import cv2
import pyray as ray

from libs.audio import audio
from libs.utils import get_current_ms


class VideoPlayer:
    def __init__(self, path: str):
        self.video_path = path
        self.start_ms = None

        self.current_frame = None
        self.last_frame = self.current_frame
        self.frame_index = 0
        self.frames = []
        self.cap = cv2.VideoCapture(self.video_path)
        self.fps = self.cap.get(cv2.CAP_PROP_FPS)

        self.is_finished = [False, False]
        audio_path = path[:-4] + '.ogg'
        self.audio = audio.load_music_stream(audio_path)

    def convert_frames_background(self, index: int):
        if not self.cap.isOpened():
            raise ValueError("Error: Could not open video file.")

        total_frames = int(self.cap.get(cv2.CAP_PROP_FRAME_COUNT))
        if len(self.frames) == total_frames:
            return 0
        self.cap.set(cv2.CAP_PROP_POS_FRAMES, index)

        success, frame = self.cap.read()

        timestamp = (index / self.fps * 1000)
        frame_rgb  = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)

        new_frame = ray.Image(frame_rgb.tobytes(), frame_rgb.shape[1], frame_rgb.shape[0], 1, ray.PixelFormat.PIXELFORMAT_UNCOMPRESSED_R8G8B8)

        self.frames.append((timestamp, new_frame))

    def convert_frames(self):
        if not self.cap.isOpened():
            raise ValueError("Error: Could not open video file.")

        frame_count = 0
        success, frame = self.cap.read()

        while success:
            timestamp = (frame_count / self.fps * 1000)
            frame_rgb  = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)

            new_frame = ray.Image(frame_rgb.tobytes(), frame_rgb.shape[1], frame_rgb.shape[0], 1, ray.PixelFormat.PIXELFORMAT_UNCOMPRESSED_R8G8B8)

            self.frames.append((timestamp, new_frame))

            success, frame = self.cap.read()
            frame_count += 1

        self.cap.release()
        print(f"Extracted {len(self.frames)} frames.")
        self.start_ms = get_current_ms()

    def check_for_start(self):
        if self.frames == []:
            self.convert_frames()
        if not audio.is_music_stream_playing(self.audio):
            audio.play_music_stream(self.audio)

    def audio_manager(self):
        audio.update_music_stream(self.audio)
        time_played = audio.get_music_time_played(self.audio) / audio.get_music_time_length(self.audio)
        ending_lenience = 0.95
        if time_played > ending_lenience:
            self.is_finished[1] = True

    def update(self):
        self.check_for_start()
        self.audio_manager()

        if self.frame_index == len(self.frames)-1:
            self.is_finished[0] = True
            return

        if self.start_ms is None:
            return

        timestamp, frame = self.frames[self.frame_index][0], self.frames[self.frame_index][1]
        elapsed_time = get_current_ms() - self.start_ms
        if elapsed_time >= timestamp:
            self.current_frame = ray.load_texture_from_image(frame)
            if self.last_frame != self.current_frame and self.last_frame is not None:
                ray.unload_texture(self.last_frame)
            self.frame_index += 1
            self.last_frame = self.current_frame

    def draw(self):
        if self.current_frame is not None:
            ray.draw_texture(self.current_frame, 0, 0, ray.WHITE)

    def __del__(self):
        if hasattr(self, 'current_frame') and self.current_frame:
            ray.unload_texture(self.current_frame)
        if hasattr(self, 'last_frame') and self.last_frame:
            ray.unload_texture(self.last_frame)
        if audio.is_music_stream_playing(self.audio):
            audio.stop_music_stream(self.audio)