"""
Health data service: read endpoints + upsert helpers used by the Garmin sync.

Mirrors the original Node HealthService, including the camelCase JSON mapping.
Upserts use backend-specific SQL because SQLite does not support
`ON DUPLICATE KEY UPDATE` (it uses `ON CONFLICT ... DO UPDATE`).
"""
import uuid

from db import execute, query_one, query_all
from config import DB_TYPE


def _range_sql(user_id, start=None, end=None):
    params = [user_id]
    sql = "WHERE user_id = ?"
    if start:
        sql += " AND date >= ?"
        params.append(start)
    if end:
        sql += " AND date <= ?"
        params.append(end)
    return sql, params


def get_summary(user_id, start=None, end=None):
    sql, params = _range_sql(user_id, start, end)
    rows = query_all(
        "SELECT date, steps, heart_rate, heart_rate_variability, "
        "sleep_duration, sleep_quality, stress, calories_burned "
        f"FROM health_data {sql} ORDER BY date ASC",
        params,
    )
    return [
        {
            "date": r["date"],
            "steps": r["steps"],
            "heartRate": r["heart_rate"],
            "heartRateVariability": r["heart_rate_variability"],
            "sleep": (
                {"duration": r["sleep_duration"], "quality": r["sleep_quality"]}
                if r["sleep_duration"] is not None
                else None
            ),
            "stress": r["stress"],
            "caloriesBurned": r["calories_burned"],
        }
        for r in rows
    ]


def get_steps(user_id, start=None, end=None):
    sql, params = _range_sql(user_id, start, end)
    rows = query_all(
        f"SELECT date, steps FROM health_data {sql} AND steps IS NOT NULL ORDER BY date ASC",
        params,
    )
    return [{"date": r["date"], "steps": r["steps"]} for r in rows]


def get_heart_rate(user_id, start=None, end=None):
    sql, params = _range_sql(user_id, start, end)
    rows = query_all(
        f"SELECT date, heart_rate, heart_rate_variability FROM health_data {sql} "
        "AND heart_rate IS NOT NULL ORDER BY date ASC",
        params,
    )
    return [
        {
            "date": r["date"],
            "heartRate": r["heart_rate"],
            "heartRateVariability": r["heart_rate_variability"],
        }
        for r in rows
    ]


def get_sleep(user_id, start=None, end=None):
    sql, params = _range_sql(user_id, start, end)
    rows = query_all(
        f"SELECT date, sleep_duration, sleep_quality FROM health_data {sql} "
        "AND sleep_duration IS NOT NULL ORDER BY date ASC",
        params,
    )
    return [
        {"date": r["date"], "duration": r["sleep_duration"], "quality": r["sleep_quality"]}
        for r in rows
    ]


def get_activities(user_id, start=None, end=None):
    sql, params = _range_sql(user_id, start, end)
    rows = query_all(
        "SELECT id, activity_type, start_time, end_time, duration, distance, "
        "calories, heart_rate_average, heart_rate_max "
        f"FROM activities {sql} ORDER BY start_time DESC",
        params,
    )
    return rows


def upsert_health_daily(user_id, record):
    hid = f"{user_id}-{record['date']}"
    cols = [
        "id", "user_id", "date", "steps", "heart_rate",
        "heart_rate_variability", "blood_pressure_systolic",
        "blood_pressure_diastolic", "sleep_duration", "sleep_quality",
        "stress", "calories_burned",
    ]
    placeholders = ", ".join(["?"] * len(cols))
    vals = [
        hid, user_id, record.get("date"), record.get("steps"),
        record.get("heartRate"), record.get("heartRateVariability"),
        record.get("bloodPressureSystolic"), record.get("bloodPressureDiastolic"),
        record.get("sleepDuration"), record.get("sleepQuality"),
        record.get("stress"), record.get("caloriesBurned"),
    ]
    if DB_TYPE == "mariadb":
        update_cols = [c for c in cols if c not in ("id", "user_id")]
        updates = ", ".join([f"{c}=VALUES({c})" for c in update_cols])
        sql = (
            f"INSERT INTO health_data ({', '.join(cols)}) VALUES ({placeholders}) "
            f"ON DUPLICATE KEY UPDATE {updates}, updated_at=CURRENT_TIMESTAMP"
        )
    else:
        update_cols = [c for c in cols if c not in ("id", "user_id")]
        updates = ", ".join([f"{c}=excluded.{c}" for c in update_cols])
        sql = (
            f"INSERT INTO health_data ({', '.join(cols)}) VALUES ({placeholders}) "
            f"ON CONFLICT(user_id, date) DO UPDATE SET {updates}, updated_at=CURRENT_TIMESTAMP"
        )
    execute(sql, vals)
    return hid


def insert_activity(user_id, activity):
    aid = str(uuid.uuid4())
    cols = [
        "id", "user_id", "activity_type", "start_time", "end_time",
        "duration", "distance", "calories", "heart_rate_average", "heart_rate_max",
    ]
    placeholders = ", ".join(["?"] * len(cols))
    vals = [
        aid, user_id, activity.get("activityType"), activity.get("startTime"),
        activity.get("endTime"), activity.get("duration"), activity.get("distance"),
        activity.get("calories"), activity.get("heartRateAverage"),
        activity.get("heartRateMax"),
    ]
    execute(
        f"INSERT INTO activities ({', '.join(cols)}) VALUES ({placeholders})",
        vals,
    )
    return aid