package models

import (
	"strings"
	"testing"
)

func TestCacheEntryValidate(t *testing.T) {
	valid := CacheEntry{Key: "go-mod-v1", Hash: []string{"go.sum", "sub/dir/package-lock.json"}, Paths: []string{"/workspace/go/pkg/mod", "/root/.cache"}}
	if err := valid.Validate(); err != nil {
		t.Fatalf("valid entry: %v", err)
	}

	cases := []struct {
		name  string
		entry CacheEntry
		want  string
	}{
		{"empty key", CacheEntry{Key: "", Paths: []string{"/x"}}, "invalid key"},
		{"key with slash", CacheEntry{Key: "a/b", Paths: []string{"/x"}}, "invalid key"},
		{"no paths", CacheEntry{Key: "ok"}, "no paths"},
		{"empty path", CacheEntry{Key: "ok", Paths: []string{""}}, "empty path"},
		{"path with space", CacheEntry{Key: "ok", Paths: []string{"/my dir"}}, "unsupported characters"},
		{"path with quote", CacheEntry{Key: "ok", Paths: []string{"/x'$(rm)"}}, "unsupported characters"},
		{"path traversal", CacheEntry{Key: "ok", Paths: []string{"/x/../y"}}, ".."},
		{"duplicate path", CacheEntry{Key: "ok", Paths: []string{"/x", "/x"}}, "duplicate"},
		{"level too high", CacheEntry{Key: "ok", Paths: []string{"/x"}, CompressionLevel: 20}, "out of range"},
		{"negative level", CacheEntry{Key: "ok", Paths: []string{"/x"}, CompressionLevel: -1}, "out of range"},
		{"bad when", CacheEntry{Key: "ok", Paths: []string{"/x"}, When: "sometimes"}, "not one of"},
		{"absolute hash path", CacheEntry{Key: "ok", Hash: []string{"/go.sum"}, Paths: []string{"/x"}}, "not repo-relative"},
		{"empty hash path", CacheEntry{Key: "ok", Hash: []string{""}, Paths: []string{"/x"}}, "not repo-relative"},
		{"hash path traversal", CacheEntry{Key: "ok", Hash: []string{"../secret"}, Paths: []string{"/x"}}, "not repo-relative"},
		{"hash path inner traversal", CacheEntry{Key: "ok", Hash: []string{"a/../../b"}, Paths: []string{"/x"}}, "unsupported characters"},
		{"hash path with colon", CacheEntry{Key: "ok", Hash: []string{"rev:go.sum"}, Paths: []string{"/x"}}, "unsupported characters"},
		{"hash path with space", CacheEntry{Key: "ok", Hash: []string{"my lock"}, Paths: []string{"/x"}}, "unsupported characters"},
		{"hash path with glob", CacheEntry{Key: "ok", Hash: []string{"*.sum"}, Paths: []string{"/x"}}, "unsupported characters"},
	}
	for _, tc := range cases {
		err := tc.entry.Validate()
		if err == nil || !strings.Contains(err.Error(), tc.want) {
			t.Errorf("%s: got %v, want error containing %q", tc.name, err, tc.want)
		}
	}

	ok := CacheEntry{Key: "go-mod", Hash: []string{"go.sum"}, Paths: []string{"node_modules", "/root/.cache"}, CompressionLevel: 19, When: "always"}
	if err := ok.Validate(); err != nil {
		t.Errorf("relative and absolute paths should validate, got %v", err)
	}
}
