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use std::time::Duration;
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use crate::Bitrate;
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use crate::RtcConfig;
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use crate::rtp::{Extension, ExtensionMap};
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use super::Rng;
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pub fn random_extmap(rng: &mut Rng, to_set: usize) -> Option<ExtensionMap> {
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    use Extension::*;
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    let mut e = ExtensionMap::empty();
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    for _ in 0..to_set {
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        let id = rng.u8(13)? + 1;
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        let ext = match rng.u8(12)? {
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            0 => AbsoluteSendTime,
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            1 => AudioLevel,
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            2 => TransmissionTimeOffset,
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            3 => VideoOrientation,
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            4 => TransportSequenceNumber,
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            5 => PlayoutDelay,
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            6 => VideoContentType,
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            7 => VideoTiming,
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            8 => RtpStreamId,
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            9 => RepairedRtpStreamId,
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            10 => RtpMid,
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            11 => FrameMarking,
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            12 => ColorSpace,
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            _ => unreachable!(),
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        };
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        e.set(id, ext);
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    }
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    Some(e)
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}
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#[allow(unused)]
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pub fn random_config(rng: &mut Rng) -> Option<RtcConfig> {
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    let mut c = RtcConfig::new();
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    c = c.set_extension_map(random_extmap(rng, 8)?);
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    c = c.set_ice_lite(rng.bool()?);
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    c = c.set_fingerprint_verification(rng.bool()?);
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    c = c.clear_codecs();
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    c = c.enable_opus(rng.bool()?);
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    c = c.enable_h264(rng.bool()?);
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    c = c.enable_vp8(rng.bool()?);
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    c = c.enable_vp9(rng.bool()?);
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    c = c.enable_av1(rng.bool()?);
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    if rng.bool()? {
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        rng.bool(); // consume one
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        c = c.set_stats_interval(None);
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    } else {
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        let t = Duration::from_millis(rng.u64(10_000)?);
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        c = c.set_stats_interval(Some(t));
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    }
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    if rng.bool()? {
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        rng.bool();
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        c = c.enable_bwe(None);
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    } else {
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        c = c.enable_bwe(Some(Bitrate::bps(rng.u64(u64::MAX)?)));
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    }
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    c = c.set_reordering_size_audio(rng.usize(usize::MAX)?);
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    c = c.set_reordering_size_video(rng.usize(usize::MAX)?);
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    c = c.set_send_buffer_audio(rng.usize(usize::MAX)?.saturating_add(1)); // panics if set to 0
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    c = c.set_send_buffer_video(rng.usize(usize::MAX)?);
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    c = c.set_rtp_mode(rng.bool()?);
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    c = c.enable_raw_packets(rng.bool()?);
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    Some(c)
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}