package brainstore_test

import (
	"context"
	"os"
	"path/filepath"
	"testing"

	"github.com/mathiasbq/hyperguild/ingestion/internal/brainstore"
	"github.com/mathiasbq/hyperguild/ingestion/internal/capture"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestStoreWriteReturnsHandle(t *testing.T) {
	dir := t.TempDir()
	s := brainstore.New(dir)

	ref, err := s.Write(context.Background(), capture.Note{
		Content: "# X\n\nbody\n", Filename: "x", Wing: "a", Hall: "facts",
	})
	require.NoError(t, err)
	assert.Equal(t, "wiki/a/facts/x.md", ref.Path)
	assert.Equal(t, ref.Path, ref.ID)
	assert.NotEmpty(t, ref.ContentHash)
	assert.False(t, ref.Superseded)

	_, err = os.Stat(filepath.Join(dir, "wiki/a/facts/x.md"))
	require.NoError(t, err)
}

func TestStoreUpdateSupersedes(t *testing.T) {
	dir := t.TempDir()
	s := brainstore.New(dir)
	_, err := s.Write(context.Background(), capture.Note{
		Content: "old\n", Filename: "n", Wing: "a", Hall: "facts",
	})
	require.NoError(t, err)

	ref, err := s.Update(context.Background(), "n", capture.Note{
		Content: "new\n", Wing: "a", Hall: "facts", Reason: "changed",
	})
	require.NoError(t, err)
	assert.True(t, ref.Superseded)
	assert.Equal(t, "wiki/a/facts/n.md", ref.Path)

	got, _ := os.ReadFile(filepath.Join(dir, "wiki/a/facts/n.md"))
	assert.Contains(t, string(got), "new")
	assert.Contains(t, string(got), "supersede_reason: changed")
}

func TestStoreUpdateByFullPath(t *testing.T) {
	dir := t.TempDir()
	s := brainstore.New(dir)
	_, err := s.Write(context.Background(), capture.Note{Content: "old\n", Filename: "n", Wing: "a", Hall: "facts"})
	require.NoError(t, err)

	ref, err := s.Update(context.Background(), "wiki/a/facts/n.md", capture.Note{Content: "fresh\n"})
	require.NoError(t, err)
	assert.Equal(t, "wiki/a/facts/n.md", ref.Path)
}

func TestStoreUpdateMissingErrors(t *testing.T) {
	dir := t.TempDir()
	s := brainstore.New(dir)
	_, err := s.Update(context.Background(), "ghost", capture.Note{Content: "x\n", Wing: "a", Hall: "facts"})
	require.Error(t, err)
	_, statErr := os.Stat(filepath.Join(dir, "wiki/a/facts/ghost.md"))
	assert.True(t, os.IsNotExist(statErr), "update must not create")
}

func TestStoreGetRoundTripsHash(t *testing.T) {
	dir := t.TempDir()
	s := brainstore.New(dir)
	ref, err := s.Write(context.Background(), capture.Note{
		Content: "# Body\n\ntext\n", Filename: "n", Wing: "a", Hall: "facts",
	})
	require.NoError(t, err)

	note, err := s.Get(context.Background(), ref.ID)
	require.NoError(t, err)
	assert.Equal(t, ref.ContentHash, note.ContentHash, "write→get hash round-trips")
	assert.Equal(t, "a", note.Frontmatter["wing"])
	assert.Contains(t, note.Body, "# Body")
}