# Copyright (c) 2026 Krzysztof Rudnicki. MIT licence.
"""!co_jadł: today's food log, entry by entry, and never the budget."""

from __future__ import annotations

import json
import logging
from pathlib import Path
from typing import TYPE_CHECKING, Any

from signal_bot.animals import ALIAS_FILE
from signal_bot.context import CommandContext
from signal_bot.food_command import (
    COMMAND_NAME,
    DEFAULT_PATH,
    ENV_VAR,
    UNAVAILABLE,
    entry_line,
    register_food_command,
    render,
)
from signal_bot.help_command import GROUPS
from signal_bot.models import parse_envelope
from signal_bot.registry import CommandRegistry
from tests.conftest import WATCHED_GROUP, envelope

if TYPE_CHECKING:
    import pytest

    from signal_bot.config import Config
    from signal_bot.registry import Handler
    from signal_bot.store import Store
    from signal_bot.transport_fake import FakeTransport

ALIASES = {COMMAND_NAME: ["!co_jadł", "!dieta"]}
DAY = "2026-09-04"
CARBONARA: dict[str, Any] = {
    "time": "2026-09-04T06:37:19+02:00",
    "desc": "carbonara",
    "grams": 0,
    "kcal": 550,
    "protein_g": 20,
    "carbs_g": 0,
    "fat_g": 30,
    "source": "manual",
    "id": "x",
    "hmac": "y",
}
BANK: dict[str, Any] = {
    "time": "2026-09-04T09:59:38+02:00",
    "desc": "nothing",
    "grams": 400.0,
    "kcal": 0.0,
    "protein_g": 0.0,
    "carbs_g": 0.0,
    "fat_g": 0.0,
    "source": "food bank",
    "slot": 8,
}


def _log(tmp_path: Path, document: object) -> Path:
    path = tmp_path / "food_log.json"
    path.write_text(json.dumps(document), encoding="utf-8")
    return path


async def _run(
    store: Store, transport: FakeTransport, config: Config, path: Path | None, text: str
) -> None:
    registry = CommandRegistry()
    register_food_command(registry, aliases=ALIASES, path=path)
    message = parse_envelope(envelope(text=text))
    assert message is not None
    resolved = registry.resolve_with_args(text, WATCHED_GROUP)
    assert resolved is not None
    ctx = CommandContext(
        message=message,
        group_id=WATCHED_GROUP,
        transport=transport,
        store=store,
        config=config,
        command_name=resolved.command.name,
        now=1_000.0,
        day=DAY,
        args=resolved.args,
    )
    await resolved.command.handler(ctx)


def test_the_day_is_the_total_then_every_entry_then_the_macros() -> None:
    assert render(DAY, [CARBONARA, BANK]) == (
        "🍽️ 4 września — 2 wpisy, 550 kcal\n"
        "06:37 carbonara — 550 kcal (manual)\n"
        "09:59 nothing — 400 g, 0 kcal (food bank)\n"
        "Razem: B 20 g · W 0 g · T 30 g"
    )


def test_a_day_with_no_macros_logged_has_no_macro_line() -> None:
    text = render(DAY, [BANK])
    assert text.startswith("🍽️ 4 września — 1 wpis, 0 kcal\n")
    assert "Razem" not in text


def test_an_empty_day_says_so() -> None:
    assert render(DAY, []) == "🍽️ 4 września — nic jeszcze nie zalogowano."


def test_an_entry_missing_its_fields_still_renders() -> None:
    """A bool in a number field counts as nothing, an unparsable time as unknown."""
    assert entry_line({"desc": "x", "kcal": True, "grams": "9"}) == "??:?? x — 0 kcal"
    assert entry_line({"time": "2026-09-04T11:00:00", "source": " "}) == "11:00 ? — 0 kcal"


async def test_the_command_replies_with_todays_log(
    store: Store, transport: FakeTransport, config: Config, tmp_path: Path
) -> None:
    path = _log(tmp_path, {DAY: [CARBONARA], "2026-09-03": [BANK]})
    await _run(store, transport, config, path, "!dieta")
    (sent,) = transport.sent
    assert "carbonara" in sent.text
    assert "nothing" not in sent.text
    assert sent.quote is not None


async def test_a_log_that_cannot_be_read_is_said_to_be_unavailable(
    store: Store,
    transport: FakeTransport,
    config: Config,
    tmp_path: Path,
    caplog: pytest.LogCaptureFixture,
) -> None:
    """Not "nothing today": an absent file is not an empty day."""
    with caplog.at_level(logging.WARNING, logger="signal_bot.food_command"):
        await _run(store, transport, config, tmp_path / "absent.json", "!co_jadł")
    assert transport.texts == [UNAVAILABLE]
    assert "food log unavailable" in caplog.text


async def test_without_a_path_the_environment_decides(
    store: Store,
    transport: FakeTransport,
    config: Config,
    tmp_path: Path,
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    monkeypatch.setenv(ENV_VAR, str(_log(tmp_path, {DAY: [BANK]})))
    await _run(store, transport, config, None, "!co_jadł")
    assert "food bank" in transport.texts[0]


def test_the_default_is_where_diet_guard_writes() -> None:
    assert DEFAULT_PATH.endswith("diet_guard/food_log.json")


def test_a_decorator_wraps_the_handler() -> None:
    seen: list[str] = []

    def decorate(handler: Handler) -> Handler:
        seen.append("wrapped")
        return handler

    registry = CommandRegistry()
    register_food_command(registry, aliases=ALIASES, decorate=decorate, path=Path("/nowhere"))
    assert seen == ["wrapped"]
    assert registry.resolve("!dieta", WATCHED_GROUP) is not None


def test_the_shipped_spellings_are_plain_words_and_nothing_more() -> None:
    """The trigger with the surname lives in aliases_custom.json; this list is pinned."""
    triggers = json.loads(ALIAS_FILE.read_text(encoding="utf-8"))[COMMAND_NAME]
    assert triggers[0] == "!co_jadł"
    assert {t[1:].replace("_", "") for t in triggers} == {"cojadł", "cojadl", "jedzenie", "dieta"}


def test_help_files_it_under_the_diary_heading() -> None:
    assert any(COMMAND_NAME in names for _, names in GROUPS)