#!/usr/bin/env bash
set -euo pipefail

ROOT_DIR="$(
    cd -- "$(dirname -- "${BASH_SOURCE[0]}")"
    pwd
)"

CORE_DIR="$ROOT_DIR/third_party/NP2kai/sdl"

# Apply the small PS4-specific core patch before validating or compiling.
"$ROOT_DIR/tools/apply-np2kai-patches.sh"

MAKEFILE="$CORE_DIR/Makefile.libretro"
LOG_FILE="$ROOT_DIR/np2kai-ps4-core-build.log"
BUILD_JOBS="${NP2KAI_BUILD_JOBS:-1}"

if [[ ! "$BUILD_JOBS" =~ ^[1-9][0-9]*$ ]]; then
    echo "ERROR: NP2KAI_BUILD_JOBS debe ser un entero mayor que cero."
    exit 1
fi

if [[ -z "${OO_PS4_TOOLCHAIN:-}" ]]; then
    echo "ERROR: OO_PS4_TOOLCHAIN is not set."
    echo 'Run: export OO_PS4_TOOLCHAIN="$HOME/Dev/PS4/OpenOrbis/PS4Toolchain"'
    exit 1
fi

if [[ ! -d "$OO_PS4_TOOLCHAIN/include" ]]; then
    echo "ERROR: Invalid OpenOrbis toolchain: $OO_PS4_TOOLCHAIN"
    exit 1
fi

for tool in clang clang++ make python3; do
    if ! command -v "$tool" >/dev/null 2>&1; then
        echo "ERROR: Required tool not found: $tool"
        exit 1
    fi
done

if command -v llvm-ar >/dev/null 2>&1; then
    AR_BIN="$(command -v llvm-ar)"
elif command -v ar >/dev/null 2>&1; then
    AR_BIN="$(command -v ar)"
else
    echo "ERROR: Neither llvm-ar nor ar was found."
    exit 1
fi

# Remove the reject left by the first patch attempt.
rm -f "$MAKEFILE.rej"

if ! grep -q 'platform), ps4' "$MAKEFILE"; then
    echo "Adding OpenOrbis platform block while preserving line endings..."

    MAKEFILE_PATH="$MAKEFILE" python3 <<'PY'
from pathlib import Path
import os
import re
import sys

path = Path(os.environ["MAKEFILE_PATH"])
raw = path.read_bytes()

# Preserve the Makefile's existing newline convention.
newline = b"\r\n" if b"\r\n" in raw else b"\n"

anchor_re = re.compile(
    rb"(?m)^# PS2\r?\n"
    rb"else ifeq \(\$\(platform\), ps2\)\r?\n"
)

match = anchor_re.search(raw)

if match is None:
    print("ERROR: Could not locate the PS2 platform block.", file=sys.stderr)
    sys.exit(1)

lines = [
    b"# PS4 / OpenOrbis",
    b"else ifeq ($(platform), ps4)",
    b"\tifeq ($(OO_PS4_TOOLCHAIN),)",
    b"\t\t$(error OO_PS4_TOOLCHAIN must point to the OpenOrbis PS4Toolchain directory)",
    b"\tendif",
    b"",
    b"\tTARGET := $(TARGET_NAME)_libretro_ps4.a",
    b"",
    b"\tCC = clang",
    b"\tCXX = clang++",
    b"\tAR = llvm-ar",
    b"",
    b"\t# PS4 is little-endian x86-64. Build PIC for the PIE eboot.",
    b"\tENDIANNESS_DEFINES := -DLSB_FIRST -DLOCAL_LE=1",
    b"\tPLATFORM_DEFINES := -D__ORBIS__ -D__PS4__ -DORBIS -DPS4",
    b"\tPLATFORM_DEFINES += --target=x86_64-pc-freebsd12-elf",
    b"\tPLATFORM_DEFINES += -isysroot $(OO_PS4_TOOLCHAIN)",
    b"\tPLATFORM_DEFINES += -isystem $(OO_PS4_TOOLCHAIN)/include",
    b"\tPLATFORM_DEFINES += -funwind-tables",
    b"",
    b"\t# Only C++ translation units need the libc++ headers.",
    b"\tCXXFLAGS += -isystem $(OO_PS4_TOOLCHAIN)/include/c++/v1",
    b"",
    b"\tfpic := -fPIC",
    b"\tSTATIC_LINKING = 1",
    b"\tDISABLE_GCC_SECURITY_FLAGS = 1",
    b"",
    b"\t# First portability pass: avoid thread/async dependencies.",
    b"\tSUPPORT_NP2_THREAD = 0",
    b"\tSUPPORT_ASYNC_CPU = 0",
    b"",
]

block = newline.join(lines) + newline
patched = raw[:match.start()] + block + raw[match.start():]

path.write_bytes(patched)

print(
    "Inserted PS4 platform block using "
    + ("CRLF" if newline == b"\r\n" else "LF")
    + " line endings."
)
PY
fi

if ! grep -q 'platform), ps4' "$MAKEFILE"; then
    echo "ERROR: The PS4 platform block is still missing."
    exit 1
fi

exec > >(tee "$LOG_FILE") 2>&1

echo "== NP2kai PS4 static-core build =="
echo "Toolchain : $OO_PS4_TOOLCHAIN"
echo "Compiler  : $(command -v clang)"
echo "C++       : $(command -v clang++)"
echo "Archiver  : $AR_BIN"
echo "Core dir  : $CORE_DIR"
echo "Jobs      : $BUILD_JOBS"
echo

cd "$CORE_DIR"

# Serial first build: keep the first portability error readable.
make -f Makefile.libretro \
    platform=ps4 \
    NP2KAI_VERSION=rev.22 \
    NP2KAI_HASH=e2dc904 \
    CC=clang \
    CXX=clang++ \
    AR="$AR_BIN" \
    clean

make -f Makefile.libretro \
    platform=ps4 \
    NP2KAI_VERSION=rev.22 \
    NP2KAI_HASH=e2dc904 \
    CC=clang \
    CXX=clang++ \
    AR="$AR_BIN" \
    -j"$BUILD_JOBS"

TARGET="$CORE_DIR/np2kai_libretro_ps4.a"

echo
echo "== Result =="

if [[ ! -f "$TARGET" ]]; then
    echo "ERROR: Build finished without producing $TARGET"
    exit 1
fi

file "$TARGET"
ls -lh "$TARGET"

echo
echo "First archive members:"
"$AR_BIN" t "$TARGET" | head -20 || true

echo
echo "SUCCESS: $TARGET"