"""
Skriv og query passeringslogg i SQLite.

Deduplisering:
  Bilder av samme utøver (bib) ved samme stasjon innen DEDUP_WINDOW_SECONDS
  grupperes under én passering. Alle bilder bevares i passage_images.
  Passeringstidsstempel = siste bilde i burst-sekvensen (nyeste timestamp).
"""

import uuid
from datetime import datetime, timedelta
from typing import Optional

import aiosqlite

DEDUP_WINDOW_SECONDS = 2


async def _find_active_passage(
    db: aiosqlite.Connection,
    bib_number: str,
    station: str,
    timestamp_utc: datetime,
) -> Optional[dict]:
    """
    Finn eksisterende passering med samme bib og stasjon der nytt bilde faller
    innen DEDUP_WINDOW_SECONDS etter siste registrerte bilde i passeringen.
    """
    async with db.execute(
        """
        SELECT p.passage_id, MAX(pi.timestamp_utc) AS last_image_ts
        FROM passages p
        JOIN passage_images pi ON pi.passage_id = p.passage_id
        WHERE p.bib_number = ? AND p.station = ?
        GROUP BY p.passage_id
        HAVING last_image_ts >= ?
        ORDER BY last_image_ts DESC
        LIMIT 1
        """,
        (
            bib_number,
            station,
            (timestamp_utc - timedelta(seconds=DEDUP_WINDOW_SECONDS)).isoformat(),
        ),
    ) as cur:
        row = await cur.fetchone()
    return dict(row) if row else None


async def log_passage(
    db: aiosqlite.Connection,
    *,
    race_id: Optional[str] = None,
    profile_id: Optional[str],
    bib_number: Optional[str],
    station: str,
    timestamp_utc: datetime,
    gps_lat: float,
    gps_lon: float,
    gps_alt: Optional[float],
    confidence: float,
    proximity_score: float = 0.0,
    id_method: str,
    source_image: str,
    needs_review: bool = False,
    review_note: Optional[str] = None,
) -> str:
    """
    Logg ett bilde som en passering.

    - Er bildet del av en pågående burst (bib+stasjon innen vinduet)?
      → Legg til i passage_images, oppdater passeringstidsstempel til dette
        bildet (siste i tid = offisiell passeringstid).
    - Nytt bib/stasjon eller utenfor vinduet?
      → Opprett ny passering.

    Returnerer passage_id.
    """
    image_id = str(uuid.uuid4())

    if bib_number:
        existing = await _find_active_passage(db, bib_number, station, timestamp_utc)
        if existing:
            passage_id = existing["passage_id"]
            # Legg til bilde i sekvensen
            await db.execute(
                """
                INSERT INTO passage_images (image_id, passage_id, image_path, timestamp_utc, proximity_score)
                VALUES (?, ?, ?, ?, ?)
                """,
                (image_id, passage_id, source_image, timestamp_utc.isoformat(), proximity_score),
            )
            # Oppdater passeringen med siste bilde som offisiell tid og bildesti
            await db.execute(
                """
                UPDATE passages
                SET timestamp_utc = ?, source_image = ?, confidence = ?, id_method = ?
                WHERE passage_id = ?
                """,
                (
                    timestamp_utc.isoformat(),
                    source_image,
                    confidence,
                    id_method,
                    passage_id,
                ),
            )
            await db.commit()
            return passage_id

    # Ny passering
    passage_id = str(uuid.uuid4())
    await db.execute(
        """
        INSERT INTO passages (
            passage_id, race_id, profile_id, bib_number, station,
            timestamp_utc, gps_lat, gps_lon, gps_alt,
            confidence, id_method, source_image,
            needs_review, review_note
        ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
        """,
        (
            passage_id, race_id, profile_id, bib_number, station,
            timestamp_utc.isoformat(), gps_lat, gps_lon, gps_alt,
            confidence, id_method, source_image,
            int(needs_review), review_note,
        ),
    )
    await db.execute(
        """
        INSERT INTO passage_images (image_id, passage_id, image_path, timestamp_utc, proximity_score)
        VALUES (?, ?, ?, ?, ?)
        """,
        (image_id, passage_id, source_image, timestamp_utc.isoformat(), proximity_score),
    )
    await db.commit()
    return passage_id


async def get_passage_images(db: aiosqlite.Connection, passage_id: str) -> list[dict]:
    """Hent alle bilder for en passering, kronologisk sortert."""
    async with db.execute(
        """
        SELECT image_id, image_path, timestamp_utc, proximity_score
        FROM passage_images
        WHERE passage_id = ?
        ORDER BY timestamp_utc
        """,
        (passage_id,),
    ) as cur:
        rows = await cur.fetchall()
    return [dict(r) for r in rows]


async def get_passages(
    db: aiosqlite.Connection,
    race_id: Optional[str] = None,
    profile_id: Optional[str] = None,
    station: Optional[str] = None,
    needs_review: Optional[bool] = None,
) -> list[dict]:
    clauses = []
    params = []
    if race_id is not None:
        clauses.append("p.race_id = ?")
        params.append(race_id)
    if profile_id is not None:
        clauses.append("p.profile_id = ?")
        params.append(profile_id)
    if station is not None:
        clauses.append("p.station = ?")
        params.append(station)
    if needs_review is not None:
        clauses.append("p.needs_review = ?")
        params.append(int(needs_review))

    where = ("WHERE " + " AND ".join(clauses)) if clauses else ""
    query = f"""
        SELECT p.*, a.name, a.club
        FROM passages p
        LEFT JOIN athletes a ON a.profile_id = p.profile_id
        {where}
        ORDER BY p.timestamp_utc
    """
    async with db.execute(query, params) as cur:
        rows = await cur.fetchall()
    return [dict(r) for r in rows]


async def resolve_passage(
    db: aiosqlite.Connection,
    passage_id: str,
    profile_id: Optional[str],
    bib_number: Optional[str],
    review_note: Optional[str] = None,
) -> bool:
    cur = await db.execute(
        """
        UPDATE passages
        SET profile_id = ?, bib_number = ?, needs_review = 0,
            review_note = ?, id_method = 'manual'
        WHERE passage_id = ?
        """,
        (profile_id, bib_number, review_note, passage_id),
    )
    await db.commit()
    return cur.rowcount > 0


async def delete_passage(db: aiosqlite.Connection, passage_id: str) -> bool:
    cur = await db.execute("DELETE FROM passages WHERE passage_id = ?", (passage_id,))
    await db.commit()
    return cur.rowcount > 0