"""
@author luojunhui
@desc find best frame from each video
"""

import os
import datetime
from tqdm import tqdm
from pymysql.cursors import DictCursor

from applications.api import GoogleAIAPI
from applications.const import GoogleVideoUnderstandTaskConst
from applications.db import DatabaseConnector
from config import long_articles_config
from coldStartTasks.ai_pipeline.basic import download_file
from coldStartTasks.ai_pipeline.basic import update_task_queue_status
from coldStartTasks.ai_pipeline.basic import roll_back_lock_tasks
from coldStartTasks.ai_pipeline.basic import extract_best_frame_prompt
from coldStartTasks.ai_pipeline.basic import get_video_cover
from coldStartTasks.ai_pipeline.basic import normalize_time_str

const = GoogleVideoUnderstandTaskConst()
table_name = "long_articles_new_video_cover"
dir_name = "static"
POOL_SIZE = 10
google_ai = GoogleAIAPI()


class ExtractVideoBestFrame:
    """
    extract video best frame from each video by GeminiAI
    """

    def __init__(self):
        self.db_client = DatabaseConnector(db_config=long_articles_config)
        self.db_client.connect()

    def get_upload_task_list(self, task_num: int = POOL_SIZE) -> list[dict]:
        """
        get upload task list
        """
        fetch_query = f"""
            select id, video_oss_path from {table_name} 
            where upload_status = {const.INIT_STATUS} and priority = 1
            limit {task_num};
        """
        upload_task_list = self.db_client.fetch(
            query=fetch_query, cursor_type=DictCursor
        )
        return upload_task_list

    def get_extract_task_list(self, task_num: int = POOL_SIZE) -> list[dict]:
        """
        get extract task list
        """
        fetch_query = f"""
            select id, file_name from {table_name}
            where upload_status = {const.SUCCESS_STATUS} and extract_status = {const.INIT_STATUS}
            order by file_expire_time
            limit {task_num};
        """
        extract_task_list = self.db_client.fetch(
            query=fetch_query, cursor_type=DictCursor
        )
        return extract_task_list

    def get_cover_task_list(self) -> list[dict]:
        """
        get cover task list
        """
        fetch_query = f"""
            select id, video_oss_path, best_frame_time_ms from {table_name}
            where extract_status = {const.SUCCESS_STATUS} and get_cover_status = {const.INIT_STATUS};
            """
        extract_task_list = self.db_client.fetch(
            query=fetch_query, cursor_type=DictCursor
        )
        return extract_task_list

    def get_processing_task_pool_size(self) -> int:
        """
        get processing task pool size
        """
        fetch_query = f"""
            select count(1) as pool_size from {table_name}
            where upload_status = {const.SUCCESS_STATUS} and file_state = 'PROCESSING' and extract_status = {const.INIT_STATUS};
        """
        fetch_response = self.db_client.fetch(query=fetch_query, cursor_type=DictCursor)
        processing_task_pool_size = (
            fetch_response[0]["pool_size"] if fetch_response else 0
        )
        return processing_task_pool_size

    def set_upload_result(
        self, task_id: int, file_name: str, file_state: str, file_expire_time: str
    ) -> int:
        update_query = f"""
            update {table_name} 
            set upload_status = %s, upload_status_ts = %s,
                file_name = %s, file_state = %s, file_expire_time = %s
            where id = %s and upload_status = %s;
        """
        update_rows = self.db_client.save(
            query=update_query,
            params=(
                const.SUCCESS_STATUS,
                datetime.datetime.now(),
                file_name,
                file_state,
                file_expire_time,
                task_id,
                const.PROCESSING_STATUS,
            ),
        )
        return update_rows

    def set_extract_result(
        self, task_id: int, file_state: str, best_frame_tims_ms: str
    ) -> int:
        update_query = f"""
            update {table_name} 
            set extract_status = %s, extract_status_ts = %s,
                file_state = %s, best_frame_time_ms = %s
            where id = %s and extract_status = %s;
        """
        update_rows = self.db_client.save(
            query=update_query,
            params=(
                const.SUCCESS_STATUS,
                datetime.datetime.now(),
                file_state,
                best_frame_tims_ms,
                task_id,
                const.PROCESSING_STATUS,
            ),
        )
        return update_rows

    def upload_video_to_gemini_ai(
        self, max_processing_pool_size: int = POOL_SIZE
    ) -> None:
        # upload video to gemini ai
        roll_back_lock_tasks_count = roll_back_lock_tasks(
            db_client=self.db_client,
            task="upload",
            init_status=const.INIT_STATUS,
            processing_status=const.PROCESSING_STATUS,
            max_process_time=const.MAX_PROCESSING_TIME,
        )
        print("roll_back_lock_tasks_count", roll_back_lock_tasks_count)

        processing_task_num = self.get_processing_task_pool_size()
        res_task_num = max_processing_pool_size - processing_task_num
        if res_task_num:
            upload_task_list = self.get_upload_task_list(task_num=res_task_num)
            for task in tqdm(upload_task_list, desc="upload_video_to_gemini_ai"):
                lock_status = update_task_queue_status(
                    db_client=self.db_client,
                    task_id=task["id"],
                    task="upload",
                    ori_status=const.INIT_STATUS,
                    new_status=const.PROCESSING_STATUS,
                )
                if not lock_status:
                    continue

                try:
                    file_path = download_file(task["id"], task["video_oss_path"])
                    upload_response = google_ai.upload_file(file_path)
                    if upload_response:
                        file_name, file_state, expire_time = upload_response
                        self.set_upload_result(
                            task_id=task["id"],
                            file_name=file_name,
                            file_state=file_state,
                            file_expire_time=expire_time,
                        )
                    else:
                        # set status as fail
                        update_task_queue_status(
                            db_client=self.db_client,
                            task_id=task["id"],
                            task="upload",
                            ori_status=const.PROCESSING_STATUS,
                            new_status=const.FAIL_STATUS,
                        )
                except Exception as e:
                    print(f"download_file error: {e}")
                    update_task_queue_status(
                        db_client=self.db_client,
                        task_id=task["id"],
                        task="upload",
                        ori_status=const.PROCESSING_STATUS,
                        new_status=const.FAIL_STATUS,
                    )
                    continue

        else:
            print("Processing task pool is full")

    def extract_best_frame_with_gemini_ai(self):
        # roll back lock tasks
        roll_back_lock_tasks_count = roll_back_lock_tasks(
            db_client=self.db_client,
            task="extract",
            init_status=const.INIT_STATUS,
            processing_status=const.PROCESSING_STATUS,
            max_process_time=const.MAX_PROCESSING_TIME,
        )
        print("roll_back_lock_tasks_count", roll_back_lock_tasks_count)

        # do extract frame task
        task_list = self.get_extract_task_list()
        for task in tqdm(task_list, desc="extract_best_frame_with_gemini_ai"):
            # lock task
            lock_status = update_task_queue_status(
                db_client=self.db_client,
                task_id=task["id"],
                task="extract",
                ori_status=const.INIT_STATUS,
                new_status=const.PROCESSING_STATUS,
            )
            if not lock_status:
                continue

            file_name = task["file_name"]
            video_local_path = os.path.join(dir_name, "{}.mp4".format(task["id"]))
            try:
                google_file = google_ai.get_google_file(file_name)
                state = google_file.state.name
                match state:
                    case "PROCESSING":
                        # google is still processing this video
                        update_task_queue_status(
                            db_client=self.db_client,
                            task_id=task["id"],
                            task="extract",
                            ori_status=const.PROCESSING_STATUS,
                            new_status=const.INIT_STATUS,
                        )
                        print("this video is still processing")

                    case "FAILED":
                        # google process this video failed
                        update_query = f"""
                            update {table_name}
                            set file_state = %s, extract_status = %s, extract_status_ts = %s
                            where id = %s and extract_status = %s;
                        """
                        update_rows = self.db_client.save(
                            query=update_query,
                            params=(
                                "FAILED",
                                const.FAIL_STATUS,
                                datetime.datetime.now(),
                                task["id"],
                                const.PROCESSING_STATUS,
                            ),
                        )

                    case "ACTIVE":
                        # video process successfully
                        try:
                            best_frame_tims_ms = google_ai.fetch_info_from_google_ai(
                                prompt=extract_best_frame_prompt(),
                                video_file=google_file,
                            )
                            if best_frame_tims_ms:
                                self.set_extract_result(
                                    task_id=task["id"],
                                    file_state="ACTIVE",
                                    best_frame_tims_ms=best_frame_tims_ms.strip(),
                                )
                            else:
                                update_task_queue_status(
                                    db_client=self.db_client,
                                    task_id=task["id"],
                                    task="extract",
                                    ori_status=const.PROCESSING_STATUS,
                                    new_status=const.FAIL_STATUS,
                                )
                            # delete local file and google file
                            if os.path.exists(video_local_path):
                                os.remove(video_local_path)

                            google_ai.delete_video(file_name)
                        except Exception as e:
                            print(e)
                            update_task_queue_status(
                                db_client=self.db_client,
                                task_id=task["id"],
                                task="extract",
                                ori_status=const.PROCESSING_STATUS,
                                new_status=const.FAIL_STATUS,
                            )

            except Exception as e:
                print(f"update_task_queue_status error: {e}")
                update_task_queue_status(
                    db_client=self.db_client,
                    task_id=task["id"],
                    task="extract",
                    ori_status=const.PROCESSING_STATUS,
                    new_status=const.FAIL_STATUS,
                )

    def get_cover_with_best_frame(self):
        """
        get cover with best frame
        """
        # get task list
        task_list = self.get_cover_task_list()
        for task in tqdm(task_list, desc="extract_cover_with_ffmpeg"):
            # lock task
            lock_status = update_task_queue_status(
                db_client=self.db_client,
                task_id=task["id"],
                task="get_cover",
                ori_status=const.INIT_STATUS,
                new_status=const.PROCESSING_STATUS,
            )
            if not lock_status:
                continue

            time_str = normalize_time_str(task["best_frame_time_ms"])
            if time_str:
                response = get_video_cover(
                    video_oss_path=task["video_oss_path"], time_millisecond_str=time_str
                )
                print(response)
                if response["success"] and response["data"]:
                    cover_oss_path = response["data"]
                    update_query = f"""
                        update {table_name}
                        set cover_oss_path = %s, get_cover_status = %s, get_cover_status_ts = %s
                        where id = %s and get_cover_status = %s;
                    """
                    update_rows = self.db_client.save(
                        query=update_query,
                        params=(
                            cover_oss_path,
                            const.SUCCESS_STATUS,
                            datetime.datetime.now(),
                            task["id"],
                            const.PROCESSING_STATUS,
                        ),
                    )
                else:
                    update_task_queue_status(
                        db_client=self.db_client,
                        task_id=task["id"],
                        task="get_cover",
                        ori_status=const.PROCESSING_STATUS,
                        new_status=const.FAIL_STATUS,
                    )
            else:
                update_task_queue_status(
                    db_client=self.db_client,
                    task_id=task["id"],
                    task="get_cover",
                    ori_status=const.PROCESSING_STATUS,
                    new_status=const.FAIL_STATUS,
                )