import { DocumentTable, DocumentTableSnapshot, TableRowData, TableSchema } from "@/types/online-table";

// 默认表格结构：全部为空列，交由用户/全屏自行定义
export const DEFAULT_TABLE_SCHEMA: TableSchema = {
  columns: [],
  frozenRowCount: 0,
  frozenColCount: 0,
};

export const DEFAULT_TABLE_ROWS = 50;
export const DEFAULT_TABLE_COLUMNS = 15;

export const createDefaultTableSnapshot = (schema: TableSchema): DocumentTableSnapshot => {
  const frozenRowCount = schema.frozenRowCount ?? 0;
  const frozenColCount = schema.frozenColCount ?? 0;
  return {
    rows: [],
    luckysheet: [
      {
        name: "Sheet1",
        index: 0,
        status: 1,
        order: 0,
        hide: 0,
        row: DEFAULT_TABLE_ROWS,
        column: DEFAULT_TABLE_COLUMNS,
        defaultRowHeight: 19,
        defaultColWidth: 73,
        celldata: [],
        config: {
          columnlen: {},
          rowlen: {},
        },
        frozen: {
          type: frozenRowCount > 0 || frozenColCount > 0 ? "both" : undefined,
          row_focus: frozenRowCount,
          column_focus: frozenColCount,
        },
        scrollLeft: 0,
        scrollTop: 0,
        zoomRatio: 1,
        showGridLines: true,
      },
    ],
  };
};

/**
 * 在 Supabase 中创建一个新的在线表格并返回元数据。
 * @param documentId 当前文档的 ID
 * @param title 表格的初始标题
 * @returns 新创建的 DocumentTable
 */
export async function createOnlineTable(
  documentId: string,
  title: string = "未命名表格"
): Promise<DocumentTable> {
  // 假设 Next.js API 路由 /api/tables/create 负责与 Supabase 交互
  const response = await fetch("/api/tables/create", {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      documentId,
      title,
      schema: DEFAULT_TABLE_SCHEMA,
      snapshot: createDefaultTableSnapshot(DEFAULT_TABLE_SCHEMA),
    }),
  });

  if (!response.ok) {
    throw new Error("Failed to create online table.");
  }

  const newTable: DocumentTable = await response.json();
  return newTable;
}

/**
 * 获取表格元数据 (用于紧凑模式渲染)
 * 实际实现中，这可能需要一个更复杂的获取逻辑，例如同时获取前 N 行数据
 */
export async function getDocumentTable(tableId: string): Promise<DocumentTable> {
  const response = await fetch(`/api/tables/${tableId}`, {
    method: "GET",
    headers: { "Content-Type": "application/json" },
  });

  if (!response.ok) {
    throw new Error("Failed to fetch document table.");
  }

  return response.json() as Promise<DocumentTable>;
}

/**
 * 将表格的 snapshot/行数据回写 Supabase，保持内联与全屏视图一致。
 */
export async function saveOnlineTable(
  tableId: string,
  payload: {
    title?: string;
    schema?: TableSchema;
    snapshot?: DocumentTableSnapshot | null;
    rows?: TableRowData[];
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    viewPreferences?: Record<string, any>;
  },
): Promise<DocumentTable> {
  const response = await fetch(`/api/tables/${tableId}`, {
    method: "PATCH",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(payload),
  });

  if (!response.ok) {
    const message = await response.text().catch(() => "");
    throw new Error(message || "Failed to save online table.");
  }

  return response.json() as Promise<DocumentTable>;
}

/**
 * 删除表格及其行数据。
 */
export async function deleteOnlineTable(tableId: string): Promise<void> {
  const response = await fetch(`/api/tables/${tableId}`, {
    method: "DELETE",
    headers: { "Content-Type": "application/json" },
  });

  if (!response.ok) {
    throw new Error("Failed to delete online table.");
  }
}