#!/usr/bin/env bash
# Build the WaveWarZ clip: a title card, then the edited battle moment with
# burned-in captions and an @wavewarz tag.
#
# All CUES/KEEP times live in clip.wav coordinates, which start SRC_OFF seconds
# into the downloaded window. Nothing else in the pipeline knows about that
# offset, so it is applied here once.
set -euo pipefail
cd "$(dirname "$0")"

SRC=vid_v2855698113_2560.mp4
SRC_OFF=17.5
FONT=/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf
GREEN=0x69FF81          # sampled off the stream's own background
W=720; H=1280; FPS=30

# KEEP, shifted into source coordinates
A_IN=$(python3 -c "print(17.5+0.00)"); A_OUT=$(python3 -c "print(17.5+23.52)")
B_IN=$(python3 -c "print(17.5+34.92)"); B_OUT=$(python3 -c "print(17.5+62.40)")

python3 make_srt.py clip.srt

# ---- title card -----------------------------------------------------------
card() {
  local y=$1 size=$2 color=$3 text=$4
  echo "drawtext=fontfile=${FONT}:text='${text}':fontcolor=${color}:fontsize=${size}:x=(w-text_w)/2:y=${y}"
}
FILT_CARD="$(card 300 74 ${GREEN} 'WAVEWARZ'),\
$(card 392 30 0xBBBBBB 'SONG VS. SONG  ·  AUG 25'),\
$(card 560 44 0xFFFFFF 'Hypnotic'),\
$(card 626 30 0x888888 'vs'),\
$(card 682 44 0xFFFFFF 'Dolphin Flippin'),\
$(card 748 28 0x888888 'both by geekmyth'),\
$(card 900 30 0xBBBBBB '0.111 SOL IN PLAY'),\
$(card 946 52 ${GREEN} 'DECIDED BY 0.001'),\
$(card 1150 26 0x888888 '@wavewarz')"

ffmpeg -v error -y \
  -f lavfi -i "color=c=black:s=${W}x${H}:r=${FPS}:d=4" \
  -f lavfi -i "anullsrc=channel_layout=stereo:sample_rate=44100:d=4" \
  -vf "${FILT_CARD}" \
  -c:v libx264 -preset veryfast -crf 20 -pix_fmt yuv420p -profile:v high -level 4.0 \
  -c:a aac -b:a 128k -ar 44100 -ac 2 -shortest card.mp4

# ---- body -----------------------------------------------------------------
# force_style sizes are in the subtitle script's own coordinate space, and an
# SRT has no header so libass falls back to PlayResY=288 — not the 1280 of the
# video. Everything here is therefore written as (pixels * 288 / 1280).
STYLE="FontName=DejaVu Sans,Fontsize=10,Bold=1,PrimaryColour=&H00FFFFFF,\
OutlineColour=&H00000000,BorderStyle=1,Outline=1,Shadow=0,Alignment=2,MarginV=30"

ffmpeg -v error -y -i "${SRC}" -filter_complex "\
[0:v]trim=${A_IN}:${A_OUT},setpts=PTS-STARTPTS[v0];\
[0:a]atrim=${A_IN}:${A_OUT},asetpts=PTS-STARTPTS,afade=t=out:st=23.22:d=0.3[a0];\
[0:v]trim=${B_IN}:${B_OUT},setpts=PTS-STARTPTS[v1];\
[0:a]atrim=${B_IN}:${B_OUT},asetpts=PTS-STARTPTS,afade=t=in:st=0:d=0.3[a1];\
[v0][a0][v1][a1]concat=n=2:v=1:a=1[v][a];\
[v]subtitles=clip.srt:force_style='${STYLE}'[vs];\
[vs]drawtext=fontfile=${FONT}:text='@wavewarz':fontcolor=white@0.85:fontsize=28:\
box=1:boxcolor=black@0.45:boxborderw=10:x=w-text_w-26:y=26[vout]" \
  -map "[vout]" -map "[a]" \
  -c:v libx264 -preset veryfast -crf 20 -pix_fmt yuv420p -profile:v high -level 4.0 \
  -r ${FPS} -c:a aac -b:a 128k -ar 44100 -ac 2 body.mp4

# ---- join -----------------------------------------------------------------
printf "file '%s'\nfile '%s'\n" "$PWD/card.mp4" "$PWD/body.mp4" > concat.txt
ffmpeg -v error -y -f concat -safe 0 -i concat.txt -c copy wavewarz-flippening.mp4

ffprobe -v error -show_entries format=duration,size -show_entries stream=width,height,codec_name \
  -of default=nw=1 wavewarz-flippening.mp4