#!/usr/bin/env bash
# Compila o Zemeroth (Andrey Lesnikov; Rust + macroquad 0.3.7; MIT ou Apache-2.0) para WebAssembly, no commit fae7d89,
# como o utils/wasm/build.sh do autor:
#   cargo build --locked --release --target wasm32-unknown-unknown   (Cargo.lock do autor, Rust 1.74.1)
# Os sprites (assets/img) nao estao no repositorio: saem de assets_src/atlas.svg com o resvg, como o
# utils/assets_export.sh (resvg 0.20.0, --zoom=12; o resvg 0.45 ignora a posicao do objeto com --zoom e gera PNG vazio).
# A pagina (zemeroth/index.html, start.js) e nossa: no lugar do index.html do autor, que busca o gl.js num site de
# terceiros, ela usa o gl.js do proprio crate sapp-wasm 0.1.26 (o mesmo que o miniquad-samples serve). O logotipo
# zemeroth.svg do repositorio (baseado na fonte "Old London", licenca incerta) nao entra. O codigo do jogo nao muda.
#
#   src/FredGames.Bundler/Builds/build-zemeroth.sh
#
# Saida: artifacts/build/zemeroth/{dist/, zemeroth-<commit>-dist.tar.gz, zemeroth-licenses.txt}.
# O .tar.gz tem que sair igual em dois builds seguidos (CODEGEN_UNITS=1 e caminhos remapeados).

set -euo pipefail

here="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
root="$(git -C "$here" rev-parse --show-toplevel 2>/dev/null || pwd)"
cache="$root/artifacts/build/cache"
tools="$root/artifacts/tools"
mkdir -p "$cache"

export RUSTUP_HOME="$tools/rustup" CARGO_HOME="$tools/cargo"
export PATH="$CARGO_HOME/bin:$PATH"
TOOLCHAIN=1.74.1
RESVG=0.20.0
COMMIT=fae7d89abe9702b25729453395e46fce105debbd
SHA256=c1a74bf0c1fa3339581df0f09f0d53960c9b7556a3fc3ba59d3204ac1db54a2f

fetch() { # url arquivo sha256
  if [ ! -f "$cache/$2" ]; then
    curl -fsSL --retry 4 "$1" -o "$cache/$2.partial" && mv "$cache/$2.partial" "$cache/$2"
  fi
  echo "$3  $cache/$2" | shasum -a 256 -c - >/dev/null
}

slug=zemeroth
out="$root/artifacts/build/$slug" tree="$root/artifacts/build/$slug/tree"
fetch "https://github.com/ozkriff/zemeroth/archive/$COMMIT.tar.gz" "$slug-${COMMIT:0:7}.tar.gz" "$SHA256"
rustup toolchain install "$TOOLCHAIN" --profile minimal --target wasm32-unknown-unknown >/dev/null 2>&1
export RUSTUP_TOOLCHAIN="$TOOLCHAIN"
if [ ! -x "$tools/resvg-$RESVG/bin/resvg" ]; then
  cargo install --locked "resvg@$RESVG" --root "$tools/resvg-$RESVG" >/dev/null 2>&1
fi

rm -rf "$out"; mkdir -p "$tree" "$out/dist"
tar -xzf "$cache/$slug-${COMMIT:0:7}.tar.gz" -C "$tree" --strip-components 1

( cd "$tree"
  PATH="$tools/resvg-$RESVG/bin:$PATH" sh utils/assets_export.sh >/dev/null 2>&1
  CARGO_INCREMENTAL=0 CARGO_PROFILE_RELEASE_CODEGEN_UNITS=1 \
    RUSTFLAGS="--remap-path-prefix=$tree=/src --remap-path-prefix=$CARGO_HOME=/cargo" \
    cargo build --locked --release --target wasm32-unknown-unknown 2> "$out/cargo.log" \
    || { tail -40 "$out/cargo.log"; exit 1; }
  cp target/wasm32-unknown-unknown/release/zemeroth.wasm "$out/dist/"
  cargo metadata --locked --format-version 1 --filter-platform wasm32-unknown-unknown 2>/dev/null > "$out/metadata.json"
  gl="$(python3 -I -c "
import json,sys,os
m=json.load(open('$out/metadata.json'))
p=next(p for p in m['packages'] if p['name']=='sapp-wasm')
print(os.path.join(os.path.dirname(p['manifest_path']),'js','gl.js'))")"
  cp "$gl" "$out/dist/gl.js"
  python3 -I "$here/gridbugs/rust-licenses.py" zemeroth "$out/crates.txt" < "$out/metadata.json" )

mkdir -p "$out/dist/assets/img"
cp "$tree"/assets/*.ron "$tree/assets/OpenSans-Regular.ttf" "$out/dist/assets/"
cp "$tree"/assets/img/*.png "$out/dist/assets/img/"
cp "$here/zemeroth/index.html" "$here/zemeroth/start.js" "$out/dist/"

{
  echo "Zemeroth - licences of the build"
  echo "================================"
  echo
  echo "Source: https://github.com/ozkriff/zemeroth at commit $COMMIT, licensed under the MIT License or the Apache License 2.0,"
  echo "at the user's option (LICENSE-MIT, LICENSE-APACHE). The pictures are drawn by the author (assets_src/atlas.svg) and"
  echo "exported by the build; the text font is Open Sans (Apache License 2.0)."
  echo
  for f in LICENSE-MIT LICENSE-APACHE; do
    echo "------------------------------------------------------------------------"
    echo "$f"
    echo "------------------------------------------------------------------------"
    cat "$tree/$f"; echo
  done
  echo "========================================================================"
  cat "$out/crates.txt"
} > "$out/$slug-licenses.txt"

find "$out/dist" -exec touch -t 202511010000 {} +
( cd "$out" && find dist -type f | LC_ALL=C sort > files.txt \
  && COPYFILE_DISABLE=1 tar --format=ustar --uid 0 --gid 0 --uname root --gname root -n -cf - -T files.txt \
  | gzip -n -9 > "$slug-${COMMIT:0:7}-dist.tar.gz" && rm files.txt )
rm -rf "$tree" "$out/metadata.json"
ls -l "$out/$slug-${COMMIT:0:7}-dist.tar.gz"
shasum -a 256 "$out/$slug-${COMMIT:0:7}-dist.tar.gz" "$out/$slug-licenses.txt" "$out/dist/zemeroth.wasm"