# -*- coding: utf-8 -*-
u"""D16：SDA6 / SCL6（CH224A ↔ TCA9548A 通道 5）为什么布不通 —— 在布线器同一张网格上做泛洪（服务器跑）。

    DCDC_ROUTE_SERVER=1 /root/pypy/bin/pypy3 .claude/r2/d16_reach.py [NET ...]   # 默认 SDA6 SCL6

障碍 = 板上快照（_board_for_nets.json）+ _d16_route.out.json 里本轮新增的铜，建图口径与 route_one 相同
（route_base._build：L1 西侧 12V 大铜挡线、PD_L1 窗口、NPTH / 天线净空、内层线挡孔）。
从本网每只焊盘的引出格点出发，两层 + 换层孔泛洪：报每只焊盘能到的格点数 / 外框、两头碰不碰得上；
碰不上时列出「围住它的那一圈」上是哪些网（格点归属），好决定拆谁、或者改原理图。
"""
import collections
import io
import json
import os
import sys

if os.environ.get('DCDC_ROUTE_SERVER') != '1':
    sys.exit(u'!! 布线运算只在服务器上跑（DCDC_ROUTE_SERVER=1），见 CLAUDE.md')
if '--grid' not in sys.argv:
    sys.argv += ['--grid', '0.125']
HERE = os.path.dirname(os.path.abspath(__file__))
sys.path.insert(0, os.path.dirname(HERE))
sys.path.insert(0, HERE)
import route_nets as N                                           # noqa: E402

R = N.R
RT = R.RT


def main():
    nets = [a for a in sys.argv[1:] if not a.startswith('--') and a not in ('0.125',)] or ['SDA6', 'SCL6']
    b = json.load(io.open(os.path.join(HERE, '_board_for_nets.json'), encoding='utf-8'))
    segs = [tuple(s[:7]) for s in b['segs']]
    vias = [tuple(v[:3]) for v in b['vias']]
    p = os.path.join(HERE, '_d16_route.out.json')
    if os.path.exists(p):
        r = json.load(io.open(p, encoding='utf-8'))
        segs += [tuple(s[:7]) for s in r['segs']]
        vias += [tuple(v[:3]) for v in r['vias']]
    pads = R.load_pads()
    N.INNER[:] = [s for s in segs if s[0] in (15, 16)]
    obst = [s for s in segs if s[0] in (1, 2)]
    w = 0.2
    halfw = w / 2.0 + RT.CLR
    g, gt, others = R.grid_now(pads, halfw, obst, vias, [])
    inv = {v: k for k, v in g._id.items()}          # router.Grid.nid：网名 → 1..250；255 = 多网争用
    inv[255] = u'#多网'
    out = {}
    for net in nets:
        ps = [q for q in pads if q[7] == net and not str(q[1]).endswith(R.TH_SUFFIX)]
        regions = []
        for q in ps:
            starts = RT.pad_nodes(g, q, halfw, others.get(q[6], []), w / 2.0, gt)
            seen = set()
            dq = collections.deque()
            for nd in starts:
                n = (nd[0], nd[1], nd[2])
                if g.free(n[0], n[1], n[2], net):
                    seen.add(n)
                    dq.append(n)
            border = collections.Counter()
            while dq:
                l, i, j = dq.popleft()
                for di, dj in ((1, 0), (-1, 0), (0, 1), (0, -1), (1, 1), (1, -1), (-1, 1), (-1, -1)):
                    n = (l, i + di, j + dj)
                    if n in seen:
                        continue
                    if g.free(l, i + di, j + dj, net):
                        seen.add(n)
                        dq.append(n)
                    elif 0 <= i + di < RT.NX and 0 <= j + dj < RT.NY:
                        border[(l, g.own[l][g.idx(i + di, j + dj)])] += 1
                o = RT.LAY[1] if l == RT.LAY[0] else RT.LAY[0]
                n = (o, i, j)
                if n not in seen and g.free(o, i, j, net) and g.free_via(i, j, net):
                    seen.add(n)
                    dq.append(n)
            xs = [RT.wx(n[1]) for n in seen]
            ys = [RT.wy(n[2]) for n in seen]
            box = (round(min(xs), 2), round(min(ys), 2), round(max(xs), 2), round(max(ys), 2)) if seen else None
            top = [(l, inv.get(k, k), c) for (l, k), c in border.most_common(12)]
            regions.append({'pad': '%s.%s' % (q[0], q[1]), 'starts': len(starts), 'cells': len(seen),
                            'box': box, 'border': top, 'set': seen})
            print(u'%s %s.%s：引出格点 %d，能到 %d 格，外框 %s；边界上最多的归属 %s'
                  % (net, q[0], q[1], len(starts), len(seen), box, top[:8]))
        meet = len(regions) >= 2 and bool(regions[0]['set'] & regions[1]['set'])
        print(u'%s：两头%s' % (net, u'碰得上（该布得通，查 route_one）' if meet else u'碰不上 —— 一头被围死'))
        out[net] = [{k: v for k, v in rg.items() if k != 'set'} for rg in regions] + [{'meet': meet}]
    io.open(os.path.join(HERE, '_d16_reach.out.json'), 'w', encoding='utf-8').write(
        json.dumps(out, ensure_ascii=False, default=str))


if __name__ == '__main__':
    main()