"""Supabase REST client (via httpx) for blind-test storage.

We call PostgREST endpoints directly to avoid pulling the full `supabase`
Python SDK (which drags `realtime` → `websockets>=13`, conflicting with
gradio-client 1.3's `websockets<13` pin).

Env vars:
  SUPABASE_URL — project URL (e.g. https://xxx.supabase.co)
  SUPABASE_KEY — anon or service_role key

If either is missing, all writes become no-ops.
"""

from __future__ import annotations

import os
from dataclasses import dataclass
from typing import Any

import httpx

_URL = os.getenv("SUPABASE_URL", "").strip().rstrip("/")
_KEY = os.getenv("SUPABASE_KEY", "").strip()

_last_error: str | None = None

print(
    f"[blindtest.db] httpx-rest"
    f" | SUPABASE_URL={'set' if _URL else 'MISSING'}"
    f" | SUPABASE_KEY={'set' if _KEY else 'MISSING'}"
)


def is_configured() -> bool:
    return bool(_URL and _KEY)


def last_error() -> str | None:
    return _last_error


def _record_error(where: str, exc: Exception) -> None:
    global _last_error
    _last_error = f"{where}: {exc}"
    print(f"[blindtest.db] {_last_error}")


def _headers(prefer_return: bool = True) -> dict[str, str]:
    h = {
        "apikey": _KEY,
        "Authorization": f"Bearer {_KEY}",
        "Content-Type": "application/json",
    }
    if prefer_return:
        h["Prefer"] = "return=representation"
    return h


def _post(table: str, row: dict) -> list[dict]:
    url = f"{_URL}/rest/v1/{table}"
    with httpx.Client(timeout=10.0) as c:
        resp = c.post(url, headers=_headers(True), json=row)
    if resp.status_code >= 300:
        raise RuntimeError(f"{resp.status_code} {resp.text}")
    return resp.json() if resp.content else []


def _get(table: str, params: dict[str, str] | None = None) -> list[dict]:
    url = f"{_URL}/rest/v1/{table}"
    with httpx.Client(timeout=10.0) as c:
        resp = c.get(url, headers=_headers(False), params=params or {})
    if resp.status_code >= 300:
        raise RuntimeError(f"{resp.status_code} {resp.text}")
    return resp.json() if resp.content else []


@dataclass
class RunRecord:
    run_id: int | None
    pipeline_key: str
    output: str
    processing_time_s: float


@dataclass
class TaskRecord:
    task_id: int | None
    article_id: int | None
    slot_a_run: RunRecord
    slot_b_run: RunRecord


def save_article(source_text: str) -> int | None:
    if not is_configured():
        return None
    try:
        data = _post("articles", {"source_text": source_text})
        return data[0]["id"] if data else None
    except Exception as exc:
        _record_error("save_article", exc)
        return None


def save_pipeline_run(
    article_id: int | None,
    pipeline_key: str,
    prompt_key: str,
    model: str,
    output: str,
    processing_time_s: float,
) -> int | None:
    if not is_configured() or article_id is None:
        return None
    try:
        data = _post(
            "pipeline_runs",
            {
                "article_id": article_id,
                "pipeline_key": pipeline_key,
                "prompt_key": prompt_key,
                "model": model,
                "output": output,
                "processing_time_s": processing_time_s,
            },
        )
        return data[0]["id"] if data else None
    except Exception as exc:
        _record_error("save_pipeline_run", exc)
        return None


def save_task(
    article_id: int | None,
    run_a_id: int | None,
    run_b_id: int | None,
) -> int | None:
    if not is_configured() or article_id is None:
        return None
    try:
        data = _post(
            "tasks",
            {"article_id": article_id, "run_a_id": run_a_id, "run_b_id": run_b_id},
        )
        return data[0]["id"] if data else None
    except Exception as exc:
        _record_error("save_task", exc)
        return None


def save_rating(pipeline_run_id: int | None, rating: str, comment: str) -> bool:
    """Save Good / Not Bad / Critical rating for a single pipeline run."""
    if not is_configured() or pipeline_run_id is None:
        return False
    try:
        _post(
            "ratings",
            {
                "pipeline_run_id": pipeline_run_id,
                "rating": rating,
                "comment": comment or None,
            },
        )
        return True
    except Exception as exc:
        _record_error("save_rating", exc)
        return False


def fetch_rating_counts() -> dict[str, int]:
    if not is_configured():
        return {}
    try:
        rows = _get("ratings", {"select": "rating"})
        counts: dict[str, int] = {}
        for row in rows:
            counts[row["rating"]] = counts.get(row["rating"], 0) + 1
        return counts
    except Exception as exc:
        _record_error("fetch_rating_counts", exc)
        return {}


def save_vote(task_id: int | None, choice: str, comment: str) -> bool:
    if not is_configured() or task_id is None:
        return False
    try:
        _post(
            "votes",
            {"task_id": task_id, "choice": choice, "comment": comment or None},
        )
        return True
    except Exception as exc:
        _record_error("save_vote", exc)
        return False


def fetch_summary() -> list[dict]:
    if not is_configured():
        return []
    try:
        return _get("vote_summary", {"select": "*"})
    except Exception as exc:
        _record_error("fetch_summary", exc)
        return []


def fetch_vote_counts() -> dict[str, int]:
    if not is_configured():
        return {}
    try:
        rows = _get("votes", {"select": "choice"})
        counts: dict[str, int] = {}
        for row in rows:
            counts[row["choice"]] = counts.get(row["choice"], 0) + 1
        return counts
    except Exception as exc:
        _record_error("fetch_vote_counts", exc)
        return {}