import { and, eq, inArray } from "drizzle-orm";

import { db } from "./db";
import { appConfig, mediaUsage } from "./db/schema";
export const MAINTENANCE_MODE_KEY = "maintenance_mode";
export {
  SITE_NAME_KEY,
  SITE_SETTINGS_DEFAULT_OG_IMAGE_FIELD_KEY,
  SITE_SETTINGS_ENTITY_ID,
  SITE_SETTINGS_ENTITY_TYPE,
  SITE_SETTINGS_FAVICON_FIELD_KEY,
  SITE_SETTINGS_LOGO_DARK_FIELD_KEY,
  SITE_SETTINGS_LOGO_LIGHT_FIELD_KEY,
  SITE_SETTINGS_KEY,
  DEFAULT_SITE_NAME,
  buildDefaultSiteSettings,
  getDefaultSiteSettingsMediaBindings,
  parseSiteSettingsValue,
  type SiteSettings,
  type SiteSettingsMediaBindings,
} from "./site-settings";
export {
  MAIL_SETTINGS_KEY,
  buildDefaultMailSettings,
  parseMailSettingsValue,
  toMailSettingsFormValues,
  type MailSettings,
  type MailSettingsFormValues,
} from "./mail-settings";
export {
  MARQUEE_SETTINGS_KEY,
  buildDefaultMarqueeSettings,
  parseMarqueeSettingsValue,
  splitMarqueeRowItems,
  syncMarqueeSettingsToGermanSource,
  type MarqueeLocaleSettings,
  type MarqueeSettings,
} from "./marquee-settings";
import {
  DEFAULT_SITE_NAME,
  SITE_NAME_KEY,
  SITE_SETTINGS_DEFAULT_OG_IMAGE_FIELD_KEY,
  SITE_SETTINGS_ENTITY_ID,
  SITE_SETTINGS_ENTITY_TYPE,
  SITE_SETTINGS_FAVICON_FIELD_KEY,
  SITE_SETTINGS_LOGO_DARK_FIELD_KEY,
  SITE_SETTINGS_LOGO_LIGHT_FIELD_KEY,
  SITE_SETTINGS_KEY,
  buildDefaultSiteSettings,
  getDefaultSiteSettingsMediaBindings,
  parseSiteSettingsValue,
  type SiteSettings,
  type SiteSettingsMediaBindings,
} from "./site-settings";
import {
  MAIL_SETTINGS_KEY,
  buildDefaultMailSettings,
  parseMailSettingsValue,
  toMailSettingsFormValues,
  type MailSettings,
  type MailSettingsFormValues,
} from "./mail-settings";
import {
  MARQUEE_SETTINGS_KEY,
  buildDefaultMarqueeSettings,
  parseMarqueeSettingsValue,
  syncMarqueeSettingsToGermanSource,
  type MarqueeSettings,
} from "./marquee-settings";

async function getAppConfigValue(key: string): Promise<string | undefined> {
  const rows = await db
    .select({ value: appConfig.value })
    .from(appConfig)
    .where(eq(appConfig.key, key))
    .limit(1);

  return rows[0]?.value;
}

async function upsertAppConfigValue(key: string, value: string): Promise<void> {
  await db
    .insert(appConfig)
    .values({ key, value })
    .onConflictDoUpdate({
      target: appConfig.key,
      set: { value, updatedAt: new Date() },
    });
}

export async function getMaintenanceMode(): Promise<boolean> {
  try {
    return (await getAppConfigValue(MAINTENANCE_MODE_KEY)) === "true";
  } catch {
    return false;
  }
}

export async function setMaintenanceMode(enabled: boolean): Promise<void> {
  await upsertAppConfigValue(MAINTENANCE_MODE_KEY, enabled ? "true" : "false");
}

export async function getSiteSettings(): Promise<SiteSettings> {
  try {
    const configs = await db
      .select({ key: appConfig.key, value: appConfig.value })
      .from(appConfig)
      .where(inArray(appConfig.key, [SITE_SETTINGS_KEY, SITE_NAME_KEY]));

    const configMap = new Map(configs.map((config) => [config.key, config.value]));
    const fallbackName = configMap.get(SITE_NAME_KEY) ?? DEFAULT_SITE_NAME;

    return parseSiteSettingsValue(configMap.get(SITE_SETTINGS_KEY), fallbackName);
  } catch {
    return buildDefaultSiteSettings();
  }
}

export async function updateSiteSettings(settings: SiteSettings): Promise<void> {
  await upsertAppConfigValue(SITE_SETTINGS_KEY, JSON.stringify(settings));
}

export async function getMailSettings(): Promise<MailSettings> {
  try {
    return parseMailSettingsValue(await getAppConfigValue(MAIL_SETTINGS_KEY));
  } catch {
    return buildDefaultMailSettings();
  }
}

export async function getMailSettingsFormValues(): Promise<MailSettingsFormValues> {
  const settings = await getMailSettings();

  return toMailSettingsFormValues(settings);
}

export async function updateMailSettings(settings: MailSettings): Promise<void> {
  await upsertAppConfigValue(MAIL_SETTINGS_KEY, JSON.stringify(settings));
}

export async function getMarqueeSettings(): Promise<MarqueeSettings> {
  try {
    return parseMarqueeSettingsValue(await getAppConfigValue(MARQUEE_SETTINGS_KEY));
  } catch {
    return buildDefaultMarqueeSettings();
  }
}

export async function updateMarqueeSettings(settings: MarqueeSettings): Promise<void> {
  const normalizedSettings = syncMarqueeSettingsToGermanSource(settings);

  await upsertAppConfigValue(MARQUEE_SETTINGS_KEY, JSON.stringify(normalizedSettings));
}

export async function getSiteSettingsMediaBindings(): Promise<SiteSettingsMediaBindings> {
  try {
    const usages = await db.query.mediaUsage.findMany({
      where: and(
        eq(mediaUsage.entityType, SITE_SETTINGS_ENTITY_TYPE),
        eq(mediaUsage.entityId, SITE_SETTINGS_ENTITY_ID),
      ),
      columns: {
        fieldKey: true,
        updatedAt: true,
      },
      with: {
        asset: {
          columns: {
            id: true,
            url: true,
          },
        },
      },
    });

    return usages.reduce<SiteSettingsMediaBindings>(
      (result, usage) => {
        if (usage.fieldKey === SITE_SETTINGS_LOGO_LIGHT_FIELD_KEY) {
          result.siteLogoLight = {
            assetId: usage.asset.id,
            url: usage.asset.url,
            version: usage.updatedAt.toISOString(),
          };
        }

        if (usage.fieldKey === SITE_SETTINGS_LOGO_DARK_FIELD_KEY) {
          result.siteLogoDark = {
            assetId: usage.asset.id,
            url: usage.asset.url,
            version: usage.updatedAt.toISOString(),
          };
        }

        if (usage.fieldKey === SITE_SETTINGS_FAVICON_FIELD_KEY) {
          result.favicon = {
            assetId: usage.asset.id,
            url: usage.asset.url,
            version: usage.updatedAt.toISOString(),
          };
        }

        if (usage.fieldKey === SITE_SETTINGS_DEFAULT_OG_IMAGE_FIELD_KEY) {
          result.defaultOgImage = {
            assetId: usage.asset.id,
            url: usage.asset.url,
            version: usage.updatedAt.toISOString(),
          };
        }

        return result;
      },
      getDefaultSiteSettingsMediaBindings(),
    );
  } catch {
    return getDefaultSiteSettingsMediaBindings();
  }
}