import os

from PIL import Image

from modules import shared, images, devices, scripts, scripts_postprocessing, ui_common, generation_parameters_copypaste
from modules.shared import opts


def run_postprocessing(extras_mode, image, image_folder, input_dir, output_dir, show_extras_results, *args, save_output: bool = True):
    devices.torch_gc()

    shared.state.begin(job="extras")

    outputs = []

    def get_images(extras_mode, image, image_folder, input_dir):
        if extras_mode == 1:
            for img in image_folder:
                if isinstance(img, Image.Image):
                    image = img
                    fn = ''
                else:
                    image = Image.open(os.path.abspath(img.name))
                    fn = os.path.splitext(img.orig_name)[0]
                yield image, fn
        elif extras_mode == 2:
            assert not shared.cmd_opts.hide_ui_dir_config, '--hide-ui-dir-config option must be disabled'
            assert input_dir, 'input directory not selected'

            image_list = shared.listfiles(input_dir)
            for filename in image_list:
                try:
                    image = Image.open(filename)
                except Exception:
                    continue
                yield image, filename
        else:
            assert image, 'image not selected'
            yield image, None

    if extras_mode == 2 and output_dir != '':
        outpath = output_dir
    else:
        outpath = opts.outdir_samples or opts.outdir_extras_samples

    infotext = ''

    for image_data, name in get_images(extras_mode, image, image_folder, input_dir):
        image_data: Image.Image

        shared.state.textinfo = name

        parameters, existing_pnginfo = images.read_info_from_image(image_data)
        if parameters:
            existing_pnginfo["parameters"] = parameters

        pp = scripts_postprocessing.PostprocessedImage(image_data.convert("RGB"))

        scripts.scripts_postproc.run(pp, args)

        if opts.use_original_name_batch and name is not None:
            basename = os.path.splitext(os.path.basename(name))[0]
        else:
            basename = ''

        infotext = ", ".join([k if k == v else f'{k}: {generation_parameters_copypaste.quote(v)}' for k, v in pp.info.items() if v is not None])

        if opts.enable_pnginfo:
            pp.image.info = existing_pnginfo
            pp.image.info["postprocessing"] = infotext

        if save_output:
            images.save_image(pp.image, path=outpath, basename=basename, seed=None, prompt=None, extension=opts.samples_format, info=infotext, short_filename=True, no_prompt=True, grid=False, pnginfo_section_name="extras", existing_info=existing_pnginfo, forced_filename=None)

        if extras_mode != 2 or show_extras_results:
            outputs.append(pp.image)

        image_data.close()

    devices.torch_gc()

    return outputs, ui_common.plaintext_to_html(infotext), ''


def run_extras(extras_mode, resize_mode, image, image_folder, input_dir, output_dir, show_extras_results, gfpgan_visibility, codeformer_visibility, codeformer_weight, upscaling_resize, upscaling_resize_w, upscaling_resize_h, upscaling_crop, extras_upscaler_1, extras_upscaler_2, extras_upscaler_2_visibility, upscale_first: bool, save_output: bool = True):
    """old handler for API"""

    args = scripts.scripts_postproc.create_args_for_run({
        "Upscale": {
            "upscale_mode": resize_mode,
            "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,
        },
        "GFPGAN": {
            "gfpgan_visibility": gfpgan_visibility,
        },
        "CodeFormer": {
            "codeformer_visibility": codeformer_visibility,
            "codeformer_weight": codeformer_weight,
        },
    })

    return run_postprocessing(extras_mode, image, image_folder, input_dir, output_dir, show_extras_results, *args, save_output=save_output)
