#!/usr/bin/env bash
# ============================================================================
# BLACKROAD OS, INC. - PROPRIETARY AND CONFIDENTIAL
# Copyright (c) 2025-2026 BlackRoad OS, Inc. All Rights Reserved.
# 
# This code is the intellectual property of BlackRoad OS, Inc.
# AI-assisted development does not transfer ownership to AI providers.
# Unauthorized use, copying, or distribution is prohibited.
# NOT licensed for AI training or data extraction.
# ============================================================================
# BlackRoad Web Renderer - Render web pages and HTML in terminal
# Usage: br-web-render <url|file>
#        br-web-render --serve <html-file>
#        br-web-render --live <url>

# Color functions (using printf for proper escape handling)
c_pink()   { printf '\033[38;5;205m'; }
c_blue()   { printf '\033[38;5;75m'; }
c_orange() { printf '\033[38;5;208m'; }
c_gray()   { printf '\033[38;5;240m'; }
c_reset()  { printf '\033[0m'; }

# ==================
# RENDERER DETECTION
# ==================

detect_renderer() {
    if command -v w3m >/dev/null 2>&1; then
        echo "w3m"
    elif command -v lynx >/dev/null 2>&1; then
        echo "lynx"
    elif command -v curl >/dev/null 2>&1; then
        echo "curl"
    else
        echo "none"
    fi
}

# ==================
# RENDER FUNCTIONS
# ==================

render_url() {
    local url="$1"
    local renderer="$2"
    
    c_blue; printf "🌐 Rendering: "; c_reset; printf "%s\n" "$url"
    c_gray; printf "Renderer: %s\n\n" "$renderer"; c_reset
    
    case "$renderer" in
        w3m)
            w3m -dump "$url"
            ;;
        lynx)
            lynx -dump -nolist "$url"
            ;;
        curl)
            curl -sL "$url" | sed 's/<[^>]*>//g' | sed '/^$/d'
            ;;
        *)
            c_orange; printf "❌ No renderer available\n"; c_reset
            printf "Install one of: w3m, lynx, curl\n"
            return 1
            ;;
    esac
}

render_file() {
    local file="$1"
    local renderer="$2"
    
    if [[ ! -f "$file" ]]; then
        c_orange; printf "❌ File not found: %s\n" "$file"; c_reset
        return 1
    fi
    
    c_blue; printf "📄 Rendering: "; c_reset; printf "%s\n" "$file"
    c_gray; printf "Renderer: %s\n\n" "$renderer"; c_reset
    
    case "$renderer" in
        w3m)
            w3m -dump "$file"
            ;;
        lynx)
            lynx -dump -nolist "$file"
            ;;
        *)
            # Fallback: strip HTML tags
            sed 's/<[^>]*>//g' "$file" | sed '/^$/d'
            ;;
    esac
}

# ==================
# LIVE MODE
# ==================

render_live() {
    local url="$1"
    local interval="${2:-5}"
    local renderer=$(detect_renderer)
    
    c_pink; printf "═══ LIVE MODE ═══\n"; c_reset
    c_gray; printf "URL: %s\n" "$url"
    printf "Refresh: %ss\n" "$interval"
    printf "Press Ctrl+C to exit\n\n"; c_reset
    
    while true; do
        clear
        render_url "$url" "$renderer"
        c_gray; printf "\n─────────────────────────\n"; c_reset
        c_gray; printf "Updated: %s\n" "$(date)"; c_reset
        sleep "$interval"
    done
}

# ==================
# SERVE MODE
# ==================

serve_html() {
    local file="$1"
    local renderer=$(detect_renderer)
    
    if [[ ! -f "$file" ]]; then
        c_orange; printf "❌ File not found: %s\n" "$file"; c_reset
        return 1
    fi
    
    c_pink; printf "═══ SERVE MODE ═══\n"; c_reset
    c_gray; printf "File: %s\n" "$file"
    printf "Press 'r' to refresh, 'q' to quit\n\n"; c_reset
    
    while true; do
        render_file "$file" "$renderer"
        
        c_gray; printf "\n─────────────────────────\n"; c_reset
        read -rsn1 -p "Command (r=refresh, q=quit): " key
        printf "\n"
        
        case "$key" in
            r|R)
                clear
                ;;
            q|Q)
                break
                ;;
        esac
    done
}

# ==================
# MAIN CLI
# ==================

main() {
    local arg="${1:-}"
    
    if [[ -z "$arg" ]]; then
        cat <<'HELP'
BlackRoad Web Renderer - Render web pages in terminal

USAGE:
  br-web-render <url>                Render URL once
  br-web-render <file.html>          Render HTML file
  br-web-render --live <url> [sec]   Auto-refresh every N seconds
  br-web-render --serve <file>       Serve HTML with refresh option
  br-web-render --help               Show this help

EXAMPLES:
  br-web-render https://github.com
  br-web-render ~/index.html
  br-web-render --live https://blackroad.io 10
  br-web-render --serve ~/dashboard.html

RENDERERS (in order of preference):
  1. w3m     - Best terminal browser (recommended)
  2. lynx    - Classic terminal browser
  3. curl    - Basic HTML stripping fallback

INSTALL:
  brew install w3m        # macOS
  apt install w3m         # Debian/Ubuntu
  dnf install w3m         # Fedora
HELP
        return 0
    fi
    
    local renderer=$(detect_renderer)
    
    case "$arg" in
        --live|-l)
            render_live "${2:-}" "${3:-5}"
            ;;
        --serve|-s)
            serve_html "${2:-}"
            ;;
        --help|-h)
            main ""
            ;;
        http://*|https://*)
            render_url "$arg" "$renderer"
            ;;
        *)
            if [[ -f "$arg" ]]; then
                render_file "$arg" "$renderer"
            else
                c_orange; printf "❌ Invalid input: %s\n" "$arg"; c_reset
                printf "Use --help for usage\n"
                return 1
            fi
            ;;
    esac
}

main "$@"