/** Renders a vnode structure into a DOM element. */
declare function render(el: Element, vnodes: Mithril.Children): void;

/** Mounts a component to a DOM element, enabling it to autoredraw on user events. */
declare function mount(element: Element, component: Mithril.ComponentTypes<any, any>): void;
/** Unmounts a component from a DOM element. */
declare function mount(element: Element, component: null): void; // tslint:disable-line unified-signatures

/** Returns a shallow-cloned object with lifecycle attributes and any given custom attributes omitted. */
declare function censor<
    O extends Record<string, any>,
    E extends readonly string[] = readonly [],
>(object: O, extra?: E): Omit<Mithril._NoLifecycle<O>, E[number]>;

/** Makes an XHR request and returns a promise. */
declare function request<T>(options: Mithril.RequestOptions<T> & { url: string }): Promise<T>;
/** Makes an XHR request and returns a promise. */
declare function request<T>(url: string, options?: Mithril.RequestOptions<T>): Promise<T>;

/** Makes a JSON-P request and returns a promise. */
declare function jsonp<T>(options: Mithril.JsonpOptions & { url: string }): Promise<T>; // eslint-disable-line @definitelytyped/no-unnecessary-generics
/** Makes a JSON-P request and returns a promise. */
declare function jsonp<T>(url: string, options?: Mithril.JsonpOptions): Promise<T>; // eslint-disable-line @definitelytyped/no-unnecessary-generics

declare namespace Mithril {
    interface CommonAttributes<Attrs, State> {
        /** The oninit hook is called before a vnode is touched by the virtual DOM engine. */
        oninit?(this: State, vnode: Vnode<Attrs, State>): any;
        /** The oncreate hook is called after a DOM element is created and attached to the document. */
        oncreate?(this: State, vnode: VnodeDOM<Attrs, State>): any;
        /** The onbeforeremove hook is called before a DOM element is detached from the document. If a Promise is returned, Mithril only detaches the DOM element after the promise completes. */
        // eslint-disable-next-line @typescript-eslint/no-invalid-void-type
        onbeforeremove?(this: State, vnode: VnodeDOM<Attrs, State>): Promise<any> | void;
        /** The onremove hook is called before a DOM element is removed from the document. */
        onremove?(this: State, vnode: VnodeDOM<Attrs, State>): any;
        /** The onbeforeupdate hook is called before a vnode is diffed in a update. */
        // eslint-disable-next-line @typescript-eslint/no-invalid-void-type
        onbeforeupdate?(this: State, vnode: Vnode<Attrs, State>, old: VnodeDOM<Attrs, State>): boolean | void;
        /** The onupdate hook is called after a DOM element is updated, while attached to the document. */
        onupdate?(this: State, vnode: VnodeDOM<Attrs, State>): any;
        /** A key to optionally associate with this element. */
        key?: string | number | undefined;
    }

    interface Hyperscript {
        /** Creates a virtual element (Vnode). */
        (selector: string, attributes: Attributes, ...children: Children[]): Vnode<any, any>;
        /** Creates a virtual element (Vnode). */
        (selector: string, ...children: Children[]): Vnode<any, any>;
        /** Creates a virtual element (Vnode). */
        <Attrs, State>(component: ComponentTypes<Attrs, State>, ...args: Children[]): Vnode<Attrs, State>;
        /** Creates a virtual element (Vnode). */
        <Attrs, State>(
            component: ComponentTypes<Attrs, State>,
            attributes: Attrs & CommonAttributes<Attrs, State>,
            ...args: Children[]
        ): Vnode<Attrs, State>;
        /** Creates a fragment virtual element (Vnode). */
        fragment(
            attrs: CommonAttributes<any, any> & { [key: string]: any },
            children: ChildArrayOrPrimitive,
        ): Vnode<any, any>;
        /** Turns an HTML string into a virtual element (Vnode). Do not use trust on unsanitized user input. */
        trust(html: string): Vnode<any, any>;
    }

    interface RouteResolver<Attrs = {}, State = {}> {
        /** The onmatch hook is called when the router needs to find a component to render. */
        onmatch?(
            this: this,
            args: Attrs,
            requestedPath: string,
            route: string,
            // eslint-disable-next-line @typescript-eslint/no-invalid-void-type
        ): ComponentTypes<any, any> | Promise<any> | void;
        /** The render method is called on every redraw for a matching route. */
        render?(this: this, vnode: Vnode<Attrs, State>): Children;
    }

    /** This represents a key-value mapping linking routes to components. */
    interface RouteDefs {
        /** The key represents the route. The value represents the corresponding component. */
        [url: string]: ComponentTypes<any, any> | RouteResolver<any, any>;
    }

    interface RouteOptions {
        /** Routing parameters. If path has routing parameter slots, the properties of this object are interpolated into the path string. */
        replace?: boolean | undefined;
        /** The state object to pass to the underlying history.pushState / history.replaceState call. */
        state?: any;
        /** The title string to pass to the underlying history.pushState / history.replaceState call. */
        title?: string | undefined;
    }

    interface RouteLinkAttrs extends Attributes {
        href: string;
        selector?: string | ComponentTypes<any> | undefined;
        options?: RouteOptions | undefined;
    }

    interface Route {
        /** Creates application routes and mounts Components and/or RouteResolvers to a DOM element. */
        (element: Element, defaultRoute: string, routes: RouteDefs): void;
        /** Returns the last fully resolved routing path, without the prefix. */
        get(): string;
        /** Redirects to a matching route or to the default route if no matching routes can be found. */
        set(route: string, data?: any, options?: RouteOptions): void;
        /** Defines a router prefix which is a fragment of the URL that dictates the underlying strategy used by the router. */
        prefix: string;
        /** This Component renders a link <a href> that will use the current routing strategy */
        Link: Component<RouteLinkAttrs>;
        /** Returns the named parameter value from the current route. */
        param(name: string): string;
        /** Gets all route parameters. */
        param(): any;
        /** Special value to SKIP current route */
        SKIP: any;
    }

    interface RequestOptions<T> {
        /** The HTTP method to use. */
        method?: string | undefined;
        /** The data to be interpolated into the URL and serialized into the querystring. */
        params?: { [key: string]: any } | undefined;
        /** The data to be serialized into the request body. */
        body?:
            | (XMLHttpRequest["send"] extends (x: infer R) => any ? R : never)
            | (object & { [id: string]: any })
            | undefined;
        /** Whether the request should be asynchronous. Defaults to true. */
        async?: boolean | undefined;
        /** A username for HTTP authorization. */
        user?: string | undefined;
        /** A password for HTTP authorization. */
        password?: string | undefined;
        /** Whether to send cookies to 3rd party domains. */
        withCredentials?: boolean | undefined;
        /** Exposes the underlying XMLHttpRequest object for low-level configuration. */
        // eslint-disable-next-line @typescript-eslint/no-invalid-void-type
        config?(xhr: XMLHttpRequest, options: this): XMLHttpRequest | void;
        /** Headers to append to the request before sending it. */
        headers?: { [key: string]: string } | undefined;
        /** A constructor to be applied to each object in the response. */
        type?: new(o: any) => any;
        /** A serialization method to be applied to data. Defaults to JSON.stringify, or if options.data is an instance of FormData, defaults to the identity function. */
        serialize?(data: any): any;
        /** A deserialization method to be applied to the response. Defaults to a small wrapper around JSON.parse that returns null for empty responses. */
        deserialize?(data: string): T;
        /** A hook to specify how the XMLHttpRequest response should be read. Useful for reading response headers and cookies. Defaults to a function that returns xhr.responseText */
        extract?(xhr: XMLHttpRequest, options: this): T;
        /**
         * Force the use of the HTTP body section for data in GET requests when set to true,
         * or the use of querystring for other HTTP methods when set to false.
         * Defaults to false for GET requests and true for other methods.
         */
        useBody?: boolean | undefined;
        /** If false, redraws mounted components upon completion of the request. If true, it does not. */
        background?: boolean | undefined;
        /** Milliseconds a request can take before automatically being terminated. */
        timeout?: number | undefined;
        /** The expected type of the response, as a legal value of XMLHttpRequest.responseType. */
        responseType?: "" | "arraybuffer" | "blob" | "document" | "json" | "text" | undefined;
    }

    interface JsonpOptions {
        /** The data to be interpolated into the URL and serialized into the querystring. */
        params?: { [id: string]: any } | undefined;
        /** The data to be serialized into the request body. */
        body?: any;
        /** A constructor to be applied to each object in the response. */
        type?: new(o: any) => any;
        /** The name of the function that will be called as the callback. */
        callbackName?: string | undefined;
        /** The name of the querystring parameter name that specifies the callback name. */
        callbackKey?: string | undefined;
        /** If false, redraws mounted components upon completion of the request. If true, it does not. */
        background?: boolean | undefined;
    }

    interface Redraw {
        /** Manually triggers an asynchronous redraw of mounted components. */
        (): void;
        /** Manually triggers a synchronous redraw of mounted components. */
        sync(): void;
    }

    type Params = object & ParamsRec;

    interface ParamsRec {
        // Ideally, it'd be this:
        // `[key: string | number]: Params | !symbol & !object`
        [key: string]: string | number | boolean | null | undefined | Params;
    }

    interface Static extends Hyperscript {
        censor: typeof censor;
        route: Route;
        mount: typeof mount;
        render: typeof render;
        redraw: Redraw;
        request: typeof request;
        jsonp: typeof jsonp;
        /** Returns an object with key/value pairs parsed from a string of the form: ?a=1&b=2 */
        parseQueryString(queryString: string): Params;
        /** Turns the key/value pairs of an object into a string of the form: a=1&b=2 */
        buildQueryString(values: Params): string;
        /** Parse path name */
        parsePathname(url: string): { path: string; params: Params };
        /** Build path name */
        buildPathname(template: string, params?: Params): string;
    }

    // Vnode children types
    type Child = Vnode<any, any> | string | number | boolean | null | undefined;
    interface ChildArray extends Array<Children> {}
    type Children = Child | ChildArray;
    type ChildArrayOrPrimitive = ChildArray | string | number | boolean;

    /** Virtual DOM nodes, or vnodes, are Javascript objects that represent an element (or parts of the DOM). */
    interface Vnode<Attrs = {}, State = {}> {
        /** The nodeName of a DOM element. It may also be the string [ if a vnode is a fragment, # if it's a text vnode, or < if it's a trusted HTML vnode. Additionally, it may be a component. */
        tag: string | ComponentTypes<Attrs, State>;
        /** A hashmap of DOM attributes, events, properties and lifecycle methods. */
        attrs: Attrs;
        /** An object that is persisted between redraws. In component vnodes, state is a shallow clone of the component object. */
        state: State;
        /** The value used to map a DOM element to its respective item in an array of data. */
        key?: string | number | undefined;
        /** In most vnode types, the children property is an array of vnodes. For text and trusted HTML vnodes, The children property is either a string, a number or a boolean. */
        children?: ChildArrayOrPrimitive | undefined;
        /**
         * This is used instead of children if a vnode contains a text node as its only child.
         * This is done for performance reasons.
         * Component vnodes never use the text property even if they have a text node as their only child.
         */
        text?: string | number | boolean | undefined;
    }

    // In some lifecycle methods, Vnode will have a dom property
    // and possibly a domSize property.
    interface VnodeDOM<Attrs = {}, State = {}> extends Vnode<Attrs, State> {
        /** Points to the element that corresponds to the vnode. */
        dom: Element;
        /** This defines the number of DOM elements that the vnode represents (starting from the element referenced by the dom property). */
        domSize?: number | undefined;
    }

    type _NoLifecycle<T> = Omit<T, keyof Component>;

    interface CVnode<A = {}> extends Vnode<A, ClassComponent<A>> {}

    interface CVnodeDOM<A = {}> extends VnodeDOM<A, ClassComponent<A>> {}

    /**
     * Components are a mechanism to encapsulate parts of a view to make code easier to organize and/or reuse.
     * Any Javascript object that has a view method can be used as a Mithril component.
     * Components can be consumed via the m() utility.
     */
    interface Component<Attrs = {}, State = {}> {
        /** The oninit hook is called before a vnode is touched by the virtual DOM engine. */
        oninit?(this: _NoLifecycle<this & State>, vnode: Vnode<Attrs, _NoLifecycle<this & State>>): any;
        /** The oncreate hook is called after a DOM element is created and attached to the document. */
        oncreate?(this: _NoLifecycle<this & State>, vnode: VnodeDOM<Attrs, _NoLifecycle<this & State>>): any;
        /** The onbeforeremove hook is called before a DOM element is detached from the document. If a Promise is returned, Mithril only detaches the DOM element after the promise completes. */
        onbeforeremove?(
            this: _NoLifecycle<this & State>,
            vnode: VnodeDOM<Attrs, _NoLifecycle<this & State>>,
            // eslint-disable-next-line @typescript-eslint/no-invalid-void-type
        ): Promise<any> | void;
        /** The onremove hook is called before a DOM element is removed from the document. */
        onremove?(this: _NoLifecycle<this & State>, vnode: VnodeDOM<Attrs, _NoLifecycle<this & State>>): any;
        /** The onbeforeupdate hook is called before a vnode is diffed in a update. */
        onbeforeupdate?(
            this: _NoLifecycle<this & State>,
            vnode: Vnode<Attrs, _NoLifecycle<this & State>>,
            old: VnodeDOM<Attrs, _NoLifecycle<this & State>>,
            // eslint-disable-next-line @typescript-eslint/no-invalid-void-type
        ): boolean | void;
        /** The onupdate hook is called after a DOM element is updated, while attached to the document. */
        onupdate?(this: _NoLifecycle<this & State>, vnode: VnodeDOM<Attrs, _NoLifecycle<this & State>>): any;
        /** Creates a view out of virtual elements. */
        // eslint-disable-next-line @typescript-eslint/no-invalid-void-type
        view(this: _NoLifecycle<this & State>, vnode: Vnode<Attrs, _NoLifecycle<this & State>>): Children | null | void;
    }

    /**
     * Components are a mechanism to encapsulate parts of a view to make code easier to organize and/or reuse.
     * Any class that implements a view method can be used as a Mithril component.
     * Components can be consumed via the m() utility.
     */
    interface ClassComponent<A = {}> {
        /** The oninit hook is called before a vnode is touched by the virtual DOM engine. */
        oninit?(vnode: Vnode<A, this>): any;
        /** The oncreate hook is called after a DOM element is created and attached to the document. */
        oncreate?(vnode: VnodeDOM<A, this>): any;
        /** The onbeforeremove hook is called before a DOM element is detached from the document. If a Promise is returned, Mithril only detaches the DOM element after the promise completes. */
        // eslint-disable-next-line @typescript-eslint/no-invalid-void-type
        onbeforeremove?(vnode: VnodeDOM<A, this>): Promise<any> | void;
        /** The onremove hook is called before a DOM element is removed from the document. */
        onremove?(vnode: VnodeDOM<A, this>): any;
        /** The onbeforeupdate hook is called before a vnode is diffed in a update. */
        // eslint-disable-next-line @typescript-eslint/no-invalid-void-type
        onbeforeupdate?(vnode: Vnode<A, this>, old: VnodeDOM<A, this>): boolean | void;
        /** The onupdate hook is called after a DOM element is updated, while attached to the document. */
        onupdate?(vnode: VnodeDOM<A, this>): any;
        /** Creates a view out of virtual elements. */
        // eslint-disable-next-line @typescript-eslint/no-invalid-void-type
        view(vnode: Vnode<A, this>): Children | null | void;
    }

    /**
     * Components are a mechanism to encapsulate parts of a view to make code easier to organize and/or reuse.
     * Any function that returns an object with a view method can be used as a Mithril component.
     * Components can be consumed via the m() utility.
     */
    type FactoryComponent<A = {}> = (vnode: Vnode<A>) => Component<A>;

    /**
     * Components are a mechanism to encapsulate parts of a view to make code easier to organize and/or reuse.
     * Any function that returns an object with a view method can be used as a Mithril component.
     * Components can be consumed via the m() utility.
     */
    type ClosureComponent<A = {}> = FactoryComponent<A>;

    /**
     * Components are a mechanism to encapsulate parts of a view to make code easier to organize and/or reuse.
     * Any Javascript object that has a view method is a Mithril component. Components can be consumed via the m() utility.
     */
    type Comp<Attrs = {}, State = {}> = _NoLifecycle<State> & Component<Attrs, _NoLifecycle<State>>;

    /** Components are a mechanism to encapsulate parts of a view to make code easier to organize and/or reuse. Components can be consumed via the m() utility. */
    type ComponentTypes<A = {}, S = {}> =
        | Component<A, S>
        | { new(vnode: CVnode<A>): ClassComponent<A> }
        | FactoryComponent<A>;

    /** This represents the attributes available for configuring virtual elements, beyond the applicable DOM attributes. */
    interface Attributes extends CommonAttributes<any, any> {
        /** The class name(s) for this virtual element, as a space-separated list. */
        className?: string | undefined;
        /** The class name(s) for this virtual element, as a space-separated list. */
        class?: string | undefined;
        /** Any other virtual element properties, including attributes and event handlers. */
        [property: string]: any;
    }
}

declare global {
    namespace JSX {
        // eslint-disable-next-line @typescript-eslint/no-empty-interface
        interface Element extends Mithril.Vnode {}

        // eslint-disable-next-line @typescript-eslint/no-empty-interface
        interface IntrinsicAttributes extends Mithril.Attributes {
            children?: Mithril.Children | HTMLCollection;
        }
        // eslint-disable-next-line @typescript-eslint/no-empty-interface
        interface IntrinsicClassAttributes extends Mithril.Attributes {}

        interface IntrinsicElements {
            // HTML
            a: Mithril.Attributes;
            abbr: Mithril.Attributes;
            address: Mithril.Attributes;
            area: Mithril.Attributes;
            article: Mithril.Attributes;
            aside: Mithril.Attributes;
            audio: Mithril.Attributes;
            b: Mithril.Attributes;
            base: Mithril.Attributes;
            bdi: Mithril.Attributes;
            bdo: Mithril.Attributes;
            big: Mithril.Attributes;
            blockquote: Mithril.Attributes;
            body: Mithril.Attributes;
            br: Mithril.Attributes;
            button: Mithril.Attributes;
            canvas: Mithril.Attributes;
            caption: Mithril.Attributes;
            cite: Mithril.Attributes;
            code: Mithril.Attributes;
            col: Mithril.Attributes;
            colgroup: Mithril.Attributes;
            data: Mithril.Attributes;
            datalist: Mithril.Attributes;
            dd: Mithril.Attributes;
            del: Mithril.Attributes;
            details: Mithril.Attributes;
            dfn: Mithril.Attributes;
            dialog: Mithril.Attributes;
            div: Mithril.Attributes;
            dl: Mithril.Attributes;
            dt: Mithril.Attributes;
            em: Mithril.Attributes;
            embed: Mithril.Attributes;
            fieldset: Mithril.Attributes;
            figcaption: Mithril.Attributes;
            figure: Mithril.Attributes;
            footer: Mithril.Attributes;
            form: Mithril.Attributes;
            h1: Mithril.Attributes;
            h2: Mithril.Attributes;
            h3: Mithril.Attributes;
            h4: Mithril.Attributes;
            h5: Mithril.Attributes;
            h6: Mithril.Attributes;
            head: Mithril.Attributes;
            header: Mithril.Attributes;
            hgroup: Mithril.Attributes;
            hr: Mithril.Attributes;
            html: Mithril.Attributes;
            i: Mithril.Attributes;
            iframe: Mithril.Attributes;
            img: Mithril.Attributes;
            input: Mithril.Attributes;
            ins: Mithril.Attributes;
            kbd: Mithril.Attributes;
            keygen: Mithril.Attributes;
            label: Mithril.Attributes;
            legend: Mithril.Attributes;
            li: Mithril.Attributes;
            link: Mithril.Attributes;
            main: Mithril.Attributes;
            map: Mithril.Attributes;
            mark: Mithril.Attributes;
            menu: Mithril.Attributes;
            menuitem: Mithril.Attributes;
            meta: Mithril.Attributes;
            meter: Mithril.Attributes;
            nav: Mithril.Attributes;
            noindex: Mithril.Attributes;
            noscript: Mithril.Attributes;
            object: Mithril.Attributes;
            ol: Mithril.Attributes;
            optgroup: Mithril.Attributes;
            option: Mithril.Attributes;
            output: Mithril.Attributes;
            p: Mithril.Attributes;
            param: Mithril.Attributes;
            picture: Mithril.Attributes;
            pre: Mithril.Attributes;
            progress: Mithril.Attributes;
            q: Mithril.Attributes;
            rp: Mithril.Attributes;
            rt: Mithril.Attributes;
            ruby: Mithril.Attributes;
            s: Mithril.Attributes;
            samp: Mithril.Attributes;
            script: Mithril.Attributes;
            section: Mithril.Attributes;
            select: Mithril.Attributes;
            small: Mithril.Attributes;
            source: Mithril.Attributes;
            span: Mithril.Attributes;
            strong: Mithril.Attributes;
            style: Mithril.Attributes;
            sub: Mithril.Attributes;
            summary: Mithril.Attributes;
            sup: Mithril.Attributes;
            table: Mithril.Attributes;
            template: Mithril.Attributes;
            tbody: Mithril.Attributes;
            td: Mithril.Attributes;
            textarea: Mithril.Attributes;
            tfoot: Mithril.Attributes;
            th: Mithril.Attributes;
            thead: Mithril.Attributes;
            time: Mithril.Attributes;
            title: Mithril.Attributes;
            tr: Mithril.Attributes;
            track: Mithril.Attributes;
            u: Mithril.Attributes;
            ul: Mithril.Attributes;
            var: Mithril.Attributes;
            video: Mithril.Attributes;
            wbr: Mithril.Attributes;
            webview: Mithril.Attributes;

            // SVG
            svg: Mithril.Attributes;
            animate: Mithril.Attributes;
            animateMotion: Mithril.Attributes;
            animateTransform: Mithril.Attributes;
            circle: Mithril.Attributes;
            clipPath: Mithril.Attributes;
            defs: Mithril.Attributes;
            desc: Mithril.Attributes;
            ellipse: Mithril.Attributes;
            feBlend: Mithril.Attributes;
            feColorMatrix: Mithril.Attributes;
            feComponentTransfer: Mithril.Attributes;
            feComposite: Mithril.Attributes;
            feConvolveMatrix: Mithril.Attributes;
            feDiffuseLighting: Mithril.Attributes;
            feDisplacementMap: Mithril.Attributes;
            feDistantLight: Mithril.Attributes;
            feDropShadow: Mithril.Attributes;
            feFlood: Mithril.Attributes;
            feFuncA: Mithril.Attributes;
            feFuncB: Mithril.Attributes;
            feFuncG: Mithril.Attributes;
            feFuncR: Mithril.Attributes;
            feGaussianBlur: Mithril.Attributes;
            feImage: Mithril.Attributes;
            feMerge: Mithril.Attributes;
            feMergeNode: Mithril.Attributes;
            feMorphology: Mithril.Attributes;
            feOffset: Mithril.Attributes;
            fePointLight: Mithril.Attributes;
            feSpecularLighting: Mithril.Attributes;
            feSpotLight: Mithril.Attributes;
            feTile: Mithril.Attributes;
            feTurbulence: Mithril.Attributes;
            filter: Mithril.Attributes;
            foreignObject: Mithril.Attributes;
            g: Mithril.Attributes;
            image: Mithril.Attributes;
            line: Mithril.Attributes;
            linearGradient: Mithril.Attributes;
            marker: Mithril.Attributes;
            mask: Mithril.Attributes;
            metadata: Mithril.Attributes;
            mpath: Mithril.Attributes;
            path: Mithril.Attributes;
            pattern: Mithril.Attributes;
            polygon: Mithril.Attributes;
            polyline: Mithril.Attributes;
            radialGradient: Mithril.Attributes;
            rect: Mithril.Attributes;
            stop: Mithril.Attributes;
            switch: Mithril.Attributes;
            symbol: Mithril.Attributes;
            text: Mithril.Attributes;
            textPath: Mithril.Attributes;
            tspan: Mithril.Attributes;
            use: Mithril.Attributes;
            view: Mithril.Attributes;

            // Special Mithril types
            "[": Mithril.Attributes;
        }
    }
}

declare const Mithril: Mithril.Static;
export = Mithril;