from __future__ import annotations

from datetime import date

from plant.gdd import predict_harvest_from_forecasts


def _harvest_language(prediction: dict, plant_name: str, ai_bundle: dict | None = None) -> str:
    ai_bundle = ai_bundle or {}
    ai_payload = ai_bundle.get("harvestPredictionCard", {}) if isinstance(ai_bundle, dict) else {}
    description = ai_payload.get("description")
    if isinstance(description, str) and description.strip():
        return description.strip()

    return (
        f"برای {plant_name}، رشد تجمعی بر اساس مدل GDD محاسبه شده است. "
        f"تا امروز {prediction['current_cumulative_gdd']} واحد-روز رشد ثبت شده و "
        f"برای رسیدن به بلوغ حدود {prediction['remaining_gdd']} واحد-روز دیگر نیاز است."
    )


def build_harvest_prediction_card(sensor_id: str, context: dict | None = None, ai_bundle: dict | None = None) -> dict:
    context = context or {}
    forecasts = context.get("forecasts", [])
    plants = context.get("plants", [])

    plant = plants[0] if plants else None
    plant_name = plant.name if plant else "محصول"
    prediction = predict_harvest_from_forecasts(forecasts=forecasts, plant=plant).__dict__
    target_date = date.fromisoformat(prediction["predicted_harvest_date"])
    window_start = date.fromisoformat(prediction["predicted_harvest_window"]["start"])
    window_end = date.fromisoformat(prediction["predicted_harvest_window"]["end"])

    return {
        "date": prediction["predicted_harvest_date"],
        "dateFormatted": f"{target_date.day} {target_date.strftime('%B')} {target_date.year}",
        "daysUntil": prediction["estimated_days_to_harvest"],
        "description": _harvest_language(prediction, plant_name=plant_name, ai_bundle=ai_bundle),
        "optimalWindowStart": window_start.isoformat(),
        "optimalWindowEnd": window_end.isoformat(),
        "gddDetails": prediction,
    }