package handlers

import (
	"encoding/json"
	"io"
	"log"
	"net/http"
	"strconv"
	"time"

	"gitlab.hamburg.ccc.de/ccchh/spaceapid/types"
)

func Root(resp *types.SpaceAPIResponseV14) func(http.ResponseWriter, *http.Request) {
	return func(w http.ResponseWriter, r *http.Request) {
		// Check if GET method
		if r.Method != http.MethodGet {
			log.Println("Wrong METHOD from", r.RemoteAddr)
			w.Header().Set("Allow", http.MethodGet)
			w.WriteHeader(http.StatusMethodNotAllowed)
			return
		}

		// Serialize response
		response, err := json.Marshal(resp)
		if err != nil {
			log.Println("Failed to serialize JSON response:", err)
			w.WriteHeader(http.StatusInternalServerError)
			return
		}

		// Respond with OK
		w.Header().Set("Access-Control-Allow-Origin", "*")
		w.Header().Set("Content-Type", "application/json")
		w.WriteHeader(http.StatusOK)
		_, _ = w.Write(response)
	}
}

func StateOpen(
	validUsername, validPassword string, resp *types.SpaceAPIResponseV14,
) func(http.ResponseWriter, *http.Request) {
	return func(w http.ResponseWriter, r *http.Request) {
		// Check BasicAuth credentials
		username, password, ok := r.BasicAuth()
		if !ok || username != validUsername || password != validPassword {
			log.Println("Unauthorized request from", r.RemoteAddr)
			w.Header().Set("WWW-Authenticate", "Basic realm=\"space-api\"")
			w.WriteHeader(http.StatusUnauthorized)
			return
		}

		// Check if PUT method
		if r.Method != http.MethodPut {
			log.Println("Wrong METHOD from", r.RemoteAddr)
			w.Header().Set("Allow", http.MethodPut)
			w.WriteHeader(http.StatusMethodNotAllowed)
			return
		}

		// Read request body
		body, err := io.ReadAll(r.Body)
		if err != nil {
			log.Println("Failed to read request body from", r.RemoteAddr)
			w.WriteHeader(http.StatusInternalServerError)
			_, _ = io.WriteString(w, "Failed reading HTTP request body")
			return
		}

		// Parse request body
		newState, err := strconv.ParseBool(string(body))
		if err != nil {
			log.Println("Failed to parse request body from", r.RemoteAddr)
			w.WriteHeader(http.StatusBadRequest)
			_, _ = io.WriteString(w, "HTTP request body should either be true or false")
			return
		}

		// Set SpaceAPI response values
		resp.State.Open = newState
		resp.State.LastChange = time.Now().Unix()

		// Respond with OK
		w.WriteHeader(http.StatusOK)
		_, _ = io.WriteString(w, "Update Successful")
	}
}