"""Divination AI — runtime client for the Modal backend."""
from __future__ import annotations

import os

import httpx

API_URL = os.environ.get(
    "DIVINATION_AI_API_URL",
    "https://rafalbogusdxc--divination-ai-api.modal.run",
).rstrip("/")

TIMEOUT_S = 900


class BackendError(RuntimeError):
    pass


def health() -> dict:
    try:
        resp = httpx.get(f"{API_URL}/health", timeout=10, follow_redirects=True)
        resp.raise_for_status()
        return resp.json()
    except Exception:
        return {"status": "unreachable"}


def intake(messages: list[dict]) -> dict:
    try:
        resp = httpx.post(
            f"{API_URL}/intake",
            json={"messages": messages},
            timeout=TIMEOUT_S,
            follow_redirects=True,
        )
        resp.raise_for_status()
        return resp.json()
    except httpx.ConnectError as e:
        raise BackendError("Cannot reach the Oracle backend — is the Modal app deployed?") from e
    except httpx.ReadTimeout as e:
        raise BackendError("The Oracle is taking too long to respond (cold start). Try again in ~1 minute.") from e
    except httpx.HTTPStatusError as e:
        raise BackendError(f"Backend error {e.response.status_code}: {e.response.text[:300]}") from e


def generate(messages: list[dict]) -> dict:
    try:
        resp = httpx.post(
            f"{API_URL}/generate",
            json={"messages": messages},
            timeout=TIMEOUT_S,
            follow_redirects=True,
        )
        resp.raise_for_status()
        return resp.json()
    except httpx.ConnectError as e:
        raise BackendError("Cannot reach the Oracle backend — is the Modal app deployed?") from e
    except httpx.ReadTimeout as e:
        raise BackendError("The Oracle is taking too long (generation in progress). Please wait...") from e
    except httpx.HTTPStatusError as e:
        raise BackendError(f"Backend error {e.response.status_code}: {e.response.text[:300]}") from e


def share_trace(messages: list[dict]) -> dict:
    try:
        resp = httpx.post(
            f"{API_URL}/share",
            json={"messages": messages},
            timeout=30,
            follow_redirects=True,
        )
        resp.raise_for_status()
        return resp.json()
    except Exception:
        return {"shared": False, "reason": "Network error"}