//! Contract tests for requested microphone source selection.
//!
//! Scope: include `client/src/input/microphone.rs` and exercise requested-source
//! success, fallback, and strict-probe failure behavior.
//! Targets: `client/src/input/microphone.rs`.
//! Why: transport probes should fail clearly when the named microphone is absent
//! instead of silently measuring the wrong host source.

#[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 new_uses_requested_source_fragment_when_available() {
        let script = r#"#!/usr/bin/env sh
if [ "$1" = "list" ] && [ "$2" = "short" ] && [ "$3" = "sources" ]; then
  echo "1 alsa_input.usb-LavMic_abc-00.analog-stereo module-alsa-card.c s16le 2ch 48000Hz RUNNING"
  exit 0
fi
exit 0
"#;
        with_fake_pactl(script, || {
            with_var("LESAVKA_MIC_SOURCE", Some("LavMic_abc"), || {
                let result = MicrophoneCapture::new();
                if let Err(err) = result {
                    assert!(!err.to_string().trim().is_empty());
                }
            });
        });
    }

    #[test]
    #[serial]
    fn resolve_source_desc_prefers_pipewire_named_source_when_available() {
        if !MicrophoneCapture::pipewire_source_available() {
            return;
        }

        let script = r#"#!/usr/bin/env sh
cat <<'JSON'
[
  {"info":{"props":{"media.class":"Audio/Source","node.name":"alsa_input.usb-UpstreamMic"}}}
]
JSON
"#;
        with_fake_pw_dump(script, || {
            let desc =
                MicrophoneCapture::resolve_source_desc("UpstreamMic").expect("pipewire source");
            assert!(desc.contains("pipewiresrc target-object=alsa_input.usb-UpstreamMic"));
        });
    }

    #[test]
    #[serial]
    fn new_falls_back_to_default_source_when_requested_fragment_is_missing() {
        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_777-00.analog-stereo module-alsa-card.c s16le 2ch 48000Hz IDLE"
  exit 0
fi
exit 0
"#;
        with_fake_pactl(script, || {
            with_var("LESAVKA_MIC_SOURCE", Some("missing-fragment"), || {
                let result = MicrophoneCapture::new();
                if let Err(err) = result {
                    assert!(!err.to_string().trim().is_empty());
                }
            });
        });
    }

    #[test]
    #[serial]
    fn strict_probe_mode_rejects_missing_requested_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_777-00.analog-stereo module-alsa-card.c s16le 2ch 48000Hz IDLE"
  exit 0
fi
exit 0
"#;
        with_fake_pactl(script, || {
            with_var("LESAVKA_MIC_SOURCE", Some("missing-fragment"), || {
                with_var("LESAVKA_REQUIRE_EXPLICIT_MEDIA_SOURCES", Some("1"), || {
                    match MicrophoneCapture::new() {
                        Ok(_) => panic!("missing mic should fail"),
                        Err(err) => assert!(
                            err.to_string()
                                .contains("requested mic 'missing-fragment' was not found"),
                            "unexpected error: {err}"
                        ),
                    }
                });
            });
        });
    }
}