"""
Preset endpoints - transcode configuration templates.
"""

from uuid import UUID

from fastapi import APIRouter, Depends, HTTPException

from api.deps import get_preset
from api.schema import PresetCreate, PresetResponse, PresetUpdate

router = APIRouter(prefix="/presets", tags=["presets"])


@router.post("/", response_model=PresetResponse, status_code=201)
def create_preset(data: PresetCreate):
    """Create a custom preset."""
    from mpr.media_assets.models import TranscodePreset

    preset = TranscodePreset.objects.create(
        name=data.name,
        description=data.description or "",
        container=data.container or "mp4",
        video_codec=data.video_codec or "libx264",
        video_bitrate=data.video_bitrate,
        video_crf=data.video_crf,
        video_preset=data.video_preset,
        resolution=data.resolution,
        framerate=data.framerate,
        audio_codec=data.audio_codec or "aac",
        audio_bitrate=data.audio_bitrate,
        audio_channels=data.audio_channels,
        audio_samplerate=data.audio_samplerate,
        extra_args=data.extra_args or [],
        is_builtin=False,
    )

    return preset


@router.get("/", response_model=list[PresetResponse])
def list_presets(include_builtin: bool = True):
    """List all presets."""
    from mpr.media_assets.models import TranscodePreset

    qs = TranscodePreset.objects.all()

    if not include_builtin:
        qs = qs.filter(is_builtin=False)

    return list(qs)


@router.get("/{preset_id}", response_model=PresetResponse)
def get_preset_detail(preset_id: UUID, preset=Depends(get_preset)):
    """Get preset details."""
    return preset


@router.patch("/{preset_id}", response_model=PresetResponse)
def update_preset(preset_id: UUID, data: PresetUpdate, preset=Depends(get_preset)):
    """Update a custom preset. Builtin presets cannot be modified."""
    if preset.is_builtin:
        raise HTTPException(status_code=403, detail="Cannot modify builtin preset")

    update_fields = []
    for field in [
        "name",
        "description",
        "container",
        "video_codec",
        "video_bitrate",
        "video_crf",
        "video_preset",
        "resolution",
        "framerate",
        "audio_codec",
        "audio_bitrate",
        "audio_channels",
        "audio_samplerate",
        "extra_args",
    ]:
        value = getattr(data, field, None)
        if value is not None:
            setattr(preset, field, value)
            update_fields.append(field)

    if update_fields:
        preset.save(update_fields=update_fields)

    return preset


@router.delete("/{preset_id}", status_code=204)
def delete_preset(preset_id: UUID, preset=Depends(get_preset)):
    """Delete a custom preset. Builtin presets cannot be deleted."""
    if preset.is_builtin:
        raise HTTPException(status_code=403, detail="Cannot delete builtin preset")

    preset.delete()