"""Log parser tests (Chapter 12: highest testing priority per Ch12)."""
from __future__ import annotations

from app.services.log_parser.apache import combined_parser, common_parser
from app.services.log_parser.format_compiler import compile_format, parse_apache_timestamp

COMMON_LINE = '127.0.0.1 - - [10/Oct/2026:13:55:36 -0700] "GET /index.html HTTP/1.1" 200 1234\n'
COMBINED_LINE = (
    '127.0.0.1 - - [10/Oct/2026:13:55:36 -0700] "GET /index.html HTTP/1.1" 200 1234 '
    '"https://example.com/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) Chrome/120.0"\n'
)
MALFORMED_LINE = "this is not a log line\n"


def test_common_parser_parses_valid_line():
    entry = common_parser().parse_line(COMMON_LINE)
    assert entry is not None
    assert entry.ip == "127.0.0.1"
    assert entry.method == "GET"
    assert entry.path == "/index.html"
    assert entry.status_code == 200
    assert entry.bytes_sent == 1234
    assert entry.referrer is None
    assert entry.user_agent is None


def test_combined_parser_parses_referrer_and_user_agent():
    entry = combined_parser().parse_line(COMBINED_LINE)
    assert entry is not None
    assert entry.referrer == "https://example.com/"
    assert "Chrome" in entry.user_agent


def test_malformed_line_returns_none_not_raises():
    assert common_parser().parse_line(MALFORMED_LINE) is None


def test_custom_format_string_compiles_and_parses():
    custom_format = '%h %t "%r" %>s'
    compiled = compile_format(custom_format)
    match = compiled.pattern.match('127.0.0.1 [10/Oct/2026:13:55:36 -0700] "GET /x HTTP/1.1" 404')
    assert match is not None
    assert match.group("ip") == "127.0.0.1"
    assert match.group("status") == "404"


def test_parse_apache_timestamp_normalizes_to_utc():
    dt = parse_apache_timestamp("10/Oct/2026:13:55:36 -0700")
    assert dt.hour == 20  # -0700 -> UTC
    assert dt.tzinfo is None