"""City payload builders for API-facing response shapes."""

from __future__ import annotations

from typing import Any, Dict, Optional, List
from datetime import datetime, timezone
import re

from web.core import _is_excluded_model_name

TURKISH_MGM_CITIES = {"ankara", "istanbul"}

def build_city_summary_payload(data: Dict[str, Any]) -> Dict[str, Any]:
    deb = data.get("deb") if isinstance(data.get("deb"), dict) else {}
    return {
        "name": data.get("name"),
        "display_name": data.get("display_name"),
        "icao": data.get("risk", {}).get("icao"),
        "utc_offset_seconds": data.get("utc_offset_seconds"),
        "local_time": data.get("local_time"),
        "temp_symbol": data.get("temp_symbol"),
        "current": {
            "temp": data.get("current", {}).get("temp"),
            "obs_time": data.get("current", {}).get("obs_time"),
            "settlement_source": data.get("current", {}).get("settlement_source"),
            "settlement_source_label": data.get("current", {}).get(
                "settlement_source_label"
            ),
        },
        "deb": dict(deb) if deb else {"prediction": None},
        "wunderground_current": data.get("wunderground_current") or {},
        "deviation_monitor": data.get("deviation_monitor") or {},
        "risk": {
            "level": data.get("risk", {}).get("level"),
            "warning": data.get("risk", {}).get("warning"),
        },
        "updated_at": data.get("updated_at"),
    }


def _parse_time_val(val: str) -> Optional[datetime]:
    if not val:
        return None
    try:
        val = str(val).strip().replace("Z", "+00:00")
        if "T" in val:
            return datetime.fromisoformat(val)
        else:
            return datetime.fromisoformat(val)
    except Exception:
        try:
            val_clean = re.sub(r'\.\d+', '', val)
            return datetime.strptime(val_clean, "%Y-%m-%d %H:%M:%S")
        except Exception:
            return None


def aggregate_runway_history(raw_history: Dict[str, List[Dict[str, Any]]], resolution: str) -> Dict[str, List[Dict[str, Any]]]:
    if not raw_history:
        return {}
    if not resolution or resolution == "1m":
        return raw_history
    
    try:
        if resolution.endswith("m"):
            minutes = int(resolution[:-1])
        elif resolution.endswith("h"):
            minutes = int(resolution[:-1]) * 60
        else:
            minutes = 10
    except Exception:
        minutes = 10
        
    seconds = minutes * 60
    aggregated = {}
    for rwy, points in raw_history.items():
        if not points:
            continue
        
        buckets = {}
        for pt in points:
            t_str = pt.get("time") or pt.get("timestamp")
            temp = pt.get("temp") or pt.get("temp_c") or pt.get("value")
            if temp is None or not isinstance(t_str, str):
                continue
            dt = _parse_time_val(t_str)
            if not dt:
                continue
                
            ts = int(dt.timestamp())
            bucket_ts = (ts // seconds) * seconds
            
            if bucket_ts not in buckets:
                buckets[bucket_ts] = []
            buckets[bucket_ts].append(temp)
            
        bucket_points = []
        for bucket_ts in sorted(buckets.keys()):
            temps = buckets[bucket_ts]
            close_temp = temps[-1]
            bucket_dt = datetime.fromtimestamp(bucket_ts, tz=timezone.utc)
            bucket_points.append({
                "time": bucket_dt.isoformat(),
                "temp": round(close_temp, 1)
            })
        aggregated[rwy] = bucket_points
        
    return aggregated


def build_runway_band_history(raw_history: Dict[str, List[Dict[str, Any]]], resolution: str) -> List[Dict[str, Any]]:
    if not raw_history:
        return []
    
    try:
        if resolution.endswith("m"):
            minutes = int(resolution[:-1])
        elif resolution.endswith("h"):
            minutes = int(resolution[:-1]) * 60
        else:
            minutes = 10
    except Exception:
        minutes = 10
        
    seconds = minutes * 60
    buckets = {}
    for rwy, points in raw_history.items():
        for pt in points:
            t_str = pt.get("time") or pt.get("timestamp")
            temp = pt.get("temp") or pt.get("temp_c") or pt.get("value")
            if temp is None or not isinstance(t_str, str):
                continue
            dt = _parse_time_val(t_str)
            if not dt:
                continue
                
            ts = int(dt.timestamp())
            bucket_ts = (ts // seconds) * seconds
            
            if bucket_ts not in buckets:
                buckets[bucket_ts] = []
            buckets[bucket_ts].append(temp)
            
    band_history = []
    for bucket_ts in sorted(buckets.keys()):
        temps = buckets[bucket_ts]
        if not temps:
            continue
        high_temp = max(temps)
        low_temp = min(temps)
        avg_temp = sum(temps) / len(temps)
        
        bucket_dt = datetime.fromtimestamp(bucket_ts, tz=timezone.utc)
        band_history.append({
            "time": bucket_dt.isoformat(),
            "high_temp": round(high_temp, 1),
            "low_temp": round(low_temp, 1),
            "avg_temp": round(avg_temp, 1),
        })
        
    return band_history


def build_city_detail_payload(
    data: Dict[str, Any],
    market_slug: Optional[str] = None,
    target_date: Optional[str] = None,
    resolution: Optional[str] = "10m",
) -> Dict[str, Any]:
    return {
        "city": data.get("name"),
        "fetched_at": data.get("updated_at"),
        "overview": {
            "name": data.get("name"),
            "display_name": data.get("display_name"),
            "icao": data.get("risk", {}).get("icao"),
            "airport": data.get("risk", {}).get("airport"),
            "lat": data.get("lat"),
            "lon": data.get("lon"),
            "local_time": data.get("local_time"),
            "local_date": data.get("local_date"),
            "temp_symbol": data.get("temp_symbol"),
            "current_temp": data.get("current", {}).get("temp"),
            "settlement_source": data.get("current", {}).get("settlement_source"),
            "settlement_source_label": data.get("current", {}).get(
                "settlement_source_label"
            ),
            "settlement_station": data.get("settlement_station") or {},
            "deb_prediction": data.get("deb", {}).get("prediction"),
            "risk_level": data.get("risk", {}).get("level"),
            "risk_warning": data.get("risk", {}).get("warning"),
            "updated_at": data.get("updated_at"),
        },
        "official": {
            "available": bool(data.get("current", {}).get("temp") is not None),
            "metar": {
                "observation_time": data.get("airport_current", {}).get("obs_time"),
                "obs_age_min": data.get("airport_current", {}).get("obs_age_min"),
                "report_time": data.get("airport_current", {}).get("report_time"),
                "receipt_time": data.get("airport_current", {}).get("receipt_time"),
                "raw_metar": data.get("airport_current", {}).get("raw_metar"),
                "current": data.get("airport_current") or {},
            },
            "taf": data.get("taf") or {},
            "weather_gov": {},
            "mgm": data.get("mgm") or {},
            "mgm_nearby": data.get("mgm_nearby") or [],
            "nearby_source": data.get("nearby_source")
            or (
                "mgm"
                if str(data.get("name") or "").lower() in TURKISH_MGM_CITIES
                else "metar_cluster"
            ),
            "airport_primary": data.get("airport_primary") or {},
            "airport_primary_today_obs": data.get("airport_primary_today_obs") or [],
            "wunderground_current": data.get("wunderground_current") or {},
            "official_nearby": data.get("official_nearby") or [],
            "official_network_source": data.get("official_network_source"),
            "official_network_status": data.get("official_network_status") or {},
            "network_lead_signal": data.get("network_lead_signal") or {},
            "network_spread_signal": data.get("network_spread_signal") or {},
            "center_station_candidate": data.get("center_station_candidate"),
            "airport_vs_network_delta": data.get("airport_vs_network_delta"),
        },
        "timeseries": {
            "metar_recent_obs": data.get("metar_recent_obs") or [],
            "metar_today_obs": data.get("metar_today_obs") or [],
            "settlement_today_obs": data.get("settlement_today_obs") or [],
            "wunderground_today_obs": (data.get("wunderground_current") or {}).get("today_obs") or [],
            "hourly": data.get("hourly") or {},
            "mgm_hourly": (data.get("mgm") or {}).get("hourly", []),
            "forecast_daily": (data.get("forecast") or {}).get("daily", []),
        },
        "models": {
            k: v
            for k, v in (data.get("multi_model") or {}).items()
            if not _is_excluded_model_name(k)
        },
        "models_hourly": {
            "times": (data.get("multi_model") or {}).get("hourly_times", []),
            "curves": {
                model: values
                for model, values in (
                    (data.get("multi_model") or {}).get("hourly_forecasts", {})
                ).items()
                if not _is_excluded_model_name(model)
            },
        },
        "deb": data.get("deb") or {},
        "multi_model_daily": data.get("multi_model_daily") or {},
        "probabilities": data.get("probabilities") or {"mu": None, "distribution": []},
        "dynamic_commentary": data.get("dynamic_commentary")
        or {"summary": "", "notes": []},
        "intraday_meteorology": data.get("intraday_meteorology")
        or _build_intraday_meteorology(data),
        "vertical_profile_signal": data.get("vertical_profile_signal") or {},
        "taf": data.get("taf") or {},
        "runway_plate_history": aggregate_runway_history(data.get("runway_plate_history") or {}, resolution or "10m"),
        "runway_band_history": build_runway_band_history(data.get("runway_plate_history") or {}, resolution or "10m"),

        "risk": data.get("risk"),
        "settlement_station": data.get("settlement_station") or {},
        "airport_primary": data.get("airport_primary") or {},
        "official_nearby": data.get("official_nearby") or [],
        "official_network_source": data.get("official_network_source"),
        "official_network_status": data.get("official_network_status") or {},
        "network_lead_signal": data.get("network_lead_signal") or {},
        "network_spread_signal": data.get("network_spread_signal") or {},
        "center_station_candidate": data.get("center_station_candidate"),
        "airport_vs_network_delta": data.get("airport_vs_network_delta"),
        "airport_current": data.get("airport_current") or {},
        "wunderground_current": data.get("wunderground_current") or {},
        "amos": data.get("amos") or {},
        "nearby_source": data.get("nearby_source")
        or (
            "mgm"
            if str(data.get("name") or "").lower() in TURKISH_MGM_CITIES
            else "metar_cluster"
        ),
        "ai_analysis": data.get("ai_analysis") or "",
        "errors": {},
    }


def _build_intraday_meteorology(data: Dict[str, Any]) -> Dict[str, Any]:
    from web.analysis_service import _build_intraday_meteorology as build_intraday

    return build_intraday(data)