"""Business logic: compute worked hours and expected hours per day/week."""
from datetime import datetime, timedelta


def hhmm_to_minutes(val: str | None) -> int:
    if not val:
        return 0
    h, m = val.split(":")
    return int(h) * 60 + int(m)


def minutes_to_hhmm(minutes: int) -> str:
    sign = "-" if minutes < 0 else ""
    minutes = abs(minutes)
    return f"{sign}{minutes // 60}h{minutes % 60:02d}"


def heures_travaillees(p: dict) -> int:
    """Return worked minutes for a pointage row."""
    matin = max(0, hhmm_to_minutes(p["matin_sortie"]) - hhmm_to_minutes(p["matin_entree"]))
    aprem = max(0, hhmm_to_minutes(p["aprem_sortie"]) - hhmm_to_minutes(p["aprem_entree"]))
    # only count if entry AND exit are present
    if not (p["matin_entree"] and p["matin_sortie"]):
        matin = 0
    if not (p["aprem_entree"] and p["aprem_sortie"]):
        aprem = 0
    return matin + aprem


def heures_dues(date_str: str, conges: list[dict], heures_jour_min: int) -> int:
    """Return expected minutes for a date, accounting for vacations."""
    d = datetime.strptime(date_str, "%Y-%m-%d").date()
    # Weekend = no hours due
    if d.weekday() >= 5:
        return 0

    conges_date = {c["type"] for c in conges if c["date"] == date_str}

    if "jour" in conges_date:
        return 0
    if "matin" in conges_date and "aprem" in conges_date:
        return 0

    half = heures_jour_min // 2
    if "matin" in conges_date or "aprem" in conges_date:
        return half

    return heures_jour_min


def compute_week(pointages: list[dict], conges: list[dict], heures_jour_min: int) -> dict:
    """Compute totals for a list of pointages (one week)."""
    total_travaille = 0
    total_du = 0
    jours = []

    for p in pointages:
        travaille = heures_travaillees(p)
        du = heures_dues(p["date"], conges, heures_jour_min)
        delta = travaille - du
        total_travaille += travaille
        total_du += du
        jours.append({
            **p,
            "travaille_min": travaille,
            "du_min": du,
            "delta_min": delta,
            "travaille": minutes_to_hhmm(travaille),
            "du": minutes_to_hhmm(du),
            "delta": minutes_to_hhmm(delta),
            "conge": {c["type"] for c in conges if c["date"] == p["date"]},
        })

    return {
        "jours": jours,
        "total_travaille": minutes_to_hhmm(total_travaille),
        "total_du": minutes_to_hhmm(total_du),
        "solde": minutes_to_hhmm(total_travaille - total_du),
        "solde_min": total_travaille - total_du,
    }