#!/bin/bash
# fetch-components.sh — Download Tiny Core ISO and KubeSolo binary
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
CACHE_DIR="${CACHE_DIR:-$PROJECT_ROOT/build/cache}"

# Load versions
# shellcheck source=../config/versions.env
. "$SCRIPT_DIR/../config/versions.env"

mkdir -p "$CACHE_DIR"

# --- Tiny Core Linux ISO ---
TC_ISO="$CACHE_DIR/$TINYCORE_ISO"
TC_URL="${TINYCORE_MIRROR}/${TINYCORE_VERSION%%.*}.x/${TINYCORE_ARCH}/release/${TINYCORE_ISO}"

if [ -f "$TC_ISO" ]; then
    echo "==> Tiny Core ISO already cached: $TC_ISO"
else
    echo "==> Downloading Tiny Core Linux ${TINYCORE_VERSION} (${TINYCORE_ARCH})..."
    echo "    URL: $TC_URL"
    wget -q --show-progress -O "$TC_ISO" "$TC_URL" || {
        # Fallback: try alternate mirror structure
        TC_URL_ALT="${TINYCORE_MIRROR}/${TINYCORE_VERSION%%.*}.x/${TINYCORE_ARCH}/release/CorePure64-current.iso"
        echo "    Primary URL failed, trying: $TC_URL_ALT"
        wget -q --show-progress -O "$TC_ISO" "$TC_URL_ALT"
    }
    echo "==> Downloaded: $TC_ISO ($(du -h "$TC_ISO" | cut -f1))"
fi

# --- KubeSolo ---
KUBESOLO_INSTALLER="$CACHE_DIR/install-kubesolo.sh"
KUBESOLO_BIN="$CACHE_DIR/kubesolo"

if [ -f "$KUBESOLO_BIN" ]; then
    echo "==> KubeSolo binary already cached: $KUBESOLO_BIN"
else
    echo "==> Downloading KubeSolo installer..."
    curl -sfL "$KUBESOLO_INSTALL_URL" -o "$KUBESOLO_INSTALLER"

    echo "==> Extracting KubeSolo binary..."
    echo "    NOTE: The installer normally runs 'install'. We extract the binary URL instead."
    echo "    For Phase 1 PoC, install KubeSolo on a host and copy the binary."
    echo ""
    echo "    Manual step required:"
    echo "    1. On a Linux x86_64 host: curl -sfL https://get.kubesolo.io | sudo sh -"
    echo "    2. Copy /usr/local/bin/kubesolo to: $KUBESOLO_BIN"
    echo "    3. Re-run: make rootfs"
    echo ""

    # Try to extract download URL from installer script
    BINARY_URL=$(grep -oP 'https://[^ ]+kubesolo[^ ]+' "$KUBESOLO_INSTALLER" 2>/dev/null | head -1 || true)
    if [ -n "$BINARY_URL" ]; then
        echo "    Attempting direct download from: $BINARY_URL"
        curl -sfL "$BINARY_URL" -o "$KUBESOLO_BIN" && chmod +x "$KUBESOLO_BIN" || {
            echo "    Direct download failed. Use manual step above."
        }
    fi

    if [ -f "$KUBESOLO_BIN" ]; then
        echo "==> KubeSolo binary: $KUBESOLO_BIN ($(du -h "$KUBESOLO_BIN" | cut -f1))"
    fi
fi

# --- Summary ---
echo ""
echo "==> Component cache:"
ls -lh "$CACHE_DIR"/ 2>/dev/null || true
echo ""
echo "==> Fetch complete."