import os

import pytest

from haystack.nodes import PromptNode
from haystack.nodes.retriever.web import WebRetriever
from haystack.pipelines import ExtractiveQAPipeline, WebQAPipeline

from haystack.schema import Answer


@pytest.mark.integration
@pytest.mark.parametrize("retriever_with_docs", ["tfidf"], indirect=True)
def test_extractive_qa_answers(reader, retriever_with_docs, document_store_with_docs):
    pipeline = ExtractiveQAPipeline(reader=reader, retriever=retriever_with_docs)
    prediction = pipeline.run(query="Who lives in Berlin?", params={"Retriever": {"top_k": 10}, "Reader": {"top_k": 3}})
    assert prediction is not None
    assert type(prediction["answers"][0]) == Answer
    assert prediction["query"] == "Who lives in Berlin?"
    assert prediction["answers"][0].answer == "Carla"
    assert prediction["answers"][0].score <= 1
    assert prediction["answers"][0].score >= 0
    assert prediction["answers"][0].meta["meta_field"] == "test1"
    assert prediction["answers"][0].context == "My name is Carla and I live in Berlin"

    assert len(prediction["answers"]) == 3


@pytest.mark.integration
@pytest.mark.parametrize("retriever_with_docs", ["tfidf"], indirect=True)
def test_extractive_qa_answers_without_normalized_scores(reader_without_normalized_scores, retriever_with_docs):
    pipeline = ExtractiveQAPipeline(reader=reader_without_normalized_scores, retriever=retriever_with_docs)
    prediction = pipeline.run(query="Who lives in Berlin?", params={"Reader": {"top_k": 3}})
    assert prediction is not None
    assert prediction["query"] == "Who lives in Berlin?"
    assert prediction["answers"][0].answer == "Carla"
    assert prediction["answers"][0].score <= 9
    assert prediction["answers"][0].score >= 8
    assert prediction["answers"][0].meta["meta_field"] == "test1"
    assert prediction["answers"][0].context == "My name is Carla and I live in Berlin"

    assert len(prediction["answers"]) == 3


@pytest.mark.parametrize("retriever_with_docs", ["tfidf"], indirect=True)
def test_extractive_qa_offsets(reader, retriever_with_docs):
    pipeline = ExtractiveQAPipeline(reader=reader, retriever=retriever_with_docs)
    prediction = pipeline.run(query="Who lives in Berlin?", params={"Retriever": {"top_k": 5}})

    start = prediction["answers"][0].offsets_in_context[0].start
    end = prediction["answers"][0].offsets_in_context[0].end

    assert start == 11
    assert end == 16

    assert prediction["answers"][0].context[start:end] == prediction["answers"][0].answer


@pytest.mark.integration
@pytest.mark.parametrize("retriever_with_docs", ["tfidf"], indirect=True)
def test_extractive_qa_answers_single_result(reader, retriever_with_docs):
    pipeline = ExtractiveQAPipeline(reader=reader, retriever=retriever_with_docs)
    query = "testing finder"
    prediction = pipeline.run(query=query, params={"Retriever": {"top_k": 1}, "Reader": {"top_k": 1}})
    assert prediction is not None
    assert len(prediction["answers"]) == 1


@pytest.mark.integration
@pytest.mark.skipif(
    not os.environ.get("OPENAI_API_KEY", None),
    reason="Please export an env var called OPENAI_API_KEY containing the OpenAI API key to run this test.",
)
@pytest.mark.skipif(
    not os.environ.get("SERPERDEV_API_KEY", None),
    reason="Please export an env var called SERPERDEV_API_KEY containing the SerperDev key to run this test.",
)
def test_webqa_pipeline():
    search_key = os.environ.get("SERPERDEV_API_KEY")
    openai_key = os.environ.get("OPENAI_API_KEY")
    pn = PromptNode(
        "text-davinci-003",
        api_key=openai_key,
        max_length=256,
        default_prompt_template="question-answering-with-document-scores",
    )
    web_retriever = WebRetriever(api_key=search_key, top_search_results=2)
    pipeline = WebQAPipeline(retriever=web_retriever, prompt_node=pn)
    result = pipeline.run(query="Who is the father of Arya Stark?")
    assert isinstance(result, dict)
    assert len(result["results"]) == 1
    answer = result["results"][0]
    assert "stark" in answer.lower() or "ned" in answer.lower()