import { z } from "zod"

// Shared between the server action and the form so both validate identically.
export const contactSchema = z.object({
  name: z
    .string()
    .trim()
    .min(2, "Bitte gib deinen Namen an."),
  email: z
    .string()
    .trim()
    // Zod's default email pattern rejects valid Unicode addresses (e.g. müller@example.de)
    .pipe(
      z.email({
        pattern: z.regexes.unicodeEmail,
        error: "Bitte gib eine gültige E-Mail-Adresse an.",
      })
    ),
  company: z.string().trim().max(120, "Maximal 120 Zeichen.").optional(),
  message: z
    .string()
    .trim()
    .min(20, "Erzähl uns in mindestens 20 Zeichen, worum es geht.")
    .max(4000, "Maximal 4000 Zeichen."),
  privacy: z.literal("on", {
    error: "Bitte stimme der Verarbeitung deiner Angaben zu.",
  }),
})

export type ContactInput = z.infer<typeof contactSchema>
export type ContactField = keyof ContactInput

export type ContactFormState = {
  status: "idle" | "success" | "error"
  message?: string
  fieldErrors?: Partial<Record<ContactField, string[]>>
  // Echoed back so the form keeps its values after a failed submit.
  // `privacy` is separate from ContactField's string values: the checkbox
  // needs a boolean, not the raw "on" the form field submits.
  values?: Partial<Record<Exclude<ContactField, "privacy">, string>> & {
    privacy?: boolean
  }
}

export const initialContactState: ContactFormState = { status: "idle" }