import json
import os.path
import time
from concurrent.futures import ThreadPoolExecutor

from opentelemetry.trace import Status, StatusCode

# 使用新架构组件，保持对旧FfmpegTask的兼容
from entity.ffmpeg import FfmpegTask
from entity.render_task import RenderTask, TaskType
from services import DefaultRenderService
import logging

from util import ffmpeg, oss
from util.ffmpeg import fade_out_audio
from telemetry import get_tracer

logger = logging.getLogger('biz/ffmpeg')
_render_service = None

def _get_render_service():
    """获取渲染服务实例"""
    global _render_service
    if _render_service is None:
        _render_service = DefaultRenderService()
    return _render_service


def parse_ffmpeg_task(task_info, template_info):
    """
    解析FFmpeg任务 - 保留用于向后兼容
    实际处理逻辑已迁移到 services.TaskService.create_render_task
    """
    logger.warning("parse_ffmpeg_task is deprecated, use TaskService.create_render_task instead")
    
    # 使用新的任务服务创建任务
    from services import DefaultTaskService, DefaultRenderService, DefaultTemplateService
    render_service = DefaultRenderService()
    template_service = DefaultTemplateService()
    task_service = DefaultTaskService(render_service, template_service)
    
    # 创建新的渲染任务
    render_task = task_service.create_render_task(task_info, template_info)
    
    # 为了向后兼容，创建一个FfmpegTask包装器
    ffmpeg_task = FfmpegTask(render_task.input_files, output_file=render_task.output_file)
    ffmpeg_task.resolution = render_task.resolution
    ffmpeg_task.frame_rate = render_task.frame_rate
    ffmpeg_task.annexb = render_task.annexb
    ffmpeg_task.center_cut = render_task.center_cut
    ffmpeg_task.zoom_cut = render_task.zoom_cut
    ffmpeg_task.ext_data = render_task.ext_data
    ffmpeg_task.effects = render_task.effects
    ffmpeg_task.luts = render_task.luts
    ffmpeg_task.audios = render_task.audios
    ffmpeg_task.overlays = render_task.overlays
    
    return ffmpeg_task


# 以下函数已迁移到新架构，保留用于向后兼容
def parse_video(source, task_params, template_info):
    """已迁移到 TaskService._parse_video_source"""
    logger.warning("parse_video is deprecated, functionality moved to TaskService")
    return source, {}

def check_placeholder_exist(placeholder_id, task_params):
    """已迁移到 TaskService._check_placeholder_exist_with_count"""  
    logger.warning("check_placeholder_exist is deprecated, functionality moved to TaskService")
    return placeholder_id in task_params

def check_placeholder_exist_with_count(placeholder_id, task_params, required_count=1):
    """已迁移到 TaskService._check_placeholder_exist_with_count"""
    logger.warning("check_placeholder_exist_with_count is deprecated, functionality moved to TaskService")
    if placeholder_id in task_params:
        new_sources = task_params.get(placeholder_id, [])
        if isinstance(new_sources, list):
            return len(new_sources) >= required_count
        return required_count <= 1
    return False


def start_ffmpeg_task(ffmpeg_task):
    """启动FFmpeg任务 - 使用新的渲染服务"""
    tracer = get_tracer(__name__)
    with tracer.start_as_current_span("start_ffmpeg_task") as span:
        try:
            # 使用新的渲染服务
            render_service = _get_render_service()
            result = render_service.render(ffmpeg_task)
            
            if result:
                span.set_status(Status(StatusCode.OK))
            else:
                span.set_status(Status(StatusCode.ERROR))
            
            return result
            
        except Exception as e:
            span.set_status(Status(StatusCode.ERROR))
            logger.error(f"FFmpeg task failed: {e}", exc_info=True)
            return False


def clear_task_tmp_file(ffmpeg_task):
    """清理临时文件 - 已迁移到 TaskService._cleanup_temp_files"""
    logger.warning("clear_task_tmp_file is deprecated, functionality moved to TaskService")
    try:
        template_dir = os.getenv("TEMPLATE_DIR", "")
        output_file = ffmpeg_task.get_output_file()
        if template_dir and template_dir not in output_file:
            if os.path.exists(output_file):
                os.remove(output_file)
                logger.info("Cleaned up temp file: %s", output_file)
        else:
            logger.info("Skipped cleanup of template file: %s", output_file)
        return True
    except OSError as e:
        logger.warning("Failed to cleanup temp file %s: %s", output_file, e)
        return False


def probe_video_info(ffmpeg_task):
    """获取视频长度宽度和时长 - 使用新的渲染服务"""
    render_service = _get_render_service()
    return render_service.get_video_info(ffmpeg_task.get_output_file())