#!/bin/bash
# build_reader.sh — os.meow.reader R1 可复现构建：vendor FreeType(mipsel musl 静态) → 链 reader 二进制
#                  + 宿主 core 单测 + qemu-mipsel FreeType 冒烟。
#
# 产物：
#   reader                          mipsel 静态 ELF（链 meow_ui.a + FreeType + core + engine）
#   test/test_reader_core_host      宿主 core 单测（enc/layout/kinsoku/page/reflow/txt）
#   test/rdft_smoke_mipsel          qemu-mipsel FreeType 封装冒烟
#
# 约束：只写本目录（patch_v2/reader_app/）；不改 sdk/；-Wall -Wextra 0 warning。
# vendor/（FreeType 源码+构建产物）gitignore，不入仓；build 脚本可复现。
set -e
cd "$(dirname "$0")"
ROOT="$HOME/Project/R3ProII"
CC="$ROOT/.tools/zig-mipsel-cc"
SYSROOT="$ROOT/.tools/mipsel-linux-muslsf-cross/mipsel-linux-muslsf"
HOST_CC="${HOST_CC:-gcc}"

FT_VER="2.14.3"
VENDOR="$PWD/vendor"
FT_SRC="$VENDOR/freetype-src"
FT_BUILD="$VENDOR/freetype-build"
FT_INC_SRC="$FT_SRC/include"
FT_INC_BUILD="$FT_BUILD/include"

# ---------- 1) FreeType vendor 拉取 ----------
mkdir -p "$VENDOR"
fetch_freetype() {
  # 优先级：env FREETYPE_SRC → 本目录 vendor 已存在 → /tmp/freetype → 下载
  if [ -n "$FREETYPE_SRC" ] && [ -f "$FREETYPE_SRC/CMakeLists.txt" ]; then
    cp -r "$FREETYPE_SRC" "$FT_SRC"
  elif [ ! -d "$FT_SRC" ] && [ -f /tmp/freetype/CMakeLists.txt ]; then
    cp -r /tmp/freetype "$FT_SRC"
  elif [ ! -d "$FT_SRC" ]; then
    echo "==> downloading freetype $FT_VER"
    rm -rf "$FT_SRC"
    ( cd "$VENDOR" && curl -fsSL -o ft.tar.xz \
        "https://download.savannah.gnu.org/releases/freetype/freetype-$FT_VER.tar.xz" \
      && mkdir -p "$FT_SRC" && tar xf ft.tar.xz -C "$FT_SRC" --strip-components=1 && rm ft.tar.xz )
  fi
  [ -f "$FT_SRC/CMakeLists.txt" ] || { echo "FREETYPE_SRC 不可用/下载失败"; exit 1; }
}
fetch_freetype

# ---------- 2) FreeType mipsel 交叉静态构建（禁用可选项，只要最简） ----------
if [ ! -f "$FT_BUILD/libfreetype.a" ] || [ -n "$FORCE_FT" ]; then
  rm -rf "$FT_BUILD"
  cmake -S "$FT_SRC" -B "$FT_BUILD" \
    -DCMAKE_SYSTEM_NAME=Linux \
    -DCMAKE_C_COMPILER="$CC" \
    -DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY \
    -DCMAKE_BUILD_TYPE=Release \
    -DBUILD_SHARED_LIBS=OFF \
    -DFT_DISABLE_ZLIB=TRUE -DFT_DISABLE_BZIP2=TRUE -DFT_DISABLE_PNG=TRUE \
    -DFT_DISABLE_HARFBUZZ=TRUE -DFT_DISABLE_BROTLI=TRUE \
    >/dev/null
  cmake --build "$FT_BUILD" -j"$(nproc)" >/dev/null 2>&1
fi
[ -f "$FT_BUILD/libfreetype.a" ] || { echo "FreeType build FAILED"; exit 1; }
FT_INCS="-I$FT_BUILD -I$FT_INC_BUILD -I$FT_INC_SRC"
echo "==> freetype.a: $(du -h "$FT_BUILD/libfreetype.a" | cut -f1)"

# ---------- 3) 宿主 core 单测 ----------
echo "==> host core test"
$HOST_CC -O2 -Wall -Wextra -Icore -I. test/test_reader_core.c \
    core/rdenc.c core/rdlayout.c core/rdtxt.c -o test/test_reader_core_host -lm
./test/test_reader_core_host

# ---------- 4) qemu-mipsel FreeType 冒烟 ----------
echo "==> mipsel ft smoke"
$CC -Os -static -Wall -Wextra -Iengine $FT_INCS test/rdft_smoke.c engine/rdft.c \
    "$FT_BUILD/libfreetype.a" -o test/rdft_smoke_mipsel
timeout 120 qemu-mipsel ./test/rdft_smoke_mipsel "${FONT:-$ROOT/font/src/MiSans-Regular.otf}"

# ---------- 4b) qemu-mipsel 书桥全链路冒烟 ----------
echo "==> mipsel book smoke"
$CC -Os -static -Wall -Wextra -Iapp -Icore -Iengine $FT_INCS test/book_smoke.c \
    app/book.c core/rdenc.c core/rdlayout.c core/rdtxt.c engine/rdft.c \
    "$FT_BUILD/libfreetype.a" -o test/book_smoke_mipsel
timeout 120 qemu-mipsel ./test/book_smoke_mipsel "${FONT:-$ROOT/font/src/MiSans-Regular.otf}"

# ---------- 5) reader 二进制（mipsel 静态） ----------
echo "==> reader binary"
CORE="core/rdenc.c core/rdlayout.c core/rdtxt.c"
ENGINE="engine/rdft.c"
APP="app.c app/shelf.c app/reader.c app/book.c app/progress.c"
$CC -Os -static -Wall -Wextra -I../sdk -I. -Icore -Iapp -Iengine $FT_INCS \
    $CORE $APP $ENGINE \
    ../sdk/meow_ui.a "$SYSROOT/lib/libz.a" "$FT_BUILD/libfreetype.a" -lpthread -o reader
ls -la reader
file reader
echo "  运行(qemu): qemu-mipsel ./reader"
echo "build_reader OK"