from types import SimpleNamespace

  from typing import Any, Dict

  
  import numpy as np
  
  from search.es_query_builder import ESQueryBuilder
  
  
  def _builder() -> ESQueryBuilder:
      return ESQueryBuilder(
          match_fields=["title.en^3.0", "brief.en^1.0"],

          multilingual_fields=["title", "brief"],
          core_multilingual_fields=["title", "brief"],
          shared_fields=[],

          text_embedding_field="title_embedding",

          image_embedding_field="image_embedding.vector",

          default_language="en",
      )
  
  

  def _recall_root(es_body: Dict[str, Any]) -> Dict[str, Any]:
      query_root = es_body["query"]
      if "bool" in query_root and query_root["bool"].get("must"):
          query_root = query_root["bool"]["must"][0]
      if "function_score" in query_root:
          query_root = query_root["function_score"]["query"]
      return query_root

  def _recall_should_clauses(es_body: Dict[str, Any]) -> list[Dict[str, Any]]:
      root = _recall_root(es_body)
      should = root.get("bool", {}).get("should")
      if should:
          return should
      return [root]
  
  

  def _recall_clause_name(clause: Dict[str, Any]) -> str | None:
      if "bool" in clause:
          return clause["bool"].get("_name")
      if "knn" in clause:
          return clause["knn"].get("_name")
      if "nested" in clause:
          return clause["nested"].get("_name")
      return None
  
  

  def test_knn_clause_moves_under_query_should_and_uses_outer_filters():

      qb = _builder()
      q = qb.build_query(
          query_text="bags",
          query_vector=np.array([0.1, 0.2, 0.3]),
          range_filters={"min_price": {"gte": 50, "lt": 100}},
          enable_knn=True,
      )
  

      assert "knn" not in q
      should = _recall_should_clauses(q)
      assert any(clause.get("knn", {}).get("_name") == "knn_query" for clause in should)
      assert q["query"]["bool"]["filter"] == [{"range": {"min_price": {"gte": 50, "lt": 100}}}]

  def test_knn_clause_uses_outer_query_filter_when_disjunctive_filters_present():

      qb = _builder()
      facets = [SimpleNamespace(field="category_name", disjunctive=True)]
      q = qb.build_query(
          query_text="bags",
          query_vector=np.array([0.1, 0.2, 0.3]),
          filters={"category_name": ["A", "B"], "vendor": "Nike"},
          range_filters={"min_price": {"gte": 50, "lt": 100}},
          facet_configs=facets,
          enable_knn=True,
      )
  

      assert "knn" not in q
      assert q["query"]["bool"]["filter"] == [
          {"term": {"vendor": "Nike"}},
          {"range": {"min_price": {"gte": 50, "lt": 100}}},
      ]

      assert q["post_filter"] == {"terms": {"category_name": ["A", "B"]}}
  
  

  def test_knn_clause_has_name_and_no_embedded_filter():

      qb = _builder()
      q = qb.build_query(
          query_text="bags",
          query_vector=np.array([0.1, 0.2, 0.3]),
          enable_knn=True,
      )
  

      should = _recall_should_clauses(q)
      knn_clause = next(clause["knn"] for clause in should if clause.get("knn", {}).get("_name") == "knn_query")
      assert "filter" not in knn_clause
      assert knn_clause["_name"] == "knn_query"

  def test_text_query_contains_only_base_and_translation_named_queries():

      qb = _builder()
      parsed_query = SimpleNamespace(

          rewritten_query="dress",

          detected_language="en",

          translations={"en": "dress", "zh": "连衣裙"},

      )
  

      q = qb.build_query(
          query_text="dress",
          parsed_query=parsed_query,
          enable_knn=False,

      )

      should = _recall_should_clauses(q)

      names = [clause["bool"]["_name"] for clause in should]

      assert names == ["base_query", "base_query_trans_zh"]

      base_should = should[0]["bool"]["should"]

      mm_types = [c["multi_match"]["type"] for c in base_should if "multi_match" in c]
      assert mm_types == ["best_fields", "phrase"]

  
  
  def test_text_query_skips_duplicate_translation_same_as_base():
      qb = _builder()
      parsed_query = SimpleNamespace(
          rewritten_query="dress",
          detected_language="en",
          translations={"en": "dress"},
      )
  
      q = qb.build_query(
          query_text="dress",
          parsed_query=parsed_query,
          enable_knn=False,

      )
  

      query_root = q["query"]
      if "function_score" in query_root:
          query_root = query_root["function_score"]["query"]
      base_bool = query_root["bool"]
      assert base_bool["_name"] == "base_query"

      mm_types = [c["multi_match"]["type"] for c in base_bool["should"] if "multi_match" in c]
      assert mm_types == ["best_fields", "phrase"]

  def test_product_title_exclusion_filter_is_applied_once_on_outer_query():

      qb = _builder()
      parsed_query = SimpleNamespace(
          rewritten_query="fitted dress",
          detected_language="en",
          translations={"zh": "修身 连衣裙"},
          product_title_exclusion_profile=SimpleNamespace(
              is_active=True,
              all_zh_title_exclusions=lambda: ["宽松"],
              all_en_title_exclusions=lambda: ["loose", "relaxed"],
          ),
      )
  
      q = qb.build_query(
          query_text="fitted dress",
          query_vector=np.array([0.1, 0.2, 0.3]),
          parsed_query=parsed_query,
          enable_knn=True,
      )
  
      expected_filter = {
          "bool": {
              "must_not": [
                  {
                      "bool": {
                          "should": [
                              {"match_phrase": {"title.zh": {"query": "宽松"}}},
                              {"match_phrase": {"title.en": {"query": "loose"}}},
                              {"match_phrase": {"title.en": {"query": "relaxed"}}},
                          ],
                          "minimum_should_match": 1,
                      }
                  }
              ]
          }
      }
  
      assert expected_filter in q["query"]["bool"]["filter"]

      should = _recall_should_clauses(q)
      knn_clause = next(clause["knn"] for clause in should if clause.get("knn", {}).get("_name") == "knn_query")
      assert "filter" not in knn_clause
  
  
  def test_image_knn_clause_is_added_alongside_base_translation_and_text_knn():
      qb = _builder()
      parsed_query = SimpleNamespace(
          rewritten_query="street tee",
          detected_language="en",
          translations={"zh": "街头短袖"},
      )
  
      q = qb.build_query(
          query_text="street tee",
          query_vector=np.array([0.1, 0.2, 0.3]),
          image_query_vector=np.array([0.4, 0.5, 0.6]),
          parsed_query=parsed_query,
          enable_knn=True,
      )
  
      should = _recall_should_clauses(q)
      names = [

          _recall_clause_name(clause)

          for clause in should
      ]
      assert names == ["base_query", "base_query_trans_zh", "knn_query", "image_knn_query"]

      image_knn = next(clause["nested"] for clause in should if clause.get("nested", {}).get("_name") == "image_knn_query")
      assert image_knn["path"] == "image_embedding"
      assert image_knn["score_mode"] == "max"
      assert image_knn["query"]["knn"]["field"] == "image_embedding.vector"

  
  
  def test_text_knn_plan_is_reused_for_ann_and_exact_rescore():
      qb = _builder()
      parsed_query = SimpleNamespace(query_tokens=["a", "b", "c", "d", "e"])
  
      ann_clause = qb.build_text_knn_clause(
          np.array([0.1, 0.2, 0.3]),
          parsed_query=parsed_query,
      )
      exact_clause = qb.build_exact_text_knn_rescore_clause(
          np.array([0.1, 0.2, 0.3]),
          parsed_query=parsed_query,
      )
  
      assert ann_clause is not None
      assert exact_clause is not None
      assert ann_clause["knn"]["k"] == qb.knn_text_k_long
      assert ann_clause["knn"]["num_candidates"] == qb.knn_text_num_candidates_long
      assert ann_clause["knn"]["boost"] == qb.knn_text_boost * 1.4
      assert exact_clause["script_score"]["script"]["params"]["boost"] == qb.knn_text_boost * 1.4
  
  
  def test_image_knn_plan_is_reused_for_ann_and_exact_rescore():
      qb = _builder()
  
      ann_clause = qb.build_image_knn_clause(np.array([0.4, 0.5, 0.6]))
      exact_clause = qb.build_exact_image_knn_rescore_clause(np.array([0.4, 0.5, 0.6]))
  
      assert ann_clause is not None
      assert exact_clause is not None
      assert ann_clause["nested"]["query"]["knn"]["boost"] == qb.knn_image_boost
      assert exact_clause["nested"]["query"]["script_score"]["script"]["params"]["boost"] == qb.knn_image_boost