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import gradio as gr
import cv2
import numpy as np
from registry import registry
from filters import *
from components import create_filter_controls

def create_app():
    with gr.Blocks() as app:
        gr.Markdown("""
        # 📷 Photo Filter App
        ### Chỉnh sửa ảnh với các bộ lọc chuyên nghiệp
        """)
        
        # Khởi tạo components
        controls = create_filter_controls()
        filter_names = list(registry.filters.keys())
        filter_groups = controls

        with gr.Row():
            with gr.Column():
                input_image = gr.Image(
                    label="Ảnh gốc",
                    type="numpy"
                )
                
                filter_select = gr.Dropdown(
                    label="Chọn bộ lọc",
                    choices=filter_names,
                    value="Original"
                )
                
                # Các điều khiển bộ lọc
                control_components = []
                for filter_name, group in filter_groups.items():
                    for component in group.children:
                        control_components.append(component)
                
                apply_button = gr.Button("Áp dụng bộ lọc")
                filter_doc = gr.Markdown()

            with gr.Column():
                output_image = gr.Image(label="Ảnh đã chỉnh sửa")
                error_message = gr.Markdown(visible=False)

        # Xử lý cập nhật UI
        def update_controls(filter_name):
            updates = []
            for group_name, group in filter_groups.items():
                updates.append(gr.update(visible=group_name == filter_name))
            
            doc = registry.filters[filter_name].__doc__ or "Không có mô tả chi tiết."
            return updates + [doc]

        # Xử lý ảnh
        def process(image, filter_name, *args):
            if image is None:
                return None, gr.update(visible=True, value="⚠️ Vui lòng chọn ảnh trước khi áp dụng bộ lọc")
            
            try:
                image = cv2.cvtColor(image, cv2.COLOR_RGB2BGR)
                params = {}
                param_names = list(registry.params_map.get(filter_name, {}).keys())
                for i, param_name in enumerate(param_names):
                    params[param_name] = args[i]
                
                processed = registry.filters[filter_name](image, **params)
                
                if len(processed.shape) == 2:
                    processed = cv2.cvtColor(processed, cv2.COLOR_GRAY2RGB)
                else:
                    processed = cv2.cvtColor(processed, cv2.COLOR_BGR2RGB)
                
                return processed, gr.update(visible=False)
            except Exception as e:
                return None, gr.update(visible=True, value=f"❌ Lỗi xử lý ảnh: {str(e)}")

        # Kết nối sự kiện
        filter_select.change(
            update_controls,
            inputs=filter_select,
            outputs=list(filter_groups.values()) + [filter_doc],
            api_name=False
        )
        
        input_components = [input_image, filter_select] + control_components
        apply_button.click(
            process,
            inputs=input_components,
            outputs=[output_image, error_message],
        )

    return app

if __name__ == "__main__":
    app = create_app()
    app.launch(share=True)