#!/bin/bash
# NERDLETTER NUMBERS STATION — MAXIMUM RELIABILITY VERSION

MESSAGE="$1"
PAGE="$2"
EPISODE="${3:-01}"
OUTFILE="nerdletter_secret_${EPISODE}_page${PAGE}.mp4"

echo "=== NERDLETTER SECRET TRANSMISSION #${EPISODE} ==="

# 1. Build voice by speaking each letter individually + long pauses between groups
VOICE_TEXT="NERDLETTER SECRET MESSAGE ${EPISODE}. USE DAY BOOK PAGE ${PAGE}."
echo "$VOICE_TEXT" | espeak-ng -ven+f3 -s78 -k60 -a 200 -w intro_voice.wav --punct="" 2>/dev/null

# Add each group letter-by-letter with pauses
for group in $MESSAGE; do
    for ((i=0; i<${#group}; i++)); do
        letter="${group:$i:1}"
        echo "$letter" | espeak-ng -ven+f3 -s72 -k70 -a 210 -w temp_letter.wav --punct="" 2>/dev/null
        cat temp_letter.wav >> groups_voice.wav
        rm -f temp_letter.wav
    done
    # 1-second pause after each group
    ffmpeg -f lavfi -i "anullsrc=r=22050" -t 1.0 silence.wav -y 2>/dev/null
    cat silence.wav >> groups_voice.wav
    rm -f silence.wav
done

# Combine intro + groups
ffmpeg -i intro_voice.wav -i groups_voice.wav -filter_complex "[0:a][1:a]concat=n=2:v=0:a=1" -c:a pcm_s16le -y voice.wav 2>/dev/null

echo "✅ Voice track built letter-by-letter with pauses"

# 2. Mix with tune + static
ffmpeg -i poacher_intro.wav -i static.wav -filter_complex "[0:a][1:a]amix=inputs=2:duration=first" -c:a pcm_s16le -y tune_static.wav 2>/dev/null

ffmpeg -i tune_static.wav -i voice.wav -filter_complex "[0:a][1:a]concat=n=2:v=0:a=1" -c:a pcm_s16le -y final_audio.wav 2>/dev/null

# 3. Video
DUR=45
ffmpeg -f lavfi -i color=black:s=1280x720:d=$DUR -c:v libx264 -t $DUR -pix_fmt yuv420p temp_bg.mp4 -y

ffmpeg -i temp_bg.mp4 -i final_audio.wav \
-vf "drawtext=font='Courier':fontsize=50:fontcolor=green@0.95:text='NERDLETTER SECRET TRANSMISSION #${EPISODE}':x=(w-text_w)/2:y=80, \
drawtext=font='Courier':fontsize=36:fontcolor=green@0.85:text='USE DAY BOOK PAGE ${PAGE}':x=(w-text_w)/2:y=170, \
drawtext=font='Courier':fontsize=44:fontcolor=lime@0.95:text='${MESSAGE}':x=(w-text_w)/2:y=270:box=1:boxcolor=black@0.75:boxborderw=15, \
drawtext=font='Courier':fontsize=30:fontcolor=green@0.75:text='DESTROY PAGE AFTER USE — SUBSCRIBERS ONLY':x=(w-text_w)/2:y=640" \
-c:v libx264 -c:a aac -shortest "$OUTFILE" -y

# Cleanup
rm -f intro_voice.wav groups_voice.wav tune_static.wav temp_bg.mp4

echo "✅ DONE! → ${OUTFILE}"