"""Tests for pattern detection."""

import pytest
import tempfile
import os
import sys
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from shell_memory.database import Database
from shell_memory.patterns import PatternDetector
from shell_memory.commands import CommandLibrary


@pytest.fixture
def db_with_commands():
    with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
        db_path = f.name
    db = Database(db_path)
    lib = CommandLibrary(db)
    for i in range(10):
        lib.add(f"command_{i}")
    yield db
    os.unlink(db_path)


class TestPatternDetector:
    def test_analyze_recent_commands_empty(self, db_with_commands):
        detector = PatternDetector(db_with_commands)
        patterns = detector.analyze_recent_commands(limit=10)
        assert isinstance(patterns, list)

    def test_analyze_recent_commands_with_data(self, db_with_commands):
        detector = PatternDetector(db_with_commands)
        patterns = detector.analyze_recent_commands(limit=50)
        assert isinstance(patterns, list)

    def test_get_detected_patterns(self, db_with_commands):
        detector = PatternDetector(db_with_commands)
        patterns = detector.get_detected_patterns()
        assert isinstance(patterns, list)

    def test_suggest_shortcuts(self, db_with_commands):
        detector = PatternDetector(db_with_commands)
        shortcuts = detector.suggest_shortcuts()
        assert isinstance(shortcuts, list)

    def test_get_workflow_stats(self, db_with_commands):
        detector = PatternDetector(db_with_commands)
        stats = detector.get_workflow_stats(days=7)
        assert "total_commands" in stats
        assert "patterns_found" in stats


class TestPatternNgramDetection:
    def test_ngram_patterns_creation(self, db_with_commands):
        detector = PatternDetector(db_with_commands)
        detector.min_frequency = 2
        detector.window_size = 3
        commands = db_with_commands.get_all_commands()
        command_ids = [cmd.id for cmd in commands if cmd.id is not None]
        if len(command_ids) >= 3:
            result = detector._find_ngram_patterns(command_ids)
            assert isinstance(result, list)