routers/presets.py

from fastapi import APIRouter, HTTPException, File, UploadFile, Form
import os
import json
import shutil
from schemas import SubtitlePreset
from typing import List, Optional

router = APIRouter()

# إعداد المسارات لتكون دائماً داخل مجلد Clipping
ROUTER_DIR = os.path.dirname(os.path.abspath(__file__))
CLIPPING_DIR = os.path.dirname(ROUTER_DIR)
PRESETS_DIR = os.path.join(CLIPPING_DIR, "temp_videos", "presets")
FONTS_DIR = os.path.join(CLIPPING_DIR, "temp_videos", "fonts")
os.makedirs(PRESETS_DIR, exist_ok=True)
os.makedirs(FONTS_DIR, exist_ok=True)

@router.post("/save", summary="Create or Update a Custom Preset")
async def save_preset(
    name: str = Form(..., description="Unique name for the preset"),
    font_name: str = Form("Arial", description="Font family name"),
    font_size: int = Form(48, description="Font size in pixels"),
    primary_color: str = Form("#FFFFFF", description="Text color (Hex)"),
    secondary_color: str = Form("#FFFF00", description="Highlight color (Hex)"),
    outline_color: str = Form("#000000", description="Outline color (Hex)"),
    back_color: str = Form("#000000", description="Background box color (Hex)"),
    outline_width: float = Form(2.0),
    shadow_depth: float = Form(1.0),
    alignment: int = Form(2, description="2=Bottom Center, 5=Middle Center, 8=Top Center"),
    margin_v: int = Form(100, description="Vertical margin from edge"),
    pop_up_scale: float = Form(1.2, description="Animation scale factor"),
    highlight_mode: str = Form("karaoke", description="karaoke or instant"),
    back_box_enabled: bool = Form(True),
    display_mode: str = Form("word", description="word or sentence"),
    max_words_per_line: int = Form(3, description="Max words per line in sentence mode"),
    uppercase: bool = Form(False, description="Convert English text to ALL CAPS"),
    letter_spacing: float = Form(0.0, description="Spacing between characters"),
    line_spacing: int = Form(0, description="Vertical spacing between lines"),
    background_opacity: float = Form(1.0, description="Opacity of background box (0.0 to 1.0)"),
    glow_intensity: int = Form(0, description="Intensity of glow effect (0 to 10)"),
    rotation_angle: float = Form(0.0, description="Rotation angle in degrees"),
    margin_h: int = Form(20, description="Horizontal margin"),
    custom_font_file: Optional[UploadFile] = File(None, description="Optional: Upload a .ttf or .otf font file")
):
    """
    يتيح هذا الـ Endpoint إنشاء تصميم كامل (Preset).
    يمكنك رفع خط خاص (Custom Font) وسيتم حفظه واستخدامه تلقائياً.
    """
    try:
        # 1. معالجة الخط الخاص إذا تم رفعه
        final_font_name = font_name
        if custom_font_file:
            font_ext = os.path.splitext(custom_font_file.filename)[1]
            if font_ext.lower() not in ['.ttf', '.otf']:
                raise HTTPException(status_code=400, detail="Only .ttf and .otf fonts are supported")
            
            font_path = os.path.join(FONTS_DIR, custom_font_file.filename)
            with open(font_path, "wb") as buffer:
                shutil.copyfileobj(custom_font_file.file, buffer)
            
            # نستخدم اسم الملف المرفوع كاسم للخط
            final_font_name = os.path.splitext(custom_font_file.filename)[0]

        # 2. تجهيز بيانات الـ Preset
        preset_dict = {
            "name": name,
            "font_name": final_font_name,
            "font_size": font_size,
            "primary_color": primary_color,
            "secondary_color": secondary_color,
            "outline_color": outline_color,
            "back_color": back_color,
            "outline_width": outline_width,
            "shadow_depth": shadow_depth,
            "alignment": alignment,
            "margin_v": margin_v,
            "pop_up_scale": pop_up_scale,
            "highlight_mode": highlight_mode,
            "back_box_enabled": back_box_enabled,
            "display_mode": display_mode,
            "max_words_per_line": max_words_per_line,
            "uppercase": uppercase,
            "letter_spacing": letter_spacing,
            "line_spacing": line_spacing,
            "background_opacity": background_opacity,
            "glow_intensity": glow_intensity,
            "rotation_angle": rotation_angle,
            "margin_h": margin_h
        }

        # 3. حفظ ملف الـ JSON
        file_path = os.path.join(PRESETS_DIR, f"{name}.json")
        with open(file_path, "w", encoding="utf-8") as f:
            json.dump(preset_dict, f, indent=4)

        return {
            "status": "success",
            "message": f"Preset '{name}' saved successfully.",
            "data": preset_dict
        }
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Failed to save preset: {str(e)}")

@router.get("/list", summary="List all saved presets")
async def list_presets():
    if not os.path.exists(PRESETS_DIR):
        return []
    return [f.replace(".json", "") for f in os.listdir(PRESETS_DIR) if f.endswith(".json")]

@router.delete("/delete/{name}", summary="Delete a preset")
async def delete_preset(name: str):
    file_path = os.path.join(PRESETS_DIR, f"{name}.json")
    if os.path.exists(file_path):
        os.remove(file_path)
        return {"status": "success", "message": f"Preset '{name}' deleted."}
    raise HTTPException(status_code=404, detail="Preset not found")

def load_preset_by_name(name: str) -> Optional[SubtitlePreset]:
    """Helper function to load a preset for processing"""
    file_path = os.path.join(PRESETS_DIR, f"{name}.json")
    if os.path.exists(file_path):
        with open(file_path, "r", encoding="utf-8") as f:
            data = json.load(f)
            return SubtitlePreset(**data)
    return None