import { createStore } from "solid-js/store";
import type { MdCommanderCommand, MdCommanderCommandMap } from "../types";
import { setupHelpCommand, clearCommand, rollCommand, trackCommand, untrackCommand, listTrackCommand } from "../commands";
import {resolvePath} from "../../utils/path";
import {loadCSVFromPath} from "../../utils/csv-loader";

const defaultCommands: MdCommanderCommandMap = {
  help: setupHelpCommand({}),
  clear: clearCommand,
  roll: rollCommand,
  track: trackCommand,
  untrack: untrackCommand,
  list: listTrackCommand,
};

export interface CommandsStoreState {
  commands: MdCommanderCommandMap;
  initialized: boolean;
  loading: boolean;
  error?: string;
}

const [commandsStore, setCommandsStore] = createStore<CommandsStoreState>({
  commands: { ...defaultCommands },
  initialized: false,
  loading: false,
});

/**
 * 初始化命令（包括 help 命令的动态更新）
 */
export function initializeCommands(customCommands?: MdCommanderCommandMap): MdCommanderCommandMap {
  const commands = { ...defaultCommands, ...customCommands };
  // 更新 help 命令的命令列表
  commands.help = setupHelpCommand(commands);
  return commands;
}

/**
 * 注册命令到 store
 */
export function registerCommands(customCommands?: MdCommanderCommandMap): void {
  const commands = initializeCommands(customCommands);
  setCommandsStore({ commands, initialized: true, loading: false });
}

/**
 * 从 store 获取命令
 */
export function getCommands(): MdCommanderCommandMap {
  return commandsStore.commands;
}

/**
 * 检查命令是否已初始化
 */
export function isCommandsInitialized(): boolean {
  return commandsStore.initialized;
}

/**
 * 获取单个命令
 */
export function getCommand(name: string): MdCommanderCommand | undefined {
  return commandsStore.commands[name];
}

/**
 * 获取加载状态
 */
export function getCommandsLoading(): boolean {
  return commandsStore.loading;
}

/**
 * 获取错误信息
 */
export function getCommandsError(): string | undefined {
  return commandsStore.error;
}

/**
 * 设置加载状态
 */
export function setCommandsLoading(loading: boolean): void {
  setCommandsStore("loading", loading);
}

/**
 * 设置错误信息
 */
export function setCommandsError(error?: string): void {
  setCommandsStore("error", error);
}

/**
 * 更新命令
 */
export function updateCommands(updater: (prev: MdCommanderCommandMap) => MdCommanderCommandMap): void {
  setCommandsStore("commands", (prev) => updater(prev));
}

/**
 * 从 CSV 文件加载命令模板并更新命令定义
 */
export async function loadCommandTemplatesFromCSV(
  path: string,
  articlePath: string
): Promise<void> {
  setCommandsLoading(true);
  setCommandsError(undefined);
  
  try {
    const csv = await loadCSVFromPath<CommandTemplateRow>(resolvePath(articlePath, path));

    // 按命令分组模板
    const templatesByCommand = new Map<string, CommandTemplateRow[]>();
    for (const row of csv) {
      if (!row.command || !row.label || !row.insertedText) continue;

      if (!templatesByCommand.has(row.command)) {
        templatesByCommand.set(row.command, []);
      }
      templatesByCommand.get(row.command)!.push(row);
    }

    // 为每个命令添加模板
    updateCommands((prev) => {
      const updated = { ...prev };
      for (const [commandName, rows] of templatesByCommand.entries()) {
        const cmd = updated[commandName];
        if (!cmd || !cmd.parameters) continue;

        const templates = rows.map((row) => ({
          label: row.label,
          description: row.description || "",
          insertText: row.insertedText,
        }));

        // 为每个参数添加模板
        updated[commandName] = {
          ...cmd,
          parameters: cmd.parameters.map((param) => ({
            ...param,
            templates: param.templates ? [...param.templates, ...templates] : templates,
          })),
        };
      }
      return updated;
    });
    
    setCommandsStore("initialized", true);
  } catch (error) {
    const errorMessage = error instanceof Error ? error.message : String(error);
    setCommandsError(`加载命令模板失败：${errorMessage}`);
    console.warn(`Error loading command templates from ${path}:`, error);
  } finally {
    setCommandsLoading(false);
  }
}

interface CommandTemplateRow {
  command: string;
  parameter: string;
  label: string;
  description: string;
  insertedText: string;
}