#!/bin/bash
set -e

LIB_DIR="lib"

echo "=== Fetching library dependencies ==="

# 1. Sokol (single-file headers)
mkdir -p "$LIB_DIR/sokol"
mkdir -p "$LIB_DIR/imgui"
mkdir -p "$LIB_DIR/util"

if [ ! -f "$LIB_DIR/sokol/sokol_gfx.h" ]; then
    echo "  > Fetching sokol (pinned to emdawnwebgpu-compatible version)..."
    git clone --depth 500 https://github.com/floooh/sokol.git "$LIB_DIR/sokol_tmp"
    git -C "$LIB_DIR/sokol_tmp" checkout 36debc7
    cp "$LIB_DIR/sokol_tmp"/*.h "$LIB_DIR/sokol/"
    cp "$LIB_DIR/sokol_tmp"/util/*.h "$LIB_DIR/util/" 2>/dev/null || true
    rm -rf "$LIB_DIR/sokol_tmp"
else
    echo "  > Sokol already present"
fi

# 2. Dear ImGui
if [ ! -f "$LIB_DIR/imgui/imgui/imgui.cpp" ]; then
    echo "  > Fetching Dear ImGui..."
    mkdir -p "$LIB_DIR/imgui/imgui"
    git clone --depth 1 --branch v1.92.7-docking https://github.com/ocornut/imgui.git "$LIB_DIR/imgui_src"
    cp "$LIB_DIR/imgui_src"/*.cpp "$LIB_DIR/imgui/imgui/"
    cp "$LIB_DIR/imgui_src"/*.h "$LIB_DIR/imgui/imgui/"
    rm -rf "$LIB_DIR/imgui_src"
else
    echo "  > Dear ImGui already present"
fi

# 3. cimgui
if [ ! -f "$LIB_DIR/imgui/cimgui.cpp" ]; then
    echo "  > Fetching cimgui..."
    git clone --depth 1 https://github.com/cimgui/cimgui.git "$LIB_DIR/cimgui_tmp"
    cp "$LIB_DIR/cimgui_tmp/cimgui.h" "$LIB_DIR/imgui/"
    cp "$LIB_DIR/cimgui_tmp/cimgui.cpp" "$LIB_DIR/imgui/"
    cp "$LIB_DIR/cimgui_tmp/cimconfig.h" "$LIB_DIR/imgui/"
    cp "$LIB_DIR/cimgui_tmp/cimgui_impl.h" "$LIB_DIR/imgui/"
    cp "$LIB_DIR/cimgui_tmp/cimgui_impl.cpp" "$LIB_DIR/imgui/"
    rm -rf "$LIB_DIR/cimgui_tmp"
else
    echo "  > cimgui already present"
fi

echo "=== Done ==="