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

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

from applications import log
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()
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 _roll_back_lock_tasks(self, task: str) -> int:
        return roll_back_lock_tasks(
            db_client=self.db_client,
            task=task,
            init_status=const.INIT_STATUS,
            processing_status=const.PROCESSING_STATUS,
            max_process_time=const.MAX_PROCESSING_TIME,
        )

    def _lock_task(self, task_id: int, task_name) -> int:
        return update_task_queue_status(
            db_client=self.db_client,
            task_id=task_id,
            task=task_name,
            ori_status=const.INIT_STATUS,
            new_status=const.PROCESSING_STATUS,
        )

    def get_upload_task_list(self, task_num: int = const.POOL_SIZE) -> list[dict]:
        """
        get upload task list
        """
        fetch_query = f"""
            select id, video_oss_path from {const.TABLE_NAME} 
            where upload_status = {const.INIT_STATUS}
            order by priority desc
            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 = const.POOL_SIZE) -> list[dict]:
        """
        get extract task list
        """
        fetch_query = f"""
            select id, file_name from {const.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 {const.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 {const.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 {const.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 {const.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 set_cover_result(self, task_id: int, cover_oss_path: str) -> int:
        update_query = f"""
            update {const.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,
            ),
        )
        return update_rows

    def upload_each_video(self, task: dict) -> None:
        lock_status = self._lock_task(task_id=task["id"], task_name="upload")
        if not lock_status:
            return None

        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,
                )
                return None
            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,
                )
                return None
        except Exception as e:
            log(
                task=const.TASK_NAME,
                function="upload_video_to_gemini_ai",
                message="task_failed",
                data={
                    "task_id": task["id"],
                    "track_back": traceback.format_exc(),
                    "error": str(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,
            )
            return None

    def upload_video_to_gemini_ai(
        self, max_processing_pool_size: int = const.POOL_SIZE
    ) -> None:
        # upload video to gemini ai
        roll_back_lock_tasks_count = self._roll_back_lock_tasks(task="upload")
        log(
            task=const.TASK_NAME,
            function="upload_video_to_gemini_ai",
            message=f"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"):
                self.upload_each_video(task=task)

        else:
            log(
                task=const.TASK_NAME,
                function="upload_video_to_gemini_ai",
                message="reach pool size, no more space for task to upload",
            )

    def extract_each_video(self, task: dict) -> None:
        # lock task
        lock_status = self._lock_task(task_id=task["id"], task_name="extract")
        if not lock_status:
            return None

        file_name = task["file_name"]
        video_local_path = os.path.join(const.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,
                    )
                    log(
                        task=const.TASK_NAME,
                        function="extract_best_frame_with_gemini_ai",
                        message="google is still processing this video",
                        data={
                            "task_id": task["id"],
                            "file_name": file_name,
                            "state": state,
                        },
                    )

                case "FAILED":
                    # google process this video failed
                    update_query = f"""
                        update {const.TABLE_NAME}
                        set file_state = %s, extract_status = %s, extract_status_ts = %s
                        where id = %s and extract_status = %s;
                    """
                    self.db_client.save(
                        query=update_query,
                        params=(
                            "FAILED",
                            const.FAIL_STATUS,
                            datetime.datetime.now(),
                            task["id"],
                            const.PROCESSING_STATUS,
                        ),
                    )
                    log(
                        task=const.TASK_NAME,
                        function="extract_best_frame_with_gemini_ai",
                        message="google process this video failed",
                        data={
                            "task_id": task["id"],
                            "file_name": file_name,
                            "state": state,
                        },
                    )

                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)
                        log(
                            task=const.TASK_NAME,
                            function="extract_best_frame_with_gemini_ai",
                            message="video process successfully",
                            data={
                                "task_id": task["id"],
                                "file_name": file_name,
                                "state": state,
                                "best_frame_tims_ms": best_frame_tims_ms,
                            },
                        )
                    except Exception as e:
                        log(
                            task=const.TASK_NAME,
                            function="extract_best_frame_with_gemini_ai",
                            message="task_failed_inside_cycle",
                            data={
                                "task_id": task["id"],
                                "track_back": traceback.format_exc(),
                                "error": str(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:
            log(
                task=const.TASK_NAME,
                function="extract_best_frame_with_gemini_ai",
                message="task_failed_outside_cycle",
                data={
                    "task_id": task["id"],
                    "track_back": traceback.format_exc(),
                    "error": str(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 extract_best_frame_with_gemini_ai(self):
        # roll back lock tasks
        roll_back_lock_tasks_count = self._roll_back_lock_tasks(task="extract")
        log(
            task=const.TASK_NAME,
            function="extract_best_frame_with_gemini_ai",
            message=f"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"):
            self.extract_each_video(task=task)

    def get_each_cover(self, task: dict) -> None:
        lock_status = self._lock_task(task_id=task["id"], task_name="get_cover")
        if not lock_status:
            return None

        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
            )
            log(
                task=const.TASK_NAME,
                function="extract_cover_with_ffmpeg",
                message="get_video_cover_with_ffmpeg",
                data={
                    "task_id": task["id"],
                    "video_oss_path": task["video_oss_path"],
                    "time_millisecond_str": time_str,
                    "response": response,
                },
            )
            if response["success"] and response["data"]:
                cover_oss_path = response["data"]
                self.set_cover_result(task_id=task["id"], cover_oss_path=cover_oss_path)
            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:
            log(
                task=const.TASK_NAME,
                function="extract_cover_with_ffmpeg",
                message="time_str format is not correct",
                data={
                    "task_id": task["id"],
                    "video_oss_path": task["video_oss_path"],
                    "time_millisecond_str": time_str,
                },
            )
            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,
            )

    def get_cover_with_best_frame(self):
        """
        get cover with best frame
        """
        # roll back lock tasks
        roll_back_lock_tasks_count = self._roll_back_lock_tasks(task="get_cover")
        log(
            task=const.TASK_NAME,
            function="extract_cover_with_ffmpeg",
            message=f"roll_back_lock_tasks_count: {roll_back_lock_tasks_count}",
        )
        # get task list
        task_list = self.get_cover_task_list()
        for task in tqdm(task_list, desc="extract_cover_with_ffmpeg"):
            self.get_each_cover(task=task)