import importlib
import json
from pathlib import Path
from typing import Any

from fastapi.testclient import TestClient

import app as babble_app


class FakeTelegramClient:
    requests: list[dict[str, Any]] = []
    status_code = 200
    text = "{\"ok\":true}"

    def __init__(self, *args: Any, **kwargs: Any) -> None:
        del args, kwargs

    async def __aenter__(self) -> "FakeTelegramClient":
        return self

    async def __aexit__(self, *args: Any) -> None:
        del args

    async def post(self, url: str, json: dict[str, Any]) -> "FakeTelegramClient":
        self.requests.append({"url": url, "json": json})
        return self


class TimeoutTelegramClient(FakeTelegramClient):
    async def post(self, url: str, json: dict[str, Any]) -> "FakeTelegramClient":
        del url, json
        raise babble_app.httpx.ConnectTimeout("timeout", request=None)


def load_app(monkeypatch, **env):
    monkeypatch.setenv("REQUIRE_MODEL", "false")
    monkeypatch.setenv("MEMORY_ENABLED", "false")
    for key, value in env.items():
        monkeypatch.setenv(key, value)

    return importlib.reload(babble_app)


def configure_webhook(monkeypatch, **env):
    reloaded_app = load_app(
        monkeypatch,
        WEBHOOK_SECRET="expected-secret",
        TELEGRAM_BOT_TOKEN="fake-token",
        LLM_PROVIDER="stub",
        **env,
    )
    FakeTelegramClient.requests = []
    monkeypatch.setattr(reloaded_app.httpx, "AsyncClient", FakeTelegramClient)
    return reloaded_app


def test_health_endpoint(monkeypatch) -> None:
    reloaded_app = load_app(monkeypatch, LLM_PROVIDER="stub")
    client = TestClient(reloaded_app.create_app())

    response = client.get("/health")

    assert response.status_code == 200
    body = response.json()
    assert body["ok"] is True
    assert body["service"] == "babble"
    assert body["model"] == "Qwen/Qwen3-0.6B"
    assert body["loaded"] is False
    assert body["persona"] == "default"


def test_persona_endpoint_lists_available_personas(monkeypatch) -> None:
    reloaded_app = load_app(monkeypatch, LLM_PROVIDER="stub")
    client = TestClient(reloaded_app.create_app())

    response = client.get("/persona")

    assert response.status_code == 200
    body = response.json()
    assert body["active_persona"]["persona_id"] == "default"
    assert body["active_persona"]["name"] == "Babble"
    assert "playful" in body["available_personas"]


def test_menu_endpoint_shows_commands(monkeypatch) -> None:
    reloaded_app = load_app(monkeypatch, LLM_PROVIDER="stub")
    client = TestClient(reloaded_app.create_app())

    response = client.get("/menu")

    assert response.status_code == 200
    text = response.json()["text"]
    assert "/persona [id]" in text
    assert "/character key=value ..." in text
    assert "Available personas" in text


def test_webhook_rejects_wrong_secret(monkeypatch) -> None:
    reloaded_app = configure_webhook(monkeypatch)
    client = TestClient(reloaded_app.create_app())

    response = client.post(
        "/telegram/webhook/wrong-secret",
        json={"message": {"chat": {"id": 123}, "text": "hello"}},
    )

    assert response.status_code == 403
    assert FakeTelegramClient.requests == []


def test_start_sends_telegram_message_payload(monkeypatch) -> None:
    reloaded_app = configure_webhook(monkeypatch)
    client = TestClient(reloaded_app.create_app())

    response = client.post(
        "/telegram/webhook/expected-secret",
        json={"message": {"chat": {"id": 123}, "text": " /start "}},
    )

    assert response.status_code == 200
    assert response.json() == {"ok": True, "sent": True}
    request = FakeTelegramClient.requests[-1]
    assert request["url"] == "https://api.telegram.org/botfake-token/sendMessage"
    assert request["json"]["chat_id"] == 123
    assert request["json"]["text"] == "Hey, I’m here. What kind of mood are we in tonight?"
    assert "reply_markup" in request["json"]
    assert request["json"]["reply_markup"]["keyboard"][0] == [
        "Menu",
        "Characters",
        "Build Character",
    ]


def test_telegram_timeout_falls_back_to_webhook_payload(monkeypatch) -> None:
    reloaded_app = load_app(
        monkeypatch,
        WEBHOOK_SECRET="expected-secret",
        TELEGRAM_BOT_TOKEN="fake-token",
        LLM_PROVIDER="stub",
    )
    monkeypatch.setattr(reloaded_app.httpx, "AsyncClient", TimeoutTelegramClient)
    client = TestClient(reloaded_app.create_app())

    response = client.post(
        "/telegram/webhook/expected-secret",
        json={"message": {"chat": {"id": 123}, "text": "hello"}},
    )

    assert response.status_code == 200
    assert response.json() == {
        "method": "sendMessage",
        "chat_id": 123,
        "text": "Babble stub response: backend online and ready.",
        "reply_markup": {
            "keyboard": [
                ["Menu", "Characters", "Build Character"],
                ["Warm", "Romantic", "Playful", "Deep"],
                ["Babble", "Charlotte", "Jaylaa"],
                ["Memory On", "Reset", "Help"],
            ],
            "resize_keyboard": True,
            "is_persistent": True,
            "input_field_placeholder": "Tap a button or send a message",
        },
    }


def test_persona_command_switches_active_persona(monkeypatch) -> None:
    reloaded_app = configure_webhook(monkeypatch)
    client = TestClient(reloaded_app.create_app())

    response = client.post(
        "/telegram/webhook/expected-secret",
        json={"message": {"chat": {"id": 123}, "text": "/persona playful"}},
    )

    assert response.status_code == 200
    assert FakeTelegramClient.requests[-1]["json"]["text"] == (
        "Persona switched to playful (Charlotte)."
    )

    client.post(
        "/telegram/webhook/expected-secret",
        json={"message": {"chat": {"id": 123}, "text": "/menu"}},
    )
    assert "playful" in FakeTelegramClient.requests[-1]["json"]["text"]


def test_character_command_updates_custom_profile(monkeypatch) -> None:
    reloaded_app = configure_webhook(monkeypatch)
    client = TestClient(reloaded_app.create_app())

    response = client.post(
        "/telegram/webhook/expected-secret",
        json={
            "message": {
                "chat": {"id": 123},
                "text": (
                    '/character name=Nova age=21 gender=woman '
                    'style="teasing and warm" voice=soft mood=curious '
                    'boundaries="adult romance only" opening="Come closer."'
                ),
            }
        },
    )

    assert response.status_code == 200
    text = FakeTelegramClient.requests[-1]["json"]["text"]
    assert "Character updated." in text
    assert "Nova" in text
    assert "Age: 21" in text


def test_missing_message_does_not_crash(monkeypatch) -> None:
    reloaded_app = configure_webhook(monkeypatch)
    client = TestClient(reloaded_app.create_app())

    response = client.post("/telegram/webhook/expected-secret", json={"ok": True})

    assert response.status_code == 200
    assert response.json() == {"ok": True, "ignored": "missing_chat_id"}
    assert FakeTelegramClient.requests == []


def test_memory_store_persists_turns(tmp_path: Path, monkeypatch) -> None:
    memory_path = tmp_path / "chat_memory.json"
    reloaded_app = load_app(
        monkeypatch,
        MEMORY_ENABLED="true",
        MEMORY_PATH=str(memory_path),
        LLM_PROVIDER="stub",
    )

    record = reloaded_app._default_session_record()
    record = reloaded_app._record_turn(record, "user", "hello")
    record = reloaded_app._record_turn(record, "assistant", "hi there")
    reloaded_app._set_session_record("123", record)

    assert memory_path.exists()
    payload = json.loads(memory_path.read_text(encoding="utf-8"))
    assert payload["123"]["memory"]["turns"][-2:] == [
        {"role": "user", "text": "hello"},
        {"role": "assistant", "text": "hi there"},
    ]


def test_debug_config_reports_persona_and_memory(monkeypatch) -> None:
    reloaded_app = load_app(
        monkeypatch,
        DEBUG="true",
        LLM_PROVIDER="stub",
        PERSONA_ID="playful",
    )
    client = TestClient(reloaded_app.create_app())

    response = client.get("/debug/config")

    assert response.status_code == 200
    body = response.json()
    assert body["persona_id"] == "playful"
    assert body["persona_name"] == "Charlotte"
    assert body["memory_enabled"] is False
    assert body["persona_count"] >= 3


def test_debug_model_surfaces_local_model_failure(monkeypatch) -> None:
    reloaded_app = load_app(
        monkeypatch,
        DEBUG="true",
        LOCAL_MODEL_ENABLED="false",
    )
    client = TestClient(reloaded_app.create_app())

    response = client.get("/debug/model")

    assert response.status_code == 200
    body = response.json()
    assert body["ok"] is False
    assert body["error"] == "RuntimeError"
    assert body["detail"] == "Local model is disabled"


def test_model_endpoint_respects_provider_knob(monkeypatch) -> None:
    reloaded_app = load_app(monkeypatch, LLM_PROVIDER="stub")
    client = TestClient(reloaded_app.create_app())

    response = client.get("/model")

    assert response.status_code == 200
    body = response.json()
    assert body["model_id"] == "Qwen/Qwen3-0.6B"
    assert body["enabled"] is False
    assert body["loaded"] is False
    assert body["persona_id"] == "default"
    assert body["memory_enabled"] is False