import { z } from "zod";

const emptyToUndefined = (value: unknown) => {
  if (typeof value !== "string") return value;
  const trimmed = value.trim();
  return trimmed.length ? trimmed : undefined;
};

const optionalString = z.preprocess(emptyToUndefined, z.string().max(4000).optional());
const optionalUrl = z.preprocess(
  emptyToUndefined,
  z.string().url("Enter a valid URL, including https://").max(500).optional()
);

const baseSubmissionSchema = z.object({
  type: z.enum(["start", "ask"]),
  name: z.string().trim().min(1, "Name is required").max(160),
  email: z.string().trim().email("Enter a valid email").max(255),
  linkedin: optionalUrl,
  consentAccepted: z.literal(true, {
    errorMap: () => ({ message: "You must acknowledge the disclaimer before submitting" })
  }),
  sourcePath: z.string().max(200).optional()
});

export const startSubmissionSchema = baseSubmissionSchema.extend({
  type: z.literal("start"),
  companyWebsite: optionalUrl,
  currentRoleCompany: optionalString,
  fieldOrIndustry: optionalString,
  reason: z.string().trim().min(1, "Tell us what brings you to Paprika").max(4000),
  existingRecognition: optionalString,
  timeline: optionalString
});

export const askSubmissionSchema = baseSubmissionSchema.extend({
  type: z.literal("ask"),
  question: z.string().trim().min(1, "Question is required").max(4000)
});

export const submissionSchema = z.discriminatedUnion("type", [
  startSubmissionSchema,
  askSubmissionSchema
]);

export type SubmissionInput = z.infer<typeof submissionSchema>;