import json
import os.path
import time

from opentelemetry.trace import Status, StatusCode

from entity.ffmpeg import FfmpegTask
import logging

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

logger = logging.getLogger('biz/ffmpeg')


def parse_ffmpeg_task(task_info, template_info):
    tracer = get_tracer(__name__)
    with tracer.start_as_current_span("parse_ffmpeg_task") as span:
        tasks = []
        # 中间片段
        task_params_str = task_info.get("taskParams", "{}")
        span.set_attribute("task_params", task_params_str)
        task_params = json.loads(task_params_str)
        for part in template_info.get("video_parts"):
            source = parse_video(part.get('source'), task_params, template_info)
            if not source:
                logger.warning("no video found for part: " + str(part))
                continue
            only_if = part.get('only_if', '')
            if only_if:
                if not check_placeholder_exist(only_if, task_params):
                    logger.info("because only_if exist, placeholder: %s not exist, skip part: %s", only_if, part)
                    continue
            sub_ffmpeg_task = FfmpegTask(source)
            sub_ffmpeg_task.resolution = template_info.get("video_size", "")
            sub_ffmpeg_task.annexb = True
            sub_ffmpeg_task.ext_data = find_placeholder_params(part.get('source'), task_params) or {}
            sub_ffmpeg_task.frame_rate = template_info.get("frame_rate", 25)
            sub_ffmpeg_task.center_cut = part.get("crop_mode", None)
            for effect in part.get('effects', []):
                sub_ffmpeg_task.add_effect(effect)
            for lut in part.get('filters', []):
                sub_ffmpeg_task.add_lut(os.path.join(template_info.get("local_path"), lut))
            for audio in part.get('audios', []):
                sub_ffmpeg_task.add_audios(os.path.join(template_info.get("local_path"), audio))
            for overlay in part.get('overlays', []):
                sub_ffmpeg_task.add_overlay(os.path.join(template_info.get("local_path"), overlay))
            tasks.append(sub_ffmpeg_task)
        output_file = "out_" + str(time.time()) + ".mp4"
        task = FfmpegTask(tasks, output_file=output_file)
        task.resolution = template_info.get("video_size", "")
        overall = template_info.get("overall_template")
        task.center_cut = template_info.get("crop_mode", None)
        task.frame_rate = template_info.get("frame_rate", 25)
        if overall.get('source', ''):
            source = parse_video(overall.get('source'), task_params, template_info)
            task.add_inputs(source)
        for effect in overall.get('effects', []):
            task.add_effect(effect)
        for lut in overall.get('filters', []):
            task.add_lut(os.path.join(template_info.get("local_path"), lut))
        for audio in overall.get('audios', []):
            task.add_audios(os.path.join(template_info.get("local_path"), audio))
        for overlay in overall.get('overlays', []):
            task.add_overlay(os.path.join(template_info.get("local_path"), overlay))
        return task


def find_placeholder_params(source, task_params):
    if source.startswith('PLACEHOLDER_'):
        placeholder_id = source.replace('PLACEHOLDER_', '')
        new_sources = task_params.get(placeholder_id, [])
        if type(new_sources) is list:
            if len(new_sources) == 0:
                logger.debug("no video found for placeholder: " + placeholder_id)
                return {}
            else:
                return new_sources[0]
        return {}


def parse_video(source, task_params, template_info):
    print(source)
    if source.startswith('PLACEHOLDER_'):
        placeholder_id = source.replace('PLACEHOLDER_', '')
        new_sources = task_params.get(placeholder_id, [])
        if type(new_sources) is list:
            if len(new_sources) == 0:
                logger.debug("no video found for placeholder: " + placeholder_id)
                return None
            else:
                _pick_source = new_sources.pop(0)
                new_sources = _pick_source.get("url")
        if new_sources.startswith("http"):
            _, source_name = os.path.split(new_sources)
            oss.download_from_oss(new_sources, source_name)
            return source_name
        return new_sources
    return os.path.join(template_info.get("local_path"), source)


def check_placeholder_exist(placeholder_id, task_params):
    if placeholder_id in task_params:
        new_sources = task_params.get(placeholder_id, [])
        if type(new_sources) is list:
            if len(new_sources) == 0:
                return False
            else:
                return True
        return True
    return False


def start_ffmpeg_task(ffmpeg_task):
    tracer = get_tracer(__name__)
    with tracer.start_as_current_span("start_ffmpeg_task") as span:
        for task in ffmpeg_task.analyze_input_render_tasks():
            result = start_ffmpeg_task(task)
            if not result:
                return False
        ffmpeg_task.correct_task_type()
        result = ffmpeg.start_render(ffmpeg_task)
        if not result:
            span.set_status(Status(StatusCode.ERROR))
            return False
        span.set_status(Status(StatusCode.OK))
        return True


def clear_task_tmp_file(ffmpeg_task):
    for task in ffmpeg_task.analyze_input_render_tasks():
        clear_task_tmp_file(task)
    try:
        if os.getenv("TEMPLATE_DIR") not in ffmpeg_task.get_output_file():
            os.remove(ffmpeg_task.get_output_file())
            logger.info("delete tmp file: " + ffmpeg_task.get_output_file())
        else:
            logger.info("skip delete template file: " + ffmpeg_task.get_output_file())
    except OSError:
        logger.warning("delete tmp file failed: " + ffmpeg_task.get_output_file())
        return False
    return True


def probe_video_info(ffmpeg_task):
    # 获取视频长度宽度和时长
    return ffmpeg.probe_video_info(ffmpeg_task.get_output_file())