# Copyright (c) 2026 Krzysztof Rudnicki. MIT licence.
"""Scenario loading, rendering and adjudication."""

from __future__ import annotations

import json
from pathlib import Path

import pytest

from fake_signal.scenario import (
    Expectation,
    Injection,
    Scenario,
    ScenarioError,
    check,
    describe,
    load_scenario,
)
from signal_bot.models import parse_envelope

GROUPS = {"watched": "W==", "reply": "R==", "other": "O=="}


def _write(tmp_path: Path, document: str) -> Path:
    path = tmp_path / "s.yaml"
    path.write_text(document, encoding="utf-8")
    return path


def test_ships_scenarios_load_and_are_valid() -> None:
    paths = sorted(Path("fake_signal/scenarios").glob("*.yaml"))
    assert paths
    for path in paths:
        assert load_scenario(path).name


def test_injection_renders_a_parseable_group_envelope() -> None:
    frame = Injection(text="!cat").to_frame(GROUPS)
    message = parse_envelope(frame)
    assert message is not None
    assert message.text == "!cat"
    assert message.group_id == "W=="


def test_injection_renders_a_direct_message() -> None:
    message = parse_envelope(Injection(text="hi", group=None).to_frame(GROUPS))
    assert message is not None
    assert message.is_direct_message


def test_injection_renders_sync_sticker_and_reaction() -> None:
    sticker = parse_envelope(Injection(sticker=True, sync=True).to_frame(GROUPS))
    reaction = parse_envelope(Injection(reaction=True).to_frame(GROUPS))
    assert sticker is not None
    assert sticker.has_sticker
    assert reaction is not None
    assert reaction.is_reaction


def test_unknown_group_alias_is_rejected() -> None:
    with pytest.raises(ScenarioError, match="unknown group alias"):
        Injection(group="nope").to_frame(GROUPS)


def test_loads_a_full_scenario(tmp_path: Path) -> None:
    path = _write(
        tmp_path,
        "name: demo\ninject:\n  - {text: '!cat'}\nexpect:\n  - {kind: image}\n",
    )
    scenario = load_scenario(path)
    assert scenario.name == "demo"
    assert scenario.inject[0].text == "!cat"
    assert scenario.expect[0].kind == "image"


@pytest.mark.parametrize(
    ("document", "match"),
    [
        ("- a list\n", "must contain a mapping"),
        ("inject: []\n", "missing a name"),
        ("name: x\ninject:\n  - {bogus: 1}\n", "unknown inject keys"),
        ("name: x\nexpect:\n  - {bogus: 1}\n", "unknown expect keys"),
        ("name: x\ninject:\n  - not-a-mapping\n", "must be a mapping"),
    ],
)
def test_malformed_scenarios_are_rejected(tmp_path: Path, document: str, match: str) -> None:
    with pytest.raises(ScenarioError, match=match):
        load_scenario(_write(tmp_path, document))


def test_describe_classifies_sends() -> None:
    assert describe({"message": "hi", "recipients": ["R=="]}) == ("text", "R==", "hi")
    assert describe({"base64_attachments": ["A"], "recipients": ["R=="]})[0] == "image"
    assert describe({})[1] == ""


def test_check_passes_on_a_match() -> None:
    scenario = Scenario("s", expect=[Expectation(kind="image", to="reply")])
    sent = [{"base64_attachments": ["A"], "recipients": ["R=="]}]
    assert check(scenario, sent, GROUPS) == []


def test_check_reports_a_count_mismatch() -> None:
    scenario = Scenario("s", expect=[Expectation()])
    failures = check(scenario, [], GROUPS)
    assert "expected 1 send(s), captured 0" in failures[0]
    assert any("missing" in line for line in failures)


def test_check_reports_kind_recipient_and_body() -> None:
    scenario = Scenario("s", expect=[Expectation(kind="image", to="reply", contains="nope")])
    sent = [{"message": "hello", "recipients": ["W=="]}]
    failures = check(scenario, sent, GROUPS)
    assert any("kind:" in f for f in failures)
    assert any("recipient:" in f for f in failures)
    assert any("body:" in f for f in failures)


def test_check_accepts_a_literal_recipient() -> None:
    scenario = Scenario("s", expect=[Expectation(to="literal==")])
    assert check(scenario, [{"message": "", "recipients": ["literal=="]}], GROUPS) == []


def test_unexpected_sends_are_a_failure() -> None:
    """A scoping regression shows up here: expect [] and the bot replied."""
    failures = check(Scenario("s"), [{"message": "leak", "recipients": ["R=="]}], GROUPS)
    assert "expected 0 send(s), captured 1" in failures[0]


def test_frame_is_json() -> None:
    assert json.loads(Injection().to_frame(GROUPS))["account"] == "+15550000000"