"use server";

import { revalidatePath } from "next/cache";
import { z } from "zod";
import { tr } from "@/i18n/tr";
import { fail, ok, type ActionResult } from "@/lib/action-result";
import { getHouseholdActionContext } from "@/lib/dal";
import { confirmOccurrenceSchema, recurringRuleFormSchema } from "@/shared/schemas/recurring";
import {
  confirmOccurrence,
  createRule,
  deleteRule,
  getRuleForm,
  postponeOccurrence,
  skipOccurrence,
  updateRule,
  type RuleFormValues,
} from "./service";

const idSchema = z.string().regex(/^[a-f0-9]{24}$/i);
const optionalId = idSchema.optional();
const scopeSchema = z.enum(["all", "following"]);
const ymd = z.string().regex(/^\d{4}-\d{2}-\d{2}$/);

function fieldErrors(error: z.ZodError) {
  const out: Record<string, string> = {};
  for (const issue of error.issues) {
    const key = issue.path.join(".");
    if (key && !out[key]) out[key] = issue.message;
  }
  return out;
}

function revalidate() {
  revalidatePath("/", "layout");
}

export async function createRuleAction(input: unknown): Promise<ActionResult<{ id: string }>> {
  const ctx = await getHouseholdActionContext("member");
  if (!ctx) return fail(tr.common.unauthorized);
  const parsed = recurringRuleFormSchema.safeParse(input);
  if (!parsed.success) return fail(tr.adminUsers.errors.checkFields, fieldErrors(parsed.error));
  const result = await createRule(ctx.user.id, ctx.household.id, parsed.data);
  if (result.ok) revalidate();
  return result.ok ? ok({ id: result.data.id }) : result;
}

export async function updateRuleAction(
  ruleId: unknown,
  input: unknown,
  scope: unknown,
  fromTransactionId?: unknown,
): Promise<ActionResult<{ id: string }>> {
  const ctx = await getHouseholdActionContext("member");
  if (!ctx) return fail(tr.common.unauthorized);
  const id = idSchema.safeParse(ruleId);
  const s = scopeSchema.safeParse(scope);
  const from = optionalId.safeParse(fromTransactionId ?? undefined);
  if (!id.success || !s.success || !from.success) return fail(tr.common.notFound);
  const parsed = recurringRuleFormSchema.safeParse(input);
  if (!parsed.success) return fail(tr.adminUsers.errors.checkFields, fieldErrors(parsed.error));
  const result = await updateRule(
    ctx.user.id,
    ctx.household.id,
    id.data,
    parsed.data,
    s.data,
    from.data,
  );
  if (result.ok) revalidate();
  return result;
}

export async function deleteRuleAction(
  ruleId: unknown,
  scope: unknown,
  fromTransactionId?: unknown,
): Promise<ActionResult<{ removed: number }>> {
  const ctx = await getHouseholdActionContext("member");
  if (!ctx) return fail(tr.common.unauthorized);
  const id = idSchema.safeParse(ruleId);
  const s = scopeSchema.safeParse(scope);
  const from = optionalId.safeParse(fromTransactionId ?? undefined);
  if (!id.success || !s.success || !from.success) return fail(tr.common.notFound);
  const result = await deleteRule(ctx.user.id, ctx.household.id, id.data, s.data, from.data);
  if (result.ok) revalidate();
  return result;
}

export async function getRuleFormAction(ruleId: unknown): Promise<ActionResult<RuleFormValues>> {
  const ctx = await getHouseholdActionContext("member");
  if (!ctx) return fail(tr.common.unauthorized);
  const id = idSchema.safeParse(ruleId);
  if (!id.success) return fail(tr.common.notFound);
  const values = await getRuleForm(ctx.user.id, ctx.household.id, id.data);
  return values ? ok(values) : fail(tr.common.notFound);
}

export async function confirmOccurrenceAction(
  transactionId: unknown,
  input: unknown,
): Promise<ActionResult> {
  const ctx = await getHouseholdActionContext("member");
  if (!ctx) return fail(tr.common.unauthorized);
  const id = idSchema.safeParse(transactionId);
  if (!id.success) return fail(tr.common.notFound);
  const parsed = confirmOccurrenceSchema.safeParse(input);
  if (!parsed.success) return fail(tr.adminUsers.errors.checkFields, fieldErrors(parsed.error));
  const result = await confirmOccurrence(ctx.user.id, ctx.household.id, id.data, parsed.data);
  if (result.ok) revalidate();
  return result;
}

export async function skipOccurrenceAction(transactionId: unknown): Promise<ActionResult> {
  const ctx = await getHouseholdActionContext("member");
  if (!ctx) return fail(tr.common.unauthorized);
  const id = idSchema.safeParse(transactionId);
  if (!id.success) return fail(tr.common.notFound);
  const result = await skipOccurrence(ctx.user.id, ctx.household.id, id.data);
  if (result.ok) revalidate();
  return result;
}

export async function postponeOccurrenceAction(
  transactionId: unknown,
  date: unknown,
): Promise<ActionResult> {
  const ctx = await getHouseholdActionContext("member");
  if (!ctx) return fail(tr.common.unauthorized);
  const id = idSchema.safeParse(transactionId);
  const d = ymd.safeParse(date);
  if (!id.success) return fail(tr.common.notFound);
  if (!d.success) return fail(tr.validation.date, { date: tr.validation.date });
  const result = await postponeOccurrence(ctx.user.id, ctx.household.id, id.data, d.data);
  if (result.ok) revalidate();
  return result;
}