"use server";

import { eq } from "drizzle-orm";
import { revalidatePath } from "next/cache";
import { db } from "@/lib/db";
import { users } from "@/modules/_core/schema";
import {
  VALID_PALETTES,
  VALID_THEME_MODES,
  VALID_FONT_PAIRS,
  VALID_DENSITIES,
  VALID_DASH_LAYOUTS,
  VALID_CAL_VIEWS,
  VALID_NAV_STYLES,
} from "@/modules/_core/themes";
import type {
  Palette,
  ThemeMode,
  FontPair,
  Density,
  DashLayout,
  CalView,
  NavStyle,
} from "@/modules/_core/themes";
import { getCurrentSession } from "@/lib/session";
import { revokeShareLink } from "@/modules/_core/share";

export interface ThemePatch {
  palette?: Palette;
  mode?: ThemeMode;
  fontPair?: FontPair;
  density?: Density;
  dashLayout?: DashLayout;
  calView?: CalView;
  navStyle?: NavStyle;
}

export async function setUserTheme(patch: ThemePatch) {
  const update: Record<string, string> = {};

  if (patch.palette !== undefined) {
    if (!VALID_PALETTES.has(patch.palette)) throw new Error("Invalid palette");
    update["themePalette"] = patch.palette;
  }
  if (patch.mode !== undefined) {
    if (!VALID_THEME_MODES.has(patch.mode)) throw new Error("Invalid theme mode");
    update["themeMode"] = patch.mode;
  }
  if (patch.fontPair !== undefined) {
    if (!VALID_FONT_PAIRS.has(patch.fontPair)) throw new Error("Invalid font pair");
    update["themeFontPair"] = patch.fontPair;
  }
  if (patch.density !== undefined) {
    if (!VALID_DENSITIES.has(patch.density)) throw new Error("Invalid density");
    update["themeDensity"] = patch.density;
  }
  if (patch.dashLayout !== undefined) {
    if (!VALID_DASH_LAYOUTS.has(patch.dashLayout)) throw new Error("Invalid dashboard layout");
    update["themeDashLayout"] = patch.dashLayout;
  }
  if (patch.calView !== undefined) {
    if (!VALID_CAL_VIEWS.has(patch.calView)) throw new Error("Invalid calendar view");
    update["themeCalView"] = patch.calView;
  }
  if (patch.navStyle !== undefined) {
    if (!VALID_NAV_STYLES.has(patch.navStyle)) throw new Error("Invalid nav style");
    update["themeNavStyle"] = patch.navStyle;
  }

  if (Object.keys(update).length === 0) return;

  const { user } = await getCurrentSession();
  await db.update(users).set(update).where(eq(users.id, user.id));
}

export async function setCompletionVisibilityHours(hours: number): Promise<void> {
  const parsed = Number(hours);
  if (!Number.isInteger(parsed) || parsed < 0 || parsed > 8760)
    throw new Error("Invalid hours value");
  const { user } = await getCurrentSession();
  await db.update(users).set({ completionVisibilityHours: parsed }).where(eq(users.id, user.id));
  revalidatePath("/settings");
}

export async function revokeShareLinkAction(formData: FormData): Promise<void> {
  const id = formData.get("id");
  if (typeof id !== "string") throw new Error("Missing id");
  await revokeShareLink(id);
  revalidatePath("/settings");
}