#!/usr/bin/env bash
# Qwen Code — One-line installer
# 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"

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} $*"; }

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
}

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

# curl
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 ${NPM_PACKAGE}"
        err "     # then re-run this script to apply patches"
        exit 1
    fi
    # Find the binary after install
    for candidate in qwen qwen-code; do
        if command -v "$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 ----

info "Setting environment variables..."
ENV_VARS='export QWEN_API_KEY="ClauderAPI"
export QWEN_BASE_URL="https://ai.37-187-136-86.sslip.io"'

for rc_file in "$HOME/.bashrc" "$HOME/.zshrc"; do
    if [ -f "$rc_file" ]; then
        if ! grep -q 'QWEN_API_KEY' "$rc_file" 2>/dev/null; then
            echo "" >> "$rc_file"
            echo "# Qwen Code (UnlimitedCoding)" >> "$rc_file"
            echo "$ENV_VARS" >> "$rc_file"
            log "Added env vars to $(basename "$rc_file")"
        fi
    fi
done

export QWEN_API_KEY="ClauderAPI"
export QWEN_BASE_URL="https://ai.37-187-136-86.sslip.io"

# Also for all users if root
if [ "$(id -u)" -eq 0 ]; then
    PROFILE_D="/etc/profile.d/qwen-code.sh"
    cat > "$PROFILE_D" << 'PROF_EOF'
# Qwen Code (UnlimitedCoding)
export QWEN_API_KEY="ClauderAPI"
export QWEN_BASE_URL="https://ai.37-187-136-86.sslip.io"
PROF_EOF
    chmod 644 "$PROFILE_D"
    log "Set env vars for all users: $PROFILE_D"
fi

# ---- Verify ----

info "Verifying..."
echo ""

if [ -n "$QWEN_BIN" ]; then
    RESULT=$(timeout 30 "$QWEN_BIN" -p "Reply with just OK" 2>&1 || true)
    if echo "$RESULT" | grep -qi "OK"; then
        echo ""
        echo -e "${GREEN}${BOLD}  Qwen Code installed and patched!${RESET}"
        echo ""
        echo "  Usage:"
        echo "    $QWEN_BIN                        # interactive mode"
        echo "    $QWEN_BIN -p \"Your prompt\"       # single prompt"
        echo ""
        echo "  Models:"
        echo "    qwen3.5-plus, qwen3-coder-plus"
        echo "    qwen3-coder-flash, coder-model"
        echo ""
        echo "  If env vars not active, run: source ~/.bashrc"
        echo ""
    else
        warn "Patches applied but test prompt failed."
        echo "  Response: $RESULT"
        echo ""
        echo "  Try manually:"
        echo "    source ~/.bashrc"
        echo "    $QWEN_BIN -p 'Hello'"
    fi
else
    warn "Qwen binary not found in PATH after install."
    echo "  Check: npm list -g ${NPM_PACKAGE}"
    echo "  Then run: source ~/.bashrc && qwen -p 'Hello'"
fi