tuple5{Website: "gouda.example.com"}, cf) {
		t.Fatal("expected match")
	}
	if MatchesFilter(Tuple5{Website: "edam.example.com"}, cf) {
		t.Fatal("expected no match")
	}
}

func TestMatchesFilterURIRegex(t *testing.T) {
	re := "^/api/.*"
	cf := CompileFilter(&pb.Filter{UriRegex: &re})
	if !MatchesFilter(Tuple5{URI: "/api/users"}, cf) {
		t.Fatal("expected match")
	}
	if MatchesFilter(Tuple5{URI: "/health"}, cf) {
		t.Fatal("expected no match")
	}
}

func TestMatchesFilterInvalidRegexMatchesNothing(t *testing.T) {
	re := "[invalid"
	cf := CompileFilter(&pb.Filter{WebsiteRegex: &re})
	if MatchesFilter(Tuple5{Website: "anything"}, cf) {
		t.Fatal("invalid regex should match nothing")
	}
}

func TestMatchesFilterStatusEQ(t *testing.T) {
	cf := compiledEQ(200)
	if !MatchesFilter(Tuple5{Status: "200"}, cf) {
		t.Fatal("expected match")
	}
	if MatchesFilter(Tuple5{Status: "404"}, cf) {
		t.Fatal("expected no match")
	}
}

func TestMatchesFilterStatusNE(t *testing.T) {
	v := int32(200)
	cf := CompileFilter(&pb.Filter{HttpResponse: &v, StatusOp: pb.StatusOp_NE})
	if MatchesFilter(Tuple5{Status: "200"}, cf) {
		t.Fatal("expected no match for 200 != 200")
	}
	if !MatchesFilter(Tuple5{Status: "404"}, cf) {
		t.Fatal("expected match for 404 != 200")
	}
}

func TestMatchesFilterStatusGE(t *testing.T) {
	v := int32(400)
	cf := CompileFilter(&pb.Filter{HttpResponse: &v, StatusOp: pb.StatusOp_GE})
	if !MatchesFilter(Tuple5{Status: "400"}, cf) {
		t.Fatal("expected match: 400 >= 400")
	}
	if !MatchesFilter(Tuple5{Status: "500"}, cf) {
		t.Fatal("expected match: 500 >= 400")
	}
	if MatchesFilter(Tuple5{Status: "200"}, cf) {
		t.Fatal("expected no match: 200 >= 400")
	}
}

func TestMatchesFilterStatusLT(t *testing.T) {
	v := int32(400)
	cf := CompileFilter(&pb.Filter{HttpResponse: &v, StatusOp: pb.StatusOp_LT})
	if !MatchesFilter(Tuple5{Status: "200"}, cf) {
		t.Fatal("expected match: 200 < 400")
	}
	if MatchesFilter(Tuple5{Status: "400"}, cf) {
		t.Fatal("expected no match: 400 < 400")
	}
}

func TestMatchesFilterStatusNonNumeric(t *testing.T) {
	cf := compiledEQ(200)
	if MatchesFilter(Tuple5{Status: "ok"}, cf) {
		t.Fatal("non-numeric status should not match")
	}
}

func TestMatchesFilterCombined(t *testing.T) {
	w := "example.com"
	v := int32(200)
	cf := CompileFilter(&pb.Filter{
		Website:      &w,
		HttpResponse: &v,
		StatusOp:     pb.StatusOp_EQ,
	})
	if !MatchesFilter(Tuple5{Website: "example.com", Status: "200"}, cf) {
		t.Fatal("expected match")
	}
	if MatchesFilter(Tuple5{Website: "other.com", Status: "200"}, cf) {
		t.Fatal("expected no match: wrong website")
	}
	if MatchesFilter(Tuple5{Website: "example.com", Status: "404"}, cf) {
		t.Fatal("expected no match: wrong status")
	}
}

// --- IsTor label encoding and filtering ---

func TestEncodeLabelTupleRoundtripWithTor(t *testing.T) {
	for _, isTor := range []bool{false, true} {
		orig := Tuple5{Website: "a.com", Prefix: "1.2.3.0/24", URI: "/x", Status: "200", IsTor: isTor}
		got := LabelTuple(EncodeTuple(orig))
		if got != orig {
			t.Errorf("roundtrip mismatch: got %+v, want %+v", got, orig)
		}
	}
}

func TestLabelTupleBackwardCompat(t *testing.T) {
	// Old 4-field label (no is_tor field) should decode with IsTor=false.
	label := "a.com\x001.2.3.0/24\x00/x\x00200"
	got := LabelTuple(label)
	if got.IsTor {
		t.Errorf("expected IsTor=false for old label, got true")
	}
	if got.Website != "a.com" || got.Status != "200" {
		t.Errorf("unexpected tuple: %+v", got)
	}
}

func TestMatchesFilterTorYes(t *testing.T) {
	cf := CompileFilter(&pb.Filter{Tor: pb.TorFilter_TOR_YES})
	if !MatchesFilter(Tuple5{IsTor: true}, cf) {
		t.Fatal("TOR_YES should match TOR tuple")
	}
	if MatchesFilter(Tuple5{IsTor: false}, cf) {
		t.Fatal("TOR_YES should not match non-TOR tuple")
	}
}

func TestMatchesFilterTorNo(t *testing.T) {
	cf := CompileFilter(&pb.Filter{Tor: pb.TorFilter_TOR_NO})
	if !MatchesFilter(Tuple5{IsTor: false}, cf) {
		t.Fatal("TOR_NO should match non-TOR tuple")
	}
	if MatchesFilter(Tuple5{IsTor: true}, cf) {
		t.Fatal("TOR_NO should not match TOR tuple")
	}
}

func TestMatchesFilterTorAny(t *testing.T) {
	cf := CompileFilter(&pb.Filter{Tor: pb.TorFilter_TOR_ANY})
	if !MatchesFilter(Tuple5{IsTor: true}, cf) {
		t.Fatal("TOR_ANY should match TOR tuple")
	}
	if !MatchesFilter(Tuple5{IsTor: false}, cf) {
		t.Fatal("TOR_ANY should match non-TOR tuple")
	}
}