"""Shared pytest fixtures for testing the TryMe FastMCP HTTP server."""

from __future__ import annotations

import json
from dataclasses import dataclass, field
from typing import Any

import httpx
import pytest

from app.client import TryMeClient
from app.config import Settings
from app.main import get_client, set_client


@dataclass
class RecordedCall:
    """Captured upstream HTTP request made by TryMeClient."""

    method: str
    path: str
    query: dict[str, str]
    headers: dict[str, str]
    body: Any


@dataclass
class UpstreamMockState:
    """Stateful recorder and configurable responder for MockTransport."""

    calls: list[RecordedCall] = field(default_factory=list)
    next_status: int | None = None
    next_json: Any = None
    next_headers: dict[str, str] = field(default_factory=dict)


@pytest.fixture
def mock_upstream() -> Any:
    """Install a MockTransport-backed TryMeClient and restore original client afterward."""
    state = UpstreamMockState()
    original_client = get_client()

    async def handler(request: httpx.Request) -> httpx.Response:
        raw_body = request.content.decode("utf-8") if request.content else ""
        parsed_body: Any = None
        if raw_body:
            try:
                parsed_body = json.loads(raw_body)
            except Exception:
                parsed_body = raw_body

        state.calls.append(
            RecordedCall(
                method=request.method,
                path=request.url.path,
                query=dict(request.url.params),
                headers={k.lower(): v for k, v in request.headers.items()},
                body=parsed_body,
            )
        )

        if state.next_status is not None:
            status = state.next_status
            payload = state.next_json
            resp_headers = dict(state.next_headers)
            state.next_status = None
            state.next_json = None
            state.next_headers.clear()
            if status == 204 or (300 <= status < 400 and payload is None):
                return httpx.Response(status_code=status, headers=resp_headers)
            return httpx.Response(status_code=status, json=payload, headers=resp_headers)

        # Default realistic responses by method + path
        path = request.url.path
        method = request.method.upper()

        if path == "/health":
            return httpx.Response(200, json={"status": "ok", "service": "trymeapp", "version": "0.2"})
        if path == "/api/v1/auth/config":
            return httpx.Response(
                200,
                json={
                    "auth0_enabled": True,
                    "auth0_domain": "example.us.auth0.com",
                    "auth0_client_id": "client123",
                    "auth0_audience": "",
                    "dev_auth_enabled": True,
                    "admin_unclaimed": False,
                },
            )
        if path in ("/api/v1/auth/login", "/api/v1/auth/callback"):
            return httpx.Response(
                302,
                headers={"location": "https://example.us.auth0.com/authorize"},
            )
        if path == "/api/v1/auth/dev-login":
            return httpx.Response(
                200,
                json={
                    "access_token": "dev-jwt-token",
                    "token_type": "bearer",
                    "user": {"id": 1, "nickname": parsed_body.get("nickname", "tester")},
                },
            )
        if method in ("DELETE", "POST") and path in (
            "/api/v1/auth/logout",
        ):
            return httpx.Response(204)
        if method == "DELETE" and (
            path.startswith("/api/v1/quizzes/") or path.startswith("/api/v1/admin/quizzes/")
        ):
            return httpx.Response(204)
        if path in (
            "/api/v1/users/me/scores",
            "/api/v1/users/me/api-keys",
            "/api/v1/quizzes",
            "/api/v1/favourites",
            "/api/v1/admin/users",
            "/api/v1/admin/quizzes",
        ) and method == "GET":
            return httpx.Response(200, json=[{"ok": True, "path": path}])
        if path.startswith("/api/v1/favourites") and method in ("POST", "PUT", "DELETE"):
            return httpx.Response(200, json=[{"favourite_id": 1, "position": 0, "quiz": {"id": 10}}])

        return httpx.Response(200, json={"ok": True, "method": method, "path": path, "body": parsed_body})

    test_settings = Settings(
        version="0.1",
        mcp_host="0.0.0.0",
        mcp_port=8000,
        mcp_path="/mcp",
        tryme_base_url="https://tryme.tpk.pw",
        tryme_timeout_seconds=10.0,
        tryme_api_key="env-default-key",
        tryme_bearer_token=None,
        tryme_session_cookie=None,
    )
    client = TryMeClient(config=test_settings, transport=httpx.MockTransport(handler))
    set_client(client)
    try:
        yield state
    finally:
        set_client(original_client)