from flask import (
    Flask,
    jsonify,
    Response,
    make_response,
    send_file,
    send_from_directory,
)
from flask import Response
import json
import time
import pickle
import numpy as np
import json
from pathlib import Path


def get_release_root_path():
    return Path(__file__).resolve().parents[1]

print("Loading data...")

assets_dir = get_release_root_path() / "visualizer" / "assets"
piece_id = 1
data_dir = get_release_root_path() / "dataset" / f"{piece_id:03d}"

with open(assets_dir / "mano_faces.pkl", "rb") as f:
    faces = pickle.load(f)

print("Data loaded.")
app = Flask(__name__)


@app.route("/")
def index():
    # return the index.html in the current directory
    return send_file(Path(__file__).parent / "static" / "index.html")


@app.route("/resources/<path:filename>")
def resources(filename):
    # return the index.html in the current directory
    return send_file(Path(__file__).parent / "static" / "resources" / filename)


@app.route("/js/<path:filename>")
def js(filename):
    # return the index.html in the current directory
    return send_file(Path(__file__).parent / "static" / "js" / filename)


@app.route("/css/<path:filename>")
def css(filename):
    # return the index.html in the current directory
    return send_file(Path(__file__).parent / "static" / "css" / filename)


@app.route("/vis")
def vis():
    return send_file(Path(__file__).parent / "static" / "vis.html")


@app.route("/pieces")
def pieces():
    # return the index.html in the current directory
    return send_file(Path(__file__).parent / "pieces.html")


@app.route("/pieces_metadata")
def pieces_metadata():
    # Ensure the file exists at this path
    metadata_file = assets_dir.parents[1] / "metadata.json"
    if metadata_file.exists():
        return send_file(metadata_file, mimetype="application/json")
    else:
        return jsonify({"error": "File not found"}), 404


def get_data_path(piece_id):
    return get_release_root_path() / "dataset" / f"{piece_id:03d}"


@app.route("/audio/<int:piece_id>")
def get_audio(piece_id):
    audio_path = get_data_path(piece_id) / "audio.mp3"
    return send_file(audio_path)


@app.route("/metadata/<int:piece_id>")
def get_piece_metadata(piece_id):
    return send_file(
        get_data_path(piece_id) / "vis" / "metadata.json", mimetype="application/json"
    )


@app.route("/mano_faces_data")
def mano_faces_data():
    d = {
        "left_faces": faces["left_faces"].tolist(),
        "right_faces": faces["right_faces"].tolist(),
    }
    return jsonify(d)


@app.route("/mano_vertices_data/<int:piece_id>")
def stream_mano_vertices_data(piece_id):
    data_path = get_data_path(piece_id)
    with open(data_path / "motion.pkl", "rb") as f:
        motion_data = pickle.load(f)
    with open(data_path / "vis" / "pressed_keys.pkl", "rb") as f:
        pressed_keys = pickle.load(f)
    print("motion data length", len(motion_data["left"]["mano_params"]["verts"]))
    print("pressed keys length", len(pressed_keys))
    n_frames = min(len(motion_data["left"]["mano_params"]["verts"]), len(pressed_keys))
    print("n_frames", n_frames)

    def generate_mesh_data():
        # Stream each frame of the mesh data
        for i in range(0, n_frames):
            frame_data = {
                "left_vertices": np.round(
                    motion_data["left"]["mano_params"]["verts"][i], 4
                )
                .astype(str)
                .tolist(),
                "right_vertices": np.round(
                    motion_data["right"]["mano_params"]["verts"][i], 4
                )
                .astype(str)
                .tolist(),
                "pressed_keys": pressed_keys[i].tolist(),
            }
            # Convert the frame data to a JSON string and add a newline delimiter
            yield json.dumps(
                frame_data
            ) + "\n"  # Send each frame as a complete JSON object

    response = Response(generate_mesh_data(), content_type="application/json")
    response.headers["Access-Control-Allow-Origin"] = "*"  # Allow CORS from any origin
    return response


@app.route("/piano_mesh/<path:filename>")
def get_obj_file(filename):
    piano_mesh_dir = assets_dir / "piano_meshes"
    if (piano_mesh_dir / filename).exists():
        response = send_from_directory(piano_mesh_dir, filename)
        response.headers["Access-Control-Allow-Origin"] = "*"
        return response
    else:
        return jsonify({"error": "File not found"}), 404


if __name__ == "__main__":
    app.run(host="0.0.0.0", port=8080)