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//! USB maintenance only. Browser commands cannot reach this parser.
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use crate::{error::Result, platform};
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use serde::Deserialize;
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use std::{thread, time::Duration};
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#[derive(Deserialize)]
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#[serde(tag = "cmd", rename_all = "snake_case", deny_unknown_fields)]
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enum Maintenance {
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    Ping,
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    RestartDevice,
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}
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pub(crate) fn run() -> Result<()> {
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    let mut line = Vec::with_capacity(128);
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    let mut overflow = false;
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    loop {
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        match platform::console_byte() {
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            -1 => thread::sleep(Duration::from_millis(10)),
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            10 => {
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                if !overflow {
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                    match serde_json::from_slice::<Maintenance>(&line) {
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                        Ok(Maintenance::RestartDevice) => platform::restart(),
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                        Ok(Maintenance::Ping) => println!(
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                            "PROBE {{\"event\":\"command_result\",\"cmd\":\"ping\",\"result\":0,\"firmware\":\"rust\"}}"
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                        ),
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                        Err(_) => {}
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                    }
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                }
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                line.clear();
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                overflow = false;
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            }
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            byte => {
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                if line.len() < 128 {
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                    line.push(byte as u8);
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                } else {
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                    overflow = true;
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                }
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            }
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        }
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    }
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}