package controllers

import (
    "log"
	"fmt"
    "os"
    "time"
	"net/http"
	"encoding/json"

	"github.com/gorilla/mux"
    "github.com/joho/godotenv"
    "gorm.io/driver/postgres"
    "gorm.io/gorm"

)

// User represents a user in the system
type User struct {
    UserID    uint      `gorm:"primaryKey"`
    Username  string    `gorm:"size:50;not null"`
    Email     string    `gorm:"size:100;not null"`
    Password  string    `gorm:"size:100;not null"`
    CreatedAt time.Time `gorm:"autoCreateTime"`
}

// GetUsers handles the GET /users route
func GetUsers(w http.ResponseWriter, r *http.Request) {
	users := []User{
		{UserID: 1, Username: "John Doe"},
		{UserID: 2, Username: "Jane Doe"},
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(users)
}

// GetUser handles the GET /users/{id} route
func GetUser(w http.ResponseWriter, r *http.Request) {
	vars := mux.Vars(r)
	id := vars["id"]

	user := User{UserID: 1, Username: "John Doe"} // Placeholder user

	if id == "1" {
		w.Header().Set("Content-Type", "application/json")
		json.NewEncoder(w).Encode(user)
	} else {
		http.Error(w, "User not found", http.StatusNotFound)
	}
}

// CreateUser handles the POST /users route
func CreateUser(w http.ResponseWriter, r *http.Request) {
	user := User{Username: "john_doe", Email: "john@example.com", Password: "securepassword"}
	
	err := json.NewDecoder(r.Body).Decode(&user)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	
	db, err:=connector()
    // Auto-migrate the schema
    db.AutoMigrate(&User{})

    // Example of inserting a user
   
    db.Create(&user)

    // At this point, user.UserID will be set to the ID generated by the database
    log.Println("New user ID:", user.UserID)

	

	fmt.Fprintf(w, "Received user: %+v", user)
}


func connector() (*gorm.DB, error) {
    // Database connection string
	err:= godotenv.Load();
    if(err!=nil) {
        log.Fatal("Error loading .env file")
    }
    dsn := fmt.Sprint(os.Getenv("DATABASE_DSN"))
    log.Print(dsn)
    // Open the database connection
    db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{})
    if err != nil {
        log.Fatal("failed to connect database:", err)
    }
	return db, err
}