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"""
Video Showcase API
FastAPI โ€” ุจุชุจุนุชู„ู‡ ุจูŠุงู†ุงุช ุงู„ู…ู†ุชุฌุŒ ุจูŠุฑุฌุนู„ูƒ ููŠุฏูŠูˆ
"""

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="ุจูŠุนู…ู„ ููŠุฏูŠูˆ Product Showcase ุชู„ู‚ุงุฆูŠ",
    version="1.0.0"
)

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


# ============================================================
# Models
# ============================================================
class VideoRequest(BaseModel):
    # --- ู…ุทู„ูˆุจ ---
    template: str = "showcase_arabic"
    title: str

    # --- ุงุฎุชูŠุงุฑูŠ ---
    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 ุดุบุงู„ โœ…",
        "endpoints": {
            "GET  /templates":        "ุดูˆู ุงู„ุชู…ุจู„ุชุณ ุงู„ู…ุชุงุญุฉ",
            "POST /render":           "ุงุนู…ู„ ููŠุฏูŠูˆ",
            "GET  /video/{video_id}": "ุญู…ู‘ู„ ุงู„ููŠุฏูŠูˆ",
            "GET  /health":           "Health check"
        }
    }


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


@app.get("/templates")
def get_templates():
    """ุดูˆู ูƒู„ ุงู„ุชู…ุจู„ุชุณ ุงู„ู…ุชุงุญุฉ"""
    return {
        "templates": list_templates(),
        "count": len(list_templates())
    }


@app.post("/render")
def render(req: VideoRequest):
    """
    ุงุนู…ู„ ููŠุฏูŠูˆ

    ู…ุซุงู„ ู…ู† n8n:
    POST /render
    {
        "template": "showcase_arabic",
        "title": "ุงุญุฏุซ ุงุฌู‡ุฒุฉ\\nูƒู‡ุฑุจุงุฆูŠุฉ",
        "discount": "ุฎุตู… 20ูช",
        "image_path": "/tmp/product.png",
        "music_path": "/tmp/music.mp3"
    }
    """
    # ุชุญู‚ู‚ ู…ู† ุงู„ุชู…ุจู„ุช
    try:
        template = get_template(req.template)
    except ValueError as e:
        raise HTTPException(status_code=404, detail=str(e))

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

    # ุนู…ู„ ุงู„ู€ 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"ุฎุทุฃ ููŠ ุงู„ู€ 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):
    """ุญู…ู‘ู„ ุงู„ููŠุฏูŠูˆ"""
    path = os.path.join(OUTPUT_DIR, f"{video_id}.mp4")
    if not os.path.exists(path):
        raise HTTPException(status_code=404, detail="ุงู„ููŠุฏูŠูˆ ู…ุด ู…ูˆุฌูˆุฏ ุฃูˆ ุงุชู…ุณุญ")
    return FileResponse(
        path,
        media_type="video/mp4",
        filename=f"showcase_{video_id}.mp4"
    )