import { AxiosRequestConfig } from 'axios';
import * as fs from 'fs';
import { enumsMap, typeMap } from "./";
import { Headers } from "form-data";

export interface RequestDetailedFile {
  value: Buffer;
  options: {
    filename: string;
    contentType: string;
    header?: string | Headers;
    knownLength?: number;
    filepath?: string;
  };
}

interface AttributeType {
  name: string;
  baseName: string;
  type: string;
}

export interface AttributeTypeMap extends Array<AttributeType>{}

export type RequestFile = fs.ReadStream | RequestDetailedFile;


/* tslint:disable:no-unused-variable */
let primitives = [
                    "string",
                    "boolean",
                    "double",
                    "integer",
                    "long",
                    "float",
                    "number",
                    "any"
                 ];

export class ObjectSerializer {
    public static findCorrectType(data: any, expectedType: string) {
        if (data == undefined) {
            return expectedType;
        } else if (primitives.indexOf(expectedType.toLowerCase()) !== -1) {
            return expectedType;
        } else if (expectedType === "Date") {
            return expectedType;
        } else {
            if (enumsMap[expectedType]) {
                return expectedType;
            }

            if (!typeMap[expectedType]) {
                return expectedType; // w/e we don't know the type
            }

            // Check the discriminator
            let discriminatorProperty = typeMap[expectedType].discriminator;
            let discriminatorValue = data[discriminatorProperty];

            if (typeMap[expectedType].hasOwnProperty('discriminatorClassName')) {
              let discriminatorClass = typeMap[expectedType].discriminatorClassName(
                discriminatorValue
              );

              if (discriminatorClass) {
                return discriminatorClass;
              }
            }

            if (discriminatorProperty == null) {
                return expectedType; // the type does not have a discriminator. use it.
            } else {
                if (data[discriminatorProperty]) {
                    var discriminatorType = data[discriminatorProperty];
                    if(typeMap[discriminatorType]){
                        return discriminatorType; // use the type given in the discriminator
                    } else {
                        return expectedType; // discriminator did not map to a type
                    }
                } else {
                    return expectedType; // discriminator was not present (or an empty string)
                }
            }
        }
    }

    public static serialize(data: any, type: string) {
        if (data == undefined) {
            return data;
        } else if (primitives.indexOf(type.toLowerCase()) !== -1) {
            return data;
        } else if (type.lastIndexOf("Array<", 0) === 0) { // string.startsWith pre es6
            let subType: string = type.replace("Array<", ""); // Array<Type> => Type>
            subType = subType.substring(0, subType.length - 1); // Type> => Type
            let transformedData: any[] = [];
            for (let index = 0; index < data.length; index++) {
                let datum = data[index];
                transformedData.push(ObjectSerializer.serialize(datum, subType));
            }
            return transformedData;
        } else if (type === "Date") {
            return data.toISOString();
        } else {
            if (enumsMap[type]) {
                return data;
            }
            if (!typeMap[type]) { // in case we dont know the type
                return data;
            }

            // Get the actual type of this object
            type = this.findCorrectType(data, type);

            // get the map for the correct type.
            let attributeTypes = typeMap[type].getAttributeTypeMap();
            let instance: {[index: string]: any} = {};
            for (let index = 0; index < attributeTypes.length; index++) {
                let attributeType = attributeTypes[index];
                let value = ObjectSerializer.serialize(data[attributeType.name], attributeType.type);

                // Only add property if not null
                if (value !== undefined) {
                  instance[attributeType.baseName] = value;
                }
            }
            return instance;
        }
    }

    public static deserialize(data: any, type: string) {
        // polymorphism may change the actual type.
        type = ObjectSerializer.findCorrectType(data, type);
        if (data == undefined) {
            return data;
        } else if (primitives.indexOf(type.toLowerCase()) !== -1) {
            return data;
        } else if (type.lastIndexOf("Array<", 0) === 0) { // string.startsWith pre es6
            let subType: string = type.replace("Array<", ""); // Array<Type> => Type>
            subType = subType.substring(0, subType.length - 1); // Type> => Type
            let transformedData: any[] = [];
            for (let index = 0; index < data.length; index++) {
                let datum = data[index];
                transformedData.push(ObjectSerializer.deserialize(datum, subType));
            }
            return transformedData;
        } else if (type === "Date") {
            return new Date(data);
        } else {
            if (enumsMap[type]) {// is Enum
                return data;
            }

            if (!typeMap[type]) { // dont know the type
                return data;
            }
            let instance = new typeMap[type]();
            let attributeTypes = typeMap[type].getAttributeTypeMap();
            for (let index = 0; index < attributeTypes.length; index++) {
                let attributeType = attributeTypes[index];
                const propertyKey = data[attributeType.baseName] !== undefined
                    ? attributeType.baseName
                    : attributeType.name;

                instance[attributeType.name] = ObjectSerializer.deserialize(data[propertyKey], attributeType.type);
            }
            return instance;
        }
    }
}

export interface Authentication {
    /**
    * Apply authentication settings to header and query params.
    */
    applyToRequest(requestOptions: AxiosRequestConfig): Promise<void> | void;
}

export class HttpBasicAuth implements Authentication {
    public username: string = '';
    public password: string = '';

    applyToRequest(requestOptions: AxiosRequestConfig): void {
        requestOptions.auth = {
            username: this.username, password: this.password
        }
    }
}

export class HttpBearerAuth implements Authentication {
    public accessToken: string | (() => string) = '';

    applyToRequest(requestOptions: AxiosRequestConfig): void {
        if (requestOptions && requestOptions.headers) {
            const accessToken = typeof this.accessToken === 'function'
                            ? this.accessToken()
                            : this.accessToken;
            requestOptions.headers["Authorization"] = "Bearer " + accessToken;
        }
    }
}

export class ApiKeyAuth implements Authentication {
    public apiKey: string = '';

    constructor(private location: string, private paramName: string) {
    }

    applyToRequest(requestOptions: AxiosRequestConfig): void {
        if (this.location == "query") {
            (<any>requestOptions.params)[this.paramName] = this.apiKey;
        } else if (this.location == "header" && requestOptions && requestOptions.headers) {
            requestOptions.headers[this.paramName] = this.apiKey;
        } else if (this.location == 'cookie' && requestOptions && requestOptions.headers) {
            if (requestOptions.headers['Cookie']) {
                requestOptions.headers['Cookie'] += '; ' + this.paramName + '=' + encodeURIComponent(this.apiKey);
            }
            else {
                requestOptions.headers['Cookie'] = this.paramName + '=' + encodeURIComponent(this.apiKey);
            }
        }
    }
}

export class OAuth implements Authentication {
    public accessToken: string = '';

    applyToRequest(requestOptions: AxiosRequestConfig): void {
        if (requestOptions && requestOptions.headers) {
            requestOptions.headers["Authorization"] = "Bearer " + this.accessToken;
        }
    }
}

export class VoidAuth implements Authentication {
    public username: string = '';
    public password: string = '';

    applyToRequest(_: AxiosRequestConfig): void {
        // Do nothing
    }
}

export type Interceptor = (requestOptions: AxiosRequestConfig) => (Promise<void> | void);