from PIL import Image
import gradio as gr
from modules import scripts_postprocessing, shared
from modules.ui_components import ToolButton
import modules.ui_symbols as symbols


class ScriptPostprocessingUpscale(scripts_postprocessing.ScriptPostprocessing):
    name = "Upscale"
    order = 1000

    def ui(self):
        with gr.Accordion('Postprocess upscale', open = False, elem_id="postprocess_upscale_accordion"):
            selected_tab = gr.State(value=0) # pylint: disable=abstract-class-instantiated
            with gr.Column():
                with gr.Row(elem_id="extras_upscale"):
                    with gr.Tabs(elem_id="extras_resize_mode"):
                        with gr.TabItem('Scale by', elem_id="extras_scale_by_tab") as tab_scale_by:
                            upscaling_resize = gr.Slider(minimum=0.1, maximum=8.0, step=0.05, label="Resize", value=2.0, elem_id="extras_upscaling_resize")

                        with gr.TabItem('Scale to', elem_id="extras_scale_to_tab") as tab_scale_to:
                            with gr.Row():
                                with gr.Row(elem_id="upscaling_column_size"):
                                    upscaling_resize_w = gr.Slider(minimum=64, maximum=4096, step=8, label="Width", value=1024, elem_id="extras_upscaling_resize_w")
                                    upscaling_resize_h = gr.Slider(minimum=64, maximum=4096, step=8, label="Height", value=1024, elem_id="extras_upscaling_resize_h")
                                    upscaling_res_switch_btn = ToolButton(value=symbols.switch, elem_id="upscaling_res_swap")
                                    upscaling_crop = gr.Checkbox(label='Crop to fit', value=True, elem_id="extras_upscaling_crop")

                with gr.Row():
                    extras_upscaler_1 = gr.Dropdown(label='Upscaler', elem_id="extras_upscaler_1", choices=[x.name for x in shared.sd_upscalers], value=shared.sd_upscalers[0].name)

                with gr.Row():
                    extras_upscaler_2 = gr.Dropdown(label='Refine upscaler', elem_id="extras_upscaler_2", choices=[x.name for x in shared.sd_upscalers], value=shared.sd_upscalers[0].name)
                    extras_upscaler_2_visibility = gr.Slider(minimum=0.0, maximum=1.0, step=0.001, label="Blend strength", value=0.0, elem_id="extras_upscaler_2_visibility")

            upscaling_res_switch_btn.click(lambda w, h: (h, w), inputs=[upscaling_resize_w, upscaling_resize_h], outputs=[upscaling_resize_w, upscaling_resize_h], show_progress=False)
            tab_scale_by.select(fn=lambda: 0, inputs=[], outputs=[selected_tab])
            tab_scale_to.select(fn=lambda: 1, inputs=[], outputs=[selected_tab])

            return {
                "upscale_mode": selected_tab,
                "upscale_by": upscaling_resize,
                "upscale_to_width": upscaling_resize_w,
                "upscale_to_height": upscaling_resize_h,
                "upscale_crop": upscaling_crop,
                "upscaler_1_name": extras_upscaler_1,
                "upscaler_2_name": extras_upscaler_2,
                "upscaler_2_visibility": extras_upscaler_2_visibility,
            }

    def upscale(self, image, info, upscaler, upscale_mode, upscale_by,  upscale_to_width, upscale_to_height, upscale_crop):
        if upscale_mode == 1:
            upscale_by = max(upscale_to_width/image.width, upscale_to_height/image.height)
            info["Postprocess upscale to"] = f"{upscale_to_width}x{upscale_to_height}"
        else:
            info["Postprocess upscale by"] = upscale_by
        image = upscaler.scaler.upscale(image, upscale_by, upscaler.name)
        if upscale_mode == 1 and upscale_crop:
            cropped = Image.new("RGB", (upscale_to_width, upscale_to_height))
            cropped.paste(image, box=(upscale_to_width // 2 - image.width // 2, upscale_to_height // 2 - image.height // 2))
            image = cropped
            info["Postprocess crop to"] = f"{image.width}x{image.height}"
        return image

    def process(self, pp: scripts_postprocessing.PostprocessedImage, upscale_mode=1, upscale_by=2.0, upscale_to_width=None, upscale_to_height=None, upscale_crop=False, upscaler_1_name=None, upscaler_2_name=None, upscaler_2_visibility=0.0): # pylint: disable=arguments-differ

        if upscaler_1_name == "None":
            upscaler_1_name = None
        upscaler1 = next(iter([x for x in shared.sd_upscalers if x.name == upscaler_1_name]), None)
        if not upscaler1:
            if upscaler_1_name is not None:
                shared.log.warning(f"Could not find upscaler: {upscaler_1_name or '<empty string>'}")
            return
        upscaled_image = self.upscale(pp.image, pp.info, upscaler1, upscale_mode, upscale_by, upscale_to_width, upscale_to_height, upscale_crop)
        pp.info["Postprocess upscaler"] = upscaler1.name

        if upscaler_2_name == "None":
            upscaler_2_name = None
        upscaler2 = next(iter([x for x in shared.sd_upscalers if x.name == upscaler_2_name and x.name != "None"]), None)
        if not upscaler2 and (upscaler_2_name is not None):
            shared.log.warning(f"Could not find upscaler: {upscaler_2_name or '<empty string>'}")
        if upscaler2 and upscaler_2_visibility > 0:
            second_upscale = self.upscale(pp.image, pp.info, upscaler2, upscale_mode, upscale_by, upscale_to_width, upscale_to_height, upscale_crop)
            upscaled_image = Image.blend(upscaled_image, second_upscale, upscaler_2_visibility)
            pp.info["Postprocess upscaler 2"] = upscaler2.name

        pp.image = upscaled_image

    def image_changed(self):
        pass


class ScriptPostprocessingUpscaleSimple(ScriptPostprocessingUpscale):
    name = "Simple Upscale"
    order = 900

    def ui(self):
        with gr.Row():
            upscaler_name = gr.Dropdown(label='Upscaler', choices=[x.name for x in shared.sd_upscalers], value=shared.sd_upscalers[0].name)
            upscale_by = gr.Slider(minimum=0.05, maximum=8.0, step=0.05, label="Upscale by", value=2)
        return {
            "upscale_by": upscale_by,
            "upscaler_name": upscaler_name,
        }

    def process(self, pp: scripts_postprocessing.PostprocessedImage, upscale_by=2.0, upscaler_name=None): # pylint: disable=arguments-differ
        if upscaler_name is None or upscaler_name == "None":
            return
        upscaler1 = next(iter([x for x in shared.sd_upscalers if x.name == upscaler_name]), None)
        if upscaler1 is None:
            shared.log.debug(f"Upscaler not found: {upscaler_name}")
        pp.image = self.upscale(pp.image, pp.info, upscaler1, 0, upscale_by, 0, 0, False)
        pp.info["Postprocess upscaler"] = upscaler1.name
