package handlers

import (
	"bytes"
	"log"
	"net/http"

	"github.com/k3a/html2text"
)

// ==============================================================================
// PLAIN TEXT HANDLER
// Converts HTML CV to readable plain text for terminal/AI consumption
// ==============================================================================

// PlainText renders the CV as plain text
// Useful for: curl users, AI crawlers, accessibility, copy-paste
func (h *CVHandler) PlainText(w http.ResponseWriter, r *http.Request) {
	// Get language from query parameter, default to English
	lang := r.URL.Query().Get("lang")
	if lang == "" {
		lang = "en"
	}

	// Validate language
	if lang != "en" && lang != "es" {
		http.Error(w, "Unsupported language. Use 'en' or 'es'", http.StatusBadRequest)
		return
	}

	// Prepare template data using shared helper
	data, err := h.prepareTemplateData(lang)
	if err != nil {
		log.Printf("PlainText: Failed to load CV data: %v", err)
		http.Error(w, "Failed to load CV data", http.StatusInternalServerError)
		return
	}

	// Add preferences for full CV display (show everything)
	data["CVLengthClass"] = "cv-long"
	data["ShowIcons"] = false // Icons don't render in text
	data["ThemeClean"] = false

	// Render HTML template to buffer
	tmpl, err := h.templates.Render("index.html")
	if err != nil {
		log.Printf("PlainText: Failed to load template: %v", err)
		http.Error(w, "Failed to load template", http.StatusInternalServerError)
		return
	}

	var htmlBuffer bytes.Buffer
	if err := tmpl.Execute(&htmlBuffer, data); err != nil {
		log.Printf("PlainText: Failed to execute template: %v", err)
		http.Error(w, "Failed to render template: "+err.Error(), http.StatusInternalServerError)
		return
	}

	// Convert HTML to plain text
	text := html2text.HTML2Text(htmlBuffer.String())

	// Set response headers
	w.Header().Set("Content-Type", "text/plain; charset=utf-8")
	w.Header().Set("X-Content-Type-Options", "nosniff")

	// Write plain text response
	_, _ = w.Write([]byte(text))
}