import os
import tempfile

import pytest

from snip.db import Database
from snip.search import SearchEngine


@pytest.fixture
def search_engine():
    with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
        db_path = f.name
    db = Database(db_path)
    db.init_schema()
    engine = SearchEngine(db_path)
    db.create_snippet(
        title="Python Hello World",
        code="print('hello')",
        description="A simple Python greeting",
        language="python",
        tags=["python", "hello", "beginner"],
    )
    db.create_snippet(
        title="JavaScript Hello",
        code="console.log('hello')",
        description="JavaScript greeting",
        language="javascript",
        tags=["javascript", "hello"],
    )
    db.create_snippet(
        title="Python List Comprehension",
        code="[x**2 for x in range(10)]",
        description="Python list comprehension example",
        language="python",
        tags=["python", "advanced"],
    )
    yield engine
    db.close()
    os.unlink(db_path)


def test_basic_search(search_engine):
    results = search_engine.search("hello")
    assert len(results) == 2


def test_search_with_language_filter(search_engine):
    results = search_engine.search("hello", language="python")
    assert len(results) == 1
    assert results[0]["language"] == "python"


def test_search_with_tag_filter(search_engine):
    results = search_engine.search("*", tag="python")
    assert len(results) == 2


def test_search_no_query_returns_all(search_engine):
    results = search_engine.search("")
    assert len(results) == 3


def test_highlight_matches(search_engine):
    text = "This is a hello world example"
    highlighted = search_engine.highlight_matches(text, "hello world")
    assert "**" in highlighted


def test_parse_query(search_engine):
    parsed = search_engine.parse_query("hello AND world")
    assert len(parsed["terms"]) >= 1
    assert parsed["raw"] == "hello AND world"


def test_suggest_completions(search_engine):
    suggestions = search_engine.suggest_completions("pyt")
    assert "python" in suggestions


def test_empty_query_with_filters(search_engine):
    results = search_engine.search("", language="javascript")
    assert len(results) == 1
    assert results[0]["language"] == "javascript"