package server

import (
	"fmt"
	"log"
	"os"
	"path/filepath"

	"dk/internal/router"
	"dk/internal/template"

	"github.com/valyala/fasthttp"
)

func Start(port string) error {
	// Initialize template cache - use current working directory for development
	cwd, err := os.Getwd()
	if err != nil {
		return fmt.Errorf("failed to get current working directory: %w", err)
	}
	templateCache := template.NewCache(cwd)
	
	// Initialize router
	r := router.New()
	
	// Hello world endpoint
	r.Get("/", func(ctx router.Ctx, params []string) {
		tmpl, err := templateCache.Load("hello.html")
		if err != nil {
			ctx.SetStatusCode(fasthttp.StatusInternalServerError)
			fmt.Fprintf(ctx, "Template error: %v", err)
			return
		}
		
		data := map[string]any{
			"title": "Dragon Knight",
			"message": "Hello World!",
		}
		
		tmpl.WriteTo(ctx, data)
	})
	
	// Use current working directory for static files
	assetsDir := filepath.Join(cwd, "assets")
	
	// Static file server for /assets
	fs := &fasthttp.FS{
		Root:     assetsDir,
		Compress: true,
	}
	assetsHandler := fs.NewRequestHandler()
	
	// Combined handler
	requestHandler := func(ctx *fasthttp.RequestCtx) {
		path := string(ctx.Path())
		
		// Handle static assets - strip /assets prefix
		if len(path) >= 7 && path[:7] == "/assets" {
			// Strip the /assets prefix for the file system handler
			originalPath := ctx.Path()
			ctx.Request.URI().SetPath(path[7:]) // Remove "/assets" prefix
			assetsHandler(ctx)
			ctx.Request.URI().SetPathBytes(originalPath) // Restore original path
			return
		}
		
		// Handle routes
		r.ServeHTTP(ctx)
	}
	
	addr := ":" + port
	log.Printf("Server starting on %s", addr)
	return fasthttp.ListenAndServe(addr, requestHandler)
}