rar-autopass/app/payload_view.py

"""Extragere payload submission -> campuri afisabile (US-003, PRD 3.5).

Helper PUR partajat intre canalul web (dashboard Trimiteri) si canalul API
(`GET /v1/prezentari`), ca extragerea sa NU diverge intre cele doua (decizie
eng review, DRY). Fara DB, fara request — primeste `payload_json` (text JSON
plaintext, vezi `submissions.payload_json`) sau un dict deja parsat.

Defensiv prin constructie: nu arunca niciodata pe payload malformat — degradeaza
la em-dash. Citeste cheile tolerant (canalele API si import pot diferi usor:
`nr_inmatriculare` vs `numar`/`numarInmatriculare`; coercion Excel pe odometru/VIN).
"""

from __future__ import annotations

import json
from typing import Any

EMPTY = "—"


def _clean_str(value: Any) -> str:
    """str() defensiv: None/'' -> '', altfel string strip-uit (coercion Excel safe)."""
    if value is None:
        return ""
    return str(value).strip()


def _clean_odometru(value: Any) -> str:
    """Odometru afisat curat: strip '.0' din coercion Excel (123456.0 -> 123456)."""
    s = _clean_str(value)
    if "." in s:
        before, after = s.split(".", 1)
        if after == "0" and before.lstrip("-").isdigit():
            return before
    return s


def _clean_cod_rar(value: Any) -> str:
    """Cod RAR afisat curat: uppercase + strip '.0' defensiv (coercion Excel 'OE-2.0' -> 'OE-2').

    Codurile RAR nu au zecimale, dar fii defensiv ca la odometru.
    """
    s = _clean_str(value)
    if s.endswith(".0"):
        s = s[:-2]
    return s.upper() if s else ""


def _vin_scurt(vin: str) -> str:
    """Forma trunchiata a VIN-ului pentru tabel (integral ramane in detaliu).

    VIN are 17 caractere; in tabel aratam ultimele 6 cu prefix elipsa ca sa
    incapa fara sa ascundem complet identitatea vehiculului.
    """
    if not vin:
        return ""
    if len(vin) <= 8:
        return vin
    return "…" + vin[-6:]


def _prima_prestatie(prestatii: Any) -> dict[str, Any]:
    """Primul item de prestatie ca dict, defensiv (lista goala/non-dict -> {})."""
    if isinstance(prestatii, list):
        for item in prestatii:
            if isinstance(item, dict):
                return item
    return {}


def _payload_dict(payload: str | dict | None) -> dict[str, Any]:
    """Normalizeaza intrarea la dict. JSON invalid / tip neasteptat -> {}."""
    if payload is None:
        return {}
    if isinstance(payload, dict):
        return payload
    if isinstance(payload, str):
        try:
            data = json.loads(payload)
        except (ValueError, TypeError):
            return {}
        return data if isinstance(data, dict) else {}
    return {}


def prezentare_din_payload(payload: str | dict | None) -> dict[str, str]:
    """Campuri afisabile dintr-un payload de submission.

    Intoarce un dict cu chei stabile (toate string-uri, EMPTY cand lipsesc):
      vehicul_nr, vin, vin_scurt, operatie, data_prestatie, odometru, cod.

    `operatie` = denumire prestatiei daca exista, altfel codul; `cod` = codul RAR
    (`cod_prestatie`) sau, in lipsa, codul intern (`cod_op_service`).
    """
    data = _payload_dict(payload)

    vin = _clean_str(data.get("vin"))
    nr = _clean_str(
        data.get("nr_inmatriculare")
        or data.get("numar")
        or data.get("numarInmatriculare")
    )
    odo = _clean_odometru(
        data.get("odometru_final")
        if data.get("odometru_final") is not None
        else data.get("odometru")
    )
    data_prest = _clean_str(data.get("data_prestatie") or data.get("dataPrestatie"))

    item = _prima_prestatie(data.get("prestatii"))
    cod = _clean_str(item.get("cod_prestatie") or item.get("cod_op_service"))
    denumire = _clean_str(item.get("denumire"))
    operatie = denumire or cod

    # cod_rar: exclusiv din cod_prestatie (NU fallback la cod_op_service); uppercase + strip ".0"
    cod_rar = _clean_cod_rar(item.get("cod_prestatie"))

    return {
        "vehicul_nr": nr or EMPTY,
        "vin": vin or EMPTY,
        "vin_scurt": _vin_scurt(vin) or EMPTY,
        "operatie": operatie or EMPTY,
        "data_prestatie": data_prest or EMPTY,
        "odometru": odo or EMPTY,
        "cod": cod or EMPTY,
        "cod_rar": cod_rar or EMPTY,
    }