#!/usr/bin/env bash
# Check core toolchain: gcc, homebrew, mise, go, node.
# Usage: ./scripts/check-toolchain.sh
set -euo pipefail

RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m'

ok()   { echo -e "  ${GREEN}✓${NC} $1"; }
warn() { echo -e "  ${YELLOW}!${NC} $1"; }
fail() { echo -e "  ${RED}✗${NC} $1"; }

echo "=== Core Toolchain Check ==="
echo ""

# ─── GCC / C Compiler ──────────────────────────────────────────────────
echo "C Compiler:"
if command -v gcc &>/dev/null; then
    gcc_ver=$(gcc --version 2>/dev/null | head -1)
    ok "gcc found: $gcc_ver"
elif command -v cc &>/dev/null; then
    cc_ver=$(cc --version 2>/dev/null | head -1)
    ok "cc found: $cc_ver"
elif command -v clang &>/dev/null; then
    clang_ver=$(clang --version 2>/dev/null | head -1)
    ok "clang found: $clang_ver"
else
    fail "No C compiler found"
    echo "    Install: brew install gcc (macOS) or sudo apt install build-essential (Linux)"
    exit 1
fi

# Verify gcc can compile (catches broken Xcode toolchain on macOS)
tmp_src=$(mktemp /tmp/toolchain_test.XXXXXX.c)
tmp_bin=$(mktemp /tmp/toolchain_test.XXXXXX)
trap 'rm -f "$tmp_src" "$tmp_bin"' EXIT
cat > "$tmp_src" << 'EOF'
int main(void) { return 0; }
EOF

if cc "$tmp_src" -o "$tmp_bin" 2>/dev/null || gcc "$tmp_src" -o "$tmp_bin" 2>/dev/null; then
    ok "gcc can compile test program"
    rm -f "$tmp_bin"
else
    fail "gcc cannot compile — toolchain may be broken"
    echo "    Fix: xcode-select --install (macOS) or reinstall gcc"
    exit 1
fi

echo ""

# ─── Homebrew ──────────────────────────────────────────────────────────
echo "Homebrew:"
if command -v brew &>/dev/null; then
    brew_path=$(which brew)
    ok "brew found at $brew_path"
else
    warn "brew not found"
    if [[ "$(uname)" == "Darwin" ]]; then
        echo "    Install: /bin/bash -c \"\$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)\""
    fi
fi

echo ""

# ─── Mise ──────────────────────────────────────────────────────────────
echo "Mise:"
if command -v mise &>/dev/null; then
    mise_ver=$(mise --version 2>/dev/null)
    ok "mise found: $mise_ver"
else
    warn "mise not found"
    if command -v brew &>/dev/null; then
        echo "    Install: brew install mise"
    else
        echo "    Install: curl https://mise.run | sh"
    fi
fi

echo ""

# ─── Go ────────────────────────────────────────────────────────────────
echo "Go:"
if command -v go &>/dev/null; then
    go_ver=$(go version 2>/dev/null)
    ok "go found: $go_ver"
else
    fail "go not found"
    if command -v mise &>/dev/null; then
        echo "    Install: mise install go"
    else
        echo "    Install: brew install go (macOS) or use mise"
    fi
    exit 1
fi

echo ""

# ─── gopls (Go LSP) ────────────────────────────────────────────────────
echo "gopls (Go language server):"
if command -v gopls &>/dev/null; then
    gopls_ver=$(gopls version 2>/dev/null)
    ok "gopls found: $gopls_ver"
else
    warn "gopls not found (recommended for IDE support)"
    echo "    Install: go install golang.org/x/tools/gopls@latest"
    echo "    (ensure $(go env GOPATH)/bin is in PATH)"
fi

echo ""

# ─── Node ──────────────────────────────────────────────────────────────
echo "Node:"
if command -v node &>/dev/null; then
    node_ver=$(node --version 2>/dev/null)
    ok "node found: $node_ver"
else
    warn "node not found (required only for Electron)"
    if command -v mise &>/dev/null; then
        echo "    Install: mise install node"
    fi
fi

echo ""

# ─── golangci-lint ──────────────────────────────────────────────────────
echo "golangci-lint:"
if command -v golangci-lint &>/dev/null; then
    gcl_ver=$(golangci-lint --version 2>/dev/null)
    ok "golangci-lint found: $gcl_ver"
else
    warn "golangci-lint not found"
    echo "    Install: mise install golangci-lint"
fi

echo ""
echo "=== JS / Node ==="
echo ""

# ─── npm ────────────────────────────────────────────────────────────────
echo "npm:"
if command -v npm &>/dev/null; then
    npm_ver=$(npm --version 2>/dev/null)
    ok "npm found: v$npm_ver"
else
    warn "npm not found"
    echo "    Install: mise install node"
fi

echo ""

# ─── web/ui deps (eslint, globals) ──────────────────────────────────────
echo "web/ui dependencies:"
if [ -d web/ui/node_modules ] && [ -f web/ui/node_modules/.bin/eslint ]; then
    ok "web/ui/node_modules installed"
else
    warn "web/ui/node_modules not installed"
    echo "    Install: cd web/ui && npm install"
fi

echo ""

# ─── electron deps ──────────────────────────────────────────────────────
echo "electron dependencies:"
if [ -d electron/node_modules ] && [ -f electron/node_modules/.bin/electron ]; then
    ok "electron/node_modules installed"
else
    warn "electron/node_modules not installed"
    echo "    Install: cd electron && npm install"
fi

echo ""
echo "=== JS Linting (ESLint) ==="
if [ -f web/ui/node_modules/.bin/eslint ]; then
    ok "ESLint installed at web/ui/node_modules/.bin/eslint"
    eslint_ver=$(cd web/ui && ./node_modules/.bin/eslint --version 2>/dev/null)
    ok "ESLint: $eslint_ver"
else
    warn "ESLint not installed (needed for web UI linting)"
    echo "    Install: cd web/ui && npm install"
fi

echo ""
echo "=== Core toolchain check complete ==="