package routes

import (
	"net/http"

	"github.com/juanatsap/cv-site/internal/chat"
	c "github.com/juanatsap/cv-site/internal/constants"
	"github.com/juanatsap/cv-site/internal/handlers"
	"github.com/juanatsap/cv-site/internal/middleware"
)

// Setup configures all application routes and middleware
func Setup(cvHandler *handlers.CVHandler, healthHandler *handlers.HealthHandler, chatHandler *chat.Handler) http.Handler {
	mux := http.NewServeMux()

	// Shortcut routes for default CV (year-aware) - MUST be before "/" route
	// Pattern: /cv-jamr-{year}-{lang}.pdf (e.g., /cv-jamr-2025-en.pdf)
	mux.HandleFunc("/cv-jamr-", cvHandler.DefaultCVShortcut)

	// API routes (must be before "/" to avoid catch-all)
	mux.HandleFunc("/api/cmd-k", cvHandler.CmdKData)   // CMD+K command palette data
	mux.HandleFunc("/api/chat", chatHandler.HandleChat) // AI chat endpoint

	// Public routes
	mux.HandleFunc("/", cvHandler.Home)
	mux.HandleFunc("/cv", cvHandler.CVContent)
	mux.HandleFunc("/text", cvHandler.PlainText)       // Plain text version for curl/AI
	mux.HandleFunc("/health", healthHandler.Check)

	// HTMX endpoints for interactive controls
	mux.HandleFunc("/switch-language", cvHandler.SwitchLanguage)
	mux.HandleFunc("/toggle/length", cvHandler.ToggleLength)
	mux.HandleFunc("/toggle/icons", cvHandler.ToggleIcons)
	mux.HandleFunc("/toggle/theme", cvHandler.ToggleTheme)

	// Contact form endpoint with full security chain:
	// BrowserOnly → RateLimiter → Handler
	// This blocks curl/Postman, enforces rate limits, then processes the request
	contactRateLimiter := middleware.NewRateLimiter(c.RateLimitContactRequests, c.RateLimitContactWindow)
	protectedContactHandler := middleware.BrowserOnly(
		contactRateLimiter.Middleware(
			http.HandlerFunc(cvHandler.HandleContact),
		),
	)
	mux.Handle("/api/contact", protectedContactHandler)

	// Protected PDF endpoint with rate limiting (3 requests/minute per IP)
	pdfRateLimiter := middleware.NewRateLimiter(c.RateLimitPDFRequests, c.RateLimitPDFWindow)
	protectedPDFHandler := middleware.OriginChecker(
		pdfRateLimiter.Middleware(
			http.HandlerFunc(cvHandler.ExportPDF),
		),
	)
	mux.Handle("/export/pdf", protectedPDFHandler)

	// Static files with cache control
	staticHandler := http.StripPrefix("/static/", http.FileServer(http.Dir(c.DirStatic)))
	mux.Handle("/static/", middleware.CacheControl(staticHandler))

	// Apply comprehensive middleware chain
	// Order: Recovery → Logger → SecurityHeaders → DynamicCacheControl → Preferences → Mux
	handler := middleware.Recovery(
		middleware.Logger(
			middleware.SecurityHeaders(
				middleware.DynamicCacheControl(
					middleware.PreferencesMiddleware(mux),
				),
			),
		),
	)

	return handler
}