from dataclasses import dataclass, field
from typing import List, Dict

DEFAULT_LABELS: List[str] = [
    "scratch_dent","paint_damage","cracked_windshield","flat_tire","engine_leak",
    "brake_wear","headlight_fault","battery_corrosion","rust","bumper_damage"
]

SEVERITY_DEFAULTS: Dict[str, int] = {
    "scratch_dent": 2,
    "paint_damage": 2,
    "cracked_windshield": 4,
    "flat_tire": 3,
    "engine_leak": 5,
    "brake_wear": 4,
    "headlight_fault": 3,
    "battery_corrosion": 2,
    "rust": 2,
    "bumper_damage": 3,
}

# Predictive maintenance thresholds (km)
PM_THRESHOLDS = {
    "engine_oil": 10000,
    "brake_pads": 30000,
    "coolant": 40000,
    "battery_check": 25000,
    "tire_rotation": 8000,
}

@dataclass
class AppSettings:
    labels: List[str] = field(default_factory=lambda: DEFAULT_LABELS.copy())
    labor_rate_per_hour: float = 1200.0     # INR
    diagnostic_fee: float = 500.0           # INR