#!/usr/bin/env bash
# Qwen Code — One-line installer
# Uses wrapper script so env vars work immediately in any shell.
#
# Usage:
#   curl -fsSL -H "Authorization: token TOKEN" \
#     https://git.sensey24.ru/aibot777/unlimitedcoding/raw/branch/master/qwen/uqwen_install.sh \
#     -o /tmp/uqwen.sh && sudo bash /tmp/uqwen.sh
set -euo pipefail

GITEA_TOKEN="${GITEA_TOKEN:-cadffcb0a6a3be728ac1ff619bb40c86588f6837}"
REPO_RAW="https://git.sensey24.ru/aibot777/unlimitedcoding/raw/branch/master/qwen"
REGISTRY_URL="https://npm.sensey24.ru/"
NPM_SCOPE="@qwen-code"
NPM_PACKAGE="@qwen-code/qwen-code"

ENV_FILE="/etc/profile.d/qwen-code.sh"

GREEN="\033[92m"
RED="\033[91m"
CYAN="\033[96m"
YELLOW="\033[93m"
BOLD="\033[1m"
RESET="\033[0m"

log()  { echo -e "${GREEN}[+]${RESET} $*"; }
err()  { echo -e "${RED}[!]${RESET} $*" >&2; }
info() { echo -e "${CYAN}[i]${RESET} $*"; }
warn() { echo -e "${YELLOW}[~]${RESET} $*"; }

create_wrapper() {
    local bin_name="$1"
    local bin_path
    bin_path=$(command -v "$bin_name" 2>/dev/null || echo "/usr/local/bin/$bin_name")

    local npm_root
    npm_root=$(npm root -g 2>/dev/null || echo "/usr/lib/node_modules")

    # Try to resolve real entry point
    local real_bin
    real_bin=$(readlink -f "$bin_path" 2>/dev/null || true)
    if [ -z "$real_bin" ] || [ "$real_bin" = "$bin_path" ] || [ ! -f "$real_bin" ]; then
        # Search in node_modules
        for candidate_pkg in "@qwen-code/qwen-code" "qwen-code"; do
            for entry in "dist/index.js" "bin/index.js" "index.js"; do
                if [ -f "$npm_root/$candidate_pkg/$entry" ]; then
                    real_bin="$npm_root/$candidate_pkg/$entry"
                    break 2
                fi
            done
        done
    fi

    if [ -z "$real_bin" ] || [ ! -f "$real_bin" ]; then
        warn "Could not find $bin_name entry point"
        return 1
    fi

    rm -f "$bin_path"
    cat > "$bin_path" << WEOF
#!/usr/bin/env bash
[ -f $ENV_FILE ] && . $ENV_FILE
exec node "$real_bin" "\$@"
WEOF
    chmod +x "$bin_path"
    log "Wrapper: $bin_path -> $real_bin"
}

echo -e "${BOLD}"
echo "  +--------------------------------------+"
echo "  |    Qwen Code — Installer             |"
echo "  +--------------------------------------+"
echo -e "${RESET}"

# ---- Auto-install prerequisites ----

install_pkg() {
    if command -v apt-get >/dev/null 2>&1; then
        apt-get update -qq && apt-get install -y -qq "$@"
    elif command -v dnf >/dev/null 2>&1; then
        dnf install -y -q "$@"
    elif command -v yum >/dev/null 2>&1; then
        yum install -y -q "$@"
    elif command -v brew >/dev/null 2>&1; then
        brew install "$@"
    else
        err "No package manager found. Install $* manually."
        return 1
    fi
}

if ! command -v python3 &>/dev/null; then
    info "python3 not found, installing..."
    install_pkg python3
fi
log "Python3 $(python3 --version | awk '{print $2}')"

if ! command -v curl &>/dev/null; then
    info "curl not found, installing..."
    install_pkg curl
fi

# Node.js >= 20
install_node() {
    info "Installing Node.js v24.x..."
    if command -v apt-get >/dev/null 2>&1; then
        curl -fsSL https://deb.nodesource.com/setup_24.x | bash - && apt-get install -y nodejs
    elif command -v dnf >/dev/null 2>&1; then
        curl -fsSL https://rpm.nodesource.com/setup_24.x | bash - && dnf install -y nodejs
    elif command -v yum >/dev/null 2>&1; then
        curl -fsSL https://rpm.nodesource.com/setup_24.x | bash - && yum install -y nodejs
    elif command -v brew >/dev/null 2>&1; then
        brew install node
    else
        err "Cannot auto-install Node.js. Install manually: https://nodejs.org/"
        exit 1
    fi
}

if ! command -v node &>/dev/null; then
    install_node
fi

NODE_VER=$(node -v | sed 's/v//' | cut -d. -f1)
if [ "$NODE_VER" -lt 20 ]; then
    warn "Node.js >= 20 required (found v$NODE_VER). Upgrading..."
    install_node
    NODE_VER=$(node -v | sed 's/v//' | cut -d. -f1)
fi
log "Node.js $(node -v)"

# ---- Configure npm registry ----

info "Configuring npm registry: ${REGISTRY_URL}"
npm config set "${NPM_SCOPE}:registry" "${REGISTRY_URL}" 2>/dev/null || true

# ---- Install Qwen Code ----

install_qwen_npm() {
    local attempt=1
    local max_attempts=3
    while [ $attempt -le $max_attempts ]; do
        info "Installing ${NPM_PACKAGE} (attempt ${attempt}/${max_attempts})..."
        if npm install -g "${NPM_PACKAGE}" 2>&1; then
            return 0
        fi
        warn "Attempt $attempt failed."
        attempt=$((attempt + 1))
        [ $attempt -le $max_attempts ] && sleep 3
    done
    return 1
}

QWEN_BIN=""
for candidate in qwen qwen-code; do
    if command -v "$candidate" &>/dev/null; then
        QWEN_BIN="$candidate"
        break
    fi
done

if [ -z "$QWEN_BIN" ]; then
    if ! install_qwen_npm; then
        err "npm install failed after retries."
        err ""
        err "Possible fixes:"
        err "  1. Try HTTP instead of HTTPS:"
        err "     npm config set ${NPM_SCOPE}:registry http://npm.sensey24.ru/"
        err "     npm install -g ${NPM_PACKAGE}"
        err ""
        err "  2. Install from official npm + patch separately:"
        err "     npm install -g ${NPM_PACKAGE}"
        err "     # then re-run this script to apply patches"
        exit 1
    fi
    for candidate in qwen qwen-code; do
        if command -v "$candidate" &>/dev/null; then
            QWEN_BIN="$candidate"
            break
        fi
    done
    log "Qwen Code installed"
else
    log "Qwen Code found: $QWEN_BIN"
fi

# ---- Download and apply patcher ----

INSTALL_DIR=$(mktemp -d)
cleanup() { rm -rf "$INSTALL_DIR" 2>/dev/null || true; }
trap cleanup EXIT

info "Downloading patcher..."
curl -fsSL -H "Authorization: token ${GITEA_TOKEN}" "$REPO_RAW/qwen_patcher.py"   -o "$INSTALL_DIR/qwen_patcher.py"
curl -fsSL -H "Authorization: token ${GITEA_TOKEN}" "$REPO_RAW/qwen_config.json"  -o "$INSTALL_DIR/qwen_config.json"
log "Patcher downloaded"

info "Applying patches (settings + env)..."
python3 "$INSTALL_DIR/qwen_patcher.py" --settings-only --config "$INSTALL_DIR/qwen_config.json"
PATCH_EXIT=$?

if [ $PATCH_EXIT -ne 0 ]; then
    warn "Settings-only patch returned $PATCH_EXIT, trying full patch..."
    python3 "$INSTALL_DIR/qwen_patcher.py" --apply --config "$INSTALL_DIR/qwen_config.json"
fi
log "Patches applied"

# ---- Set environment variables (system-wide) ----

info "Setting environment variables..."
API_KEY=$(python3 -c "import json; print(json.load(open('$INSTALL_DIR/qwen_config.json'))['api_key'])")
BASE_URL=$(python3 -c "import json; print(json.load(open('$INSTALL_DIR/qwen_config.json'))['base_url'])")

ETC_ENV="/etc/environment"
for kv in "QWEN_API_KEY=\"$API_KEY\"" "QWEN_BASE_URL=\"$BASE_URL\""; do
    KEY="${kv%%=*}"
    if grep -q "^${KEY}=" "$ETC_ENV" 2>/dev/null; then
        sed -i "s|^${KEY}=.*|${kv}|" "$ETC_ENV"
    else
        echo "$kv" >> "$ETC_ENV"
    fi
done
log "Env vars written to $ETC_ENV"

cat > "$ENV_FILE" << PROF_EOF
export QWEN_API_KEY="$API_KEY"
export QWEN_BASE_URL="$BASE_URL"
PROF_EOF
chmod 644 "$ENV_FILE"
log "Env file: $ENV_FILE"

# ---- Create wrapper (auto-loads env) ----

info "Creating wrapper..."
if [ -n "$QWEN_BIN" ]; then
    create_wrapper "$QWEN_BIN"
fi

export QWEN_API_KEY="$API_KEY"
export QWEN_BASE_URL="$BASE_URL"

# ---- Verify ----

info "Verifying..."

if [ -n "$QWEN_BIN" ] && "$QWEN_BIN" --version &>/dev/null; then
    VER=$("$QWEN_BIN" --version 2>/dev/null || echo "unknown")
    echo ""
    echo -e "${GREEN}${BOLD}  Qwen Code v$VER installed and patched!${RESET}"
    echo ""
    echo "  Usage:"
    echo "    $QWEN_BIN                        # interactive mode"
    echo "    $QWEN_BIN -p \"Your prompt\"       # single prompt"
    echo ""
    echo "  Env vars auto-loaded by wrapper. Works in any shell."
    echo ""
else
    warn "Qwen binary not found in PATH after install."
    echo "  Check: npm list -g ${NPM_PACKAGE}"
fi