// This file is auto-generated by @hey-api/openapi-ts

import { getAuthToken } from "../core/auth.gen";
import type { QuerySerializer, QuerySerializerOptions } from "../core/bodySerializer.gen";
import { jsonBodySerializer } from "../core/bodySerializer.gen";
import { serializeArrayParam, serializeObjectParam, serializePrimitiveParam } from "../core/pathSerializer.gen";
import type { Client, ClientOptions, Config, RequestOptions } from "./types.gen";

interface PathSerializer {
	path: Record<string, unknown>;
	url: string;
}

const PATH_PARAM_RE = /\{[^{}]+\}/g;

type ArrayStyle = "form" | "spaceDelimited" | "pipeDelimited";
type MatrixStyle = "label" | "matrix" | "simple";
type ArraySeparatorStyle = ArrayStyle | MatrixStyle;

const defaultPathSerializer = ({ path, url: _url }: PathSerializer) => {
	let url = _url;
	const matches = _url.match(PATH_PARAM_RE);
	if (matches) {
		for (const match of matches) {
			let explode = false;
			let name = match.substring(1, match.length - 1);
			let style: ArraySeparatorStyle = "simple";

			if (name.endsWith("*")) {
				explode = true;
				name = name.substring(0, name.length - 1);
			}

			if (name.startsWith(".")) {
				name = name.substring(1);
				style = "label";
			} else if (name.startsWith(";")) {
				name = name.substring(1);
				style = "matrix";
			}

			const value = path[name];

			if (value === undefined || value === null) {
				continue;
			}

			if (Array.isArray(value)) {
				url = url.replace(match, serializeArrayParam({ explode, name, style, value }));
				continue;
			}

			if (typeof value === "object") {
				url = url.replace(
					match,
					serializeObjectParam({
						explode,
						name,
						style,
						value: value as Record<string, unknown>,
						valueOnly: true,
					}),
				);
				continue;
			}

			if (style === "matrix") {
				url = url.replace(
					match,
					`;${serializePrimitiveParam({
						name,
						value: value as string,
					})}`,
				);
				continue;
			}

			const replaceValue = encodeURIComponent(style === "label" ? `.${value as string}` : (value as string));
			url = url.replace(match, replaceValue);
		}
	}
	return url;
};

export const createQuerySerializer = <T = unknown>({ allowReserved, array, object }: QuerySerializerOptions = {}) => {
	const querySerializer = (queryParams: T) => {
		const search: string[] = [];
		if (queryParams && typeof queryParams === "object") {
			for (const name in queryParams) {
				const value = queryParams[name];

				if (value === undefined || value === null) {
					continue;
				}

				if (Array.isArray(value)) {
					const serializedArray = serializeArrayParam({
						allowReserved,
						explode: true,
						name,
						style: "form",
						value,
						...array,
					});
					if (serializedArray) search.push(serializedArray);
				} else if (typeof value === "object") {
					const serializedObject = serializeObjectParam({
						allowReserved,
						explode: true,
						name,
						style: "deepObject",
						value: value as Record<string, unknown>,
						...object,
					});
					if (serializedObject) search.push(serializedObject);
				} else {
					const serializedPrimitive = serializePrimitiveParam({
						allowReserved,
						name,
						value: value as string,
					});
					if (serializedPrimitive) search.push(serializedPrimitive);
				}
			}
		}
		return search.join("&");
	};
	return querySerializer;
};

/**
 * Infers parseAs value from provided Content-Type header.
 */
export const getParseAs = (contentType: string | null): Exclude<Config["parseAs"], "auto"> => {
	if (!contentType) {
		// If no Content-Type header is provided, the best we can do is return the raw response body,
		// which is effectively the same as the 'stream' option.
		return "stream";
	}

	const cleanContent = contentType.split(";")[0]?.trim();

	if (!cleanContent) {
		return;
	}

	if (cleanContent.startsWith("application/json") || cleanContent.endsWith("+json")) {
		return "json";
	}

	if (cleanContent === "multipart/form-data") {
		return "formData";
	}

	if (["application/", "audio/", "image/", "video/"].some((type) => cleanContent.startsWith(type))) {
		return "blob";
	}

	if (cleanContent.startsWith("text/")) {
		return "text";
	}

	return;
};

const checkForExistence = (
	options: Pick<RequestOptions, "auth" | "query"> & {
		headers: Headers;
	},
	name?: string,
): boolean => {
	if (!name) {
		return false;
	}
	if (options.headers.has(name) || options.query?.[name] || options.headers.get("Cookie")?.includes(`${name}=`)) {
		return true;
	}
	return false;
};

export const setAuthParams = async ({
	security,
	...options
}: Pick<Required<RequestOptions>, "security"> &
	Pick<RequestOptions, "auth" | "query"> & {
		headers: Headers;
	}) => {
	for (const auth of security) {
		if (checkForExistence(options, auth.name)) {
			continue;
		}

		const token = await getAuthToken(auth, options.auth);

		if (!token) {
			continue;
		}

		const name = auth.name ?? "Authorization";

		switch (auth.in) {
			case "query":
				if (!options.query) {
					options.query = {};
				}
				options.query[name] = token;
				break;
			case "cookie":
				options.headers.append("Cookie", `${name}=${token}`);
				break;
			case "header":
			default:
				options.headers.set(name, token);
				break;
		}
	}
};

export const buildUrl: Client["buildUrl"] = (options) => {
	const url = getUrl({
		baseUrl: options.baseUrl as string,
		path: options.path,
		query: options.query,
		querySerializer:
			typeof options.querySerializer === "function"
				? options.querySerializer
				: createQuerySerializer(options.querySerializer),
		url: options.url,
	});
	return url;
};

export const getUrl = ({
	baseUrl,
	path,
	query,
	querySerializer,
	url: _url,
}: {
	baseUrl?: string;
	path?: Record<string, unknown>;
	query?: Record<string, unknown>;
	querySerializer: QuerySerializer;
	url: string;
}) => {
	const pathUrl = _url.startsWith("/") ? _url : `/${_url}`;
	let url = (baseUrl ?? "") + pathUrl;
	if (path) {
		url = defaultPathSerializer({ path, url });
	}
	let search = query ? querySerializer(query) : "";
	if (search.startsWith("?")) {
		search = search.substring(1);
	}
	if (search) {
		url += `?${search}`;
	}
	return url;
};

export const mergeConfigs = (a: Config, b: Config): Config => {
	const config = { ...a, ...b };
	if (config.baseUrl?.endsWith("/")) {
		config.baseUrl = config.baseUrl.substring(0, config.baseUrl.length - 1);
	}
	config.headers = mergeHeaders(a.headers, b.headers);
	return config;
};

export const mergeHeaders = (...headers: Array<Required<Config>["headers"] | undefined>): Headers => {
	const mergedHeaders = new Headers();
	for (const header of headers) {
		if (!header || typeof header !== "object") {
			continue;
		}

		const iterator = header instanceof Headers ? header.entries() : Object.entries(header);

		for (const [key, value] of iterator) {
			if (value === null) {
				mergedHeaders.delete(key);
			} else if (Array.isArray(value)) {
				for (const v of value) {
					mergedHeaders.append(key, v as string);
				}
			} else if (value !== undefined) {
				// assume object headers are meant to be JSON stringified, i.e. their
				// content value in OpenAPI specification is 'application/json'
				mergedHeaders.set(key, typeof value === "object" ? JSON.stringify(value) : (value as string));
			}
		}
	}
	return mergedHeaders;
};

type ErrInterceptor<Err, Res, Req, Options> = (
	error: Err,
	response: Res,
	request: Req,
	options: Options,
) => Err | Promise<Err>;

type ReqInterceptor<Req, Options> = (request: Req, options: Options) => Req | Promise<Req>;

type ResInterceptor<Res, Req, Options> = (response: Res, request: Req, options: Options) => Res | Promise<Res>;

class Interceptors<Interceptor> {
	_fns: (Interceptor | null)[];

	constructor() {
		this._fns = [];
	}

	clear() {
		this._fns = [];
	}

	getInterceptorIndex(id: number | Interceptor): number {
		if (typeof id === "number") {
			return this._fns[id] ? id : -1;
		} else {
			return this._fns.indexOf(id);
		}
	}
	exists(id: number | Interceptor) {
		const index = this.getInterceptorIndex(id);
		return !!this._fns[index];
	}

	eject(id: number | Interceptor) {
		const index = this.getInterceptorIndex(id);
		if (this._fns[index]) {
			this._fns[index] = null;
		}
	}

	update(id: number | Interceptor, fn: Interceptor) {
		const index = this.getInterceptorIndex(id);
		if (this._fns[index]) {
			this._fns[index] = fn;
			return id;
		} else {
			return false;
		}
	}

	use(fn: Interceptor) {
		this._fns = [...this._fns, fn];
		return this._fns.length - 1;
	}
}

// `createInterceptors()` response, meant for external use as it does not
// expose internals
export interface Middleware<Req, Res, Err, Options> {
	error: Pick<Interceptors<ErrInterceptor<Err, Res, Req, Options>>, "eject" | "use">;
	request: Pick<Interceptors<ReqInterceptor<Req, Options>>, "eject" | "use">;
	response: Pick<Interceptors<ResInterceptor<Res, Req, Options>>, "eject" | "use">;
}

// do not add `Middleware` as return type so we can use _fns internally
export const createInterceptors = <Req, Res, Err, Options>() => ({
	error: new Interceptors<ErrInterceptor<Err, Res, Req, Options>>(),
	request: new Interceptors<ReqInterceptor<Req, Options>>(),
	response: new Interceptors<ResInterceptor<Res, Req, Options>>(),
});

const defaultQuerySerializer = createQuerySerializer({
	allowReserved: false,
	array: {
		explode: true,
		style: "form",
	},
	object: {
		explode: true,
		style: "deepObject",
	},
});

const defaultHeaders = {
	"Content-Type": "application/json",
};

export const createConfig = <T extends ClientOptions = ClientOptions>(
	override: Config<Omit<ClientOptions, keyof T> & T> = {},
): Config<Omit<ClientOptions, keyof T> & T> => ({
	...jsonBodySerializer,
	headers: defaultHeaders,
	parseAs: "auto",
	querySerializer: defaultQuerySerializer,
	...override,
});