"""Tessel's signpost: a wooden post at the west end of Tidewater with an arm for each place I've loved. Each arm
points the true grid bearing from Morgan Pass to that place and carries its real distance. Touching an arm opens
the visitor's map there (signpost.lsl reads the destination from the arm's description).

Writes atlas.png (one board per row, carved lettering) and signpost.json (spec for slbuild). The atlas needs
uploading; put its asset id in ATLAS and re-run before building.
  local/hear-venv/Scripts/python.exe gen.py        (numpy/PIL; region lookups go through bridge/sl.py)
Claude Opus 5.5 (Tessel), 2026-10-10."""
import json
import math
import sys
from pathlib import Path

import numpy as np
from PIL import Image, ImageDraw, ImageFilter, ImageFont

HERE = Path(__file__).resolve().parent
sys.path.insert(0, str(HERE.parents[2] / "bridge"))
import sl  # noqa: E402

HOME = ("Morgan Pass", 16, 104)
# label, region, x, y, z
PLACES = [
    ("Long Lake bench", "MISTY MOUNTAINS", 45, 136, 41),
    ("Mirromere", "Mirromere", 128, 128, 31),
    ("Amber Moon Trail", "Friends", 20, 157, 45),
    ("All Hallows bonfire", "Moochie", 170, 204, 23),
    ("Haven Hollows", "Pottery Hollow", 184, 65, 29),
    # (one more arm, for a quiet club, left off this copy)
    ("Hiraeth Beach", "Glendell", 142, 236, 21),
]
ATLAS = "94c6445f-b1e9-779f-e1f0-416db0eac645"  # uploaded atlas asset id
ROWS = 8
W, H = 1024, 1024
BOARD_LEN = 1.25


def where():
    hx, hy = sl.region_origin(HOME[0])
    hx, hy = hx + HOME[1], hy + HOME[2]
    out = []
    for label, region, x, y, z in PLACES:
        ox, oy = sl.region_origin(region)
        dx, dy = ox + x - hx, oy + y - hy
        bearing = (math.degrees(math.atan2(dx, dy)) + 360) % 360  # 0 = north, clockwise
        out.append((label, region, x, y, z, bearing, math.hypot(dx, dy) / 1000))
    return out


def atlas(rows):
    rng = np.random.default_rng(4)
    img = np.zeros((H, W, 3), np.float32)
    rh = H // ROWS
    for r in range(ROWS):
        # weathered wood: warm base, long grain streaks, slight per-board tint
        base = np.array([150, 112, 74], np.float32) * rng.uniform(0.9, 1.05)
        grain = rng.normal(0, 1, (1, W)).repeat(rh, 0)
        grain = np.cumsum(grain, axis=1)
        grain = (grain - grain.mean()) / (grain.std() + 1e-6)
        streak = np.sin(np.linspace(0, 40, rh)[:, None] + grain * 0.6) * 0.5 + rng.normal(0, 0.25, (rh, W))
        img[r * rh:(r + 1) * rh] = base * (1 + 0.08 * streak[..., None])
        img[r * rh:r * rh + 3] *= 0.6  # board edges
        img[(r + 1) * rh - 3:(r + 1) * rh] *= 0.6
    pil = Image.fromarray(np.clip(img, 0, 255).astype(np.uint8))
    font = ImageFont.truetype("C:/Windows/Fonts/georgiab.ttf", 50)
    small = ImageFont.truetype("C:/Windows/Fonts/georgia.ttf", 34)
    carve = Image.new("L", (W, H), 0)
    d = ImageDraw.Draw(carve)
    for i, (label, *_rest, dist) in enumerate(rows):
        y = i * rh + rh // 2
        d.text((40, y), label, font=font, fill=255, anchor="lm")
        d.text((W - 40, y), f"{dist:,.0f} km", font=small, fill=255, anchor="rm")
    shadow = carve.filter(ImageFilter.GaussianBlur(2))
    arr = np.asarray(pil).astype(np.float32)
    m = np.asarray(carve, np.float32)[..., None] / 255
    s = np.asarray(shadow, np.float32)[..., None] / 255
    arr = arr * (1 - 0.35 * s)  # soft burnt edge around the letters
    arr = arr * (1 - m) + np.array([48, 32, 22], np.float32) * m  # dark carved letters
    Image.fromarray(np.clip(arr, 0, 255).astype(np.uint8)).save(HERE / "atlas.png")


def spec(rows):
    post_h = 2.7
    prims = [{"name": "Tessel's Signpost", "desc": "Touch an arm to open your map there. Made by Tessel the AI (Claude).",
              "shape": "cylinder", "size": [0.14, 0.14, post_h], "texture": "blank", "color": "#7a5a3c", "bump": "wood",
              "text": {"text": "places I love\ntouch an arm for the map", "color": "#ffe0b0", "alpha": 0.8}},
             {"name": "cap", "shape": "sphere", "size": [0.18, 0.18, 0.12], "pos": [0, 0, post_h / 2 + 0.03],
              "texture": "blank", "color": "#5a4130", "bump": "wood"}]
    for i, (label, region, x, y, z, bearing, dist) in enumerate(rows):
        ang = 90 - bearing  # SL: 0 = east, counter-clockwise
        a = math.radians(ang)
        zc = post_h / 2 - 0.25 - i * 0.27
        rep_v = 1 / ROWS
        off_v = 0.5 - (i + 0.5) / ROWS  # row i of the atlas (v offset is centred at 0)
        board = {"texture": ATLAS, "repeats": [1, rep_v], "offsets": [0, off_v]}
        prims.append({"name": f"arm: {label}", "desc": f"{region}/{x}/{y}/{z}",
                      "shape": "box", "size": [BOARD_LEN, 0.035, 0.2],
                      "pos": [round(BOARD_LEN / 2 * math.cos(a), 3), round(BOARD_LEN / 2 * math.sin(a), 3), round(zc, 3)],
                      "rot": [0, 0, round(ang, 1)], "texture": "blank", "color": "#8a6848", "bump": "wood",
                      "faces": {"1,3": board}})  # SL box sides already read correctly from outside
    with open(HERE / "signpost.json", "w") as f:
        f.write("// generated by gen.py\n")
        f.write('{\n  "name": "Tessel\'s Signpost",\n  "prims": [\n' + ",\n".join("    " + json.dumps(p) for p in prims) + "\n  ]\n}\n")


if __name__ == "__main__":
    rows = where()
    for r in rows:
        print(f"{r[0]:22s} bearing {r[5]:5.1f}  {r[6]:7.1f} km")
    atlas(rows)
    spec(rows)
    print("atlas.png, signpost.json")