from engine.engine_components.tp_config import load_tp_config_for_con, resolve_tp_for_lecture
from engine.engine_components.course_config import load_course_config
from engine.engine_components.engine_state import get_last_processed_read_id, update_last_processed_read_id
from engine.engine_components.lectures import get_new_lectures
from engine.engine_components.classement import get_classement_by_tag
from engine.engine_components.detail_writer import insert_detail_record
from engine.logger import log_info, log_debug
from datetime import datetime, timezone
from zoneinfo import ZoneInfo
from decimal import Decimal
from engine.utils import format_temps_decimal
LOCAL_TZ = ZoneInfo("America/Toronto")
_last_valid_read = {}   # (tp_id, dossard) -> datetime locale


def ts_to_utc(ts):
    ts = Decimal(str(ts))
    seconds = int(ts)
    micro = int((ts - Decimal(seconds)) * Decimal(1_000_000))

    return datetime.fromtimestamp(seconds, tz=timezone.utc).replace(microsecond=micro)



def _normalize_course_time(dt):
    if dt is None:
        return None, None
    dt_utc = dt.replace(tzinfo=timezone.utc)
    dt_local = dt_utc.astimezone(LOCAL_TZ)
    return dt_local, dt_utc



def process_course(cur, cnx, con_id: int):

    tp_config = load_tp_config_for_con(cur, con_id)
    course_cfg = load_course_config(cur, con_id)

    raw_start = course_cfg["start_time"]
    raw_end   = course_cfg["end_time"]

    start_local, start_utc = _normalize_course_time(raw_start)
    end_local,   end_utc   = _normalize_course_time(raw_end)

    engine_table     = f"resultv2_{con_id}_lecture"
    classement_table = f"resultv2_{con_id}_classement"

    # last_processed
    last_processed = get_last_processed_read_id(cur, engine_table)
    if last_processed is None:
        last_processed = 0

    log_info(f"[STATE] con_id={con_id} last_processed={last_processed}")

    lectures = get_new_lectures(cur, last_processed)
    log_info(f"[NEW LECTURES] con_id={con_id} count={len(lectures)}")

    if not lectures:
        return

    max_id = last_processed

    for lec in lectures:

        rcourse_id = int(lec["rcourse_id"])
        chr_loc    = lec["chrinfo_location"]
        timestamp = Decimal(lec["chrinfo_time"])
        max_id = max(max_id, rcourse_id)

        dt_utc = ts_to_utc(timestamp)
        dt_local = dt_utc.astimezone(LOCAL_TZ)

        log_debug(f"[READ] id={rcourse_id} utc={dt_utc} loc={chr_loc}")

        # 1) start/end
        if start_utc and dt_utc < start_utc:
          log_debug(f"[REJECT START] id={rcourse_id} dt_utc={dt_utc} < start_utc={start_utc}")
          continue

        if end_utc and dt_utc > end_utc:
           log_debug(f"[REJECT END] id={rcourse_id} dt_utc={dt_utc} > end_utc={end_utc}")
           continue

        status = 1
        reason_code = None
        reason_ref_id = None

        # 2) coureur (BIB doit exister dans le classement)
        tag = lec["chrinfo_tag"]
        coureur = get_classement_by_tag(cur, classement_table, tag)

        if not coureur:
            # IMPORTANT : on ignore complètement
            continue

        dossard = coureur["cla_info_dossard"]

        # 3) TP obligatoire
        tp_info = resolve_tp_for_lecture(tp_config, con_id, chr_loc)
        if not tp_info:
            continue

        tp_id = tp_info["tp_id"]
        tp_name = tp_info["tp_name"]
        prio = tp_info["priority"]
        controller = tp_info["controller_name"]
        det_id = tp_info["det_id"]

        # 4) interval rule
        interval_cfg = (
            tp_config[tp_id]["config"]
            .get("config_tp_interval", {})
            .get("clef_temp_minimum_read_entre", [])
        )

        interval_sec = 0
        if interval_cfg:
            try:
                interval_sec = int(interval_cfg[0]["value1"])
            except:
                interval_sec = 0

        last_dt = _last_valid_read.get((tp_id, dossard))

        if last_dt and interval_sec > 0:
            delta = (dt_local - last_dt).total_seconds()
            if delta < interval_sec:
                status = 0
                reason_code = "SKIP_INTERVAL"
                reason_ref_id = det_id
                log_debug(f"[SKIP INTERVAL] id={rcourse_id} {delta:.1f}s < {interval_sec}s")

        # 5) INSERT

        detail_table = f"resultv2_{con_id}_detail"

        # 5) tours + tempstour
        tour, prev_ts = compute_tour(cur, detail_table, tp_id, dossard)

        if prev_ts is None:
            tempstour = Decimal("0")
        else:
            tempstour = timestamp - prev_ts

        tempstour_str = format_temps_decimal(tempstour)

        insert_detail_record(
            cur, cnx, con_id,
            dossard, lec,
            tp_id, tp_name,
            chr_loc, prio, controller,
            dt_local,
            status=status,
            reason_code=reason_code,
            reason_ref_id=reason_ref_id,
            tour=tour,
            tempstour=tempstour,
            tempstour_str=tempstour_str
        )


           


        # Mise à jour du dernier read VALIDE
        if status == 1:
            _last_valid_read[(tp_id, dossard)] = dt_local
            log_info(f"[OK] id={rcourse_id} tag={tag} dossard={dossard} tp={tp_name} prio={prio}")

    update_last_processed_read_id(cur, cnx, engine_table, max_id)

def compute_tour(cur, detail_table, tp_id, dossard):
    """
    Retourne (tour, prev_timestamp_decimal)
    - tour = dernier_tour + 1
    - prev_timestamp_decimal = timestamp_read du tour précédent (Decimal) ou None si premier tour
    """
    cur.execute(f"""
        SELECT tour, timestamp_read
        FROM `{detail_table}`
        WHERE tp_id = %s
          AND cla_info_dossard = %s
          AND status = 1
        ORDER BY detail_id DESC
        LIMIT 1
    """, (tp_id, dossard))

    row = cur.fetchone()

    # Première lecture → tour 1, pas de temps précédent
    if not row or row["tour"] is None:
        return 1, None

    last_tour = row["tour"]
    prev_ts = Decimal(str(row["timestamp_read"]))

    return last_tour + 1, prev_ts