//! Include-based coverage for microphone source-selection helpers.
//!
//! Scope: include `client/src/input/microphone.rs` and exercise Pulse source
//! parsing + fallback behavior without requiring a live audio stack.
//! Targets: `client/src/input/microphone.rs`.
//! Why: source selection regressions should be caught with deterministic tests.

#[allow(warnings)]
mod live_capture_clock {
    include!("support/live_capture_clock_shim.rs");
}

#[allow(warnings)]
mod microphone_include_contract {
    include!(env!("LESAVKA_CLIENT_MICROPHONE_SRC"));

    use serial_test::serial;
    use std::fs;
    use std::os::unix::fs::PermissionsExt;
    use std::path::Path;
    use temp_env::with_var;
    use tempfile::tempdir;

    fn write_executable(dir: &Path, name: &str, body: &str) {
        let path = dir.join(name);
        fs::write(&path, body).expect("write script");
        let mut perms = fs::metadata(&path).expect("metadata").permissions();
        perms.set_mode(0o755);
        fs::set_permissions(path, perms).expect("chmod");
    }

    fn with_fake_command(name: &str, script_body: &str, f: impl FnOnce()) {
        let dir = tempdir().expect("tempdir");
        write_executable(dir.path(), name, script_body);
        let prior = std::env::var("PATH").unwrap_or_default();
        let merged = if prior.is_empty() {
            dir.path().display().to_string()
        } else {
            format!("{}:{prior}", dir.path().display())
        };
        with_var("PATH", Some(merged), f);
    }

    fn with_fake_pactl(script_body: &str, f: impl FnOnce()) {
        with_fake_command("pactl", script_body, f);
    }

    fn with_fake_pw_dump(script_body: &str, f: impl FnOnce()) {
        with_fake_command("pw-dump", script_body, f);
    }

    #[test]
    #[serial]
    fn pulse_source_by_substr_matches_expected_device_name() {
        let script = r#"#!/usr/bin/env sh
if [ "$1" = "list" ] && [ "$2" = "short" ] && [ "$3" = "sources" ]; then
  echo "0 alsa_input.pci.monitor module-alsa-card.c s16le 2ch 48000Hz RUNNING"
  echo "1 alsa_input.usb-Mic_1234-00.analog-stereo module-alsa-card.c s16le 2ch 48000Hz IDLE"
  exit 0
fi
exit 0
"#;
        with_fake_pactl(script, || {
            let src =
                MicrophoneCapture::pulse_source_by_substr("Mic_1234").expect("matching source");
            assert_eq!(src, "alsa_input.usb-Mic_1234-00.analog-stereo");
        });
    }

    #[test]
    #[serial]
    fn pulse_source_desc_formats_selected_non_monitor_source() {
        let script = r#"#!/usr/bin/env sh
if [ "$1" = "list" ] && [ "$2" = "short" ] && [ "$3" = "sources" ]; then
  echo "0 alsa_input.pci.monitor module-alsa-card.c s16le 2ch 48000Hz RUNNING"
  echo "1 alsa_input.usb-DeskMic_5678-00.analog-stereo module-alsa-card.c s16le 2ch 48000Hz IDLE"
  exit 0
fi
exit 0
"#;
        with_fake_pactl(script, || {
            let source =
                MicrophoneCapture::pulse_source_by_substr("DeskMic_5678").expect("matching source");
            let desc = MicrophoneCapture::pulse_source_desc(Some(&source));
            assert!(
                desc.contains("pulsesrc device=alsa_input.usb-DeskMic_5678-00.analog-stereo"),
                "expected escaped non-monitor source argument: {desc}"
            );
            assert!(desc.contains("buffer-time=40000"));
            assert!(desc.contains("latency-time=10000"));
        });
    }

    #[test]
    #[serial]
    fn pulse_source_by_substr_returns_none_when_pactl_is_unavailable() {
        with_var("PATH", Some("/definitely/missing/path"), || {
            assert!(MicrophoneCapture::pulse_source_by_substr("anything").is_none());
            assert_eq!(
                MicrophoneCapture::pulse_source_desc(None),
                "pulsesrc do-timestamp=true buffer-time=40000 latency-time=10000"
            );
        });
    }

    #[test]
    #[serial]
    fn pulse_source_desc_allows_low_latency_overrides_with_safe_clamp() {
        with_var("LESAVKA_MIC_PULSE_BUFFER_TIME_US", Some("20000"), || {
            with_var("LESAVKA_MIC_PULSE_LATENCY_TIME_US", Some("50000"), || {
                assert_eq!(
                    MicrophoneCapture::pulse_source_desc(None),
                    "pulsesrc do-timestamp=true buffer-time=20000 latency-time=20000"
                );
            });
        });
    }

    #[test]
    fn pipewire_source_desc_formats_selected_and_default_sources() {
        let selected = MicrophoneCapture::pipewire_source_desc(Some("alsa input/Desk Mic"));
        assert!(
            selected.contains("pipewiresrc target-object='alsa input/Desk Mic'"),
            "expected shell-escaped PipeWire target: {selected}"
        );
        assert_eq!(
            MicrophoneCapture::pipewire_source_desc(Some("   ")),
            "pipewiresrc do-timestamp=true"
        );
        assert_eq!(
            MicrophoneCapture::pipewire_source_desc(None),
            "pipewiresrc do-timestamp=true"
        );
    }

    #[test]
    #[serial]
    fn pipewire_source_by_substr_prefers_audio_sources_and_skips_monitors() {
        let script = r#"#!/usr/bin/env sh
cat <<'JSON'
[
  {"info":{"props":{"media.class":"Audio/Sink","node.name":"alsa_output.usb-headphones"}}},
  {"info":{"props":{"media.class":"Audio/Source","node.name":"alsa_input.usb-DeskMic.monitor"}}},
  {"info":{"props":{"media.class":"Audio/Source","node.name":"alsa_input.usb-DeskMic"}}},
  {"info":{"props":{"media.class":"Audio/Source","node.nick":"Fallback Nick Mic"}}}
]
JSON
"#;
        with_fake_pw_dump(script, || {
            assert_eq!(
                MicrophoneCapture::pipewire_source_by_substr("DeskMic").as_deref(),
                Some("alsa_input.usb-DeskMic")
            );
            assert_eq!(
                MicrophoneCapture::pipewire_source_by_substr("Fallback Nick").as_deref(),
                Some("Fallback Nick Mic")
            );
            assert!(MicrophoneCapture::pipewire_source_by_substr("missing").is_none());
        });
    }

    #[test]
    fn default_source_desc_selects_a_valid_gstreamer_source_description() {
        gst::init().ok();
        let desc = MicrophoneCapture::default_source_desc();
        assert!(
            desc == "pipewiresrc do-timestamp=true"
                || desc == "pulsesrc do-timestamp=true buffer-time=40000 latency-time=10000",
            "default source should stay a simple PipeWire/Pulse source: {desc}"
        );
    }

    #[test]
    #[serial]
    fn mic_gain_env_defaults_and_clamps_for_uplink_gain() {
        with_var("LESAVKA_MIC_GAIN", None::<&str>, || {
            assert_eq!(mic_gain_from_env(), 1.0);
        });
        with_var("LESAVKA_MIC_GAIN", Some("2.75"), || {
            assert_eq!(mic_gain_from_env(), 2.75);
        });
        with_var("LESAVKA_MIC_GAIN", Some("99"), || {
            assert_eq!(mic_gain_from_env(), 4.0);
        });
        with_var("LESAVKA_MIC_GAIN", Some("-1"), || {
            assert_eq!(mic_gain_from_env(), 0.0);
        });
        with_var("LESAVKA_MIC_GAIN", Some("bad"), || {
            assert_eq!(mic_gain_from_env(), 1.0);
        });
    }

    #[test]
    fn microphone_pipeline_desc_adds_level_tap_only_when_requested() {
        let with_tap = microphone_pipeline_desc("audiotestsrc is-live=true", 2.5, true);
        assert!(
            with_tap
                .contains("audiotestsrc is-live=true ! audioconvert ! audioresample ! audio/x-raw")
        );
        assert!(!with_tap.contains("audiotestsrc is-live=true ! audio/x-raw"));
        assert!(with_tap.contains("tee name=t"));
        assert!(with_tap.contains("appsink name=level_sink"));
        assert!(with_tap.contains("volume name=mic_input_gain volume=2.500"));

        let without_tap = microphone_pipeline_desc("audiotestsrc is-live=true", 1.0, false);
        assert!(!without_tap.contains("level_sink"));
        assert!(
            without_tap
                .contains("queue max-size-buffers=8 max-size-time=80000000 leaky=downstream")
        );
        assert!(without_tap.contains("appsink name=asink emit-signals=true max-buffers=8"));
    }
}