"""
Video Showcase API
FastAPI — بتبعتله بيانات المنتج، بيرجعلك فيديو
"""

import os
import uuid
from fastapi import FastAPI, HTTPException, BackgroundTasks
from fastapi.responses import FileResponse, JSONResponse
from pydantic import BaseModel
from typing import Optional

from templates import get_template, list_templates
from templates.base import RenderRequest
from renderer import render_video


app = FastAPI(
    title="Video Showcase API",
    description="بيعمل فيديو Product Showcase تلقائي",
    version="1.0.0"
)

OUTPUT_DIR = "/tmp/videos"
os.makedirs(OUTPUT_DIR, exist_ok=True)


# ============================================================
# Models
# ============================================================
class VideoRequest(BaseModel):
    # --- مطلوب ---
    template: str = "showcase_arabic"
    title: str

    # --- اختياري ---
    discount:      Optional[str]   = ""
    badge:         Optional[str]   = ""
    phone:         Optional[str]   = ""
    website:       Optional[str]   = ""
    image_path:    Optional[str]   = ""
    music_path:    Optional[str]   = ""
    bg_left:       Optional[str]   = ""
    bg_right:      Optional[str]   = ""
    duration:      Optional[int]   = 6
    fps:           Optional[int]   = 30
    width:         Optional[int]   = 1280
    height:        Optional[int]   = 720
    music_volume:  Optional[float] = 0.20


# ============================================================
# Routes
# ============================================================

@app.get("/")
def root():
    return {
        "status": "running",
        "message": "Video Showcase API شغال ✅",
        "endpoints": {
            "GET  /templates":        "شوف التمبلتس المتاحة",
            "POST /render":           "اعمل فيديو",
            "GET  /video/{video_id}": "حمّل الفيديو",
            "GET  /health":           "Health check"
        }
    }


@app.get("/health")
def health():
    return {"status": "ok"}


@app.get("/templates")
def get_templates():
    """شوف كل التمبلتس المتاحة"""
    return {
        "templates": list_templates(),
        "count": len(list_templates())
    }


@app.post("/render")
def render(req: VideoRequest):
    """
    اعمل فيديو

    مثال من n8n:
    POST /render
    {
        "template": "showcase_arabic",
        "title": "احدث اجهزة\\nكهربائية",
        "discount": "خصم 20٪",
        "image_path": "/tmp/product.png",
        "music_path": "/tmp/music.mp3"
    }
    """
    # تحقق من التمبلت
    try:
        template = get_template(req.template)
    except ValueError as e:
        raise HTTPException(status_code=404, detail=str(e))

    # ID فريد للفيديو
    video_id  = str(uuid.uuid4())[:8]
    output    = os.path.join(OUTPUT_DIR, f"{video_id}.mp4")

    # عمل الـ RenderRequest
    render_req = RenderRequest(
        title        = req.title,
        discount     = req.discount or "",
        badge        = req.badge or "",
        phone        = req.phone or "",
        website      = req.website or "",
        image_path   = req.image_path or "",
        music_path   = req.music_path or "",
        output_path  = output,
        bg_left      = req.bg_left or "",
        bg_right     = req.bg_right or "",
        duration     = req.duration or 6,
        fps          = req.fps or 30,
        width        = req.width or 1280,
        height       = req.height or 720,
        music_volume = req.music_volume or 0.20,
    )

    # Render
    try:
        final_path = render_video(template, render_req)
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"خطأ في الـ render: {str(e)}")

    size_mb = os.path.getsize(final_path) / 1024 / 1024

    return {
        "status":   "success",
        "video_id": video_id,
        "download": f"/video/{video_id}",
        "size_mb":  round(size_mb, 2),
        "template": req.template,
    }


@app.get("/video/{video_id}")
def download_video(video_id: str):
    """حمّل الفيديو"""
    path = os.path.join(OUTPUT_DIR, f"{video_id}.mp4")
    if not os.path.exists(path):
        raise HTTPException(status_code=404, detail="الفيديو مش موجود أو اتمسح")
    return FileResponse(
        path,
        media_type="video/mp4",
        filename=f"showcase_{video_id}.mp4"
    )