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

ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
DOWNLOAD_DIR="$ROOT_DIR/downloads"
TOOLS_DIR="$ROOT_DIR/tools"
MICROMAMBA_DIR="$TOOLS_DIR/micromamba"
MICROMAMBA_BIN="$MICROMAMBA_DIR/bin/micromamba"
ENV_DIR="$TOOLS_DIR/linux-build-env"

mkdir -p "$DOWNLOAD_DIR" "$TOOLS_DIR" "$MICROMAMBA_DIR"

if [[ ! -x "$MICROMAMBA_BIN" ]]; then
  echo "[setup] 下载 Linux micromamba 二进制包..."
  ARCHIVE="$DOWNLOAD_DIR/micromamba-linux-64.tar.bz2"
  curl -L --fail -o "$ARCHIVE" "https://micro.mamba.pm/api/micromamba/linux-64/latest"
  tar -xjf "$ARCHIVE" -C "$MICROMAMBA_DIR" bin/micromamba
fi

if [[ ! -x "$ENV_DIR/bin/cmake" || ! -x "$ENV_DIR/bin/ninja" || ! -x "$ENV_DIR/bin/clang++" ]]; then
  echo "[setup] 在项目目录内创建 Linux 二进制构建环境..."
  "$MICROMAMBA_BIN" create -y -p "$ENV_DIR" -c conda-forge \
    cmake ninja clangxx qt-main opencv pkg-config
fi

# README 中约定的路径，使用软链接指向隔离环境，便于 CMake 查找。
ln -sfn "linux-build-env" "$TOOLS_DIR/compiler-linux"
ln -sfn "linux-build-env" "$TOOLS_DIR/cmake-linux"
ln -sfn "linux-build-env" "$TOOLS_DIR/ninja-linux"
ln -sfn "linux-build-env" "$TOOLS_DIR/python-bin"
ln -sfn "linux-build-env" "$TOOLS_DIR/python-venv"
ln -sfn "../tools/linux-build-env" "$ROOT_DIR/third_party/qt-linux"
ln -sfn "../tools/linux-build-env" "$ROOT_DIR/third_party/opencv-linux"

echo "[setup] 完成。所有 Linux 构建工具位于：$ENV_DIR"