import { GmBuiltinPanelId, GmKind, type IGmCommand, type IGmConfirmData, type IGmNumberStepperData, type IGmTextAreaData } from './GmTypes';
import { GmRegistry } from './GmRegistry';

/**
 * 极简 GM 注册器：链式写几行即可挂命令，不必手拼 IGmCommand。
 *
 * @example
 * ```ts
 * new GmEasy()
 *   .tab('常用')
 *   .btn('复制存档', () => copy())
 *   .sw('显示广告', () => on, v => set(v))
 *   .num('金钱', () => get(), v => set(v))
 *   .page('道具', 'itemPicker', () => '点选')
 *   .commit();
 * ```
 */
export class GmEasy {
    private readonly _cmds: IGmCommand[] = [];
    private _group = '常用';
    private _order = 0;
    private _seq = 0;

    /**
     * 切换 Tab 分组（后续命令都进这个分组）。
     */
    tab(name: string): this {
        if (!name) {
            console.warn('[GmEasy] tab 名为空');
            return this;
        }
        this._group = name;
        return this;
    }

    /**
     * 快捷按钮：点一下执行。
     */
    btn(title: string, run: () => void | Promise<void>): this {
        this._push({
            id: this._id('btn'),
            title,
            group: this._group,
            kind: GmKind.Quick,
            order: ++this._order,
            run,
        });
        return this;
    }

    /**
     * 滑动开关。
     */
    sw(title: string, get: () => boolean, set: (on: boolean) => void): this {
        this._push({
            id: this._id('sw'),
            title,
            group: this._group,
            kind: GmKind.Toggle,
            order: ++this._order,
            get,
            set,
        });
        return this;
    }

    /**
     * 数值：列表内「设为」覆盖 + ± 增减。
     * @param setValue 写入绝对值（增减由壳层算好再传入）
     */
    num(title: string, getValue: () => number, setValue: (v: number) => void, min = 0): this {
        const panelData: IGmNumberStepperData = {
            getValue,
            apply: (v) => setValue(v),
            min,
            defaultMode: 'set',
        };
        this._push({
            id: this._id('num'),
            title,
            group: this._group,
            kind: GmKind.Content,
            order: ++this._order,
            panelId: GmBuiltinPanelId.numberStepper,
            panelData,
            summary: () => `${Math.floor(Number(getValue()) || 0)}`,
        });
        return this;
    }

    /**
     * 打开已注册的内容面板（如道具点选）。
     */
    page(title: string, panelId: string, summary?: () => string, panelData?: unknown): this {
        this._push({
            id: this._id('page'),
            title,
            group: this._group,
            kind: GmKind.Content,
            order: ++this._order,
            panelId,
            panelData,
            summary: summary ?? (() => '›'),
        });
        return this;
    }

    /**
     * 危险操作（二次确认）。
     */
    danger(title: string, message: string, onConfirm: () => void): this {
        const panelData: IGmConfirmData = { message, onConfirm };
        this._push({
            id: this._id('danger'),
            title,
            group: this._group,
            kind: GmKind.Content,
            order: ++this._order,
            panelId: GmBuiltinPanelId.confirmQuick,
            panelData,
            summary: () => '危险',
        });
        return this;
    }

    /**
     * 大段文本（如粘贴存档 JSON）。
     */
    text(title: string, apply: (raw: string) => void, placeholder = '粘贴内容'): this {
        const panelData: IGmTextAreaData = { placeholder, apply };
        this._push({
            id: this._id('text'),
            title,
            group: this._group,
            kind: GmKind.Content,
            order: ++this._order,
            panelId: GmBuiltinPanelId.textArea,
            panelData,
            summary: () => '粘贴',
        });
        return this;
    }

    /**
     * 当前 Tab 直接嵌入内容面板（整页展示，无列表入口）。
     */
    embed(panelId: string): this {
        this._push({
            id: this._id('embed'),
            title: this._group,
            group: this._group,
            kind: GmKind.Content,
            order: ++this._order,
            panelId,
            embed: true,
        });
        return this;
    }

    /**
     * 提交注册到 Registry。
     */
    commit(): void {
        if (this._cmds.length <= 0) {
            console.warn('[GmEasy] commit 时没有任何命令');
            return;
        }
        GmRegistry.register(this._cmds);
    }

    private _id(prefix: string): string {
        this._seq++;
        return `easy.${prefix}.${this._seq}`;
    }

    private _push(cmd: IGmCommand): void {
        if (!cmd.title) {
            console.warn('[GmEasy] 跳过无标题命令');
            return;
        }
        this._cmds.push(cmd);
    }
}