from typing import Annotated
from urllib.parse import quote

from fastapi import Request, Depends, APIRouter, Query, HTTPException

from mediaflow_proxy.handlers import (
    handle_hls_stream_proxy,
    proxy_stream,
    get_manifest,
    get_playlist,
    get_segment,
    get_public_ip,
)
from mediaflow_proxy.schemas import (
    MPDSegmentParams,
    MPDPlaylistParams,
    HLSManifestParams,
    MPDManifestParams,
)
from mediaflow_proxy.utils.http_utils import get_proxy_headers, ProxyRequestHeaders

proxy_router = APIRouter()


@proxy_router.head("/hls/manifest.m3u8")
@proxy_router.get("/hls/manifest.m3u8")
async def hls_manifest_proxy(
    request: Request,
    hls_params: Annotated[HLSManifestParams, Query()],
    proxy_headers: Annotated[ProxyRequestHeaders, Depends(get_proxy_headers)],
):
    """
    Proxify HLS stream requests, fetching and processing the m3u8 playlist or streaming the content.

    Args:
        request (Request): The incoming HTTP request.
        hls_params (HLSPlaylistParams): The parameters for the HLS stream request.
        proxy_headers (ProxyRequestHeaders): The headers to include in the request.

    Returns:
        Response: The HTTP response with the processed m3u8 playlist or streamed content.
    """
    return await handle_hls_stream_proxy(request, hls_params, proxy_headers)


@proxy_router.head("/stream")
@proxy_router.get("/stream")
@proxy_router.head("/stream/{filename:path}")
@proxy_router.get("/stream/{filename:path}")
async def proxy_stream_endpoint(
    request: Request,
    proxy_headers: Annotated[ProxyRequestHeaders, Depends(get_proxy_headers)],
    destination: str = Query(..., description="The URL of the stream.", alias="d"),
    filename: str | None = None,
):
    """
    Proxify stream requests to the given video URL.

    Args:
        request (Request): The incoming HTTP request.
        proxy_headers (ProxyRequestHeaders): The headers to include in the request.
        destination (str): The URL of the stream to be proxied.
        filename (str | None): The filename to be used in the response headers.

    Returns:
        Response: The HTTP response with the streamed content.
    """
    content_range = proxy_headers.request.get("range", "bytes=0-")
    if "nan" in content_range.casefold():
        # Handle invalid range requests "bytes=NaN-NaN"
        raise HTTPException(status_code=416, detail="Invalid Range Header")
    proxy_headers.request.update({"range": content_range})
    if filename:
        # If a filename is provided, set it in the headers using RFC 6266 format
        try:
            # Try to encode with latin-1 first (simple case)
            filename.encode("latin-1")
            content_disposition = f'attachment; filename="{filename}"'
        except UnicodeEncodeError:
            # For filenames with non-latin-1 characters, use RFC 6266 format with UTF-8
            encoded_filename = quote(filename.encode("utf-8"))
            content_disposition = f"attachment; filename*=UTF-8''{encoded_filename}"

        proxy_headers.response.update({"content-disposition": content_disposition})

    return await proxy_stream(request.method, destination, proxy_headers)


@proxy_router.get("/mpd/manifest.m3u8")
async def mpd_manifest_proxy(
    request: Request,
    manifest_params: Annotated[MPDManifestParams, Query()],
    proxy_headers: Annotated[ProxyRequestHeaders, Depends(get_proxy_headers)],
):
    """
    Retrieves and processes the MPD manifest, converting it to an HLS manifest.

    Args:
        request (Request): The incoming HTTP request.
        manifest_params (MPDManifestParams): The parameters for the manifest request.
        proxy_headers (ProxyRequestHeaders): The headers to include in the request.

    Returns:
        Response: The HTTP response with the HLS manifest.
    """
    return await get_manifest(request, manifest_params, proxy_headers)


@proxy_router.get("/mpd/playlist.m3u8")
async def playlist_endpoint(
    request: Request,
    playlist_params: Annotated[MPDPlaylistParams, Query()],
    proxy_headers: Annotated[ProxyRequestHeaders, Depends(get_proxy_headers)],
):
    """
    Retrieves and processes the MPD manifest, converting it to an HLS playlist for a specific profile.

    Args:
        request (Request): The incoming HTTP request.
        playlist_params (MPDPlaylistParams): The parameters for the playlist request.
        proxy_headers (ProxyRequestHeaders): The headers to include in the request.

    Returns:
        Response: The HTTP response with the HLS playlist.
    """
    return await get_playlist(request, playlist_params, proxy_headers)


@proxy_router.get("/mpd/segment.mp4")
async def segment_endpoint(
    segment_params: Annotated[MPDSegmentParams, Query()],
    proxy_headers: Annotated[ProxyRequestHeaders, Depends(get_proxy_headers)],
):
    """
    Retrieves and processes a media segment, decrypting it if necessary.

    Args:
        segment_params (MPDSegmentParams): The parameters for the segment request.
        proxy_headers (ProxyRequestHeaders): The headers to include in the request.

    Returns:
        Response: The HTTP response with the processed segment.
    """
    return await get_segment(segment_params, proxy_headers)


@proxy_router.get("/ip")
async def get_mediaflow_proxy_public_ip():
    """
    Retrieves the public IP address of the MediaFlow proxy server.

    Returns:
        Response: The HTTP response with the public IP address in the form of a JSON object. {"ip": "xxx.xxx.xxx.xxx"}
    """
    return await get_public_ip()