#!/usr/bin/env python3
import subprocess
from flask import Flask, request, jsonify, send_file
from datetime import datetime
import os
import json
import uuid
import shutil
import base64
from io import BytesIO
import tempfile
import cv2
import numpy as np

app = Flask(__name__)

DATA_DIR = os.environ.get('DATA_DIR', 'data')
os.makedirs(DATA_DIR, exist_ok=True)

def image_data_url_to_binary(image_data_url):
    if image_data_url.startswith('data:image/jpeg;base64,'):
        return base64.b64decode(image_data_url.split(',')[1]), 'image/jpeg'
    elif image_data_url.startswith('data:image/png;base64,'):
        return base64.b64decode(image_data_url.split(',')[1]), 'image/png'
    else:
        raise ValueError(f"Unsupported image data URL: {image_data_url}")

@app.route('/')
def index():
    return "Emblem research API\n"

@app.route('/event/<category>', methods=['POST'])
def event(category):
    d = os.path.join(DATA_DIR, category, datetime.now().strftime("%Y-%m-%d"))
    os.makedirs(d, exist_ok=True)
    fname = datetime.now().strftime("%H%M%S") + '-' + str(uuid.uuid4())
    with open(os.path.join(d, fname), 'wb') as f:
        data = request.get_data()
        f.write(data)
    return {
        "ok": True,
        "message": "Event saved",
    }

def get_folders():
    return [
        x for x in os.listdir(DATA_DIR + "/json")
        if os.path.isdir(os.path.join(DATA_DIR, "json", x))
    ]

@app.route('/api/folders')
def folders():
    x = get_folders()
    ret = []
    for d in x:
        ret.append({
            "folder": d,
            "count": len(os.listdir(os.path.join(DATA_DIR, "json", d))),
        })
    return {
        "ok": True,
        "folders": ret,
    }

@app.route("/api/qrtool", methods=["POST"])
def qrtool():
    data = request.get_json()
    image_data_url = data.get("image_data_url")
    binary, mimetype = image_data_url_to_binary(image_data_url)
    if mimetype == 'image/png':
        suffix = ".png"
    elif mimetype == 'image/jpeg':
        suffix = ".jpg"
    else:
        raise ValueError(f"Unsupported image type: {mimetype}")
    with tempfile.NamedTemporaryFile(delete=False, suffix=suffix) as f:
        f.write(binary)
        qrtool = os.path.abspath("../alg/qrtool")
        if not os.path.exists(qrtool):
            return {
                "ok": False,
                "error": f"qrtool not found: {qrtool}",
            }
        cmd = ["./qrtool", data['cmd'], f.name]
        print(cmd)
        try:
            sp = subprocess.Popen(cmd, cwd=os.path.dirname(qrtool), stdout=subprocess.PIPE, stderr=subprocess.PIPE)
            stdout, stderr = sp.communicate()

            return {
                "exit_code": sp.returncode,
                "stdout": stdout.decode('utf-8'),
                "stderr": stderr.decode('utf-8'),
            }
        except Exception as e:
            return {
                "ok": False,
                "error": str(e),
            }

@app.route('/api/datapoints')
def datapoints():
    folder = request.args.get('folder')
    start = int(request.args.get('start', 0))
    count = int(request.args.get('count', 10))
    folder_dir = os.path.join(DATA_DIR, "json", folder)
    x = os.listdir(folder_dir)
    total = len(x)
    x = x[start:start+count]
    datapoints = []
    for f in x:
        try:
            datapoints.append(load_datapoint(os.path.join(folder_dir, f)))
        except Exception as e:
            print(e)
    return {
        "ok": True,
        "datapoints": datapoints,
        "total": total,
        "start": start,
        "count": count,
    }

def load_datapoint(path):
    with open(path, 'rb') as f:
        data = json.load(f)
    data["path"] = path
    data["datetime"] = get_file_datetime(path)
    return data

def get_file_datetime(path):
    return datetime.fromtimestamp(os.path.getmtime(path))

@app.route('/api/image')
def image():
    folder = request.args.get('folder')
    name = request.args.get('name')
    path = os.path.join(DATA_DIR, "json", folder, name)
    with open(path, 'rb') as f:
        data = json.load(f)
        binary, mimetype = image_data_url_to_binary(data["image_data_url"])
    buf = BytesIO(binary)
    return send_file(buf, mimetype=mimetype)

@app.route('/api/datapoint')
def datapoint():
    folder = request.args.get('folder')
    name = request.args.get('name')
    path = os.path.join(DATA_DIR, "json", folder, name)
    return {
        "ok": True,
        "datapoint": load_datapoint(path),
    }

def do_copy_to_folder(paths, target_folder):
    for path in paths:
        src = os.path.join(DATA_DIR, "json", path)
        dst = os.path.join(DATA_DIR, "json", target_folder)
        os.makedirs(dst, exist_ok=True)
        print(f"Copying {src} to {dst}")
        shutil.copy2(src, dst)

@app.route('/api/copy-to-folder', methods=['POST'])
def copy_to_folder():
    data = request.get_json()
    paths = data.get('paths')
    target_folder = data.get('target_folder')
    do_copy_to_folder(paths, target_folder)
    return {
        "ok": True,
        "message": "Datapoints copied to folder",
    }

def do_qrtool(image, cmd):
    with tempfile.NamedTemporaryFile(delete=False, suffix=".jpg") as f:
        image.save(f.name)
        qrtool = os.path.abspath("../alg/qrtool")
        cmd = ["./qrtool", cmd, f.name]
        print(cmd)
        sp = subprocess.Popen(cmd, cwd=os.path.dirname(qrtool), stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        stdout, stderr = sp.communicate()
        return stdout.decode('utf-8')

def calc_sharpness(image_data_url):
    image = image_data_url_to_image(image_data_url)
    # 转换为灰度图像
    gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
    
    # 高斯滤波
    blurred = cv2.GaussianBlur(gray, (5, 5), 0)
    
    # 计算Sobel梯度
    sobelx = cv2.Sobel(blurred, cv2.CV_64F, 1, 0, ksize=3)
    sobely = cv2.Sobel(blurred, cv2.CV_64F, 0, 1, ksize=3)
    
    # 计算梯度幅值
    magnitude = np.sqrt(sobelx**2 + sobely**2)
    
    # 计算清晰度
    sharpness = np.mean(magnitude) / (image.shape[0] * image.shape[1]) * 1000
    return sharpness

def image_data_url_to_image(image_data_url):
    binary, mimetype = image_data_url_to_binary(image_data_url)
    return cv2.imdecode(np.frombuffer(binary, np.uint8), cv2.IMREAD_COLOR)

def get_image_data_url(path):
    mimetype = "image/jpeg"
    if path.endswith(".png"):
        mimetype = "image/png"
    with open(path, "rb") as f:
        binary = f.read()
    return "data:" + mimetype + ";base64," + base64.b64encode(binary).decode('utf-8')

def get_image_dot_area(image):
    with tempfile.NamedTemporaryFile(delete=False, suffix=".jpg") as f:
        cv2.imwrite(f.name, image)
        qrtool = os.path.abspath("../alg/qrtool")
        cmd = ["./qrtool", "dot", f.name]
        if 0 == subprocess.call(cmd, cwd=os.path.dirname(qrtool)):
            return get_image_data_url(f.name + ".dot.jpg")

def analyze_datapoint(data):
    image = image_data_url_to_image(data['image_data_url'])
    # data["clarity"] = do_qrtool(image, "clarity").split()[-1]
    # data["analyze_result"] = data
    data["analyze_result"] = {}
    data["dot_area"] = get_image_dot_area(image)
    if data["dot_area"]:
        data["analyze_result"]["dot_area_sharpness"] = calc_sharpness(data["dot_area"])
    return data

@app.route('/api/analyze', methods=['POST'])
def analyze():
    data = request.get_json()
    analyze_datapoint(data)
    return data

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=26966, debug=True)