package history

import (
	"path/filepath"
	"testing"
)

func TestAppendAndList(t *testing.T) {
	path := filepath.Join(t.TempDir(), "history.json")
	s := New(path, 10)

	s.Append(Entry{Text: "first", Origin: "a", Ts: 1})
	s.Append(Entry{Text: "second", Origin: "b", Ts: 2})

	got := s.List()
	if len(got) != 2 {
		t.Fatalf("len = %d, want 2", len(got))
	}
	if got[0].Text != "first" || got[1].Text != "second" {
		t.Errorf("order wrong: %+v", got)
	}
}

func TestAppendSkipsDuplicate(t *testing.T) {
	path := filepath.Join(t.TempDir(), "history.json")
	s := New(path, 10)

	s.Append(Entry{Text: "dup", Origin: "a", Ts: 1})
	s.Append(Entry{Text: "dup", Origin: "a", Ts: 2})

	if len(s.List()) != 1 {
		t.Errorf("len = %d, want 1 (duplicate skipped)", len(s.List()))
	}
}

func TestTrimToMax(t *testing.T) {
	path := filepath.Join(t.TempDir(), "history.json")
	s := New(path, 3)

	for i := 0; i < 10; i++ {
		s.Append(Entry{Text: string(rune('a' + i)), Origin: "a", Ts: int64(i)})
	}

	got := s.List()
	if len(got) != 3 {
		t.Fatalf("len = %d, want 3", len(got))
	}
	if got[0].Text != "h" {
		t.Errorf("oldest kept = %q, want \"h\"", got[0].Text)
	}
}

func TestPersistence(t *testing.T) {
	path := filepath.Join(t.TempDir(), "history.json")
	s := New(path, 10)
	s.Append(Entry{Text: "persisted", Origin: "a", Ts: 42})

	// A new store reading the same path should reload the entry.
	s2 := New(path, 10)
	got := s2.List()
	if len(got) != 1 || got[0].Text != "persisted" {
		t.Errorf("reloaded = %+v, want persisted entry", got)
	}
}

func TestDefaultPath(t *testing.T) {
	p, err := DefaultPath()
	if err != nil {
		t.Fatalf("DefaultPath: %v", err)
	}
	if p == "" {
		t.Error("DefaultPath returned empty string")
	}
}