import type { SetOptional } from 'type-fest';
import type { StorageHash } from '@cloudpss/object-storage';
import type { ResourceRevisionOf } from './known-resource-types.js';
import { isResourceId, type ResourceId } from './resource-id.js';
// eslint-disable-next-line @typescript-eslint/no-unused-vars
import type { ResourcePermissions, ResourcePermission } from './permission.js';
import type { Page } from './page.js';
import type { ResourceTag } from './tag.js';

/**
 * 表示一个资源
 */
export interface Resource<T extends string = string, TRevision extends ResourceRevisionOf<T> = ResourceRevisionOf<T>> {
    /** RID，空表示尚未保存过 {@link ResourcePermission.READ_META} */
    rid: ResourceId<T>;
    /** 名称 {@link ResourcePermission.READ_META}/{@link ResourcePermission.WRITE_META} */
    name: string;
    /** 描述 {@link ResourcePermission.READ_META}/{@link ResourcePermission.WRITE_META} */
    description: string;
    /** 资源的标签 {@link ResourcePermission.READ_META}/{@link ResourcePermission.WRITE_META} */
    tags: ResourceTag[];
    /** 资源的关键词 {@link ResourcePermission.READ_META}/{@link ResourcePermission.WRITE_META} */
    keywords: string[];
    /** 资源权限 {@link ResourcePermission.READ_META}/{@link ResourcePermission.ADMIN} */
    permissions: ResourcePermissions;
    /** 资源的数据 {@link ResourcePermission.READ}/{@link ResourcePermission.WRITE} */
    revision: TRevision;
    /** 资源的附加存储 {@link ResourcePermission.READ}/{@link ResourcePermission.WRITE} */
    storage?: StorageHash[];
    /** 资源关联的发布页面 {@link ResourcePermission.READ_META}/{@link ResourcePermission.PUBLISH} */
    pages?: Page[];
}

/** 检查是否为资源 */
export function isResource<
    AllowUnsaved extends boolean = false,
    T extends string = string,
    TRevision extends ResourceRevisionOf<T> = ResourceRevisionOf<T>,
>(
    value: unknown,
    allowUnsaved?: AllowUnsaved,
): value is AllowUnsaved extends true ? SetOptional<Resource<T, TRevision>, 'rid'> : Resource<T, TRevision> {
    if (value == null || typeof value != 'object') return false;
    const res = value as Resource;
    if (typeof res.name != 'string') return false;
    if (typeof res.description != 'string') return false;
    if (!Array.isArray(res.tags) || !res.tags.every((v) => typeof v == 'string')) return false;
    if (!Array.isArray(res.keywords) || !res.keywords.every((v) => typeof v == 'string')) return false;
    if (res.revision == null || typeof res.revision != 'object') return false;

    if (allowUnsaved && !res.rid) return true;
    return isResourceId(res.rid);
}

/** 检查资源是否未保存 */
export function isResourceUnsaved(value: Resource): boolean {
    return !value.rid;
}