"""Two-input transistor pair analyzer, independent of driver feedback."""
import sigrokdecode as srd
from common.setgui_decoders.transistor_pair import PairTimingChecker


class Decoder(srd.Decoder):
    api_version = 3
    id = 'transistor_pair'
    name = 'Transistor pair'
    longname = 'Transistor pair: mintime / deadtime / overlap'
    desc = 'Checks ON/OFF pulse limits, deadtime, overlap, frequency and duty.'
    license = 'gplv2+'
    inputs = ['logic']
    outputs = []
    tags = ['Clock/timing', 'Util']
    channels = (
        {'id': 'vin1', 'name': 'Vin1', 'desc': 'First transistor command'},
        {'id': 'vin2', 'name': 'Vin2', 'desc': 'Second transistor command'},
    )
    options = (
        {'id': 'vin1_active', 'desc': 'Vin1 active level', 'default': 'high', 'values': ('high', 'low')},
        {'id': 'vin2_active', 'desc': 'Vin2 active level', 'default': 'high', 'values': ('high', 'low')},
        {'id': 'vin1_mintime_ns', 'desc': 'Vin1 minimum ON time (ns)', 'default': 0},
        {'id': 'vin2_mintime_ns', 'desc': 'Vin2 minimum ON time (ns)', 'default': 0},
        {'id': 'vin1_minoff_ns', 'desc': 'Vin1 minimum OFF time (ns)', 'default': 0},
        {'id': 'vin2_minoff_ns', 'desc': 'Vin2 minimum OFF time (ns)', 'default': 0},
        {'id': 'deadtime_12_ns', 'desc': 'Minimum deadtime Vin1 -> Vin2 (ns)', 'default': 0},
        {'id': 'deadtime_21_ns', 'desc': 'Minimum deadtime Vin2 -> Vin1 (ns)', 'default': 0},
    )
    annotations = (
        ('vin1-on', 'Vin1 ON duration'), ('vin2-on', 'Vin2 ON duration'),
        ('deadtime', 'Deadtime'), ('failure', 'FAULT'),
        ('vin1-off', 'Vin1 OFF duration'), ('vin2-off', 'Vin2 OFF duration'),
        ('vin1-period', 'Vin1 period / frequency / duty'),
        ('vin2-period', 'Vin2 period / frequency / duty'),
    )
    annotation_rows = (
        ('deadtime', 'Deadtime', (2,)),
        ('faults', 'FAULT: overlap / timing', (3,)),
        ('vin1', 'Vin1 mintime / OFF', (0, 4)),
        ('vin2', 'Vin2 mintime / OFF', (1, 5)),
        ('pwm1', 'Vin1 period / frequency / duty', (6,)),
        ('pwm2', 'Vin2 period / frequency / duty', (7,)),
    )

    def __init__(self):
        self.reset()

    def reset(self):
        self.samplerate = None
        self.checker = None

    def metadata(self, key, value):
        if key == srd.SRD_CONF_SAMPLERATE:
            self.samplerate = value

    def start(self):
        self.out_ann = self.register(srd.OUTPUT_ANN)

    def _put_events(self, events):
        for event in events:
            kind = event['kind']
            channel = event.get('channel', 1) - 1
            ann = (3 if kind in ('mintime_fail', 'deadtime_fail', 'off_fail', 'overlap') else
                   2 if kind == 'deadtime' else channel if kind == 'mintime_ok' else
                   4 + channel if kind == 'off_time' else 6 + channel)
            self.put(event['start'], event['end'], self.out_ann, [ann, [event['text'], event['short']]])

    def decode(self):
        if not self.samplerate:
            raise ValueError('Cannot decode without samplerate.')
        if not self.has_channel(0) or not self.has_channel(1):
            raise ValueError('Connect both Vin1 and Vin2.')
        numeric = {name: self.options[name] for name in (
            'vin1_mintime_ns', 'vin2_mintime_ns', 'vin1_minoff_ns', 'vin2_minoff_ns',
            'deadtime_12_ns', 'deadtime_21_ns')}
        self.checker = PairTimingChecker(self.samplerate,
            self.options['vin1_active'] == 'high', self.options['vin2_active'] == 'high', **numeric)
        # Do not retain DSView's mutable native wait tuple.
        pins = list(self.wait({}))
        self._put_events(self.checker.update(self.samplenum, *pins))
        while True:
            pins = list(self.wait([{0: 'e'}, {1: 'e'}]))
            self._put_events(self.checker.update(self.samplenum, *pins))

    def end(self):
        if self.checker is not None:
            self._put_events(self.checker.finish(self.samplenum))