package main

import (
	"encoding/json"
	"io/ioutil"
	"log"
	"net/http"
	"os"
	"strconv"

	"github.com/gorilla/mux"
	"go-sjles-pta-vote/server/models"
	"go-sjles-pta-vote/server/services"
)

func voteHandler(w http.ResponseWriter, r *http.Request) {
	var vote models.Vote
	if err := json.NewDecoder(r.Body).Decode(&vote); err != nil {
		http.Error(w, "Invalid request payload", http.StatusBadRequest)
		return
	}

	err := services.SetVote(&vote)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	w.WriteHeader(http.StatusOK)
}

func voteIDHandler(w http.ResponseWriter, r *http.Request) {
	vars := mux.Vars(r)
	idStr := vars["id"]
	id, err := strconv.ParseInt(idStr, 10, 64)
	if err != nil {
		http.Error(w, "Invalid poll ID", http.StatusBadRequest)
		return
	}

	vote := models.Vote{
		PollId: id,
		Email:  "example@example.com", // Replace with actual email retrieval logic
		Vote:   true,                    // Replace with actual vote retrieval logic
	}

	err = services.SetVote(&vote)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	w.WriteHeader(http.StatusOK)
}

func statsHandler(w http.ResponseWriter, r *http.Request) {
	if r.Method == "GET" {
		filePath := "./server/templates/stats.html"
		log.Printf("Serving stats.html from %s", filePath)
		http.ServeFile(w, r, filePath)
	} else if r.Method == "POST" {
		vars := mux.Vars(r)
		id := vars["id"]

		poll, err := services.GetPollByQuestion(id)
		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		json.NewEncoder(w).Encode(poll)
	} else {
		w.WriteHeader(http.StatusMethodNotAllowed)
	}
}

func statsIDHandler(w http.ResponseWriter, r *http.Request) {
	vars := mux.Vars(r)
	id := vars["id"]

	poll, err := services.GetPollByQuestion(id)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	json.NewEncoder(w).Encode(poll)
}

func adminHandler(w http.ResponseWriter, r *http.Request) {
	// Add admin functionality here
	w.WriteHeader(http.StatusOK)
}

func adminIDHandler(w http.ResponseWriter, r *http.Request) {
	//vars := mux.Vars(r)
	//id := vars["id"]

	// Add admin functionality here
	w.WriteHeader(http.StatusOK)
}

func adminMembersHandler(w http.ResponseWriter, r *http.Request) {
	if r.Method == "GET" {
		filePath := "./server/templates/members.html"
		log.Printf("Serving members.html from %s", filePath)
		http.ServeFile(w, r, filePath)
	} else if r.Method == "POST" {
		var year int
		var err error
		r.ParseForm()
		if y := r.FormValue("year"); y != "" {
			year, err = strconv.Atoi(y)
			if err != nil {
				http.Error(w, "Invalid year", http.StatusBadRequest)
				return
			}
		}

		file, _, err := r.FormFile("members.csv")
		if err != nil {
			http.Error(w, "Failed to upload file", http.StatusBadRequest)
			return
		}
		defer file.Close()

		fileBytes, err := ioutil.ReadAll(file)
		if err != nil {
			http.Error(w, "Failed to read file", http.StatusInternalServerError)
			return
		}

		err = services.ParseMembersFromBytes(year, fileBytes)
		if err != nil {
			w.WriteHeader(http.StatusBadRequest)
			json.NewEncoder(w).Encode(map[string]string{"error": err.Error()})
			return
		}
		
		w.WriteHeader(http.StatusOK)
		json.NewEncoder(w).Encode(map[string]bool{"success": true})
	} else {
		w.WriteHeader(http.StatusMethodNotAllowed)
	}
}

func main() {
	log.SetOutput(os.Stdout)
	log.SetFlags(log.LstdFlags | log.Lshortfile)

	log.Printf("Starting server on :8080")

	http.HandleFunc("/vote", voteHandler)
	http.HandleFunc("/vote/{id}", voteIDHandler)
	http.HandleFunc("/stats", statsHandler)
	http.HandleFunc("/stats/{id}", statsIDHandler)
	http.HandleFunc("/admin", adminHandler)
	http.HandleFunc("/admin/{id}", adminIDHandler)
	http.HandleFunc("/admin/members", adminMembersHandler)
	http.HandleFunc("/favicon.ico", func(w http.ResponseWriter, r *http.Request) {
		filePath := "./server/icons/favicon.ico"
		http.ServeFile(w, r, filePath)
	})

	log.Fatal(http.ListenAndServe(":8080", nil))
}