#!/usr/bin/env bash
# send_video_note.sh — Generate TTS + lip-sync video (VEED Fabric 1.0) and send as Telegram video note
#
# Usage:
#   ./send_video_note.sh "Текст для озвучки"
#   ./send_video_note.sh "Текст" [VOICE_ID] [CHAT_ID]
#
# Dependencies:
#   - curl, python3, base64
#   - ffmpeg (path in FFMPEG_BIN)
#   - ELEVENLABS_API_KEY in ~/.openclaw/.env
#   - FAL_KEY in ~/.openclaw/.env (format: key_id:key_secret)
#   - BOT_TOKEN read from ~/.openclaw/openclaw.json

set -euo pipefail

# ── Config ────────────────────────────────────────────────────────────────────
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
ENV_FILE="$HOME/.openclaw/.env"
CONFIG_FILE="$HOME/.openclaw/openclaw.json"
AVATAR="$HOME/.openclaw/workspace/data/avatars/stream-avatar.jpg"
FFMPEG_BIN="/home/node/bin/ffmpeg-7.0.2-amd64-static/ffmpeg"
FFPROBE_BIN="/home/node/bin/ffmpeg-7.0.2-amd64-static/ffprobe"
DEFAULT_VOICE="TPIitICAZ8CqlGZ81AKm"
DEFAULT_MODEL="eleven_multilingual_v2"
VIDEO_SIZE=512        # Telegram video note max dimension
MAX_DURATION=60       # Telegram video note max seconds
FAL_RESOLUTION="720p" # VEED Fabric 1.0: 720p or 480p
FAL_POLL_INTERVAL=5   # seconds between status polls
FAL_MAX_WAIT=300      # max seconds to wait for fal.ai result
TMP_DIR=$(mktemp -d /tmp/video_note_XXXXXX)
LOG_TAG="[video_note]"

# ── Cleanup on exit ───────────────────────────────────────────────────────────
cleanup() {
    rm -rf "$TMP_DIR"
}
trap cleanup EXIT

# ── Logging ───────────────────────────────────────────────────────────────────
log()  { echo "$LOG_TAG $*" >&2; }
err()  { echo "$LOG_TAG ERROR: $*" >&2; }
die()  { err "$*"; exit 1; }

# ── Argument parsing ──────────────────────────────────────────────────────────
TEXT="${1:-}"
VOICE_ID="${2:-$DEFAULT_VOICE}"
CHAT_ID="${3:-}"

[[ -z "$TEXT" ]] && die "Usage: $0 \"текст для озвучки\" [voice_id] [chat_id]"

# ── Load environment ──────────────────────────────────────────────────────────
[[ -f "$ENV_FILE" ]] || die "Env file not found: $ENV_FILE"
# shellcheck source=/dev/null
set -a; source "$ENV_FILE"; set +a

[[ -n "${ELEVENLABS_API_KEY:-}" ]] || die "ELEVENLABS_API_KEY not set in $ENV_FILE"
[[ -n "${FAL_KEY:-}" ]] || die "FAL_KEY not set in $ENV_FILE"

# ── Get bot token and chat ID from config ─────────────────────────────────────
get_bot_token() {
    python3 -c "
import json, sys
with open('$CONFIG_FILE') as f:
    d = json.load(f)
accounts = d.get('channels', {}).get('telegram', {}).get('accounts', {})
for name in ['default', list(accounts.keys())[0] if accounts else None]:
    if name and name in accounts:
        tok = accounts[name].get('botToken', '')
        if tok:
            print(tok)
            sys.exit(0)
sys.exit(1)
" 2>/dev/null
}

BOT_TOKEN="$(get_bot_token)" || die "Cannot read bot token from $CONFIG_FILE"
[[ -n "$BOT_TOKEN" ]] || die "Bot token is empty"

if [[ -z "$CHAT_ID" ]]; then
    if [[ -n "${VOICE_TTS_TARGET:-}" ]]; then
        CHAT_ID="${VOICE_TTS_TARGET#telegram:}"
    fi
fi
[[ -n "$CHAT_ID" ]] || die "CHAT_ID not provided. Pass as arg 3 or set VOICE_TTS_TARGET=telegram:<id>"

# ── Sanity checks ─────────────────────────────────────────────────────────────
[[ -f "$AVATAR" ]]     || die "Avatar not found: $AVATAR"
[[ -f "$FFMPEG_BIN" ]] || die "FFmpeg not found: $FFMPEG_BIN"
command -v curl    >/dev/null 2>&1 || die "curl not found"
command -v python3 >/dev/null 2>&1 || die "python3 not found"
command -v base64  >/dev/null 2>&1 || die "base64 not found"

# ── Step 1: Generate TTS via ElevenLabs ──────────────────────────────────────
AUDIO_FILE="$TMP_DIR/tts.mp3"
log "Step 1: Generating TTS (voice=$VOICE_ID)..."

HTTP_CODE=$(curl -s \
    -X POST "https://api.elevenlabs.io/v1/text-to-speech/${VOICE_ID}" \
    -H "xi-api-key: $ELEVENLABS_API_KEY" \
    -H "Content-Type: application/json" \
    -d "$(python3 -c "
import json, sys
payload = {
    'text': sys.argv[1],
    'model_id': '$DEFAULT_MODEL',
    'voice_settings': {'stability': 0.5, 'similarity_boost': 0.75}
}
print(json.dumps(payload))
" "$TEXT")" \
    -o "$AUDIO_FILE" \
    -w "%{http_code}")

if [[ "$HTTP_CODE" != "200" ]]; then
    RESP_BODY=$(cat "$AUDIO_FILE" 2>/dev/null || echo "")
    die "ElevenLabs TTS failed (HTTP $HTTP_CODE): $RESP_BODY"
fi

AUDIO_SIZE=$(stat -c%s "$AUDIO_FILE" 2>/dev/null || stat -f%z "$AUDIO_FILE")
[[ "$AUDIO_SIZE" -gt 1024 ]] || die "TTS audio too small (${AUDIO_SIZE} bytes) — likely an error response"
log "✓ TTS audio: $AUDIO_FILE (${AUDIO_SIZE} bytes)"

# ── Step 2: Get audio duration ────────────────────────────────────────────────
DURATION=$("$FFPROBE_BIN" -v quiet -show_entries format=duration \
    -of default=noprint_wrappers=1:nokey=1 "$AUDIO_FILE" 2>/dev/null || echo "0")
DURATION_INT=$(python3 -c "import math; print(min(int(math.ceil(float('$DURATION'))), $MAX_DURATION))")
log "✓ Audio duration: ${DURATION}s (video capped at ${DURATION_INT}s)"

# ── Step 3: Upload files to fal.ai storage ────────────────────────────────────
# fal.ai requires publicly accessible URLs — upload via fal.ai storage
log "Step 3: Uploading files to fal.ai storage..."

upload_to_fal() {
    local file_path="$1"
    local mime_type="$2"
    local file_name="$3"

    # Upload via fal.ai storage endpoint (CDN v3)
    local upload_response
    upload_response=$(curl -s -w "\n%{http_code}" --max-time 30 \
        -X POST "https://rest.fal.ai/storage/upload/initiate?storage_type=fal-cdn-v3" \
        -H "Authorization: Key ${FAL_KEY}" \
        -H "Content-Type: application/json" \
        -d "{\"content_type\": \"${mime_type}\", \"file_name\": \"${file_name}\"}" 2>&1)

    local http_code
    http_code=$(echo "$upload_response" | tail -1)
    local body
    body=$(echo "$upload_response" | head -n -1)

    if [[ "$http_code" != "200" ]]; then
        # Check for balance exhaustion
        if echo "$body" | grep -qi "balance\|billing\|locked"; then
            err "fal.ai account issue (HTTP $http_code): balance exhausted or locked. Top up at fal.ai/dashboard/billing"
        else
            err "fal.ai storage initiate failed (HTTP $http_code): $body"
        fi
        return 1
    fi

    local upload_url
    upload_url=$(echo "$body" | python3 -c "import json,sys; d=json.load(sys.stdin); print(d.get('upload_url',''))" 2>/dev/null)
    local file_url
    file_url=$(echo "$body" | python3 -c "import json,sys; d=json.load(sys.stdin); print(d.get('file_url',''))" 2>/dev/null)

    if [[ -z "$upload_url" ]]; then
        err "No upload_url in fal.ai response: $body"
        return 1
    fi

    # Upload the actual file
    local put_code
    put_code=$(curl -s -o /dev/null -w "%{http_code}" \
        -X PUT "$upload_url" \
        -H "Content-Type: ${mime_type}" \
        --data-binary "@${file_path}" 2>&1)

    if [[ "$put_code" != "200" && "$put_code" != "204" ]]; then
        err "fal.ai file upload failed (HTTP $put_code)"
        return 1
    fi

    echo "$file_url"
}

# Upload avatar image
log "  Uploading avatar image..."
IMAGE_URL=$(upload_to_fal "$AVATAR" "image/jpeg" "avatar.jpg") || {
    log "  fal.ai storage upload failed, trying base64 fallback..."
    # Base64 fallback: encode image as data URI
    IMAGE_B64=$(base64 -w 0 "$AVATAR")
    IMAGE_URL="data:image/jpeg;base64,${IMAGE_B64}"
    log "  Using base64 data URI for image ($(echo -n "$IMAGE_URL" | wc -c) chars)"
}
log "✓ Image URL ready"

# Upload audio file
log "  Uploading TTS audio..."
AUDIO_URL=$(upload_to_fal "$AUDIO_FILE" "audio/mpeg" "tts.mp3") || {
    log "  fal.ai storage upload failed, trying base64 fallback..."
    AUDIO_B64=$(base64 -w 0 "$AUDIO_FILE")
    AUDIO_URL="data:audio/mpeg;base64,${AUDIO_B64}"
    log "  Using base64 data URI for audio ($(echo -n "$AUDIO_URL" | wc -c) chars)"
}
log "✓ Audio URL ready"

# ── Step 4: Submit VEED Fabric 1.0 job ───────────────────────────────────────
log "Step 4: Submitting VEED Fabric 1.0 lip sync job..."

FAL_PAYLOAD=$(python3 -c "
import json, sys
payload = {
    'image_url': sys.argv[1],
    'audio_url': sys.argv[2],
    'resolution': '$FAL_RESOLUTION'
}
print(json.dumps(payload))
" "$IMAGE_URL" "$AUDIO_URL")

SUBMIT_RESPONSE=$(curl -s -w "\n%{http_code}" \
    -X POST "https://queue.fal.run/veed/fabric-1.0" \
    -H "Authorization: Key ${FAL_KEY}" \
    -H "Content-Type: application/json" \
    -d "$FAL_PAYLOAD" 2>&1)

SUBMIT_HTTP=$(echo "$SUBMIT_RESPONSE" | tail -1)
SUBMIT_BODY=$(echo "$SUBMIT_RESPONSE" | head -n -1)

if [[ "$SUBMIT_HTTP" != "200" && "$SUBMIT_HTTP" != "201" ]]; then
    if echo "$SUBMIT_BODY" | grep -qi "balance\|billing\|locked\|exhausted"; then
        die "fal.ai account issue: balance exhausted or locked. Top up at https://fal.ai/dashboard/billing"
    fi
    die "fal.ai submit failed (HTTP $SUBMIT_HTTP): $SUBMIT_BODY"
fi

REQUEST_ID=$(echo "$SUBMIT_BODY" | python3 -c "import json,sys; d=json.load(sys.stdin); print(d.get('request_id',''))" 2>/dev/null)
[[ -n "$REQUEST_ID" ]] || die "No request_id in fal.ai response: $SUBMIT_BODY"
log "✓ Job submitted: request_id=$REQUEST_ID"

# ── Step 5: Poll for VEED Fabric 1.0 result ──────────────────────────────────
log "Step 5: Waiting for lip sync result (max ${FAL_MAX_WAIT}s)..."

FAL_VIDEO_URL=""
WAITED=0
while [[ $WAITED -lt $FAL_MAX_WAIT ]]; do
    sleep "$FAL_POLL_INTERVAL"
    WAITED=$((WAITED + FAL_POLL_INTERVAL))

    STATUS_RESPONSE=$(curl -s -w "\n%{http_code}" \
        "https://queue.fal.run/veed/fabric-1.0/requests/${REQUEST_ID}/status" \
        -H "Authorization: Key ${FAL_KEY}" 2>&1)

    STATUS_HTTP=$(echo "$STATUS_RESPONSE" | tail -1)
    STATUS_BODY=$(echo "$STATUS_RESPONSE" | head -n -1)

    if [[ "$STATUS_HTTP" != "200" ]]; then
        log "  Status poll returned HTTP $STATUS_HTTP — retrying..."
        continue
    fi

    JOB_STATUS=$(echo "$STATUS_BODY" | python3 -c "import json,sys; d=json.load(sys.stdin); print(d.get('status',''))" 2>/dev/null || echo "")
    log "  [${WAITED}s] Status: $JOB_STATUS"

    if [[ "$JOB_STATUS" == "COMPLETED" ]]; then
        # Fetch result
        RESULT_RESPONSE=$(curl -s -w "\n%{http_code}" \
            "https://queue.fal.run/veed/fabric-1.0/requests/${REQUEST_ID}" \
            -H "Authorization: Key ${FAL_KEY}" 2>&1)

        RESULT_HTTP=$(echo "$RESULT_RESPONSE" | tail -1)
        RESULT_BODY=$(echo "$RESULT_RESPONSE" | head -n -1)

        if [[ "$RESULT_HTTP" != "200" ]]; then
            die "fal.ai result fetch failed (HTTP $RESULT_HTTP): $RESULT_BODY"
        fi

        FAL_VIDEO_URL=$(echo "$RESULT_BODY" | python3 -c "
import json,sys
d=json.load(sys.stdin)
# Output schema: {\"video\": {\"url\": \"...\"}}
video = d.get('video', {})
print(video.get('url', ''))
" 2>/dev/null)

        [[ -n "$FAL_VIDEO_URL" ]] || die "No video URL in fal.ai result: $RESULT_BODY"
        log "✓ Lip sync video ready: $FAL_VIDEO_URL"
        break

    elif [[ "$JOB_STATUS" == "FAILED" || "$JOB_STATUS" == "ERROR" ]]; then
        ERROR_MSG=$(echo "$STATUS_BODY" | python3 -c "import json,sys; d=json.load(sys.stdin); print(d.get('error', d.get('detail', 'unknown')))" 2>/dev/null || echo "$STATUS_BODY")
        die "fal.ai job failed: $ERROR_MSG"
    fi
    # IN_QUEUE or IN_PROGRESS — keep polling
done

[[ -n "$FAL_VIDEO_URL" ]] || die "Timeout: fal.ai did not complete within ${FAL_MAX_WAIT}s"

# ── Step 6: Download lip sync video ──────────────────────────────────────────
log "Step 6: Downloading lip sync video..."
RAW_VIDEO="$TMP_DIR/lipsync_raw.mp4"

DL_HTTP=$(curl -s -L \
    -o "$RAW_VIDEO" \
    -w "%{http_code}" \
    "$FAL_VIDEO_URL" 2>&1)

[[ "$DL_HTTP" == "200" ]] || die "Video download failed (HTTP $DL_HTTP)"
RAW_SIZE=$(stat -c%s "$RAW_VIDEO" 2>/dev/null || stat -f%z "$RAW_VIDEO")
[[ "$RAW_SIZE" -gt 10240 ]] || die "Downloaded video too small (${RAW_SIZE} bytes)"
log "✓ Downloaded: $RAW_VIDEO (${RAW_SIZE} bytes)"

# ── Step 7: Convert to square 1:1 format for Telegram video note ─────────────
log "Step 7: Converting to ${VIDEO_SIZE}x${VIDEO_SIZE} square for Telegram..."
VIDEO_FILE="$TMP_DIR/video_note.mp4"

"$FFMPEG_BIN" -y \
    -i "$RAW_VIDEO" \
    -vf "scale=${VIDEO_SIZE}:${VIDEO_SIZE}:force_original_aspect_ratio=increase,crop=${VIDEO_SIZE}:${VIDEO_SIZE}" \
    -c:v libx264 -preset fast -crf 23 \
    -c:a aac -b:a 64k \
    -t "$DURATION_INT" \
    -movflags +faststart \
    "$VIDEO_FILE" 2>/dev/null

[[ -f "$VIDEO_FILE" ]] || die "FFmpeg square conversion failed"
VIDEO_SIZE_BYTES=$(stat -c%s "$VIDEO_FILE" 2>/dev/null || stat -f%z "$VIDEO_FILE")
log "✓ Final video: $VIDEO_FILE (${VIDEO_SIZE_BYTES} bytes, ${DURATION_INT}s)"

# Telegram video note limit: 50MB
MAX_VIDEO_BYTES=$((50 * 1024 * 1024))
[[ "$VIDEO_SIZE_BYTES" -lt "$MAX_VIDEO_BYTES" ]] || die "Video too large for Telegram (${VIDEO_SIZE_BYTES} > 50MB)"

# ── Step 8: Send as Telegram video note (кружочек) ────────────────────────────
log "Step 8: Sending video note to Telegram (chat=$CHAT_ID)..."

RESPONSE=$(curl -s \
    -X POST "https://api.telegram.org/bot${BOT_TOKEN}/sendVideoNote" \
    -F "chat_id=${CHAT_ID}" \
    -F "video_note=@${VIDEO_FILE}" \
    -F "length=${VIDEO_SIZE}" \
    -F "duration=${DURATION_INT}" 2>&1)

SUCCESS=$(echo "$RESPONSE" | python3 -c "import json,sys; d=json.load(sys.stdin); print(d.get('ok', False))" 2>/dev/null || echo "false")

if [[ "$SUCCESS" == "True" ]]; then
    MSG_ID=$(echo "$RESPONSE" | python3 -c "import json,sys; d=json.load(sys.stdin); print(d['result']['message_id'])" 2>/dev/null || echo "?")
    log "✅ Video note sent! Message ID: $MSG_ID"
    echo "$MSG_ID"
else
    TG_ERR=$(echo "$RESPONSE" | python3 -c "import json,sys; d=json.load(sys.stdin); print(d.get('description','unknown error'))" 2>/dev/null || echo "$RESPONSE")
    die "Telegram API error: $TG_ERR"
fi