"""HTTP contracts for POST /api/western and POST /api/ephemeris_events."""

from __future__ import annotations

import json
from io import BytesIO

import pytest

from scripts.api_heavy_compute_gate import reset_heavy_compute_gate
from scripts.jyotish_api_server import (
    DEFAULT_ALLOWED_HOSTS,
    DEFAULT_ALLOWED_ORIGINS,
    JyotishAPIHandler,
)

SAMPLE = {
    "year": 1990,
    "month": 4,
    "day": 9,
    "hour": 13,
    "minute": 24,
    "lat": 31.19,
    "lon": 121.44,
    "tz": 8,
}


class _FakeHeaders(dict):
    def get(self, key, default=None):
        return super().get(key, default)


class _FakeServer:
    allowed_origins = DEFAULT_ALLOWED_ORIGINS
    allowed_hosts = DEFAULT_ALLOWED_HOSTS


class _PostCaptureHandler(JyotishAPIHandler):
    def __init__(self, path: str, payload: dict) -> None:
        raw = json.dumps(payload).encode("utf-8")
        self.headers = _FakeHeaders(
            {
                "Content-Length": str(len(raw)),
                "Content-Type": "application/json",
            }
        )
        self.server = _FakeServer()
        self.path = path
        self.rfile = BytesIO(raw)
        self.wfile = BytesIO()
        self.status_code = None
        self.response_headers = []
        self.client_address = ("test-readonly-chart", 0)

    def send_response(self, code, message=None):  # noqa: ANN001
        self.status_code = code

    def send_header(self, key, value):  # noqa: ANN001
        self.response_headers.append((key, value))

    def end_headers(self):
        return None

    def payload(self) -> dict:
        return json.loads(self.wfile.getvalue().decode("utf-8"))


@pytest.fixture
def api_env(monkeypatch):
    monkeypatch.setenv("JYOTISH_API_RATE_LIMIT_PER_MINUTE", "0")
    reset_heavy_compute_gate()
    yield
    reset_heavy_compute_gate()


def test_western_returns_planets_cusps_aspects_and_distribution(api_env) -> None:
    handler = _PostCaptureHandler("/api/western", SAMPLE)
    handler.do_POST()
    assert handler.status_code == 200
    payload = handler.payload()
    natal = payload["natal"]
    assert payload["zodiac"] == "tropical"
    assert payload["house_system"] == "P"
    assert payload["coordinate_system"] == "tropical_ecliptic"
    assert len(natal["planets"]) == 11
    assert len(natal["houses"]) == 12
    assert natal["aspects"]
    assert set(natal["distribution"]["elements"]) == {"fire", "earth", "air", "water"}
    assert "岁差" in payload["boundary"] or "ayanamsa" in json.dumps(payload["sidereal_offset_degrees"])


def test_western_house_system_can_be_overridden_and_echoed(api_env) -> None:
    handler = _PostCaptureHandler("/api/western", {**SAMPLE, "house_system": "K"})
    handler.do_POST()
    assert handler.status_code == 200
    payload = handler.payload()
    assert payload["house_system"] == "K"
    placidus = _PostCaptureHandler("/api/western", SAMPLE)
    placidus.do_POST()
    assert placidus.payload()["house_system"] == "P"
    assert (
        placidus.payload()["natal"]["houses"][2]["cusp"]["longitude"]
        != payload["natal"]["houses"][2]["cusp"]["longitude"]
    )


def test_ephemeris_events_90_day_window_has_sorted_ingress_and_station(api_env) -> None:
    handler = _PostCaptureHandler(
        "/api/ephemeris_events",
        {
            "start_date": "2026-09-15",
            "end_date": "2026-12-14",
            "ayanamsa": "raman",
            "node_mode": "mean",
        },
    )
    handler.do_POST()
    assert handler.status_code == 200
    payload = handler.payload()
    events = payload["events"]
    kinds = {item["kind"] for item in events}
    assert "ingress" in kinds
    assert "station" in kinds
    dates = [item["date"] for item in events]
    assert dates == sorted(dates)
    assert payload["calculation"]["ayanamsa"] == "raman"
    assert len(events) == 14


def test_ephemeris_events_rejects_range_over_730_days(api_env) -> None:
    handler = _PostCaptureHandler(
        "/api/ephemeris_events",
        {"start_date": "2026-01-01", "end_date": "2028-01-02", "ayanamsa": "raman"},
    )
    handler.do_POST()
    assert handler.status_code == 400
    payload = handler.payload()
    assert payload["success"] is False
    assert "730" in payload["error"]


def test_ephemeris_ayanamsa_changes_the_event_list(api_env) -> None:
    raman = _PostCaptureHandler(
        "/api/ephemeris_events",
        {"start_date": "2026-09-15", "end_date": "2026-12-14", "ayanamsa": "raman"},
    )
    lahiri = _PostCaptureHandler(
        "/api/ephemeris_events",
        {"start_date": "2026-09-15", "end_date": "2026-12-14", "ayanamsa": "lahiri"},
    )
    raman.do_POST()
    lahiri.do_POST()
    assert raman.status_code == 200
    assert lahiri.status_code == 200
    assert raman.payload()["events"] != lahiri.payload()["events"]
    assert raman.payload()["calculation"]["ayanamsa"] == "raman"
    assert lahiri.payload()["calculation"]["ayanamsa"] == "lahiri"