import { fetch } from "@tauri-apps/plugin-http";

import {
    type InferOutput,
    array,
    literal,
    null_,
    nullable,
    pipe,
    safeParse,
    strictObject,
    string,
    transform,
    union,
    uuid,
} from "valibot";

type BaseRequestParams = Partial<{
    path: string;
    body: RequestInit["body"];
    method: "GET" | "POST" | "DELETE";
}>;

// export const base = "https://haystack.johncosta.tech";
export const base = "http://localhost:3040";

const getBaseRequest = ({ path, body, method }: BaseRequestParams): Request => {
    return new Request(`${base}/${path}`, {
        body,
        method,
    });
};

const getBaseAuthorizedRequest = ({
    path,
    body,
    method,
}: BaseRequestParams): Request => {
    return new Request(`${base}/${path}`, {
        headers: {
            Authorization: `Bearer ${localStorage.getItem("access")?.toString()}`,
        },
        body,
        method,
    });
};
const sendImageResponseValidator = strictObject({
    ID: pipe(string(), uuid()),
    ImageID: pipe(string(), uuid()),
    UserID: pipe(string(), uuid()),
    Status: string(),
});

export const sendImageFile = async (
    imageName: string,
    file: File,
): Promise<InferOutput<typeof sendImageResponseValidator>> => {
    const request = getBaseAuthorizedRequest({
        path: `images/${imageName}`,
        body: file,
        method: "POST",
    });

    request.headers.set("Content-Type", "application/oclet-stream");

    const res = await fetch(request).then((res) => res.json());
    const parsedRes = safeParse(sendImageResponseValidator, res);

    if (!parsedRes.success) {
        console.log(parsedRes.issues)
        throw new Error(JSON.stringify(parsedRes.issues));
    }

    return parsedRes.output;
};

export const deleteImage = async (
    imageID: string
): Promise<void> => {
    const request = getBaseAuthorizedRequest({
        path: `images/${imageID}`,
        method: "DELETE",
    });

    await fetch(request);
}

export const deleteImageFromStack = async (listID: string, imageID: string): Promise<void> => {
    const request = getBaseAuthorizedRequest({
        path: `stacks/${listID}/${imageID}`,
        method: "DELETE",
    });

    await fetch(request);
}

export class ImageLimitReached extends Error {
    constructor() {
        super();
    }
}

export const sendImage = async (
    imageName: string,
    base64Image: string,
): Promise<InferOutput<typeof sendImageResponseValidator>> => {
    const request = getBaseAuthorizedRequest({
        path: `images/${imageName}`,
        body: base64Image,
        method: "POST",
    });

    request.headers.set("Content-Type", "application/base64");

    const rawRes = await fetch(request);
    if (!rawRes.ok && rawRes.status == 429) {
        throw new ImageLimitReached()
    }

    const res = await rawRes.json();

    const parsedRes = safeParse(sendImageResponseValidator, res);
    if (!parsedRes.success) {
        console.log(parsedRes.issues)
        throw new Error(JSON.stringify(parsedRes.issues));
    }

    return parsedRes.output;
};

const imageMetaValidator = strictObject({
    ID: pipe(string(), uuid()),
    ImageName: string(),
    Description: string(),
    Image: null_(),
});

const userImageValidator = strictObject({
    ID: pipe(string(), uuid()),
    CreatedAt: pipe(string()),
    ImageID: pipe(string(), uuid()),
    UserID: pipe(string(), uuid()),
    Image: strictObject({
        ...imageMetaValidator.entries,
        ImageLists: pipe(nullable(array(
            strictObject({
                ID: pipe(string(), uuid()),
                ImageID: pipe(string(), uuid()),
                ListID: pipe(string(), uuid()),
            }),
        )), transform(l => l ?? [])),
    }),
});

const userProcessingImageValidator = strictObject({
    ID: pipe(string(), uuid()),
    ImageID: pipe(string(), uuid()),
    UserID: pipe(string(), uuid()),
    Image: imageMetaValidator,
    Status: union([
        literal("not-started"),
        literal("in-progress"),
        literal("complete"),
    ]),
});

const listValidator = strictObject({
    ID: pipe(string(), uuid()),
    UserID: pipe(string(), uuid()),
    CreatedAt: pipe(string()),
    Name: string(),
    Description: nullable(string()),

    Images: pipe(
        nullable(
            array(
                strictObject({
                    ID: pipe(string(), uuid()),
                    ImageID: pipe(string(), uuid()),
                    ListID: pipe(string(), uuid()),
                    Items: array(
                        strictObject({
                            ID: pipe(string(), uuid()),
                            ImageID: pipe(string(), uuid()),
                            SchemaItemID: pipe(string(), uuid()),
                            Value: string(),
                        }),
                    ),
                }),
            ),
        ),
        transform((n) => n ?? []),
    ),

    Schema: strictObject({
        ID: pipe(string(), uuid()),
        ListID: pipe(string(), uuid()),
        SchemaItems: array(
            strictObject({
                ID: pipe(string(), uuid()),
                SchemaID: pipe(string(), uuid()),
                Item: string(),
                Value: nullable(string()),
                Description: string(),
            }),
        ),
    }),
});

export type List = InferOutput<typeof listValidator>;

const imageRequestValidator = strictObject({
    userImages: array(userImageValidator),
    processingImages: array(userProcessingImageValidator),
    lists: array(listValidator),
});

export type JustTheImageWhatAreTheseNames = InferOutput<
    typeof userImageValidator
>[];

export const getUserImages = async (): Promise<
    InferOutput<typeof imageRequestValidator>
> => {
    const request = getBaseAuthorizedRequest({ path: "images" });

    const res = await fetch(request).then((res) => res.json());

    console.log("Backend response: ", res);

    const parsedRes = safeParse(imageRequestValidator, res);
    if (!parsedRes.success) {
        console.log(parsedRes.issues)
        throw new Error(JSON.stringify(parsedRes.issues));
    }

    return parsedRes.output;
};

export const postLogin = async (email: string): Promise<void> => {
    const request = getBaseRequest({
        path: "auth/login",
        body: JSON.stringify({ email }),
        method: "POST",
    });

    await fetch(request);
};

const codeValidator = strictObject({
    access: string(),
    refresh: string(),
});

export const postCode = async (
    email: string,
    code: string,
): Promise<InferOutput<typeof codeValidator>> => {
    const request = getBaseRequest({
        path: "auth/code",
        body: JSON.stringify({ email, code }),
        method: "POST",
    });

    const res = await fetch(request).then((res) => res.json());

    const parsedRes = safeParse(codeValidator, res);
    if (!parsedRes.success) {
        console.log(parsedRes.issues)
        throw new Error(JSON.stringify(parsedRes.issues));
    }

    return parsedRes.output;
};

export class ReachedListLimit extends Error {
    constructor() {
        super();
    }
}

export const createList = async (
    title: string,
    description: string,
): Promise<void> => {
    const request = getBaseAuthorizedRequest({
        path: "stacks",
        method: "POST",
        body: JSON.stringify({ title, description }),
    });

    request.headers.set("Content-Type", "application/json");

    const res = await fetch(request);
    if (!res.ok && res.status == 429) {
        throw new ReachedListLimit();
    }
};