import os
from fastapi import FastAPI
from fastapi.responses import HTMLResponse
from fastapi.staticfiles import StaticFiles
from fastapi.middleware.cors import CORSMiddleware
from app.config import settings
from app.api.v1.audio import router as audio_router
from app.api.v1.tasks import router as tasks_router
from app.api.v1.multitrack import router as multitrack_router
from app.api.v1.auth import router as auth_router
from app.api.v1.admin import router as admin_router
from app.api.v1.projects import router as projects_router
from app.api.v1.user_config import router as user_config_router
from app.api.v1.ai_proxy import router as ai_proxy_router
from app.api.v1.ai_presets import router as ai_presets_router
from app.api.v1.plugins import router as plugins_router
from app.api.v1.media import router as media_router
from app.core.auth import seed_admin
from app.core.soundfont_scanner import SoundFontAutoScanner

# Ensure storage directories exist
os.makedirs(settings.UPLOADS_DIR, exist_ok=True)
os.makedirs(settings.PROCESSED_DIR, exist_ok=True)

app = FastAPI(title="SonicForge API Engine")

from fastapi.middleware.gzip import GZipMiddleware

app.add_middleware(GZipMiddleware, minimum_size=500)

app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# Mount storage directory (must come before general /static mount)
app.mount("/static/audio", StaticFiles(directory=settings.STORAGE_DIR), name="audio")
# Mount app static files (js, css)
STATIC_DIR = os.path.join(os.path.dirname(__file__), "static")
app.mount("/static", StaticFiles(directory=STATIC_DIR), name="static")

# Include routers
app.include_router(audio_router, prefix="/api/v1/audio", tags=["audio"])
app.include_router(tasks_router, prefix="/api/v1/audio", tags=["tasks"])
app.include_router(multitrack_router, prefix="/api/v1/multitrack", tags=["multitrack"])
app.include_router(auth_router, prefix="/api/v1/auth", tags=["auth"])
app.include_router(admin_router, prefix="/api/v1/admin", tags=["admin"])
app.include_router(projects_router, prefix="/api/v1/projects", tags=["projects"])
app.include_router(user_config_router, prefix="/api/v1/user", tags=["user_config"])
app.include_router(ai_proxy_router, prefix="/api/v1/ai", tags=["ai"])
app.include_router(ai_presets_router, prefix="/api/v1/ai", tags=["ai"])
app.include_router(plugins_router, prefix="/api/v1/plugins", tags=["plugins"])
app.include_router(media_router, prefix="/api/v1/media", tags=["media"])

# Seed admin user on startup
@app.on_event("startup")
async def startup_seed_admin():
    seed_admin()

@app.on_event("startup")
async def startup_convert_soundfonts():
    # SF2 -> SF3 conversion is disabled: the client FluidSynth WASM cannot decode
    # Ogg Vorbis (SF3) samples, so converted SF3s would play silence. The download
    # endpoint serves SF2 when available and converts SF3 -> SF2 on demand instead.
    pass

@app.on_event("startup")
async def startup_sf_scanner():
    scanner = SoundFontAutoScanner()
    scanner.start_background(interval=30)

@app.get("/", response_class=HTMLResponse)
async def get_index():
    index_path = os.path.join(settings.TEMPLATES_DIR, "index.html")
    if not os.path.exists(index_path):
        return HTMLResponse(content=f"<h1>SonicForge Studio: index.html not found at {index_path}</h1>", status_code=404)
    with open(index_path, "r", encoding="utf-8") as file:
        return HTMLResponse(content=file.read(), status_code=200)

@app.get("/favicon.svg")
async def get_favicon():
    import os
    favicon_path = os.path.join(settings.TEMPLATES_DIR, "favicon.svg")
    if os.path.exists(favicon_path):
        from fastapi.responses import FileResponse
        return FileResponse(favicon_path, media_type="image/svg+xml")
    return HTMLResponse(content="", status_code=404)


@app.get("/ai-prompt-generator", response_class=HTMLResponse)
async def get_ai_prompt_generator():
    md_path = os.path.join(settings.BASE_DIR, "md", "49_AI_PROMPT_GENERATOR.md")
    if not os.path.exists(md_path):
        return HTMLResponse(content="<h1>File not found</h1>", status_code=404)
    with open(md_path, "r", encoding="utf-8") as file:
        return HTMLResponse(content=file.read(), status_code=200)