#!/bin/bash
#
# Chromebox 10 代 - 原生 ChromeOS 音频硬件拓扑收集脚本
# 用于 C1c 任务：在原生 ChromeOS 下收集硬件拓扑，供与 Coreboot+Linux/Windows 对比
#
# 用法（在 ChromeOS 上）:
#   1. 打开 crosh：浏览器按 Ctrl+Alt+T
#   2. 输入 shell 进入 bash
#   3. 将本脚本传到设备后运行，或把下面整段复制粘贴到 shell 中执行
#
# 输出：默认写入 /tmp/audio_topology_chromeos_$(hostname)_$(date).txt
#       请用 文件 应用打开 /tmp 复制到下载目录，或 cat 该文件复制内容到电脑
#
# 注意：ChromeOS 使用 CRAS，无 PulseAudio；部分信息需在浏览器打开 chrome://system
#       在「audio」一节可复制粘贴到本输出文件末尾作为补充

set -e

OUTPUT_DIR="${OUTPUT_DIR:-/tmp}"
OUTPUT="${1:-${OUTPUT_DIR}/audio_topology_chromeos_$(hostname)_$(date +%Y%m%d_%H%M%S).txt}"

log() { echo "[$(date +%H:%M:%S)] $*"; }
section() {
    echo "" >> "$OUTPUT"
    echo "========================================" >> "$OUTPUT"
    echo "### $1" >> "$OUTPUT"
    echo "========================================" >> "$OUTPUT"
    echo "" >> "$OUTPUT"
}
run_cmd() {
    local desc="$1"
    shift
    echo "# $desc" >> "$OUTPUT"
    echo '```' >> "$OUTPUT"
    "$@" >> "$OUTPUT" 2>&1 || echo "(command failed or not available)" >> "$OUTPUT"
    echo '```' >> "$OUTPUT"
    echo "" >> "$OUTPUT"
}

log "Collecting ChromeOS audio topology..."
log "Output: $OUTPUT"

: > "$OUTPUT"
echo "# Chromebox 10 - ChromeOS (native) audio topology" >> "$OUTPUT"
echo "# Collected: $(date -Iseconds 2>/dev/null || date)" >> "$OUTPUT"
echo "# Host: $(hostname)" >> "$OUTPUT"
echo "# Note: Add content from chrome://system -> audio section manually if needed." >> "$OUTPUT"
echo "" >> "$OUTPUT"

# --- System ---
section "System"
run_cmd "uname -a" uname -a
run_cmd "Release (if exists)" cat /etc/lsb-release 2>/dev/null || true

# --- ALSA (kernel layer, CRAS sits on top) ---
section "ALSA /proc/asound"
run_cmd "cat /proc/asound/cards" cat /proc/asound/cards 2>/dev/null || echo "(no /proc/asound/cards)" >> "$OUTPUT"
run_cmd "cat /proc/asound/pcm" cat /proc/asound/pcm 2>/dev/null || true
run_cmd "ls -la /proc/asound" ls -la /proc/asound 2>/dev/null || true

for card_dir in /proc/asound/card[0-9]*; do
    [ -d "$card_dir" ] || continue
    card=$(basename "$card_dir")
    echo "# $card dir:" >> "$OUTPUT"
    echo '```' >> "$OUTPUT"
    ls -la "$card_dir" 2>/dev/null >> "$OUTPUT" || true
    echo '```' >> "$OUTPUT"
done

# --- Codec (HDA) ---
section "HDA Codec"
for codec in /proc/asound/card*/codec*; do
    [ -f "$codec" ] || continue
    echo "# $codec" >> "$OUTPUT"
    echo '```' >> "$OUTPUT"
    cat "$codec" 2>/dev/null >> "$OUTPUT" || true
    echo '```' >> "$OUTPUT"
done

# --- HDMI ELD ---
section "HDMI ELD"
for eld in /proc/asound/card*/eld*; do
    [ -f "$eld" ] || continue
    echo "# $eld" >> "$OUTPUT"
    echo '```' >> "$OUTPUT"
    cat "$eld" 2>/dev/null >> "$OUTPUT" || true
    echo '```' >> "$OUTPUT"
done

# --- sysfs sound ---
section "/sys/class/sound"
run_cmd "ls -la /sys/class/sound" ls -la /sys/class/sound 2>/dev/null || true

# --- PCI (if available) ---
section "PCI audio (if lspci exists)"
if command -v lspci &>/dev/null; then
    run_cmd "lspci -nn | grep -i audio" bash -c "lspci -nn | grep -i audio || echo '(none)'"
else
    echo "# lspci not available on this ChromeOS image" >> "$OUTPUT"
    echo "" >> "$OUTPUT"
fi

# --- CRAS / ALSA utils (if present) ---
section "Audio tools (optional)"
run_cmd "which cras_test aplay amixer" bash -c "which cras_test aplay amixer 2>/dev/null || true"
if command -v cras_test &>/dev/null; then
    run_cmd "cras_test --help 2>&1 | head -5" bash -c "cras_test --help 2>&1 | head -5" || true
fi

# --- DMI / board (if readable) ---
section "Board (DMI-like)"
for f in /sys/class/dmi/id/board_name /sys/class/dmi/id/product_name /sys/class/dmi/id/sys_vendor; do
    [ -f "$f" ] && echo "$f: $(cat "$f" 2>/dev/null)" >> "$OUTPUT"
done

log "Done. Output: $OUTPUT"
log "Copy this file to your PC and save under audio_topology/collected/"