package registry

import (
    "os"
    "testing"

    yaml "gopkg.in/yaml.v2"

    "github.com/stretchr/testify/assert"

    "github.com/photoprism/photoprism/internal/config"
)

// TestFindByNameDeterministic verifies that FindByName returns the most
// recently updated node when multiple registry entries share the same Name.
func TestFindByNameDeterministic(t *testing.T) {
    // Isolate storage/config to avoid interference from other tests.
    tmp := t.TempDir()
    t.Setenv("PHOTOPRISM_STORAGE_PATH", tmp)

    conf := config.NewTestConfig("cluster-registry-findbyname")

    r, err := NewFileRegistry(conf)
    assert.NoError(t, err)

    // Two nodes with the same name but different UpdatedAt timestamps.
    old := Node{
        ID:        "id-old",
        Name:      "pp-node-01",
        Type:      "instance",
        CreatedAt: "2024-01-01T00:00:00Z",
        UpdatedAt: "2024-01-01T00:00:00Z",
    }
    newer := Node{
        ID:        "id-new",
        Name:      "pp-node-01",
        Type:      "instance",
        CreatedAt: "2024-02-01T00:00:00Z",
        UpdatedAt: "2024-02-01T00:00:00Z",
    }

    // Write YAML files directly to avoid timing flakiness.
    b1, err := yaml.Marshal(old)
    assert.NoError(t, err)
    assert.NoError(t, os.WriteFile(r.fileName(old.ID), b1, 0o600))

    b2, err := yaml.Marshal(newer)
    assert.NoError(t, err)
    assert.NoError(t, os.WriteFile(r.fileName(newer.ID), b2, 0o600))

    // Expect the most recently updated node (id-new).
    got, err := r.FindByName("pp-node-01")
    assert.NoError(t, err)
    if assert.NotNil(t, got) {
        assert.Equal(t, "id-new", got.ID)
        assert.Equal(t, "pp-node-01", got.Name)
    }

    // Non-existent name should return os.ErrNotExist.
    _, err = r.FindByName("does-not-exist")
    assert.ErrorIs(t, err, os.ErrNotExist)
}