"""Primary LoraTester server: REST API + web UI."""

import time
from pathlib import Path

from flask import Flask, jsonify, request, send_from_directory
from flask_cors import CORS

from core.auth import ANDROID_CLIENT_HEADER, is_android_client
from core.config import HOST, PORT
from core.models import ChatIn, TelemetryIn
from core import storage
from core.telemetry_body import telemetry_from_body

STATIC_DIR = Path(__file__).resolve().parent / "static"

app = Flask(__name__, static_folder=str(STATIC_DIR), static_url_path="/static")
CORS(app)

storage.init_db()


@app.route("/")
def index():
    resp = send_from_directory(STATIC_DIR, "index.html")
    resp.headers["Cache-Control"] = "no-store"
    return resp


@app.post("/api/telemetry")
def post_telemetry():
    if not is_android_client(request.headers):
        return jsonify({
            "error": "telemetry only from Android app",
            "hint": f"send header {ANDROID_CLIENT_HEADER}: android",
        }), 403
    body = request.get_json(force=True, silent=True) or {}
    device_id = body.get("device_id")
    if not device_id:
        return jsonify({"error": "device_id required"}), 400
    try:
        data = telemetry_from_body({**body, "device_id": device_id})
        return jsonify(storage.record_telemetry(data))
    except ValueError as e:
        return jsonify({"error": str(e)}), 400


@app.get("/api/devices")
def get_devices():
    return jsonify(storage.list_devices())


@app.get("/api/telemetry")
def get_telemetry_history():
    device_id = request.args.get("device_id")
    limit = int(request.args.get("limit", 100))
    since = _float_or_none(request.args.get("since"))
    until = _float_or_none(request.args.get("until"))
    role = request.args.get("role")
    return jsonify(storage.get_telemetry(device_id, limit, since, until, role))


@app.get("/api/stats/history")
def get_stats_history():
    device_id = request.args.get("device_id")
    if not device_id:
        return jsonify({"error": "device_id required"}), 400
    limit = int(request.args.get("limit", 50))
    since = _float_or_none(request.args.get("since"))
    until = _float_or_none(request.args.get("until"))
    role = request.args.get("role")
    return jsonify(storage.get_telemetry(device_id, limit, since, until, role))


@app.post("/api/tracks/start")
def tracks_start():
    if not is_android_client(request.headers):
        return jsonify({"error": "Android only"}), 403
    body = request.get_json(force=True, silent=True) or {}
    device_id = body.get("device_id")
    if not device_id:
        return jsonify({"error": "device_id required"}), 400
    try:
        return jsonify(storage.start_track(str(device_id), body.get("label")))
    except ValueError as e:
        return jsonify({"error": str(e)}), 400


@app.post("/api/tracks/<int:track_id>/points")
def tracks_points(track_id: int):
    if not is_android_client(request.headers):
        return jsonify({"error": "Android only"}), 403
    body = request.get_json(force=True, silent=True) or {}
    points = body.get("points") or []
    try:
        return jsonify(storage.add_track_points(track_id, points))
    except ValueError as e:
        return jsonify({"error": str(e)}), 400


@app.post("/api/tracks/<int:track_id>/finish")
def tracks_finish(track_id: int):
    if not is_android_client(request.headers):
        return jsonify({"error": "Android only"}), 403
    try:
        return jsonify(storage.finish_track(track_id))
    except ValueError as e:
        return jsonify({"error": str(e)}), 400


@app.get("/api/tracks")
def tracks_list():
    device_id = request.args.get("device_id")
    limit = int(request.args.get("limit", 50))
    return jsonify(storage.list_tracks(device_id, limit))


@app.get("/api/tracks/<int:track_id>")
def tracks_get(track_id: int):
    try:
        return jsonify(storage.get_track(track_id))
    except ValueError as e:
        return jsonify({"error": str(e)}), 404


@app.post("/api/chat")
def post_chat():
    body = request.get_json(force=True, silent=True) or {}
    device_id = body.get("device_id")
    text = (body.get("text") or "").strip()
    if not device_id or not text:
        return jsonify({"error": "device_id and text required"}), 400
    data = ChatIn(
        device_id=str(device_id),
        text=text,
        ts=_float_or_none(body.get("ts")),
    )
    return jsonify(storage.add_chat(data))


@app.get("/api/chat")
def get_chat():
    since = float(request.args.get("since", 0))
    limit = int(request.args.get("limit", 200))
    return jsonify(storage.get_chat(since, limit))


@app.post("/api/commands")
def post_command():
    body = request.get_json(force=True, silent=True) or {}
    from_id = body.get("from_device_id")
    to_id = body.get("to_device_id")
    kind = body.get("kind")
    if not from_id or not to_id or not kind:
        return jsonify({"error": "from_device_id, to_device_id, kind required"}), 400
    try:
        return jsonify(
            storage.enqueue_command(
                str(from_id), str(to_id), str(kind), body.get("payload")
            )
        )
    except ValueError as e:
        return jsonify({"error": str(e)}), 400


@app.get("/api/commands/pending")
def commands_pending():
    if not is_android_client(request.headers):
        return jsonify({"error": "Android only"}), 403
    device_id = request.args.get("device_id")
    if not device_id:
        return jsonify({"error": "device_id required"}), 400
    limit = int(request.args.get("limit", 20))
    try:
        return jsonify(storage.poll_pending_commands(str(device_id), limit))
    except ValueError as e:
        return jsonify({"error": str(e)}), 400


@app.get("/api/commands")
def commands_list():
    to_device_id = request.args.get("to_device_id")
    limit = int(request.args.get("limit", 50))
    return jsonify(storage.list_commands(to_device_id, limit))


@app.post("/api/paired-tracks/start")
def paired_tracks_start():
    body = request.get_json(force=True, silent=True) or {}
    initiator = body.get("initiator") or (
        body.get("device_id") if is_android_client(request.headers) else storage.WEB_SENDER_ID
    )
    device_ids = body.get("device_ids")
    try:
        return jsonify(
            storage.start_paired_track(
                device_ids if isinstance(device_ids, list) else None,
                str(initiator),
            )
        )
    except ValueError as e:
        return jsonify({"error": str(e)}), 400


@app.get("/api/paired-tracks/active")
def paired_tracks_active():
    session = storage.get_active_paired_track()
    return jsonify({"active": session is not None, "session": session})


@app.post("/api/paired-tracks/ack")
def paired_tracks_ack():
    if not is_android_client(request.headers):
        return jsonify({"error": "Android only"}), 403
    body = request.get_json(force=True, silent=True) or {}
    session_id = body.get("session_id")
    device_id = body.get("device_id")
    track_id = body.get("track_id")
    if session_id is None or not device_id or track_id is None:
        return jsonify({"error": "session_id, device_id, track_id required"}), 400
    try:
        return jsonify(
            storage.ack_paired_track(int(session_id), str(device_id), int(track_id))
        )
    except ValueError as e:
        return jsonify({"error": str(e)}), 400


@app.post("/api/paired-tracks/cancel")
def paired_tracks_cancel():
    body = request.get_json(force=True, silent=True) or {}
    session_id = body.get("session_id")
    try:
        sid = int(session_id) if session_id is not None else None
        return jsonify(storage.cancel_paired_track(sid))
    except ValueError as e:
        return jsonify({"error": str(e)}), 400


@app.post("/api/elevation/profile")
def elevation_profile():
    from core.elevation import build_elevation_profile

    body = request.get_json(force=True, silent=True) or {}
    points = body.get("points") or []
    step_m = body.get("step_m", 10)
    try:
        step = float(step_m)
    except (TypeError, ValueError):
        step = 10.0
    return jsonify(build_elevation_profile(points, step))


@app.get("/api/tracks/<int:track_id>/elevation-profile")
def track_elevation_profile(track_id: int):
    from core.elevation import build_elevation_profile

    step_m = request.args.get("step_m", 10, type=float)
    try:
        track = storage.get_track(track_id)
    except ValueError as e:
        return jsonify({"error": str(e)}), 404
    points = track.get("points") or []
    return jsonify(build_elevation_profile(points, step_m or 10.0))


@app.get("/api/elevation/nearest-hill")
def elevation_nearest_hill():
    from core.elevation import find_nearest_hill

    lat = request.args.get("lat", type=float)
    lon = request.args.get("lon", type=float)
    if lat is None or lon is None:
        return jsonify({"ok": False, "error": "lat and lon required"}), 400
    radius_m = request.args.get("radius_m", 5000, type=float)
    step_m = request.args.get("step_m", 300, type=float)
    min_prominence_m = request.args.get("min_prominence_m", 8, type=float)
    return jsonify(find_nearest_hill(lat, lon, radius_m, step_m, min_prominence_m))


@app.get("/api/health")
def health():
    from core.elevation import elevation_status

    status = storage.db_status()
    return jsonify(
        {"ok": status["db_ok"], "ts": time.time(), **status, **elevation_status()}
    )


def _float_or_none(value):
    if value is None or value == "":
        return None
    try:
        return float(value)
    except (TypeError, ValueError):
        return None


if __name__ == "__main__":
    app.run(host=HOST, port=PORT, debug=True)