// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
// SPDX-License-Identifier: PolyForm-Noncommercial-1.0.0

package tokens

import (
	"errors"
	"os"
	"path/filepath"
	"strings"
	"testing"
)

func TestCreateAndAuthenticate(t *testing.T) {
	path := filepath.Join(t.TempDir(), "tokens.toml")
	s := New(path)
	record, raw, err := s.Create("ci", nil)
	if err != nil {
		t.Fatalf("Create: %v", err)
	}
	if record == nil || raw == "" {
		t.Fatal("Create failed")
	}
	if !strings.HasPrefix(raw, TokenPrefix) {
		t.Fatalf("raw = %q", raw)
	}
	if record.TokenHash == raw {
		t.Fatal("raw token persisted")
	}
	found := s.Authenticate(raw)
	if found == nil || found.Name != "ci" {
		t.Fatalf("Authenticate = %v", found)
	}
	if !found.HasScope("write") {
		t.Fatal("unrestricted token should grant every scope")
	}
	if s.Authenticate("vol_wrong") != nil {
		t.Fatal("wrong token authenticated")
	}
	if s.Authenticate("not-our-prefix") != nil {
		t.Fatal("foreign prefix authenticated")
	}

	info, err := os.Stat(path)
	if err != nil {
		t.Fatalf("stat: %v", err)
	}
	if info.Mode().Perm() != 0o600 {
		t.Fatalf("mode = %v", info.Mode().Perm())
	}

	rawFile, err := os.ReadFile(path)
	if err != nil {
		t.Fatalf("read: %v", err)
	}
	if strings.Contains(string(rawFile), raw) {
		t.Fatal("raw token leaked into the file")
	}
}

func TestCreateScopes(t *testing.T) {
	s := New(filepath.Join(t.TempDir(), "tokens.toml"))
	record, _, err := s.Create("scoped", []string{"write", "bogus", "delete"})
	if err != nil {
		t.Fatalf("Create: %v", err)
	}
	if record == nil {
		t.Fatal("Create failed")
	}
	if len(record.Scopes) != 2 || record.Scopes[0] != "write" || record.Scopes[1] != "delete" {
		t.Fatalf("scopes = %v", record.Scopes)
	}
	if record.HasScope("read") {
		t.Fatal("read scope granted")
	}
	if !record.HasScope("write") {
		t.Fatal("write scope missing")
	}

	// An explicit list that names no valid scope must be refused, not
	// turned into an unrestricted token.
	if _, _, err := s.Create("invalid-only", []string{"bogus"}); !errors.Is(err, ErrNoValidScope) {
		t.Fatalf("err = %v, want ErrNoValidScope", err)
	}
}

func TestCreateRejectsDuplicatesAndEmpty(t *testing.T) {
	s := New(filepath.Join(t.TempDir(), "tokens.toml"))
	if record, _, err := s.Create("dup", nil); err != nil || record == nil {
		t.Fatalf("first Create: %v, %v", record, err)
	}
	if record, _, err := s.Create("dup", nil); err == nil || record != nil {
		t.Fatal("duplicate name accepted")
	}
	if record, _, err := s.Create("   ", nil); err == nil || record != nil {
		t.Fatal("empty name accepted")
	}
}

func TestPersistedAcrossReopen(t *testing.T) {
	path := filepath.Join(t.TempDir(), "tokens.toml")
	s := New(path)
	_, raw, err := s.Create("ci", []string{"write"})
	if err != nil {
		t.Fatalf("Create: %v", err)
	}
	reopened := New(path)
	if len(reopened.All()) != 1 {
		t.Fatalf("tokens = %v", reopened.All())
	}
	if reopened.Authenticate(raw) == nil {
		t.Fatal("token lost across reopen")
	}
}

func TestTouchRefreshesOncePerDay(t *testing.T) {
	s := New(filepath.Join(t.TempDir(), "tokens.toml"))
	record, _, err := s.Create("ci", nil)
	if err != nil {
		t.Fatalf("Create: %v", err)
	}
	s.Touch("ci")
	after := s.All()[0]
	if after.LastUsed == "" {
		t.Fatal("last_used not set")
	}
	s.Touch("ci")
	again := s.All()[0]
	if again.LastUsed != after.LastUsed {
		t.Fatal("last_used updated twice in one day")
	}
	s.Touch("missing")
	if record.Created == "" {
		t.Fatal("created missing")
	}
}

func TestRevoke(t *testing.T) {
	s := New(filepath.Join(t.TempDir(), "tokens.toml"))
	s.Create("one", nil)
	if !s.Revoke("one") {
		t.Fatal("Revoke failed")
	}
	if s.Revoke("one") {
		t.Fatal("Revoke succeeded twice")
	}
	if len(s.All()) != 0 {
		t.Fatalf("tokens = %v", s.All())
	}
}

func TestUnreadableFileYieldsNoTokens(t *testing.T) {
	path := filepath.Join(t.TempDir(), "tokens.toml")
	if err := os.WriteFile(path, []byte("broken = = ="), 0o600); err != nil {
		t.Fatalf("write: %v", err)
	}
	if got := New(path).All(); got != nil {
		t.Fatalf("tokens = %v, want none", got)
	}
}

func TestMissingFileYieldsNoTokens(t *testing.T) {
	if got := New(filepath.Join(t.TempDir(), "nope.toml")).All(); got != nil {
		t.Fatalf("tokens = %v, want none", got)
	}
}