#!/usr/bin/env python3
"""Regenerates the committed vector/SLD fixtures in test/acceptance/data/.

The fixtures are committed, so this script is only needed to rebuild them.
Requires the GDAL command-line tool ogr2ogr (GeoPackage conversion).

    python3 test/acceptance/lib/make_fixtures.py

Values are deterministic: district KATO codes and names come from
stubs/districts.geojson (14 districts of North Kazakhstan region), the
indicator values follow a fixed formula, so re-running yields identical files.
"""
import json
import os
import subprocess
import sys
import tempfile

HERE = os.path.dirname(os.path.abspath(__file__))
ROOT = os.path.abspath(os.path.join(HERE, "..", "..", ".."))
DATA = os.path.abspath(os.path.join(HERE, "..", "data"))


def ring_bbox(coords):
    xs, ys = [], []

    def walk(c):
        if isinstance(c[0], (int, float)):
            xs.append(c[0])
            ys.append(c[1])
        else:
            for x in c:
                walk(x)

    walk(coords)
    return min(xs), min(ys), max(xs), max(ys)


def population(i, kato, year):
    # Values quoted in the protocol (Приложение 7, F16/F17) are kept verbatim.
    fixed = {
        ("591000000", 2022): 47567.6,
        ("591000000", 2023): 48311.2,
        ("591000000", 2024): 49120.5,
        ("595000000", 2022): 46862.7,
        ("595000000", 2023): 48268.6,
        ("595000000", 2024): 49205.8,
    }
    if (kato, year) in fixed:
        return fixed[(kato, year)]
    return round(20000 + 1750.3 * i + 812.4 * (year - 2022) + (i * 37 % 11) * 13.1, 1)


def livestock(i, year):
    return int(30000 + 2311 * i + 977 * (year - 2022) + (i * 53 % 17) * 41)


def main():
    with open(os.path.join(ROOT, "stubs", "districts.geojson"), encoding="utf-8") as f:
        districts = json.load(f)["features"]
    os.makedirs(DATA, exist_ok=True)

    # 1. plain vector: 4 plot polygons spanning lon 69.0..71.7, lat 53.6..55.0
    plots = []
    boxes = [
        (69.0, 53.6, 69.6, 54.0),
        (69.9, 54.2, 70.5, 54.7),
        (70.6, 53.7, 71.1, 54.1),
        (71.2, 54.5, 71.7, 55.0),
    ]
    for n, (x0, y0, x1, y1) in enumerate(boxes, 1):
        plots.append({
            "type": "Feature",
            "properties": {"plot_id": n, "name": "Участок %d" % n, "area_ha": round((x1 - x0) * (y1 - y0) * 7000, 1)},
            "geometry": {"type": "Polygon", "coordinates": [[[x0, y0], [x1, y0], [x1, y1], [x0, y1], [x0, y0]]]},
        })
    write_json("plots_nko.geojson", {"type": "FeatureCollection", "features": plots})

    # 2. vector_with_kato (GeoJSON): population per district, Y2022..Y2024
    pop = []
    live = []
    for i, d in enumerate(districts):
        p = d["properties"]
        kato = str(p["kato"])
        x0, y0, x1, y1 = ring_bbox(d["geometry"]["coordinates"])
        pt = {"type": "Point", "coordinates": [round((x0 + x1) / 2, 5), round((y0 + y1) / 2, 5)]}
        props = {"kato": kato, "district": p["name_ru"]}
        for y in (2022, 2023, 2024):
            props["Y%d" % y] = population(i, kato, y)
        pop.append({"type": "Feature", "properties": props, "geometry": pt})
        lprops = {"KATO_CODE": kato, "district": p["name_ru"]}
        for y in (2022, 2023, 2024):
            lprops["H_%d" % y] = livestock(i, y)
        live.append({"type": "Feature", "properties": lprops, "geometry": pt})
    write_json("population_kato.geojson", {"type": "FeatureCollection", "features": pop})

    # 3. vector_with_kato (GeoPackage): cattle per district, H_2022..H_2024
    with tempfile.TemporaryDirectory() as tmp:
        src = os.path.join(tmp, "livestock.geojson")
        with open(src, "w", encoding="utf-8") as f:
            json.dump({"type": "FeatureCollection", "features": live}, f, ensure_ascii=False)
        dst = os.path.join(DATA, "livestock_kato.gpkg")
        if os.path.exists(dst):
            os.remove(dst)
        subprocess.run(["ogr2ogr", "-f", "GPKG", "-nln", "livestock", "-a_srs", "EPSG:4326", dst, src], check=True)

    # 4. SLD styles
    write_text("style.sld", sld("ndvi", "NDVI gradient", [("0.0", "#a50026"), ("0.5", "#ffffbf"), ("1.0", "#006837")]))
    write_text("group_style.sld", sld("group", "Group fallback style", [("0", "#f7fbff"), ("100000", "#08306b")]))
    write_text("style.txt", "not an SLD file\n")
    print("fixtures written to", DATA)


def sld(name, title, stops):
    entries = "\n".join(
        '            <sld:ColorMapEntry color="%s" quantity="%s"/>' % (c, q) for q, c in stops)
    return """<?xml version="1.0" encoding="UTF-8"?>
<sld:StyledLayerDescriptor version="1.0.0" xmlns:sld="http://www.opengis.net/sld" xmlns:ogc="http://www.opengis.net/ogc">
  <sld:NamedLayer>
    <sld:Name>%s</sld:Name>
    <sld:UserStyle>
      <sld:Title>%s</sld:Title>
      <sld:FeatureTypeStyle>
        <sld:Rule>
          <sld:RasterSymbolizer>
            <sld:ColorMap>
%s
            </sld:ColorMap>
          </sld:RasterSymbolizer>
        </sld:Rule>
      </sld:FeatureTypeStyle>
    </sld:UserStyle>
  </sld:NamedLayer>
</sld:StyledLayerDescriptor>
""" % (name, title, entries)


def write_json(name, obj):
    with open(os.path.join(DATA, name), "w", encoding="utf-8") as f:
        json.dump(obj, f, ensure_ascii=False, indent=1)
        f.write("\n")


def write_text(name, text):
    with open(os.path.join(DATA, name), "w", encoding="utf-8") as f:
        f.write(text)


if __name__ == "__main__":
    sys.exit(main())