import uuid

import pytest

from app.ics_service import parse_ics_to_busy_blocks

SAMPLE_ICS = """BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Test//Test//EN
BEGIN:VEVENT
DTSTART:20260106T150000Z
DTEND:20260106T160000Z
SUMMARY:Meeting
UID:test-1
DTSTAMP:20260101T000000Z
END:VEVENT
BEGIN:VEVENT
DTSTART:20260107T140000Z
DTEND:20260107T153000Z
SUMMARY:Another Meeting
UID:test-2
DTSTAMP:20260101T000000Z
END:VEVENT
END:VCALENDAR"""


def test_parse_ics_extracts_busy_blocks():
    participant_id = str(uuid.uuid4())
    blocks = parse_ics_to_busy_blocks(SAMPLE_ICS, participant_id)

    assert len(blocks) == 2
    assert all(str(b.participant_id) == participant_id for b in blocks)


def test_parse_ics_extracts_correct_times():
    participant_id = str(uuid.uuid4())
    blocks = parse_ics_to_busy_blocks(SAMPLE_ICS, participant_id)

    sorted_blocks = sorted(blocks, key=lambda b: b.start_time)

    assert sorted_blocks[0].start_time.hour == 15
    assert sorted_blocks[0].end_time.hour == 16

    assert sorted_blocks[1].start_time.hour == 14
    assert sorted_blocks[1].end_time.hour == 15
    assert sorted_blocks[1].end_time.minute == 30


def test_parse_empty_ics():
    empty_ics = """BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Test//Test//EN
END:VCALENDAR"""

    participant_id = str(uuid.uuid4())
    blocks = parse_ics_to_busy_blocks(empty_ics, participant_id)

    assert len(blocks) == 0