"""Shared fixtures: a fake Radicale data tree on disk + pre-imported server module."""

import json
import os
import sys
import textwrap
from pathlib import Path

import pytest

REPO_ROOT = Path(__file__).resolve().parent.parent
sys.path.insert(0, str(REPO_ROOT / "src"))


def _write(path: Path, content: str) -> Path:
    path.parent.mkdir(parents=True, exist_ok=True)
    path.write_text(content, encoding="utf-8")
    return path


def _cal_props(displayname: str = "", description: str = "") -> str:
    props = {"tag": "VCALENDAR"}
    if displayname:
        props["D:displayname"] = displayname
    if description:
        props["C:calendar-description"] = description
    return json.dumps(props)


ICS_HEADER = "BEGIN:VCALENDAR\nVERSION:2.0\nPRODID:-//mcp-ics-test//EN\n"
ICS_FOOTER = "END:VCALENDAR\n"


def _ics(body: str) -> str:
    return ICS_HEADER + body + ICS_FOOTER


@pytest.fixture(scope="module")
def radicale_tree(tmp_path_factory) -> Path:
    """A minimal Radicale collection-root layout covering edge cases."""
    root = tmp_path_factory.mktemp("radicale")
    cr = root / "collections" / "collection-root"

    # user 'manuel', regular calendar
    cal = cr / "manuel" / "perso"
    _write(cal / ".Radicale.props", _cal_props("Perso manuel", "Agenda perso"))
    _write(
        cal / "abc.ics",
        ICS_HEADER
        + (
            "BEGIN:VEVENT\n"
            "UID:evt-1@test\n"
            "DTSTAMP:20260101T000000Z\n"
            "DTSTART:20260315T090000\n"
            "DTEND:20260315T100000\n"
            "SUMMARY:Réunion équipe\n"
            "LOCATION:Bureau\n"
            "DESCRIPTION:Point hebdo\n"
            "END:VEVENT\n"
        )
        + ICS_FOOTER,
    )
    # recurring weekly event (10 occurrences)
    _write(
        cal / "recurring.ics",
        ICS_HEADER
        + (
            "BEGIN:VEVENT\n"
            "UID:evt-rrule@test\n"
            "DTSTAMP:20260101T000000Z\n"
            "DTSTART:20260302T070000\n"
            "DTEND:20260302T080000\n"
            "RRULE:FREQ=WEEKLY;COUNT=10\n"
            "SUMMARY:Présence matinale\n"
            "END:VEVENT\n"
        )
        + ICS_FOOTER,
    )
    # birthday (filtered by default via BIRTHDAY_PATTERN) + excluded summary
    _write(
        cal / "special.ics",
        ICS_HEADER
        + (
            "BEGIN:VEVENT\n"
            "UID:birth-1@test\n"
            "DTSTAMP:20260101T000000Z\n"
            "DTSTART;VALUE=DATE:20260410\n"
            "SUMMARY:Anniversaire Marc\n"
            "END:VEVENT\n"
            "BEGIN:VEVENT\n"
            "UID:trash-1@test\n"
            "DTSTAMP:20260101T000000Z\n"
            "DTSTART:20260316T180000\n"
            "SUMMARY:Poubelle verte\n"
            "END:VEVENT\n"
        )
        + ICS_FOOTER,
    )
    # VTODO on a second calendar
    cal2 = cr / "manuel" / "taches"
    _write(cal2 / ".Radicale.props", _cal_props("Tâches"))
    _write(
        cal2 / "todo.ics",
        ICS_HEADER
        + (
            "BEGIN:VTODO\n"
            "UID:todo-1@test\n"
            "DTSTAMP:20260101T000000Z\n"
            "DUE:20260320T170000\n"
            "STATUS:NEEDS-ACTION\n"
            "SUMMARY:Ranger le garage\n"
            "END:VTODO\n"
        )
        + ICS_FOOTER,
    )
    # user 'robert' with a family calendar
    cal3 = cr / "robert" / "famille"
    _write(cal3 / ".Radicale.props", _cal_props("Famille"))
    _write(cal3 / "x.ics", ICS_HEADER + ICS_FOOTER)  # empty calendar

    # VADDRESSBOOK (contacts) must be ignored
    _write(cr / "robert" / "contacts" / ".Radicale.props", '{"tag": "VADDRESSBOOK"}')
    # hidden dirs ignored
    (cr / ".stfolder").mkdir(parents=True)
    _write(cr / ".stfolder" / "x" / ".Radicale.props", '{"tag": "VCALENDAR"}')
    (cr / "manuel" / ".trash").mkdir(parents=True)
    _write(cr / "manuel" / ".trash" / "y.ics", ICS_HEADER + ICS_FOOTER)
    # corrupt props must be skipped with a warning
    _write(cr / "manuel" / "broken" / ".Radicale.props", "{not json")
    _write(cr / "manuel" / "broken" / "z.ics", ICS_HEADER + ICS_FOOTER)
    return root


@pytest.fixture(scope="module")
def server(radicale_tree):
    """Import the server module once per module with the fixture tree as data path."""
    os.environ["CALDAV_DATA_PATH"] = str(radicale_tree)
    os.environ["EXCLUDE_PATTERN"] = "^Poubelle"
    os.environ["BIRTHDAY_PATTERN"] = "^Anniversaire|^Anniv"
    import server  # noqa: E402

    return server


@pytest.fixture()
def server_mod(server, monkeypatch, radicale_tree):
    """Reset mutable module state around each test."""
    monkeypatch.setattr(server, "CALDAV_DATA_PATH", str(radicale_tree))
    return server