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import os
import io

import matplotlib
matplotlib.use("Agg")  # ๋ฐฑ์—”๋“œ Agg๋กœ ๊ณ ์ •

import geopandas as gpd
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
import contextily as ctx
from shapely.geometry import Point
from shapely import wkt as shp_wkt
from PIL import Image

import gradio as gr

# -------------------- ๊ฒฝ๋กœ ์„ค์ • --------------------
SHP_PATH = r"C:\Users\USER\iCloudDrive\์ธํ•˜๋Œ€ํ•™๊ต\5ํ•™๋…„ 1ํ•™๊ธฐ\ํ‘œ๋ณธ๋ก  ๋ฐ ์‹ค์Šต\TeamProject\Data\inha_boundary.shp"
CSV_PATH = r"C:\Users\USER\iCloudDrive\์ธํ•˜๋Œ€ํ•™๊ต\5ํ•™๋…„ 1ํ•™๊ธฐ\ํ‘œ๋ณธ๋ก  ๋ฐ ์‹ค์Šต\TeamProject\๋ฐ์ดํ„ฐ ์ˆ˜์ง‘\์ธก์ •๊ฒฐ๊ณผ.csv"

# ์ด๋ฏธ์ง€ ํ•ด์ƒ๋„(ํ”ฝ์…€)
IMG_W, IMG_H = 1200, 900

# -------------------- ์บ ํผ์Šค ๊ฒฝ๊ณ„ ์ค€๋น„ --------------------
gdf_boundary_4326 = gpd.read_file(SHP_PATH).to_crs(epsg=4326)
gdf_boundary_3857 = gdf_boundary_4326.to_crs(epsg=3857)

# DeprecationWarning ํ”ผํ•˜๊ธฐ ์œ„ํ•ด union_all ์šฐ์„  ์‚ฌ์šฉ
try:
    poly_3857 = gdf_boundary_3857.geometry.union_all()
except AttributeError:
    poly_3857 = gdf_boundary_3857.geometry.unary_union

if poly_3857.geom_type == "MultiPolygon":
    poly_3857 = max(poly_3857.geoms, key=lambda g: g.area)

BOUND_MINX, BOUND_MINY, BOUND_MAXX, BOUND_MAXY = poly_3857.bounds

# -------------------- ์ดˆ๊ธฐ CSV ๋กœ๋”ฉ --------------------
# -------------------- ์ดˆ๊ธฐ CSV ๋กœ๋”ฉ --------------------
if os.path.exists(CSV_PATH):
    df_u = pd.read_csv(CSV_PATH, encoding="cp949")

    # ์ปฌ๋Ÿผ ์ •๋ฆฌ
    df_u.columns = [c.strip() for c in df_u.columns]
    df_u = df_u.loc[:, ~df_u.columns.str.contains("^Unnamed")]

    if {"lat", "lon", "dB"}.issubset(df_u.columns):
        # ์ด๋ฏธ lat/lon/dB ํ˜•์‹์ด๋ฉด ๊ทธ๋Œ€๋กœ ์‚ฌ์šฉ
        df_init = df_u[["lat", "lon", "dB"]].copy()
    elif "์œ„์น˜" in df_u.columns and "dB" in df_u.columns:
        # ์˜›๋‚  ํ˜•์‹: ์œ„์น˜(WKT), dB โ†’ lat/lon/dB๋กœ ๋ณ€ํ™˜
        pos_series = df_u["์œ„์น˜"].astype(str).str.strip()

        def safe_load_wkt(s):
            s_up = s.upper()
            if "POINT" not in s_up:
                return None
            try:
                return shp_wkt.loads(s)
            except Exception:
                return None

        geom = pos_series.apply(safe_load_wkt)
        mask = geom.notnull()

        if mask.any():
            geom_valid = geom[mask]
            lons = geom_valid.apply(lambda g: round(g.x, 7))
            lats = geom_valid.apply(lambda g: round(g.y, 7))
            dB_vals = pd.to_numeric(df_u.loc[mask, "dB"], errors="coerce")

            df_init = pd.DataFrame(
                {
                    "lat": lats.values,
                    "lon": lons.values,
                    "dB": dB_vals.values,
                }
            ).dropna(subset=["lat", "lon"])
        else:
            df_init = pd.DataFrame(columns=["lat", "lon", "dB"])
    else:
        # ํ˜•์‹์„ ์•Œ์•„๋ณผ ์ˆ˜ ์—†์œผ๋ฉด ๋นˆ DF
        df_init = pd.DataFrame(columns=["lat", "lon", "dB"])
else:
    df_init = pd.DataFrame(columns=["lat", "lon", "dB"])

# ํƒ€์ž… ๋ณด์ •
for col in ["lat", "lon", "dB"]:
    if col not in df_init.columns:
        df_init[col] = pd.Series(dtype=float)



# -------------------- ์ง€๋„ ์ด๋ฏธ์ง€ ์ƒ์„ฑ --------------------
def make_map_image(df_points: pd.DataFrame):
    """์บ ํผ์Šค ๊ฒฝ๊ณ„ + ์ €์žฅ๋œ ํฌ์ธํŠธ๋“ค์„ ๊ทธ๋ฆฐ PNG ์ด๋ฏธ์ง€๋ฅผ numpy ๋ฐฐ์—ด๋กœ ๋ฐ˜ํ™˜."""
    fig, ax = plt.subplots(
        figsize=(IMG_W / 100, IMG_H / 100), dpi=100
    )  # โ†’ ์ •ํ™•ํžˆ IMG_W x IMG_H ํ”ฝ์…€

    # ์บ ํผ์Šค ํด๋ฆฌ๊ณค (ํ…Œ๋‘๋ฆฌ๋งŒ)
    gdf_boundary_3857.plot(
        ax=ax,
        facecolor="none",
        edgecolor="darkblue",
        linewidth=2,
        alpha=1.0,
    )

    # ๋ฒ ์ด์Šค๋งต
    ctx.add_basemap(ax, source=ctx.providers.OpenStreetMap.Mapnik, alpha=0.7)

    # ์ €์žฅ๋œ ํฌ์ธํŠธ ์ฐ๊ธฐ
    df_points = df_points.dropna(subset=["lat", "lon"])
    if len(df_points) > 0:
        gdf_pts = gpd.GeoDataFrame(
            df_points.copy(),
            geometry=gpd.points_from_xy(df_points["lon"], df_points["lat"]),
            crs=4326,
        ).to_crs(epsg=3857)

        gdf_pts.plot(
            ax=ax,
            column="dB",
            cmap="viridis",
            markersize=40,
            edgecolor="black",
            linewidth=0.3,
            alpha=0.9,
            legend=False,
            zorder=5,
        )

    # ํด๋ฆฌ๊ณค bounds์— ๋”ฑ ๋งž๊ฒŒ
    ax.set_xlim(BOUND_MINX, BOUND_MAXX)
    ax.set_ylim(BOUND_MINY, BOUND_MAXY)
    ax.axis("off")

    # ์—ฌ๋ฐฑ ์ œ๊ฑฐํ•ด์„œ ์ „์ฒด ์บ”๋ฒ„์Šค๋ฅผ ์ง€๋„์— ๋งž์ถค
    plt.subplots_adjust(0, 0, 1, 1)

    # Figure -> PNG bytes -> PIL -> numpy
    buf = io.BytesIO()
    fig.savefig(buf, format="png", dpi=100)
    buf.seek(0)
    img = np.array(Image.open(buf))

    plt.close(fig)
    return img


# -------------------- ํ”ฝ์…€ โ†’ ์œ„๊ฒฝ๋„ ๋ณ€ํ™˜ --------------------
def pixel_to_latlon(x_px: int, y_px: int):
    """

    Gradio ์ด๋ฏธ์ง€ ํด๋ฆญ ์ขŒํ‘œ(ํ”ฝ์…€, (x, y))๋ฅผ

    EPSG:3857 โ†’ EPSG:4326(lat, lon)์œผ๋กœ ๋ณ€ํ™˜.

    """
    # x: [0, IMG_W] -> [BOUND_MINX, BOUND_MAXX]
    x_3857 = BOUND_MINX + (BOUND_MAXX - BOUND_MINX) * (x_px / IMG_W)
    # y: ์œ„๊ฐ€ 0, ์•„๋ž˜๊ฐ€ IMG_H โ†’ [BOUND_MAXY, BOUND_MINY]๋กœ ๋งคํ•‘
    y_3857 = BOUND_MAXY - (BOUND_MAXY - BOUND_MINY) * (y_px / IMG_H)

    g = gpd.GeoSeries([Point(x_3857, y_3857)], crs=3857).to_crs(epsg=4326)
    pt = g.iloc[0]
    lat, lon = pt.y, pt.x

    # ์—ฌ๊ธฐ์„œ ์†Œ์ˆ˜์  7์ž๋ฆฌ๋กœ ๋ฐ˜์˜ฌ๋ฆผ
    return round(float(lat), 7), round(float(lon), 7)


# -------------------- Gradio ์ฝœ๋ฐฑ --------------------
def on_map_click(img, df_state, evt: gr.SelectData):
    """์ด๋ฏธ์ง€ ํด๋ฆญ ์‹œ ์œ„๊ฒฝ๋„ ํ…์ŠคํŠธ ๋ฐ•์Šค ๊ฐฑ์‹ ."""
    if evt is None or evt.index is None:
        return None, None
    x, y = evt.index  # (x_px, y_px)
    lat, lon = pixel_to_latlon(x, y)
    return lat, lon  # ์ด๋ฏธ 7์ž๋ฆฌ๋กœ ๋ฐ˜์˜ฌ๋ฆผ๋œ ๊ฐ’


def add_point(lat, lon, db, df_state):
    """lat/lon/dB ์ถ”๊ฐ€ํ•˜๊ณ  CSV ์ €์žฅ + ์ง€๋„ ๊ฐฑ์‹ ."""
    if df_state is None or isinstance(df_state, dict):
        df_state = df_init.copy()

    if lat is None or lon is None or db is None:
        msg = "์œ„๋„/๊ฒฝ๋„/dB ์ž…๋ ฅ ์˜ค๋ฅ˜."
        return df_state, make_map_image(df_state), df_state, msg

    try:
        lat = float(lat)
        lon = float(lon)
        db = float(db)
    except ValueError:
        msg = "์ˆซ์ž ์˜ค๋ฅ˜."
        return df_state, make_map_image(df_state), df_state, msg

    # ์•ˆ์ „ํ•˜๊ฒŒ ํ•œ ๋ฒˆ ๋” 7์ž๋ฆฌ๋กœ ๋งž์ถค
    lat = round(lat, 7)
    lon = round(lon, 7)

    # ํด๋ฆฌ๊ณค ์•ˆ์ธ์ง€ ์ฒดํฌ
    pt = gpd.GeoSeries([Point(lon, lat)], crs=4326).to_crs(epsg=3857).iloc[0]
    if not poly_3857.contains(pt):
        msg = "์บ ํผ์Šค ๊ฒฝ๊ณ„ ๋ฐ–."
        return df_state, make_map_image(df_state), df_state, msg

    new_row = pd.DataFrame([{"lat": lat, "lon": lon, "dB": db}])
    new_df = pd.concat([df_state, new_row], ignore_index=True)

    os.makedirs(os.path.dirname(CSV_PATH), exist_ok=True)
    new_df[["lat", "lon", "dB"]].to_csv(CSV_PATH, index=False, encoding="cp949")

    # ๋ฉ”์‹œ์ง€๋„ 7์ž๋ฆฌ๋กœ
    msg = f"{len(new_df)}๊ฐœ ์  ์ €์žฅ๋จ (๋งˆ์ง€๋ง‰: lat={lat:.7f}, lon={lon:.7f}, dB={db:.1f})"
    return new_df, make_map_image(new_df), new_df, msg

def load_uploaded_csv(file, df_state):
    """

    CSV ์—…๋กœ๋“œ ์‹œ:

    - (์ผ€์ด์Šค A) '์œ„์น˜', 'dB' ์ปฌ๋Ÿผ์ด ์žˆ์œผ๋ฉด: ์œ„์น˜(WKT) -> lat/lon, dB ๊ทธ๋Œ€๋กœ

    - (์ผ€์ด์Šค B) 'lat', 'lon', 'dB' ์ปฌ๋Ÿผ์ด ์žˆ์œผ๋ฉด: ๊ทธ๋Œ€๋กœ ์‚ฌ์šฉ

    - ๋‘˜ ๋‹ค ์•„๋‹ˆ๋ฉด ์—๋Ÿฌ

    """
    if df_state is None or isinstance(df_state, dict):
        df_state = df_init.copy()

    if file is None:
        msg = "์—…๋กœ๋“œ๋œ ํŒŒ์ผ ์—†์Œ."
        return df_state, make_map_image(df_state), df_state, msg

    # CSV ์ฝ๊ธฐ (์ธ์ฝ”๋”ฉ ์‹œ๋„)
    try:
        df_u = pd.read_csv(file.name, encoding="cp949")
    except UnicodeDecodeError:
        df_u = pd.read_csv(file.name, encoding="utf-8")

    # ์ปฌ๋Ÿผ ์ด๋ฆ„ ๊ณต๋ฐฑ/Unnamed ์ •๋ฆฌ
    df_u.columns = [c.strip() for c in df_u.columns]
    df_u = df_u.loc[:, ~df_u.columns.str.contains("^Unnamed")]

    # ---------- ์ผ€์ด์Šค B: lat/lon/dB ํ˜•์‹ ----------
    if {"lat", "lon", "dB"}.issubset(df_u.columns):
        new_df = df_u[["lat", "lon", "dB"]].copy()
        # ์ˆซ์ž/๋ฐ˜์˜ฌ๋ฆผ ๋ณด์ •
        new_df["lat"] = pd.to_numeric(new_df["lat"], errors="coerce").round(7)
        new_df["lon"] = pd.to_numeric(new_df["lon"], errors="coerce").round(7)
        new_df["dB"] = pd.to_numeric(new_df["dB"], errors="coerce")
        new_df = new_df.dropna(subset=["lat", "lon"])

        df_merged = new_df.copy()

        os.makedirs(os.path.dirname(CSV_PATH), exist_ok=True)
        df_merged[["lat", "lon", "dB"]].to_csv(CSV_PATH, index=False, encoding="cp949")

        msg = f"lat/lon/dB ํ˜•์‹ CSV์—์„œ {len(df_merged)}๊ฐœ ์  ์ฝ์–ด์˜ด."
        return df_merged, make_map_image(df_merged), df_merged, msg

    # ---------- ์ผ€์ด์Šค A: ์œ„์น˜(WKT), dB ํ˜•์‹ ----------
    if "์œ„์น˜" in df_u.columns and "dB" in df_u.columns:
        pos_series = df_u["์œ„์น˜"].astype(str).str.strip()

        def safe_load_wkt(s):
            s_up = s.upper()
            if "POINT" not in s_up:
                return None
            try:
                return shp_wkt.loads(s)
            except Exception:
                return None

        geom = pos_series.apply(safe_load_wkt)
        mask = geom.notnull()

        if not mask.any():
            msg = "'์œ„์น˜' ์ปฌ๋Ÿผ์— ์œ ํšจํ•œ POINT WKT๊ฐ€ ์—†๋‹ค."
            return df_state, make_map_image(df_state), df_state, msg

        geom_valid = geom[mask]
        lons = geom_valid.apply(lambda g: round(g.x, 7))
        lats = geom_valid.apply(lambda g: round(g.y, 7))
        dB_vals = pd.to_numeric(df_u.loc[mask, "dB"], errors="coerce")

        new_df = pd.DataFrame(
            {
                "lat": lats.values,
                "lon": lons.values,
                "dB": dB_vals.values,
            }
        ).dropna(subset=["lat", "lon"])

        df_merged = new_df.copy()

        os.makedirs(os.path.dirname(CSV_PATH), exist_ok=True)
        df_merged[["lat", "lon", "dB"]].to_csv(CSV_PATH, index=False, encoding="cp949")

        msg = f"[์œ„์น˜, dB] ํ˜•์‹ CSV์—์„œ ์œ ํšจํ•œ ์  {len(df_merged)}๊ฐœ ์ฝ์–ด์˜ด."
        return df_merged, make_map_image(df_merged), df_merged, msg

    # ---------- ๋‘˜ ๋‹ค ์•„๋‹ˆ๋ฉด ----------
    msg = "CSV ํ˜•์‹์„ ์•Œ์•„๋ณผ ์ˆ˜ ์—†๋‹ค. (์œ„์น˜,dB ๋˜๋Š” lat,lon,dB ํ•„์š”)"
    return df_state, make_map_image(df_state), df_state, msg



# -------------------- Gradio ์•ฑ --------------------
def build_app():
    init_img = make_map_image(df_init)

    with gr.Blocks(title="์†Œ์Œ ์ธก์ • ๊ธฐ๋ก๊ธฐ") as demo:
        gr.Markdown(
            "## ์ธํ•˜๋Œ€ ์บ ํผ์Šค ์†Œ์Œ ์ธก์ •\n"
            "- ์ง€๋„ ์ด๋ฏธ์ง€ ํด๋ฆญ โ†’ ์œ„/๊ฒฝ๋„ ์ž๋™ ์ž…๋ ฅ โ†’ dB ์ €์žฅ\n"
            "- ๋˜๋Š” [์œ„์น˜, dB] CSV ์—…๋กœ๋“œํ•ด์„œ ํ•œ ๋ฒˆ์— ๋ณด์—ฌ์ฃผ๊ธฐ"
        )

        df_state = gr.State(df_init)

        with gr.Row():
            map_img = gr.Image(
                value=init_img,
                type="numpy",
                label=None,
                interactive=True,
            )

            with gr.Column():
                lat_box = gr.Number(label="์œ„๋„ (lat)", interactive=False)
                lon_box = gr.Number(label="๊ฒฝ๋„ (lon)", interactive=False)
                db_box = gr.Number(label="๋ฐ์‹œ๋ฒจ (dB)")

                add_btn = gr.Button("ํ˜„์žฌ ์ขŒํ‘œ ์ถ”๊ฐ€ + CSV ์ €์žฅ", variant="primary")
                csv_upload = gr.File(
                    label="CSV ์—…๋กœ๋“œ ([์œ„์น˜, dB] ํ˜•์‹)",
                    file_types=[".csv"],
                )

                status = gr.Markdown()

                table = gr.Dataframe(
                    value=df_init,
                    headers=["lat", "lon", "dB"],
                    label="์ €์žฅ๋œ ์ธก์ •๊ฐ’",
                    interactive=False,
                    wrap=True,
                )

        # ์ด๋ฏธ์ง€ ํด๋ฆญ ์‹œ: lat/lon ๊ฐฑ์‹ 
        map_img.select(
            fn=on_map_click,
            inputs=[map_img, df_state],
            outputs=[lat_box, lon_box],
        )

        # ๋ฒ„ํŠผ ํด๋ฆญ ์‹œ: DF/์ง€๋„/์ƒํƒœ ๊ฐฑ์‹  + CSV ์ €์žฅ
        add_btn.click(
            fn=add_point,
            inputs=[lat_box, lon_box, db_box, df_state],
            outputs=[table, map_img, df_state, status],
        )

        # CSV ์—…๋กœ๋“œ ์‹œ: ์—…๋กœ๋“œ ๋ฐ์ดํ„ฐ๋กœ ์ง€๋„/ํ…Œ์ด๋ธ”/์ƒํƒœ ๊ฐฑ์‹ 
        csv_upload.change(
            fn=load_uploaded_csv,
            inputs=[csv_upload, df_state],
            outputs=[table, map_img, df_state, status],
        )

    return demo


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