// Copyright 2025 Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only
import {
  type ChatFolderId,
  type ChatFolder,
  CHAT_FOLDER_DELETED_POSITION,
} from '../../types/ChatFolder.js';
import type { ReadableDB, WritableDB } from '../Interface.js';
import { sql } from '../util.js';

export type ChatFolderRow = Readonly<
  Omit<
    ChatFolder,
    | 'showOnlyUnread'
    | 'showMutedChats'
    | 'includeAllIndividualChats'
    | 'includeAllGroupChats'
    | 'includedConversationIds'
    | 'excludedConversationIds'
    | 'storageNeedsSync'
  > & {
    showOnlyUnread: 0 | 1;
    showMutedChats: 0 | 1;
    includeAllIndividualChats: 0 | 1;
    includeAllGroupChats: 0 | 1;
    includedConversationIds: string;
    excludedConversationIds: string;
    storageNeedsSync: 0 | 1;
  }
>;

function chatFolderToRow(chatFolder: ChatFolder): ChatFolderRow {
  return {
    ...chatFolder,
    showOnlyUnread: chatFolder.showOnlyUnread ? 1 : 0,
    showMutedChats: chatFolder.showMutedChats ? 1 : 0,
    includeAllIndividualChats: chatFolder.includeAllIndividualChats ? 1 : 0,
    includeAllGroupChats: chatFolder.includeAllGroupChats ? 1 : 0,
    includedConversationIds: JSON.stringify(chatFolder.includedConversationIds),
    excludedConversationIds: JSON.stringify(chatFolder.excludedConversationIds),
    storageNeedsSync: chatFolder.storageNeedsSync ? 1 : 0,
  };
}

function rowToChatFolder(chatFolderRow: ChatFolderRow): ChatFolder {
  return {
    ...chatFolderRow,
    showOnlyUnread: chatFolderRow.showOnlyUnread === 1,
    showMutedChats: chatFolderRow.showMutedChats === 1,
    includeAllIndividualChats: chatFolderRow.includeAllIndividualChats === 1,
    includeAllGroupChats: chatFolderRow.includeAllGroupChats === 1,
    includedConversationIds: JSON.parse(chatFolderRow.includedConversationIds),
    excludedConversationIds: JSON.parse(chatFolderRow.excludedConversationIds),
    storageNeedsSync: chatFolderRow.storageNeedsSync === 1,
  };
}

export function getAllChatFolders(db: ReadableDB): ReadonlyArray<ChatFolder> {
  const [query, params] = sql`
    SELECT * FROM chatFolders
  `;
  return db
    .prepare(query)
    .all<ChatFolderRow>(params)
    .map(row => rowToChatFolder(row));
}

export function getCurrentChatFolders(
  db: ReadableDB
): ReadonlyArray<ChatFolder> {
  const [query, params] = sql`
    SELECT *
    FROM chatFolders
    WHERE deletedAtTimestampMs IS 0
    ORDER BY position ASC
  `;
  return db
    .prepare(query)
    .all<ChatFolderRow>(params)
    .map(row => rowToChatFolder(row));
}

export function getChatFolder(
  db: ReadableDB,
  id: ChatFolderId
): ChatFolder | null {
  return db.transaction(() => {
    const [query, params] = sql`
      SELECT * FROM chatFolders
      WHERE id = ${id};
    `;
    const row = db.prepare(query).get<ChatFolderRow>(params);
    if (row == null) {
      return null;
    }
    return rowToChatFolder(row);
  })();
}

export function createChatFolder(db: WritableDB, chatFolder: ChatFolder): void {
  return db.transaction(() => {
    const chatFolderRow = chatFolderToRow(chatFolder);
    const [chatFolderQuery, chatFolderParams] = sql`
      INSERT INTO chatFolders (
        id,
        folderType,
        name,
        position,
        showOnlyUnread,
        showMutedChats,
        includeAllIndividualChats,
        includeAllGroupChats,
        includedConversationIds,
        excludedConversationIds,
        deletedAtTimestampMs,
        storageID,
        storageVersion,
        storageUnknownFields,
        storageNeedsSync
      ) VALUES (
        ${chatFolderRow.id},
        ${chatFolderRow.folderType},
        ${chatFolderRow.name},
        ${chatFolderRow.position},
        ${chatFolderRow.showOnlyUnread},
        ${chatFolderRow.showMutedChats},
        ${chatFolderRow.includeAllIndividualChats},
        ${chatFolderRow.includeAllGroupChats},
        ${chatFolderRow.includedConversationIds},
        ${chatFolderRow.excludedConversationIds},
        ${chatFolderRow.deletedAtTimestampMs},
        ${chatFolderRow.storageID},
        ${chatFolderRow.storageVersion},
        ${chatFolderRow.storageUnknownFields},
        ${chatFolderRow.storageNeedsSync}
      )
    `;
    db.prepare(chatFolderQuery).run(chatFolderParams);
  })();
}

export function updateChatFolder(db: WritableDB, chatFolder: ChatFolder): void {
  return db.transaction(() => {
    const chatFolderRow = chatFolderToRow(chatFolder);
    const [chatFolderQuery, chatFolderParams] = sql`
      UPDATE chatFolders
      SET
        id = ${chatFolderRow.id},
        folderType = ${chatFolderRow.folderType},
        name = ${chatFolderRow.name},
        position = ${chatFolderRow.position},
        showOnlyUnread = ${chatFolderRow.showOnlyUnread},
        showMutedChats = ${chatFolderRow.showMutedChats},
        includeAllIndividualChats = ${chatFolderRow.includeAllIndividualChats},
        includeAllGroupChats = ${chatFolderRow.includeAllGroupChats},
        includedConversationIds = ${chatFolderRow.includedConversationIds},
        excludedConversationIds = ${chatFolderRow.excludedConversationIds},
        deletedAtTimestampMs = ${chatFolderRow.deletedAtTimestampMs},
        storageID = ${chatFolderRow.storageID},
        storageVersion = ${chatFolderRow.storageVersion},
        storageUnknownFields = ${chatFolderRow.storageUnknownFields},
        storageNeedsSync = ${chatFolderRow.storageNeedsSync}
      WHERE
        id = ${chatFolderRow.id}
    `;
    db.prepare(chatFolderQuery).run(chatFolderParams);
  })();
}

const EMPTY_ARRAY = JSON.stringify([]);

export function markChatFolderDeleted(
  db: WritableDB,
  id: ChatFolderId,
  deletedAtTimestampMs: number,
  storageNeedsSync: boolean
): void {
  return db.transaction(() => {
    const [query, params] = sql`
      UPDATE chatFolders
      SET
        position = ${CHAT_FOLDER_DELETED_POSITION},
        deletedAtTimestampMs = ${deletedAtTimestampMs},
        storageNeedsSync = ${storageNeedsSync ? 1 : 0},
        includedConversationIds = ${EMPTY_ARRAY},
        excludedConversationIds = ${EMPTY_ARRAY}
      WHERE id = ${id}
    `;
    db.prepare(query).run(params);
    _resetAllChatFolderPositions(db);
  })();
}

function _resetAllChatFolderPositions(db: WritableDB) {
  const [query, params] = sql`
    SELECT id FROM chatFolders
    WHERE deletedAtTimestampMs IS 0
    ORDER BY position ASC
  `;

  db.prepare(query, { pluck: true })
    .all<ChatFolderId>(params)
    .forEach((id, index) => {
      const [update, updateParams] = sql`
        UPDATE chatFolders
        SET
          position = ${index},
          storageNeedsSync = 1
        WHERE id = ${id}
      `;
      db.prepare(update).run(updateParams);
    });
}

export function updateChatFolderPositions(
  db: WritableDB,
  chatFolders: ReadonlyArray<ChatFolder>
): void {
  return db.transaction(() => {
    for (const chatFolder of chatFolders) {
      const [query, params] = sql`
        UPDATE chatFolders
        SET
          position = ${chatFolder.position},
          storageNeedsSync = 1
        WHERE id = ${chatFolder.id}
      `;
      db.prepare(query).run(params);
    }
  })();
}

export function updateChatFolderDeletedAtTimestampMsFromSync(
  db: WritableDB,
  chatFolderId: ChatFolderId,
  deletedAtTimestampMs: number
): void {
  return db.transaction(() => {
    const [update, updateParams] = sql`
      UPDATE chatFolders
      SET deletedAtTimestampMs = ${deletedAtTimestampMs}
      WHERE id = ${chatFolderId}
    `;
    db.prepare(update).run(updateParams);
  })();
}

export function getOldestDeletedChatFolder(db: ReadableDB): ChatFolder | null {
  const [query, params] = sql`
    SELECT *
    FROM chatFolders
    WHERE deletedAtTimestampMs > 0
    ORDER BY deletedAtTimestampMs ASC
    LIMIT 1
  `;
  const row = db.prepare(query).get<ChatFolderRow>(params);
  if (row == null) {
    return null;
  }
  return rowToChatFolder(row);
}

export function deleteExpiredChatFolders(
  db: WritableDB,
  messageQueueTime: number
): ReadonlyArray<ChatFolderId> {
  const before = Date.now() - messageQueueTime;
  const [query, params] = sql`
    DELETE FROM chatFolders
    WHERE deletedAtTimestampMs > 0
      AND deletedAtTimestampMs < ${before}
    RETURNING id
  `;
  return db.prepare(query, { pluck: true }).all<ChatFolderId>(params);
}