feat: add basic interface and cleanup

main.py

@@ -1,9 +1,10 @@
 from enum import Enum
 
 from fastapi import FastAPI
+from fastapi.responses import HTMLResponse
 
 from download_service import DownloadService
-from music_player import MusicPlayer
+from music_player import MusicPlayer, PlayerState
 
 
 class ChangePlayerState(Enum):
@@ -25,9 +26,16 @@ player = MusicPlayer()
 dl_service = DownloadService()
 
 
+# Interface
+@app.get("/", response_class=HTMLResponse)
+async def root():
+    with open("interface.html") as f:
+        return f.read()
+
+
 # Experimental
 @app.get("/queue", tags=["queue"])
-def play_music():
+def get_queue():
     return player.get_queue()
 
 
@@ -57,6 +65,11 @@ def player_stop():
     player.stop()
 
 
+@app.post("/player/skip", tags=["player"])
+def player_skip():
+    player.next()
+
+
 # Player
 @app.put("/player/volume", tags=["player"])
 def set_volume(volume: float):
@@ -68,6 +81,6 @@ def get_volume():
     return {"volume": player.get_volume()}
 
 
-@app.get("/player/state", tags=["player"])
-def get_state():
-    return {"state": player.get_state(), "current_track": player.get_current_track()}
+@app.get("/player", tags=["player"])
+def get_player_state() -> PlayerState:
+    return player.get_state()