"""
TranscodePreset Schema Definition

Source of truth for preset data model.
"""

from dataclasses import dataclass, field
from datetime import datetime
from typing import List, Optional
from uuid import UUID


@dataclass
class TranscodePreset:
    """
    A reusable transcoding configuration (like Handbrake presets).

    Presets can be builtin (shipped with the app) or user-created.
    """

    id: UUID
    name: str
    description: str = ""
    is_builtin: bool = False

    # Output container
    container: str = "mp4"  # mp4, mkv, webm, mov, avi

    # Video settings
    video_codec: str = "libx264"
    video_bitrate: Optional[str] = None  # "2M", "5000k"
    video_crf: Optional[int] = None  # Quality-based (0-51 for x264)
    video_preset: Optional[str] = None  # ultrafast...veryslow
    resolution: Optional[str] = None  # "1920x1080", "1280x720"
    framerate: Optional[float] = None

    # Audio settings
    audio_codec: str = "aac"
    audio_bitrate: Optional[str] = None  # "128k", "320k"
    audio_channels: Optional[int] = None  # 2 for stereo
    audio_samplerate: Optional[int] = None  # 44100, 48000

    # Advanced: extra FFmpeg arguments
    extra_args: List[str] = field(default_factory=list)

    # Timestamps
    created_at: Optional[datetime] = None
    updated_at: Optional[datetime] = None


BUILTIN_PRESETS = [
    {
        "name": "DaVinci Resolve",
        "description": "MPEG-4 (xvid) + MP3 - Compatible with DaVinci Resolve Free",
        "container": "avi",
        "video_codec": "mpeg4",
        "video_crf": 5,
        "audio_codec": "libmp3lame",
        "audio_bitrate": "320k",
        "audio_samplerate": 48000,
        "extra_args": ["-vtag", "xvid", "-pix_fmt", "yuv420p"],
    },
    {
        "name": "Copy (Trim Only)",
        "description": "Stream copy - No transcoding, fast trimming only",
        "container": "mp4",
        "video_codec": "copy",
        "audio_codec": "copy",
    },
    {
        "name": "Web H.264",
        "description": "H.264 + AAC - General web playback",
        "container": "mp4",
        "video_codec": "libx264",
        "video_crf": 23,
        "video_preset": "medium",
        "audio_codec": "aac",
        "audio_bitrate": "128k",
    },
    {
        "name": "Web H.265",
        "description": "HEVC + AAC - Smaller files, modern browsers",
        "container": "mp4",
        "video_codec": "libx265",
        "video_crf": 28,
        "video_preset": "medium",
        "audio_codec": "aac",
        "audio_bitrate": "128k",
    },
    {
        "name": "DNxHR HQ",
        "description": "DNxHR High Quality - Professional editing",
        "container": "mov",
        "video_codec": "dnxhd",
        "audio_codec": "pcm_s16le",
        "audio_samplerate": 48000,
        "extra_args": ["-profile:v", "dnxhr_hq", "-pix_fmt", "yuv422p"],
    },
    {
        "name": "H.264 NVENC",
        "description": "NVIDIA GPU encoding - Fast H.264",
        "container": "mp4",
        "video_codec": "h264_nvenc",
        "video_bitrate": "10M",
        "audio_codec": "aac",
        "audio_bitrate": "192k",
        "extra_args": ["-preset", "p4", "-rc", "vbr", "-cq", "19"],
    },
    {
        "name": "HEVC NVENC",
        "description": "NVIDIA GPU encoding - HEVC/H.265",
        "container": "mp4",
        "video_codec": "hevc_nvenc",
        "video_bitrate": "8M",
        "audio_codec": "aac",
        "audio_bitrate": "192k",
        "extra_args": ["-preset", "p4", "-rc", "vbr", "-cq", "23"],
    },
    {
        "name": "Archive ProRes",
        "description": "Apple ProRes 422 HQ - Archival quality",
        "container": "mov",
        "video_codec": "prores_ks",
        "audio_codec": "pcm_s16le",
        "audio_samplerate": 48000,
        "extra_args": ["-profile:v", "3"],  # ProRes 422 HQ
    },
]