// Copyright 2026 The InfiniFlow Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package infinity

import (
	"reflect"
	"testing"
)

// TestTransformChunkFields_IngestionShape is the T0 unit-tier read-back
// baseline for the Infinity engine (issue #17371). Unlike Elasticsearch, which
// stores the suffixed field names verbatim, Infinity reverse-maps the
// ingestion-emitted names to its own base names inside transformChunkFields.
// This test calls that transform directly (the engine requires a live Infinity
// instance, so it cannot be exercised via httptest) and asserts the mapping
// stays stable. It guards T2: when the suffixing is moved out of ingestion into
// the engine write boundary, transformChunkFields must keep producing the same
// base-name document.
//
// The input mirrors the shape produced by indexdoc.ProcessChunksForPipeline
// after T1 (kb_id is a plain string).
func TestTransformChunkFields_IngestionShape(t *testing.T) {
	chunk := map[string]interface{}{
		"doc_id":               "doc-1",
		"id":                   "chunk-1",
		"kb_id":                "kb-1",
		"docnm_kwd":            "sample.md",
		"content_with_weight":  "hello world",
		"create_timestamp_flt": float64(123.0),
		"question_kwd":         []interface{}{"q1", "q2"},
		"important_kwd":        []interface{}{"k1"},
		"page_num_int":         int(1),
		"position_int":         int(2),
	}

	got := transformChunkFields(chunk, nil)

	want := map[string]interface{}{
		"doc_id":               "doc-1",
		"id":                   "chunk-1",
		"kb_id":                "kb-1",
		"docnm":                "sample.md",
		"content":              "hello world",
		"create_timestamp_flt": float64(123.0),
		"questions":            "q1\nq2",
		"important_keywords":   "k1",
		"page_num_int":         int(1),
		"position_int":         int(2),
	}

	for k, wv := range want {
		gv, ok := got[k]
		if !ok {
			t.Errorf("transformed doc missing field %q", k)
			continue
		}
		if !reflect.DeepEqual(gv, wv) {
			t.Errorf("field %q = %#v, want %#v", k, gv, wv)
		}
	}

	// The suffixed ingestion-only names must not leak into the transformed doc.
	for _, leaked := range []string{"docnm_kwd", "content_with_weight", "question_kwd", "important_kwd"} {
		if _, ok := got[leaked]; ok {
			t.Errorf("transform leaked ingestion-only field %q into Infinity doc", leaked)
		}
	}
}