from flask import Flask, render_template, make_response, json, jsonify, request, send_file, Response
from modules import app_gps, app_events, app_car, app_account, app_gps,app_obd, app_sql, app_dash, app_upload, app_video, app_health, app_alerts, app_settings, app_network
import os, time
from gevent.pywsgi import WSGIServer


app = Flask(__name__)
app_events.socketio.init_app(app)

account = app_account.Account()
obd = app_obd.start_obd()
car = app_car.Car()
gps = app_gps.start_gps()
app_sql.start_logging()
app_upload.start_uploading()
app_alerts.start_alerting()

@app.route('/')
def index():
    print("hello "+ account.name)
    print("you're car model is:" + car.model)
    return render_template('index.html', account = account, car = car)

@app.route('/dtc')
def dtc():
    return render_template('dtc.html', account = account, car = car)

@app.route('/dash')
def dash():
    return render_template('dash.html', account = account, car = car)

@app.route('/history')
def history():
    return render_template('history.html', account=account, car=car)

@app.route('/settings')
def settings():
    return render_template('settings.html', account=account, car=car)

@app.route('/api/settings', methods=['GET', 'POST'])
def api_settings():
    if request.method == 'GET':
        return jsonify(app_settings.get_settings())
    errors = app_settings.update_settings(request.get_json(silent=True))
    if errors:
        return jsonify(error="Invalid settings.", fields=errors), 400
    return jsonify(app_settings.get_settings())

@app.route('/api/uplink/status')
def uplink_status():
    try:
        return jsonify(app_network.get_status())
    except app_network.NetworkConfigurationError as error:
        return jsonify(error=str(error)), 503

@app.route('/api/uplink/config', methods=['POST', 'DELETE'])
def uplink_config():
    try:
        if request.method == 'DELETE':
            app_network.remove_phone_hotspot()
        else:
            body = request.get_json(silent=True)
            if not isinstance(body, dict):
                return jsonify(error="Expected a JSON object."), 400
            app_network.configure_phone_hotspot(
                body.get("ssid"),
                body.get("password"),
            )
        return jsonify(app_network.get_status())
    except app_network.NetworkConfigurationError as error:
        return jsonify(error=str(error)), 400

@app.route('/api/uplink/connect', methods=['POST'])
def uplink_connect():
    try:
        app_network.request_phone_connection()
    except app_network.NetworkConfigurationError as error:
        return jsonify(error=str(error)), 503
    return jsonify(status="connection_requested"), 202

@app.route('/api/trips')
def trips():
    return jsonify({"trips": app_sql.list_trips()})

@app.route('/api/trip/<int:trip_id>')
def trip_route(trip_id):
    trip = app_sql.get_trip_route(trip_id)
    if trip is None:
        return jsonify(error=f"Trip not found: {trip_id}"), 404
    return jsonify(trip)

@app.route('/api/dash/devices')
def dash_devices():
    devices = app_dash.list_usb_storage_partitions()
    return jsonify({"devices": devices})

@app.route('/api/dash/import', methods=['POST'])
def dash_import():
    body = request.get_json(silent=True)
    if body is None:
        relative_paths = None
    elif isinstance(body, dict):
        relative_paths = body.get("paths", [])
    else:
        relative_paths = []
    summary = app_dash.import_dashcam(relative_paths=relative_paths)
    status_code = (
        200
        if summary["status"] == "ok"
        else 400
        if summary["status"] == "invalid_selection"
        else 409
    )
    return jsonify(summary), status_code

@app.route('/api/dash/files')
def dash_files():
    summary = app_dash.list_dashcam_files()
    return jsonify(summary)

@app.route('/api/dash/files', methods=['DELETE'])
def dash_delete_all():
    summary = app_dash.delete_dashcam_files(delete_all=True)
    status_code = 200 if summary["status"] in {"ok", "partial"} else 409
    return jsonify(summary), status_code

@app.route('/api/dash/file', methods=['DELETE'])
def dash_delete_file():
    body = request.get_json(silent=True) or {}
    summary = app_dash.delete_dashcam_files(relative_path=body.get("path"))
    status_codes = {
        "ok": 200,
        "partial": 409,
        "invalid_path": 400,
        "not_found": 404,
    }
    return jsonify(summary), status_codes.get(summary["status"], 409)

@app.route('/api/local-videos')
def local_videos():
    return jsonify(app_video.list_local_videos())

@app.route('/api/local-video/file')
def local_video_file():
    relative_path = request.args.get("path", "")
    try:
        path = app_video.get_local_video_path(relative_path)
    except ValueError as error:
        return jsonify(error=str(error)), 400
    except FileNotFoundError:
        return jsonify(error=f"Local video not found: {relative_path}"), 404

    file_size = os.path.getsize(path)
    mime = "video/mp4"
    range_header = request.headers.get("Range")

    if range_header:
        # Parse "bytes=start-end"
        byte1, byte2 = 0, None
        m = range_header.strip().replace("bytes=", "").split("-")
        byte1 = int(m[0]) if m[0] else 0
        byte2 = int(m[1]) if len(m) > 1 and m[1] else file_size - 1
        length = byte2 - byte1 + 1

        def generate_range():
            with open(path, "rb") as f:
                f.seek(byte1)
                remaining = length
                while remaining > 0:
                    chunk = f.read(min(65536, remaining))
                    if not chunk:
                        break
                    remaining -= len(chunk)
                    yield chunk

        resp = Response(generate_range(), 206, mimetype=mime, direct_passthrough=True)
        resp.headers["Content-Range"] = f"bytes {byte1}-{byte2}/{file_size}"
        resp.headers["Accept-Ranges"] = "bytes"
        resp.headers["Content-Length"] = str(length)
        return resp

    def generate_full():
        with open(path, "rb") as f:
            while True:
                chunk = f.read(65536)
                if not chunk:
                    break
                yield chunk

    resp = Response(generate_full(), 200, mimetype=mime, direct_passthrough=True)
    resp.headers["Accept-Ranges"] = "bytes"
    resp.headers["Content-Length"] = str(file_size)
    return resp

@app.route('/api/local-video/thumbnail')
def local_video_thumbnail():
    relative_path = request.args.get("path", "")
    try:
        path = app_video.get_thumbnail_path(relative_path)
    except ValueError as error:
        return jsonify(error=str(error)), 400
    except FileNotFoundError:
        return jsonify(error=f"Local video not found: {relative_path}"), 404
    except RuntimeError as error:
        if str(error) == "generating":
            return jsonify(status="generating"), 202
        return jsonify(error=str(error)), 422
    return send_file(path, conditional=True, mimetype="image/jpeg")

@app.route('/api/local-video', methods=['DELETE'])
def local_video_delete():
    body = request.get_json(silent=True) or {}
    summary = app_video.delete_local_video(body.get("path"))
    status_codes = {
        "ok": 200,
        "invalid_path": 400,
        "not_found": 404,
        "busy": 409,
        "delete_failed": 409,
    }
    return jsonify(summary), status_codes.get(summary["status"], 409)

@app.route('/api/upload/status')
def upload_status():
    return jsonify(app_upload.get_status())

@app.route('/api/health')
def health():
    return jsonify(app_health.collect_health())

@app.route('/api/alerts/status')
def alert_status():
    return jsonify(app_alerts.get_status())

@app.route('/api/upload/dashcam_toggle', methods=['POST'])
def upload_dashcam_toggle():
    body = request.get_json(silent=True) or {}
    if not isinstance(body.get("enabled"), bool):
        return jsonify(error="expected JSON body {'enabled': true|false}"), 400
    app_upload.set_dashcam_upload_enabled(body["enabled"])
    return jsonify(app_upload.get_status())

# not sure if im gonna use this
@app.route('/api/obd_speed/')
def data():
    data = app_obd.speed
    response = make_response(json.dumps(data))
    response.content_type = 'application/json'
    return response

@app.route('/api/dtc')
def api_dtc():
    return jsonify({
        "mil": app_obd.get_fresh_mil(),
        "codes": app_obd.get_fresh_dtc_codes(),
    })

@app.route('/api/stats')
def api_stats():
    return jsonify(app_sql.get_overview_stats())

if __name__ == '__main__':
    # Debug/Development
    # app.run(debug=True, host="0.0.0.0", port="5000")
    # Production
    http_server = WSGIServer(('', 5000), app)
    print("server on http://localhost:5000")
    http_server.serve_forever()