#!/bin/bash
set -euo pipefail

# InternalAI Platform Installer
# Usage: bash <(curl -fsSL https://gitea.app.monadical.io/monadical/internalai-setup/raw/branch/main/install.sh)

# ============================================================================
# Configuration
# ============================================================================

SETUP_URL="https://gitea.app.monadical.io/monadical/internalai-setup/raw/branch/main/setup.sh"
INSTALLER_VERSION="1.0.0"

# Colors
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m'

# ============================================================================
# Logging Functions
# ============================================================================

log_info() {
    echo -e "${BLUE}ℹ${NC} $1"
}

log_success() {
    echo -e "${GREEN}✓${NC} $1"
}

log_warning() {
    echo -e "${YELLOW}⚠${NC} $1"
}

log_error() {
    echo -e "${RED}✗${NC} $1"
}

log_header() {
    echo ""
    echo -e "${BLUE}═══════════════════════════════════════════════════════════${NC}"
    echo -e "${BLUE}  $1${NC}"
    echo -e "${BLUE}═══════════════════════════════════════════════════════════${NC}"
    echo ""
}

# ============================================================================
# Installer Functions
# ============================================================================

check_requirements() {
    log_header "Checking Requirements"

    # Check curl
    if command -v curl &> /dev/null; then
        log_success "curl is installed"
    else
        log_error "curl is required but not installed"
        log_info "Install curl and try again:"
        if [[ "$OSTYPE" == "darwin"* ]]; then
            log_info "  brew install curl"
        else
            log_info "  sudo apt-get install curl  # Debian/Ubuntu"
            log_info "  sudo yum install curl      # RHEL/CentOS"
        fi
        exit 1
    fi

    # Check bash version
    if [ "${BASH_VERSINFO[0]}" -lt 4 ]; then
        log_warning "Bash version ${BASH_VERSION} detected. Version 4+ recommended."
    else
        log_success "bash ${BASH_VERSION} is installed"
    fi
}

download_and_run_setup() {
    log_header "Downloading Setup Script"

    # Create temporary file
    TMP_FILE=$(mktemp)
    trap "rm -f $TMP_FILE" EXIT

    log_info "Downloading setup script from:"
    log_info "  $SETUP_URL"
    echo ""

    # Download the script
    if ! curl -fsSL "$SETUP_URL" -o "$TMP_FILE"; then
        log_error "Failed to download setup script"
        log_info "Please check:"
        log_info "  • Your internet connection"
        log_info "  • The repository URL is correct"
        log_info "  • You have access to the repository"
        exit 1
    fi

    # Verify it's a valid bash script
    if ! head -n 1 "$TMP_FILE" | grep -q "^#!/"; then
        log_error "Downloaded file does not appear to be a valid script"
        exit 1
    fi

    log_success "Setup script downloaded successfully"

    # Run the setup script
    log_header "Running Setup"
    echo ""

    chmod +x "$TMP_FILE"
    bash "$TMP_FILE" "$@"
}

show_welcome() {
    clear
    echo ""
    echo -e "${BLUE}╔══════════════════════════════════════════════════════╗${NC}"
    echo -e "${BLUE}║                                                      ║${NC}"
    echo -e "${BLUE}║     ${GREEN}InternalAI Platform Installer${BLUE}     ║${NC}"
    echo -e "${BLUE}║                                                      ║${NC}"
    echo -e "${BLUE}║            Version ${INSTALLER_VERSION}              ║${NC}"
    echo -e "${BLUE}║                                                      ║${NC}"
    echo -e "${BLUE}╚══════════════════════════════════════════════════════╝${NC}"
    echo ""
    log_info "This installer will:"
    echo "  • Check system dependencies"
    echo "  • Set up Gitea authentication"
    echo "  • Clone the InternalAI platform repository"
    echo "  • Install the 'internalai' command-line tool"
    echo ""
}

# ============================================================================
# Main Installation Flow
# ============================================================================

main() {
    show_welcome
    check_requirements
    download_and_run_setup "$@"
}

main "$@"