build

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

# ==============================
# CONFIG
# ==============================
APP_NAME="flutter-tool"
OUTPUT_DIR="./bin"
TARGET_OS="linux"
TARGET_ARCH="arm64"

# ==============================
# COLORS
# ==============================
BLUE="\033[1;34m"
GREEN="\033[1;32m"
RED="\033[1;31m"
YELLOW="\033[1;33m"
NC="\033[0m"
BOLD="\033[1m"

echo -e "${BLUE}${BOLD}🚀 Flutter Tool ARM Production Builder${NC}"
echo "----------------------------------------"

# ==============================
# CHECK GO INSTALL
# ==============================
if ! command -v go &>/dev/null; then
    echo -e "${RED}❌ Go is not installed.${NC}"
    exit 1
fi

# ==============================
# CLEAN
# ==============================
clean_module() {
    echo -e "${YELLOW}${BOLD}🧹 Cleaning previous build artifacts...${NC}"

    # Remove any existing binaries inside OUTPUT_DIR if it exists
    if [ -d "$OUTPUT_DIR" ]; then
        BIN_COUNT=$(find "$OUTPUT_DIR" -maxdepth 1 -type f | wc -l)
        if [ "$BIN_COUNT" -gt 0 ]; then
            echo -e "${YELLOW}⚠ Removing $BIN_COUNT existing file(s) in $OUTPUT_DIR/${NC}"
            find "$OUTPUT_DIR" -maxdepth 1 -type f -delete
            echo -e "${GREEN}✔ $OUTPUT_DIR/ cleared${NC}"
        else
            echo -e "${GREEN}✔ $OUTPUT_DIR/ already empty${NC}"
        fi
    fi

    # Clean Go build cache
    go clean -cache -modcache -testcache
    echo -e "${GREEN}✔ Go cache cleared${NC}"

    # Remove go.mod and go.sum for a truly fresh init
    for f in go.mod go.sum; do
        if [ -f "$f" ]; then
            rm -f "$f"
            echo -e "${GREEN}✔ Removed $f${NC}"
        fi
    done

    echo "----------------------------------------"
}

# ==============================
# INIT MODULE + DEP
# ==============================
init_module() {
    echo -e "${BLUE}${BOLD}📦 Initialising Go module...${NC}"

    go mod init flutter-tool
    echo -e "${GREEN}✔ go.mod created${NC}"

    echo -e "${BLUE}📥 Installing dependencies...${NC}"
    go mod tidy
}

# ==============================
# BUILD
# ==============================
build_binary() {

    mkdir -p "$OUTPUT_DIR"
    OUTPUT_PATH="${OUTPUT_DIR}/${APP_NAME}"

    echo -e "\n${BLUE}${BOLD}🔨 Building ${TARGET_OS}/${TARGET_ARCH}...${NC}"

    CGO_ENABLED=0 GOOS="$TARGET_OS" GOARCH="$TARGET_ARCH" \
        go build -ldflags="-s -w" -o "$OUTPUT_PATH" .

    if [ -f "$OUTPUT_PATH" ]; then
        echo -e "\n${GREEN}${BOLD}✅ BUILD SUCCESS${NC}"
        echo "----------------------------------------"
        ls -lh "$OUTPUT_PATH"
        echo "----------------------------------------"
        echo -e "🧪 Test on ARM:"
        echo -e "  ${OUTPUT_PATH} --version"
    else
        echo -e "${RED}❌ Build failed${NC}"
        exit 1
    fi
}

# ==============================
# INSTALL
# ==============================
install_global() {

    CURRENT_OS="$(uname -s)"

    if [[ "$CURRENT_OS" != MINGW* && \
          "$CURRENT_OS" != MSYS* && \
          "$CURRENT_OS" != CYGWIN* ]]; then

        echo -e "\n${YELLOW}📦 Install globally? (y/n)${NC}"
        read -r choice

        if [[ "$choice" == "y" ]]; then

            TARGET_PATH="/usr/local/bin/${APP_NAME}"

            # Remove old global binary if exists
            if [ -f "$TARGET_PATH" ]; then
                echo -e "${YELLOW}⚠ Removing old installed binary: $TARGET_PATH${NC}"
                sudo rm -f "$TARGET_PATH"
            fi

            sudo cp "${OUTPUT_DIR}/${APP_NAME}" "$TARGET_PATH"
            sudo chmod +x "$TARGET_PATH"

            echo -e "${GREEN}✔ Installed to $TARGET_PATH${NC}"
        fi
    fi
}

# ==============================
# MAIN
# ==============================
clean_module
init_module
build_binary
install_global

echo -e "\n${GREEN}${BOLD}🎉 ARM Build Ready & Clean.${NC}"