"""Tests for pattern detection module."""

import pytest
from cmdparse.patterns import detect_pattern_type


class TestDetectPatternType:
    def test_empty_input_returns_empty(self):
        assert detect_pattern_type('') == 'empty'
        assert detect_pattern_type('   ') == 'empty'
        assert detect_pattern_type('\n\n') == 'empty'

    def test_table_detection(self):
        table_input = """NAME    IMAGE    STATUS
 nginx   nginx:1   running
 redis   redis:3   stopped"""
        result = detect_pattern_type(table_input)
        assert result in ['table', 'key_value_block']

    def test_key_value_colon_detection(self):
        kv_input = """name: John
 age: 30
 city: NYC"""
        result = detect_pattern_type(kv_input)
        assert result == 'key_value_colon'

    def test_key_value_equals_detection(self):
        kv_input = """name=John
 age=30
 city=NYC"""
        result = detect_pattern_type(kv_input)
        assert result == 'key_value_equals'

    def test_delimited_comma_detection(self):
        csv_input = """name,age,city
 John,30,NYC
 Jane,25,LA"""
        result = detect_pattern_type(csv_input)
        assert result == 'delimited_comma'

    def test_delimited_tab_detection(self):
        tsv_input = """name\tage\tcity
 John\t30\tNYC"""
        result = detect_pattern_type(tsv_input)
        assert result == 'delimited_tab'

    def test_raw_text_detection(self):
        raw_input = """This is just some random text
 Without any particular structure"""
        result = detect_pattern_type(raw_input)
        assert result in ['raw', 'table', 'key_value_block']