import js from "@eslint/js";
import globals from "globals";
import tseslint from "typescript-eslint";
import { defineConfig } from "eslint/config";
import unusedImports from "eslint-plugin-unused-imports";
import unicorn from "eslint-plugin-unicorn";

export default defineConfig([
    // 全局忽略声明文件
    { ignores: ["**/*.d.ts"] },
    {
        files: ["**/*.ts"],
        plugins: { js, ...(unusedImports ? { "unused-imports": unusedImports } : {}), unicorn },
        extends: ["js/recommended"],
        languageOptions: { globals: globals.browser },
        rules: {
            // 当插件可用时，启用自动清理未使用的 import；否则回退到 TS 的未使用变量规则
            ...(unusedImports
                ? {
                      "unused-imports/no-unused-imports": "error",
                      "unused-imports/no-unused-vars": [
                          "warn",
                          {
                              vars: "all",
                              varsIgnorePattern: "^_",
                              args: "after-used",
                              argsIgnorePattern: "^_",
                              ignoreRestSiblings: true,
                          },
                      ],
                      "@typescript-eslint/no-unused-vars": "off",
                  }
                : {
                      "@typescript-eslint/no-unused-vars": [
                          "warn",
                          {
                              vars: "all",
                              varsIgnorePattern: "^_",
                              args: "after-used",
                              argsIgnorePattern: "^_",
                              ignoreRestSiblings: true,
                          },
                      ],
                  }),
            // 统一 try/catch 的错误变量名为 err
            "unicorn/catch-error-name": ["error", { name: "err" }],
            // 未重新赋值的变量使用 const
            "prefer-const": [
                "error",
                {
                    destructuring: "all",
                },
            ],
            // 禁用 var 声明
            "no-var": "error",
        },
    },
    ...tseslint.configs.recommended.map((cfg) => ({ ...cfg, files: ["**/*.ts"] })),
    // 在所有 TS 推荐配置之后，显式关闭冲突的未使用变量规则
    {
        files: ["**/*.ts"],
        rules: {
            "@typescript-eslint/no-unused-vars": "off",
        },
    },
]);