from gevent import pywsgi
import subprocess
import threading
import time
from flask import Flask, render_template, Response, jsonify, request, send_file
from queue import Queue, Empty
import os, sys
import json
import uuid
import io
import zipfile
from datetime import datetime

app = Flask(__name__)

# 获取当前脚本所在目录（即打包后的exe所在目录）
if getattr(sys, 'frozen', False):
    # 如果是PyInstaller打包后的exe
    BASE_DIR = sys._MEIPASS
else:
    # 普通Python脚本
    BASE_DIR = os.path.dirname(os.path.abspath(__file__))

# 配置
UPLOAD_FOLDER = os.path.join(BASE_DIR, 'uploads')
SCRIPT_FOLDER = os.path.join(BASE_DIR, 'scripts')
# UPLOAD_FOLDER = 'uploads'
# SCRIPT_FOLDER = 'scripts'

ALLOWED_EXTENSIONS = {'tar.gz', 'tgz'}
LOG_FOLDERS = {
    'network': '/home/forlinx/Desktop/workspace/TPMFM-A/logs',
    'compute': '/home/forlinx/Desktop/workspace/dataParsing/logs',
    'monitor': '/home/forlinx/monitor/storage/logs'
}

# 创建必要的目录
os.makedirs(UPLOAD_FOLDER, exist_ok=True)
os.makedirs(SCRIPT_FOLDER, exist_ok=True)

# 存储执行状态和输出的全局变量
execution_data = {
    'is_running': False,
    'output': [],
    'process': None,
    'current_file': None
}

def allowed_file(filename):
    """检查文件扩展名是否允许"""
    return '.' in filename and filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS or \
           filename.endswith('.tar.gz') or filename.endswith('.tgz')

def run_fixed_shell_script(software_type, uploaded_file_path, output_queue):
    """运行固定的shell脚本处理上传的文件"""
    try:
        # 固定的shell脚本路径
        fixed_script_path = os.path.join(SCRIPT_FOLDER, 'run.sh')
        
        # 检查固定脚本是否存在，如果不存在则创建
        if not os.path.exists(fixed_script_path):
            create_default_script(fixed_script_path)
        
        # 确保脚本有执行权限
        os.chmod(fixed_script_path, 0o755)
        
        # 使用Popen执行固定脚本，传入上传的文件作为参数
        process = subprocess.Popen(
            ['bash', fixed_script_path, software_type, uploaded_file_path],
            stdout=subprocess.PIPE,
            stderr=subprocess.STDOUT,
            text=True,
            bufsize=1,
            universal_newlines=True
        )
        
        execution_data['process'] = process
        
        # 实时读取输出
        for line in iter(process.stdout.readline, ''):
            if line:
                # 清理行尾的换行符，添加HTML换行
                clean_line = line.rstrip('\n')
                output_queue.put(f"{clean_line}<br>")
        
        process.wait()
        return_code = process.returncode
        
        if return_code == 0:
            output_queue.put(f"<span style='color: green'>文件处理完成！退出码: {return_code}</span><br>")
        else:
            output_queue.put(f"<span style='color: red'>文件处理失败！退出码: {return_code}</span><br>")
            
    except Exception as e:
        output_queue.put(f"<span style='color: red'>执行错误: {str(e)}</span><br>")
    finally:
        execution_data['is_running'] = False
        execution_data['process'] = None

@app.route('/')
def index():
    """主页面"""
    return render_template('index.html')

@app.route('/upload', methods=['POST'])
def upload_file():
    """上传文件并自动执行处理"""
    if execution_data['is_running']:
        return jsonify({
            'success': False,
            'message': '当前有任务正在执行，请等待完成'
        })
    
    # 检查是否有文件
    if 'file' not in request.files:
        return jsonify({'success': False, 'message': '没有选择文件'})
    
    file = request.files['file']
    # 获取 software_type
    software_type = request.form.get('software_type')
    
    if file.filename == '':
        return jsonify({'success': False, 'message': '没有选择文件'})
    
    if file and allowed_file(file.filename):
        # 生成唯一文件名
        # filename = f"{uuid.uuid4().hex}_{file.filename}"
        filename = file.filename
        filepath = os.path.join(UPLOAD_FOLDER, filename)

        # 保存文件
        file.save(filepath)
        
        # 重置输出
        execution_data['output'] = []
        execution_data['is_running'] = True
        execution_data['current_file'] = filename
        
        # 创建输出队列
        output_queue = Queue()
        
        # 在新线程中执行固定的shell脚本
        thread = threading.Thread(
            target=run_fixed_shell_script,
            args=(software_type, filepath, output_queue),
            daemon=True
        )
        thread.start()
        
        # 启动一个线程来定期从队列中获取输出
        def collect_output():
            while execution_data['is_running'] or not output_queue.empty():
                try:
                    # 从队列获取输出，最多等待1秒
                    line = output_queue.get(timeout=1)
                    execution_data['output'].append(line)
                except Empty:
                    continue
                except Exception as e:
                    print(f"收集输出时出错: {e}")
                    break
        
        collection_thread = threading.Thread(target=collect_output, daemon=True)
        collection_thread.start()
        
        return jsonify({
            'success': True,
            'message': '文件上传成功，开始处理',
            'filename': filename
        })
    
    return jsonify({'success': False, 'message': '不支持的文件类型'})

@app.route('/stream')
def stream():
    """SSE流式输出"""
    def generate():
        last_index = 0
        while execution_data['is_running']:
            # 检查是否有新输出
            current_output = execution_data['output']
            if len(current_output) > last_index:
                # 发送新内容
                for i in range(last_index, len(current_output)):
                    yield f"data: {json.dumps({'output': current_output[i]})}\n\n"
                last_index = len(current_output)
            
            time.sleep(0.1)  # 短暂休眠减少CPU使用
        
        # 发送最后可能剩余的输出
        current_output = execution_data['output']
        if len(current_output) > last_index:
            for i in range(last_index, len(current_output)):
                yield f"data: {json.dumps({'output': current_output[i]})}\n\n"
        
        # 发送结束标志
        yield f"data: {json.dumps({'output': '<br><strong>处理完成</strong>'})}\n\n"
    
    return Response(
        generate(),
        mimetype='text/event-stream',
        headers={
            'Cache-Control': 'no-cache',
            'X-Accel-Buffering': 'no'
        }
    )

@app.route('/status')
def get_status():
    """获取执行状态"""
    return jsonify({
        'is_running': execution_data['is_running'],
        'current_file': execution_data['current_file'],
        'output_length': len(execution_data['output'])
    })

@app.route('/stop')
def stop_execution():
    """停止当前执行"""
    if execution_data['is_running'] and execution_data['process']:
        try:
            execution_data['process'].terminate()
            execution_data['is_running'] = False
            return jsonify({
                'success': True,
                'message': '已停止处理'
            })
        except Exception as e:
            return jsonify({
                'success': False,
                'message': f'停止失败: {str(e)}'
            })
    
    return jsonify({
        'success': False,
        'message': '没有正在执行的任务'
    })

@app.route('/clear_output', methods=['POST'])
def clear_output():
    """清空输出"""
    execution_data['output'] = []
    return jsonify({'success': True, 'message': '输出已清空'})

@app.route('/download_logs', methods=['GET'])
def download_logs():
    """下载指定软件的日志文件"""
    software_type = request.args.get('software', 'network')
    
    if software_type not in LOG_FOLDERS:
        return jsonify({
            'success': False,
            'message': '不支持的软件类型'
        }), 400
    
    log_folder = LOG_FOLDERS[software_type]
    
    # 检查日志文件夹是否存在
    if not os.path.exists(log_folder):
        return jsonify({
            'success': False,
            'message': f'日志文件夹不存在: {log_folder}'
        }), 404
    
    # 获取所有.log文件
    log_files = []
    for root, dirs, files in os.walk(log_folder):
        for file in files:
            if file.endswith('.log'):
                log_files.append(os.path.join(root, file))
    
    if not log_files:
        return jsonify({
            'success': False,
            'message': '未找到日志文件'
        }), 404
    
    # 创建临时ZIP文件
    temp_zip = io.BytesIO()
    
    try:
        with zipfile.ZipFile(temp_zip, 'w', zipfile.ZIP_DEFLATED) as zipf:
            for log_file in log_files:
                # 获取相对路径
                rel_path = os.path.relpath(log_file, log_folder)
                zipf.write(log_file, arcname=rel_path)
        
        temp_zip.seek(0)
        
        # 设置下载文件名
        timestamp = datetime.now().strftime('%Y%m%d_%H%M%S')
        filename = f'{software_type}_logs_{timestamp}.zip'
        
        # 记录下载日志
        # download_log_path = os.path.join(log_folder, f'{software_type}_download.log')
        # with open(download_log_path, 'a') as f:
        #     f.write(f'[{datetime.now()}] Logs downloaded: {filename}\n')
        
        # 发送ZIP文件
        return send_file(
            temp_zip,
            mimetype='application/zip',
            as_attachment=True,
            download_name=filename
        )
        
    except Exception as e:
        return jsonify({
            'success': False,
            'message': f'创建ZIP文件失败: {str(e)}'
        }), 500

if __name__ == '__main__':
    # 确保固定脚本存在
    fixed_script_path = os.path.join(SCRIPT_FOLDER, 'run.sh')
    
    print(f"固定脚本位置: {fixed_script_path}")
    print(f"上传目录: {UPLOAD_FOLDER}")
    
    # app.run(
    #     debug=True,
    #     host='0.0.0.0',
    #     port=5000,
    #     threaded=True
    # )

    server = pywsgi.WSGIServer(('0.0.0.0', 5000), app)
    try:
        server.serve_forever()
    except KeyboardInterrupt:
        print("OTA server stopped by user")
        server.stop()