'use client';

import { z } from "zod"
import { useForm } from "react-hook-form"
import { zodResolver } from "@hookform/resolvers/zod"

// Shadcn UI components
import { 
  Form, 
  FormControl, 
  FormField, 
  FormItem, 
  FormLabel, 
  FormMessage 
} from "@/components/ui/form"
import { Input } from "@/components/ui/input"
import { Button } from "@/components/ui/button"
import { 
  Select, 
  SelectContent, 
  SelectItem, 
  SelectTrigger, 
  SelectValue 
} from "@/components/ui/select"
import { Switch } from "@/components/ui/switch"

// 1. Schema definition
const formSchema = z.object({
  email: z.string().email("Invalid email address."),
  role: z.string().min(1, "Please select a role."), // Rollenbezeichnung
  status: z.boolean().default(true), // Status (Active/Inactive)
  password: z.string().min(8, "Password must be at least 8 characters."),
})

export type FormValues = z.infer<typeof formSchema>

export default function UserForm() {
  // 2. Initialize the form
  const form = useForm({
    resolver: zodResolver(formSchema),
    defaultValues: {
      email: "",
      role: "user",
      status: true,
      password: "",
    },
  })

  // 3. Define the submit handler
  function onSubmit(values: FormValues) {
    // All comments in code must be in English
    // Later we will connect this to a Server Action
    console.log("Form values:", values)
  }

  return (
    <Form {...form}>
      <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-6 py-4">
        {/* Email Field */}
        <FormField
          control={form.control}
          name="email"
          render={({ field }) => (
            <FormItem>
              <FormLabel>Email</FormLabel>
              <FormControl>
                <Input placeholder="example@mail.com" {...field} />
              </FormControl>
              <FormMessage />
            </FormItem>
          )}
        />

        {/* Role Select Field */}
        <FormField
          control={form.control}
          name="role"
          render={({ field }) => (
            <FormItem>
              <FormLabel>Role (Rollenbezeichnung)</FormLabel>
              <Select onValueChange={field.onChange} defaultValue={field.value}>
                <FormControl>
                  <SelectTrigger>
                    <SelectValue placeholder="Select a role" />
                  </SelectTrigger>
                </FormControl>
                <SelectContent>
                  <SelectItem value="admin">Admin</SelectItem>
                  <SelectItem value="editor">Editor</SelectItem>
                  <SelectItem value="user">User</SelectItem>
                </SelectContent>
              </Select>
              <FormMessage />
            </FormItem>
          )}
        />

        {/* Status Switch Field */}
        <FormField
          control={form.control}
          name="status"
          render={({ field }) => (
            <FormItem className="flex flex-row items-center justify-between rounded-lg border p-3 shadow-sm">
              <div className="space-y-0.5">
                <FormLabel>Active Status</FormLabel>
              </div>
              <FormControl>
                <Switch
                  checked={field.value}
                  onCheckedChange={field.onChange}
                />
              </FormControl>
            </FormItem>
          )}
        />

        {/* Password Field */}
        <FormField
          control={form.control}
          name="password"
          render={({ field }) => (
            <FormItem>
              <FormLabel>Password</FormLabel>
              <FormControl>
                <Input type="password" placeholder="••••••••" {...field} />
              </FormControl>
              <FormMessage />
            </FormItem>
          )}
        />

        <Button type="submit" className="w-full">Save User</Button>
      </form>
    </Form>
  )
}