package main

import (
	"fmt"
	"net/http"
)

const log_length = 100

func main() {
	fs := http.FileServer(http.Dir("static"))

	var logs [log_length]string
	n := 0

	// Define a handler function for the root path
	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		addRotLog(&logs, &n, fmt.Sprintf("Accessed %s", r.URL.Path))
		// Serve the index.html file from the static directory
		http.StripPrefix("/", fs).ServeHTTP(w, r)
	})

	http.HandleFunc("/logs", createGetLogs(&logs))

	http.HandleFunc("/foo", func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprintf(w, "foo!")
	})

	// Start the server on port 8080
	fmt.Println("Server is listening on port 8080...")
	err := http.ListenAndServe(":8080", nil)
	if err != nil {
		fmt.Printf("Error starting server: %s\n", err)
	}
}

func createGetLogs(logs *[log_length]string) func(http.ResponseWriter, *http.Request) {
	return func(w http.ResponseWriter, r *http.Request) {
		for _, s := range logs {
			fmt.Fprintln(w, s)
		}
	}
}

func addRotLog(logs *[log_length]string, last *int, value string) {
	if *last == log_length {
		for i := 0 ; i < log_length-1; i++ {
			logs[i] = logs[i+1]
		}
		logs[log_length-1] = value
	} else {
		logs[*last] = value
		*last++
	}
}