import os
import shutil
import tempfile
import gradio as gr
import plotly.graph_objects as go

import pandas as pd
from time import time
from utils import (
    create_file_structure,
    init_info_csv,
    add_to_info_csv,
)

from satseg.dataset import create_datasets, create_inference_dataset
from satseg.model import train_model, save_model, run_inference, load_model
from satseg.seg_result import combine_seg_maps, get_combined_map_contours
from satseg.geo_tools import (
    shapefile_to_latlong,
    shapefile_to_grid_indices,
    points_to_shapefile,
    contours_to_shapefile,
    get_tif_n_channels,
)

DATA_DIR = "data"
MODEL_DIR = os.path.join(DATA_DIR, "models")
TIF_DIR = os.path.join(DATA_DIR, "tifs")
MASK_DIR = os.path.join(DATA_DIR, "masks")
INFO_DIR = os.path.join(DATA_DIR, "info")

MODEL_INFO_PATH = os.path.join(INFO_DIR, "model_data.csv")
DATASET_TIF_INFO_PATH = os.path.join(INFO_DIR, "dataset_tif_data.csv")
DATASET_MASK_INFO_PATH = os.path.join(INFO_DIR, "dataset_mask_data.csv")

create_file_structure(
    [DATA_DIR, TIF_DIR, MASK_DIR, INFO_DIR],
    [MODEL_INFO_PATH, DATASET_TIF_INFO_PATH, DATASET_MASK_INFO_PATH],
)
init_info_csv(
    MODEL_INFO_PATH,
    [
        "Name",
        "Architecture",
        "# of channels",
        "Train TIF",
        "Train Mask",
        "Expression",
        "Path",
    ],
)
init_info_csv(DATASET_TIF_INFO_PATH, ["Name", "# of channels", "Path"])
init_info_csv(DATASET_MASK_INFO_PATH, ["Name", "Class", "Path"])


def gr_train_model(
    tif_names, mask_names, model_name, expression, progress=gr.Progress()
):
    tif_paths = list(map(lambda x: os.path.join(TIF_DIR, x), tif_names))
    mask_paths = list(map(lambda x: os.path.join(MASK_DIR, x), mask_names))
    expression = expression.strip().split()

    # if arch.lower() == "best":
    #     arch = "dcama" if len(train_set) > 8 and len(train_set) < 20 else "unet"
    # ( c6 - c0 ) / ( c6 + c0 ) =
    progress(0, desc="Creating Dataset...")
    with tempfile.TemporaryDirectory() as tempdir:
        train_set, val_set = create_datasets(
            tif_paths, mask_paths, tempdir, expression=expression
        )
        progress(0.05, desc="Training Model...")
        model, _ = train_model(train_set, val_set, "unet")

    progress(0.95, desc="Model Trained! Saving...")
    model_name = "_".join(model_name.split()) + ".pt"
    model_path = os.path.join(MODEL_DIR, model_name)
    save_model(model, model_path)
    add_to_info_csv(
        MODEL_INFO_PATH,
        [
            model_name,
            "UNet",
            val_set.n_channels,
            ";".join(tif_names),
            ";".join(mask_names),
            " ".join(expression),
            model_path,
        ],
    )
    progress(1.0, desc="Done!")
    model_df = pd.read_csv(MODEL_INFO_PATH)

    return "Done!", model_df, gr.Dropdown.update(choices=model_df["Name"].to_list())


def gr_run_inference(tif_names, model_name, progress=gr.Progress()):
    t = time()
    tif_paths = list(map(lambda x: os.path.join(TIF_DIR, x), tif_names))
    model_df = pd.read_csv(MODEL_INFO_PATH, index_col="Name")
    model_path = model_df["Path"][model_name]

    with tempfile.TemporaryDirectory() as tempdir:
        progress(0, desc="Creating Dataset...")
        dataset = create_inference_dataset(
            tif_paths,
            tempdir,
            256,
            expression=model_df["Expression"][model_name].split(),
        )
        progress(0.1, desc="Loading Model...")
        model = load_model(model_path)

        result_dir = os.path.join(tempdir, "infer")
        comb_result_dir = os.path.join(tempdir, "comb")
        os.makedirs(result_dir)
        os.makedirs(comb_result_dir)
        progress(0.2, desc="Running Inference...")
        run_inference(dataset, model, result_dir)
        progress(0.8, desc="Preparing output...")
        combine_seg_maps(result_dir, comb_result_dir)
        results = get_combined_map_contours(comb_result_dir)

    file_paths = []
    out_dir = os.path.join(MASK_DIR, "output")
    if os.path.exists(out_dir):
        shutil.rmtree(out_dir)
    os.makedirs(out_dir)
    for tif_name, (contours, hierarchy) in results.items():
        tif_path = os.path.join(TIF_DIR, f"{tif_name}.tif")
        mask_path = os.path.join(out_dir, f"{tif_name}_mask.shp")
        zip_path = contours_to_shapefile(contours, hierarchy, tif_path, mask_path)
        file_paths.append(zip_path)
    print(time() - t, "seconds")
    return file_paths


def gr_save_mask_file(file_objs, filenames, obj_class):
    print("Saving file(s)...")
    idx = 0
    for filename in filenames.split(";"):
        if filename.strip() == "":
            continue

        filepath = os.path.join(MASK_DIR, filename.strip())
        obj = file_objs[idx]
        idx += 1

        shutil.move(obj.name, filepath)
        if filename.endswith(".shp"):
            add_to_info_csv(DATASET_MASK_INFO_PATH, [filename, obj_class, filepath])
    print("Done!")

    dataset_df = pd.read_csv(DATASET_MASK_INFO_PATH)
    choices = dataset_mask_df["Name"].to_list()
    update = gr.Dropdown.update(choices=choices)

    return dataset_df, update, update


def gr_save_tif_file(file_objs, filenames):
    print("Saving file(s)...")
    idx = 0
    for filename in filenames.split(";"):
        if filename.strip() == "":
            continue

        filepath = os.path.join(TIF_DIR, filename.strip())
        obj = file_objs[idx]
        idx += 1

        shutil.copy2(obj.name, filepath)
        n = get_tif_n_channels(filepath)
        add_to_info_csv(DATASET_TIF_INFO_PATH, [filename, n, filepath])
    print("Done!")

    dataset_df = pd.read_csv(DATASET_TIF_INFO_PATH)
    choices = dataset_mask_df["Name"].to_list()
    update = gr.Dropdown.update(choices=choices)

    return dataset_df, update, update


def gr_generate_map(mask_name: str, token: str = "", show_grid=True, show_mask=False):
    mask_path = os.path.join(MASK_DIR, mask_name)
    # token = "pk.eyJ1IjoiZGlsaXRoIiwiYSI6ImNsaDQ3NXF3ZDAxdDMzZXMxeWJic2h1cDQifQ.DDczQCDfTgQEUt6pGvjUAg"
    center = (7.753769, 80.691730)

    scattermaps = []
    if show_grid:
        indices = shapefile_to_grid_indices(mask_path)
        points_to_shapefile(indices, mask_path[: -len(".shp")] + "-grid.shp")
        scattermaps.append(
            go.Scattermapbox(
                lat=indices[:, 1],
                lon=indices[:, 0],
                mode="markers",
                marker=go.scattermapbox.Marker(size=6),
            )
        )
    if show_mask:
        contours = shapefile_to_latlong(mask_path)
        for contour in contours[38:39]:
            lons = contour[:, 0]
            lats = contour[:, 1]
            scattermaps.append(
                go.Scattermapbox(
                    fill="toself",
                    lat=lats,
                    lon=lons,
                    mode="markers",
                    marker=go.scattermapbox.Marker(size=6),
                )
            )

    fig = go.Figure(scattermaps)

    if token:
        fig.update_layout(
            mapbox=dict(
                style="satellite-streets",
                accesstoken=token,
                center=go.layout.mapbox.Center(lat=center[0], lon=center[1]),
                pitch=0,
                zoom=7,
            ),
            mapbox_layers=[
                {
                    # "below": "traces",
                    "sourcetype": "raster",
                    "sourceattribution": "United States Geological Survey",
                    "source": [
                        "https://basemap.nationalmap.gov/arcgis/rest/services/USGSImageryOnly/MapServer/tile/{z}/{y}/{x}"
                    ],
                }
            ],
        )
    else:
        fig.update_layout(
            mapbox_style="open-street-map",
            hovermode="closest",
            mapbox=dict(
                bearing=0,
                center=go.layout.mapbox.Center(lat=center[0], lon=center[1]),
                pitch=0,
                zoom=7,
            ),
        )

    return fig


with gr.Blocks() as demo:
    gr.Markdown(
        """# SatSeg
        Train models and run inference for segmentation of multispectral satellite images."""
    )

    model_df = pd.read_csv(MODEL_INFO_PATH)
    dataset_tif_df = pd.read_csv(DATASET_TIF_INFO_PATH)
    dataset_mask_df = pd.read_csv(DATASET_MASK_INFO_PATH)

    with gr.Tab("Train"):
        train_tif_names = gr.Dropdown(
            label="TIF Files",
            choices=dataset_tif_df["Name"].to_list(),
            multiselect=True,
        )
        train_mask_names = gr.Dropdown(
            label="Mask files",
            choices=dataset_mask_df["Name"].to_list(),
            multiselect=True,
        )
        train_rs_index = gr.Textbox(
            label="Remote Sensing Index", placeholder="( c0 + c1 ) / ( c0 - c1 ) ="
        )
        # train_arch = gr.Dropdown(
        #     label="Model Architecture", choices=["Best", "UNet", "DCAMA"], value="Best"
        # )
        train_model_name = gr.Textbox(
            label="Model Name", placeholder="Give the model a name"
        )
        train_button = gr.Button("Train")

        train_completion = gr.Text(label="Training Status", value="Not Started")

    with gr.Tab("Infer"):
        infer_tif_names = gr.Dropdown(
            label="TIF Files",
            choices=dataset_tif_df["Name"].to_list(),
            multiselect=True,
        )
        infer_model_name = gr.Dropdown(
            label="Model Name",
            choices=model_df["Name"].to_list(),
        )
        infer_button = gr.Button("Infer")

        infer_mask = gr.Files(label="Output Shapefile", interactive=False)

    # with gr.Tab("Sampling"):
    #     grid_mask_name = gr.Dropdown(
    #         label="Mask",
    #         choices=dataset_mask_df["Name"].to_list(),
    #     )

    #     grid_token = gr.Textbox(
    #         value="", label="Mapbox Token (https://account.mapbox.com/)"
    #     )
    #     grid_side_len = gr.Textbox(value="100", label="Sampling Gap (m)")

    #     grid_show_grid = gr.Checkbox(True, label="Show Grid")
    #     grid_show_mask = gr.Checkbox(False, label="Show Mask")

    #     grid_button = gr.Button("Generate Grid")

    #     grid_map = gr.Plot(label="Plot")

    with gr.Tab("Datasets"):
        dataset_tif_df = pd.read_csv(DATASET_TIF_INFO_PATH)
        dataset_mask_df = pd.read_csv(DATASET_MASK_INFO_PATH)

        datasets_upload_tif = gr.File(label="Images (.tif)", file_count="multiple")
        datasets_upload_tif_name = gr.Textbox(
            label="TIF name", placeholder="tif_file_1.tif;tif_file_2.tif"
        )
        datasets_save_uploaded_tif = gr.Button("Save")

        datasets_upload_mask = gr.File(
            label="Masks (Please upload all extensions (.shp, .shx, etc.))",
            file_count="multiple",
        )
        datasets_upload_mask_name = gr.Textbox(
            label="Mask name", placeholder="mask_1.shp;mask_1.shx"
        )
        datasets_mask_class_name = gr.Textbox(
            label="Class (The name of the object you want to segment)"
        )
        datasets_save_uploaded_mask = gr.Button("Save")

        datasets_tif_table = gr.Dataframe(dataset_tif_df, label="TIFs")
        datasets_mask_table = gr.Dataframe(dataset_mask_df, label="Masks")

    with gr.Tab("Models"):
        models_table = gr.Dataframe(model_df)

    train_button.click(
        gr_train_model,
        inputs=[
            train_tif_names,
            train_mask_names,
            # train_arch,
            train_model_name,
            train_rs_index,
        ],
        outputs=[train_completion, models_table, infer_model_name],
    )

    infer_button.click(
        gr_run_inference,
        inputs=[infer_tif_names, infer_model_name],
        outputs=[infer_mask],
    )

    datasets_upload_tif.upload(
        lambda y: ";".join(list(map(lambda x: os.path.basename(x.orig_name), y))),
        inputs=datasets_upload_tif,
        outputs=datasets_upload_tif_name,
    )

    datasets_upload_mask.upload(
        lambda y: ";".join(list(map(lambda x: os.path.basename(x.orig_name), y))),
        inputs=datasets_upload_mask,
        outputs=datasets_upload_mask_name,
    )

    # grid_button.click(
    #     gr_generate_map,
    #     inputs=[grid_mask_name, grid_token, grid_show_grid, grid_show_mask],
    #     outputs=grid_map,
    # )

    datasets_save_uploaded_tif.click(
        gr_save_tif_file,
        inputs=[datasets_upload_tif, datasets_upload_tif_name],
        outputs=[datasets_tif_table, train_tif_names, infer_tif_names],
    )
    datasets_save_uploaded_mask.click(
        gr_save_mask_file,
        inputs=[
            datasets_upload_mask,
            datasets_upload_mask_name,
            datasets_mask_class_name,
        ],
        outputs=[datasets_mask_table, train_mask_names],
    )

demo.queue(concurrency_count=10).launch(debug=True)