from datetime import datetime, timezone
from typing import Any
from slugify import slugify as _slugify
from supabase import Client


def slugify(title: str, artist: str, max_len: int = 80) -> str:
    raw = _slugify(f"{title} {artist}")
    return raw[:max_len].rstrip("-")


_TERMINAL = {"ready", "failed_fetch", "failed_separation", "failed_other"}


class SongRepo:
    def __init__(self, client: Client):
        self._c = client

    # songs ---------------------------------------------------------------
    def get_song(self, youtube_id: str) -> dict | None:
        res = (
            self._c.table("songs").select("*")
            .eq("youtube_id", youtube_id).maybe_single().execute()
        )
        return res.data if res else None

    def get_song_by_slug(self, slug: str) -> dict | None:
        res = (
            self._c.table("songs").select("*")
            .eq("slug", slug).eq("status", "ready").maybe_single().execute()
        )
        return res.data if res else None

    def upsert_song(self, row: dict[str, Any]) -> None:
        self._c.table("songs").upsert(row, on_conflict="youtube_id").execute()

    def increment_play_count(self, youtube_id: str) -> None:
        # Best-effort, ignore the row if missing.
        self._c.rpc("increment_play_count", {"yt_id": youtube_id}).execute()

    # jobs ----------------------------------------------------------------
    def create_job(self, youtube_id: str) -> str:
        res = self._c.table("jobs").insert(
            {"youtube_id": youtube_id, "status": "queued"}
        ).execute()
        return res.data[0]["id"]

    def update_job(self, job_id: str, *, status: str, error: str | None = None) -> None:
        patch: dict[str, Any] = {"status": status, "error": error}
        if status in _TERMINAL:
            patch["finished_at"] = datetime.now(timezone.utc).isoformat()
        self._c.table("jobs").update(patch).eq("id", job_id).execute()

    def get_job(self, job_id: str) -> dict | None:
        res = (
            self._c.table("jobs").select("*")
            .eq("id", job_id).maybe_single().execute()
        )
        return res.data if res else None