from pathlib import Path

from fastapi import APIRouter, HTTPException, Request

from .. import database as db, jobs
from ..config import merge_campaign_settings_with_env
from ..pipeline.turns import load_turns
from ..pipeline.summarize import summarize_session

router = APIRouter(prefix="/api/sessions/{session_id}/notes", tags=["notes"])


@router.post("/generate")
async def generate_notes(session_id: str, request: Request):
    body = await request.json() if request.headers.get("content-type") else {}
    session = db.get_conn().execute("SELECT * FROM sessions WHERE id = ?", (session_id,)).fetchone()
    if not session:
        raise HTTPException(404, "Session not found")
    if not session["transcript_path"]:
        raise HTTPException(400, "Session hasn't been transcribed yet")

    cid = session["campaign_id"] or "default"
    settings = merge_campaign_settings_with_env(db.get_campaign_settings(cid))
    speaker_map = {r["raw_label"]: r["display_name"] for r in
                   db.get_conn().execute("SELECT raw_label, display_name FROM speakers WHERE session_id = ?", (session_id,))
                   if r["display_name"]}

    # Per-request style overrides the campaign setting
    style = body.get("player_recap_style") or settings.get("player_recap_style") or "story"
    custom = body.get("player_recap_custom_prompt") or settings.get("player_recap_custom_prompt") or ""

    job_id = db.create_job(session_id, "summarize")

    def run(progress_cb):
        turns = load_turns(Path(session["transcript_path"]), speaker_map)
        dm_notes, player_recap, used_template = summarize_session(
            turns, settings, progress_cb=progress_cb,
            player_recap_style=style,
            player_recap_custom_prompt=custom,
        )
        with db.tx() as conn:
            conn.execute(
                "INSERT INTO notes (session_id, dm_notes, player_recap, player_recap_prompt, generated_at) VALUES (?, ?, ?, ?, ?) "
                "ON CONFLICT(session_id) DO UPDATE SET dm_notes=excluded.dm_notes, "
                "player_recap=excluded.player_recap, player_recap_prompt=excluded.player_recap_prompt, generated_at=excluded.generated_at",
                (session_id, dm_notes, player_recap, used_template, db.now()),
            )
            conn.execute("UPDATE sessions SET status = 'complete' WHERE id = ?", (session_id,))

    jobs.submit(job_id, run)
    return {"job_id": job_id}


@router.get("")
def get_notes(session_id: str):
    row = db.get_conn().execute("SELECT * FROM notes WHERE session_id = ?", (session_id,)).fetchone()
    if not row:
        raise HTTPException(404, "Notes not generated yet")
    return dict(row)