#!/usr/bin/env python3

import re
import math

import gerbonara.cad.kicad.pcb as pcb


r = 85
cx, cy = 150, 100


si_prefixes = {'k': 1e3, 'M': 1e6, 'G': 1e9, 'm': 1e-3, 'u': 1e-6, 'µ': 1e-6, 'n': 1e-9, 'p': 1e-12, '.': 1, 'r': 1}
def parse_si(s, unit=''):
    if not (match := re.fullmatch(f'([0-9]*)(([.pPnNuUµmrRkKMgG])([0-9]*))?([pPnNuUµmrRkKMgG]?)({unit})?', s)):
        raise ValueError(f'{s} is not a valid number with an SI prefix')
    
    left, _1, dot, right, prefix, _unit = match.groups()
    prefix = prefix or dot or '.'
    multiplier = si_prefixes.get(prefix, si_prefixes.get(prefix.upper(), si_prefixes.get(prefix.lower())))

    return float(f'{left}.{right or ""}0') * multiplier
    

b = pcb.Board.open('self-balancing-test-a.kicad_pcb')
b.unfill_zones()

matches = list(b.find_footprints(name='Package_TO_SOT_SMD:SOT-23', sheetfile='resistor_bank.kicad_sch'))
for i, fp in enumerate(matches):
    alpha = 2*math.pi * i/len(matches)
    fp.at.x, fp.at.y = cx+r, cy
    fp.set_rotation(0)
    fp.rotate(alpha, cx, cy)

    res1, res2 = fp.pads_by_number[3].find_connected(name='Resistor_SMD.*')
    if parse_si(res1.property_value('Value')) > parse_si(res2.property_value('Value')):
        res1, res2 = res2, res1

    res1.at.x, res1.at.y = cx+r+5, cy+2
    res1.set_rotation(0)
    res1.rotate(alpha, cx, cy)

    res2.at.x, res2.at.y = cx+r+5, cy-2
    res2.set_rotation(0)
    res2.rotate(alpha, cx, cy)

b.write('self-balancing-test-a.testout.kicad_pcb')