import {
    type LGraphNode,
    type IWidget,
    type INodeInputSlot,
    type LGraph,
    type SubgraphNode,
} from "@comfyorg/litegraph";
import type { ComfyApp } from "@comfyorg/comfyui-frontend-types";

// @ts-ignore
const app = window.comfyAPI.app.app;

interface DTServerNode extends LGraphNode {
    isDtServerNode?: boolean;
    getServer: () => { server: string; port: number | string; useTls: boolean };
    updateModels?: (models: any, versions?: any) => void;
    findServerNodes?: () => DTServerNode[];
    getModelVersion?: () => string;
}

interface DTModelNode extends LGraphNode {
    isDtServerNode?: boolean;
    updateModels?: (models: any, versions?: any) => void;
    findServerNodes?: () => DTServerNode[];
    saveSelectedModels?: () => void;
}

class ModelService {
    #updateNodesPromise: Promise<void> | null = null;

    constructor() {}

    async updateNodes() {
        // since many nodes may be configured at once, we will batch calls to updateNodes
        if (app.configuringGraph || !app.graph) return;
        if (!this.#updateNodesPromise) {
            this.#updateNodesPromise = new Promise((res) => {
                setTimeout(() => {
                    this.#updateNodesPromise = null;
                    this.#updateNodes().then(() => res());
                }, 10);
            });
        }

        return this.#updateNodesPromise;
    }

    async #updateNodes() {
        const dtModelNodes = getNodesRecursive(app.graph).filter(
            (n: any) => n.isDtServerNode !== undefined
        ) as DTModelNode[];
        const graphServerNodes = dtModelNodes.filter(
            (n) => n.isDtServerNode
        ) as DTServerNode[];
        console.log(dtModelNodes, graphServerNodes);
        if (!graphServerNodes.length) return;

        const nodesUpdated = new Map(dtModelNodes.map((n) => [n, false]));
        /** @type {Map<string, ModelInfo | undefined>} */
        const serverModels = new Map<string, ModelInfo | undefined>();

        for (const sn of graphServerNodes) {
            // get fresh models list for the server
            const { server, port, useTls } = sn.getServer();
            if (!server || !port || useTls === undefined) continue;
            const key = modelInfoStoreKey(server, port, useTls);
            if (!serverModels.has(key)) {
                serverModels.set(key, await getModels(server, port, useTls));
            }

            // update server node's models
            const models = serverModels.get(key);
            sn.updateModels?.(models);
            nodesUpdated.set(sn, true);
        }

        for (const node of dtModelNodes) {
            if (nodesUpdated.get(node)) continue;

            // determine the server(s) and version(s) this node is connected to
            /** @type {import('@comfyorg/litegraph').LGraphNode[]?} */
            const serverNodes = node?.findServerNodes?.();
            if (!serverNodes || !serverNodes.length) continue;

            let mergedModels = {};
            for (const sn of serverNodes) {
                const { server, port, useTls } = sn.getServer();
                if (!server || !port || useTls === undefined) continue;
                const models = serverModels.get(
                    modelInfoStoreKey(server, port, useTls)
                );
                mergedModels = mergeModels(mergedModels, models);
            }
            const versions = serverNodes
                .map((sn) => sn?.getModelVersion?.())
                .filter((v) => v);

            node.updateModels?.(mergedModels, versions);
            nodesUpdated.set(node, true);
        }

        // these nodes are not connected to a sampler node
        // if there's a single server, update them with those models
        const models =
            serverModels.size === 1 ? serverModels.values().next().value : null;
        for (const node of nodesUpdated.keys()) {
            if (nodesUpdated.get(node) === false) {
                nodesUpdated.set(node, true);
                node.updateModels?.(models);
            }
        }
    }
}

function getNodesRecursive(graph: LGraph): LGraphNode[] {
    const nodes = [];
    for (const node of graph.nodes) {
        if ("subgraph" in node) {
            nodes.push(...getNodesRecursive(node.subgraph));
        } else {
            nodes.push(node);
        }
    }
    return nodes;
}

export const modelService = new ModelService();

/**
 * @param node {LGraphNode}
 * @param inputName {string}
 * @param inputData {["DT_MODEL", {model_type: string}]}
 */
export function DtModelTypeHandler(
    node: DTModelNode,
    inputName: string,
    inputData: any,
    app: ComfyApp
) {
    const widget = node.addWidget(
        "combo",
        inputName,
        "(None selected)",
        /** @type WidgetCallback<IWidget<any, any>> */
        ((value: any, graph: any, node: any) => {
            node.saveSelectedModels?.();
            modelService.updateNodes();
        }) as any,
        {
            values: ["(None selected)"],
            modelType: inputData[1].model_type,
        } as any
    );

    return { widget };
}

/**
 * @param {string} server
 * @param {number | string} port
 */
export async function getFiles(
    server: string,
    port: number | string,
    useTls: boolean
) {
    const body = new FormData();
    body.append("server", server);
    body.append("port", String(port));
    body.append("use_tls", String(useTls));

    const api = window.comfyAPI.api.api;
    const filesInfoResponse = await api.fetchApi(`/dt_grpc/files_info`, {
        method: "POST",
        body,
    });

    return filesInfoResponse;
}

let combinedIncludes: [boolean | null, boolean | null] = [null, null];
let combinedBridgeModels: ModelInfo | null = null;
async function getBridgeModels() {
    const includeCommunity = app.extensionManager.setting.get(
        "drawthings.bridge_mode.community"
    );
    const includeUncurated = app.extensionManager.setting.get(
        "drawthings.bridge_mode.uncurated"
    );
    if (
        combinedBridgeModels &&
        combinedIncludes[0] === includeCommunity &&
        combinedIncludes[1] === includeUncurated
    )
        return combinedBridgeModels;

    const api = window.comfyAPI.api.api;
    const filesResponse = await api.fetchApi("/dt_grpc/bridge_models");
    const files = await filesResponse.json();

    const filterFn = includeCommunity
        ? (m: any) => files.includes(m.file)
        : (m: any) => files.includes(m.file) && m.official;

    // @ts-ignore
    const bridgeModeModelsModules = await import("./models/index.esm.js");
    const bridgeModeModels =
        await bridgeModeModelsModules.getBridgeModeModels();

    const models = bridgeModeModels.models;
    const uncurated = bridgeModeModels.uncurated;
    const controlNets = bridgeModeModels.controlNets;
    const loras = bridgeModeModels.loras;
    const textualInversions = bridgeModeModels.textualInversions;
    const upscalers = bridgeModeModels.upscalers;

    combinedBridgeModels = {
        models: [...models, ...(includeUncurated ? uncurated : [])].filter(
            filterFn
        ),
        controlNets: controlNets.filter(filterFn),
        loras: loras.filter(filterFn),
        textualInversions: textualInversions.filter(filterFn),
        upscalers: upscalers.filter(filterFn),
    };
    combinedIncludes = [includeCommunity, includeUncurated];

    return combinedBridgeModels;
}

/* @typedef {{ models: any[], controlNets: any[], loras: any[], upscalers: any[]}} ModelInfo */

export interface Model {
    name: string;
    file: string;
    version?: string;
}

export interface ModelInfo {
    models: Model[];
    controlNets: Model[];
    loras: Model[];
    textualInversions: Model[];
    upscalers: Model[];
    [key: string]: Model[]; // Allow dynamic keys for mergeModels
}

/** @type Map<string, ModelInfo> */
const modelInfoStore = new Map<string, ModelInfo | null>();
/** @type Map<string, Promise<void>> */
const modelInfoRequests = new Map<string, Promise<void>>();
const modelInfoStoreKey = (
    server?: string,
    port?: number | string,
    useTls?: boolean
) => `${server}:${port}${useTls ? ":tls" : ""}`;

// yes this is kind of hacky :)
const failedConnectionOptions = [
    "Couldn't connect to server",
    "Check server and click to retry",
].map((c, i) => ({
    name: c,
    file: "",
    version: "fail",
    order: i + 1,
})) as any[];

const notConnectedOptions = [
    "Not connected to sampler node",
    "Connect to a sampler node to list available models",
].map((c) => ({
    name: c,
    file: "",
    version: "fail",
}));

async function getModels(
    server: string,
    port: number | string,
    useTls: boolean
) {
    if (!server || !port || useTls === undefined) return;
    if (app.extensionManager.setting.get("drawthings.bridge_mode.enabled"))
        return getBridgeModels();

    const key = modelInfoStoreKey(server, port, useTls);
    if (modelInfoRequests.has(key)) {
        const request = modelInfoRequests.get(key);
        await request;
    } else {
        const promise = new Promise<void>((resolve) => {
            getFiles(server, port, useTls).then(async (response) => {
                if (!response.ok) {
                    modelInfoStore.set(key, null);
                } else {
                    const data = await response.json();
                    testHack(data);
                    modelInfoStore.set(key, data);
                }
                modelInfoRequests.delete(key);
                resolve();
            });
        });
        modelInfoRequests.set(key, promise);
        await promise;
    }

    return modelInfoStore.get(key) || undefined;
}

const failedConnectionInfo: ModelInfo = {
    models: failedConnectionOptions,
    controlNets: notConnectedOptions,
    loras: notConnectedOptions,
    upscalers: notConnectedOptions,
    textualInversions: notConnectedOptions,
};

modelInfoStore.set(modelInfoStoreKey(), failedConnectionInfo);

/** @param node {LGraphNode} */
function getInputNodes(node: LGraphNode) {
    return node.inputs
        .map((input, i) => [i, input] as [number, INodeInputSlot])
        .filter(([index, input]) => input.link !== null)
        .map(([index, input]) => node.getInputNode(Number(index)));
}

export function getMenuItem(model: Model, disabled: boolean) {
    return {
        value: model,
        content:
            model.version && model.version !== "fail"
                ? `${model.name} (${getVersionAbbrev(model.version)})`
                : model.name,
        toString() {
            return model.name;
        },
        // has_submenu?: boolean;
        disabled,
        // submenu?: IContextMenuSubmenu<TValue>;
        // property?: string;
        // type?: string;
        // slot?: IFoundSlot;
        // callback(this: ContextMenuDivElement<TValue>, value?: TCallbackValue, options?: unknown, event?: MouseEvent, previous_menu?: ContextMenu<TValue>, extra?: TExtra) {
        callback(...args: any[]) {
            return false;
        },
    };
}

/**
 *
 * @param {ModelInfo?} modelInfoA
 * @param {ModelInfo?} modelInfoB
 */
function mergeModels(
    modelInfoA: ModelInfo | undefined | null | {},
    modelInfoB: ModelInfo | undefined | null
) {
    /** @type {ModelInfo} */
    const merged: ModelInfo = {} as any;
    /** @type {Set<keyof ModelInfo>} */
    const types = new Set(
        Object.keys(modelInfoA ?? {}).concat(Object.keys(modelInfoB ?? {}))
    );
    for (const type of types.values()) {
        (merged as any)[type] = (modelInfoA as any)[type] ?? [];
        const modelFiles = (merged as any)[type].map((m: any) => m.file);
        const extras: any[] = ((modelInfoB as any)[type] ?? []).filter(
            (m: any) => !modelFiles.includes(m.file)
        );
        (merged as any)[type] = (merged as any)[type].concat(extras);
    }
    return merged;
}

const versionNames: Record<string, string> = {
    v1: "SD",
    v2: "SD2",
    "kandinsky2.1": "Kan",
    "sdxl_base_v0.9": "SDXL",
    "sdxl_refiner_v0.9": "SDXL",
    ssd_1b: "SSD",
    svd_i2v: "SVD",
    "wurstchen_v3.0_stage_c": "Wur",
    "wurstchen_v3.0_stage_b": "Wur",
    sd3: "SD3",
    pixart: "Pix",
    auraflow: "AF",
    flux1: "F1",
    sd3_large: "SD3L",
    hunyuan_video: "Hun",
    "wan_v2.1_1.3b": "Wan",
    "wan_v2.1_14b": "Wan",
    hidream_i1: "HiD",
    qwen_image: "Qwen",
};

function getVersionAbbrev(version: string) {
    return versionNames[version] ?? version;
}

function testHack(models: ModelInfo) {
    // horrible hacky test assist
    try {
        if (
            new URL(document.location.href).searchParams.has("dtgrpctesthack")
        ) {
            if (Array.isArray(models?.models)) {
                models.models.push({
                    file: "fake_qwen.ckpt",
                    version: "qwen_image",
                    name: "Qwen Image Fake",
                });
                models.models.push({
                    file: "fake_wan.ckpt",
                    version: "wan_v2.1_14b",
                    name: "Wan Fake",
                });
            }
        }
    } catch {}
}