import {Account, Course, Exercise, ExerciseQuestion} from "./eduapi"
import {Session} from "./requests";
import {Cookie} from "./cookie";

/**
 * 客户端类，其method实现客户端各种操作，将接口Promise化，
 * 要在此处实现网络数据及cookie的缓存
 */

export class Client{
    constructor({session}={}){
        if(!session) {
            this.session = new Session();
        }else {
            this.session = session;
        }
        this.load_cached_cookies();
        this.current_user = {};
        this.callback={require_login: ()=>{}};
        this.load_current_user();
    }
    load_current_user(){
        var value = wx.getStorageSync('current_user');
        if(value) {
            this.current_user = value;
            console.log("read current_user from storage");
            console.log(this.current_user);
        }
    }
    save_current_user(){
        console.log("save current user to storage");
        console.log(this.current_user);
        wx.setStorageSync("current_user", this.current_user);
    }
    clear_current_user(){
        wx.setStorageSync("current_user", {});
    }
    load_cached_cookies(){
        try {
            var value = wx.getStorageSync('_educoder_session');
            if (value) {
                this.session.set_cookie(new Cookie(value))
            }
            var value = wx.getStorageSync("autologin_trustie");
            if (value) {
                this.session.set_cookie(new Cookie(value));
            }
            console.log("read cookies from wx.Storage:");
            console.log(this.session.cookies);
        } catch (e) {
            // Do something when catch error
            console.error("there is not cached cookie")
            console.error(e);
        }
    }
    save_cookies(){
        for(var cookie of Object.values(this.session.cookies)){
            console.log("client save new cookie");
            console.log(cookie);
            cookie.save();
        }
    }
    onRequireLogin(cd){
      this.callback.require_login = cd;
    }
    require_login(){
        wx.redirectTo({
            url: "../pages/login/login"
        });
        wx.showToast({
            title:"请先登陆",
            icon: "none",
            duration: 4000
        });
    }

    login({login, password, autologin, success, fail, complete}){
        return new Promise((resolve, reject) => {
            Account.login({
                session: this.session, login: login, password: password, autologin: autologin,
                fail: error => {
                    if(typeof fail == "function") {
                        fail(error);
                    }
                    reject(error);
                },
                complete: complete,
                success: res => {
                    this.save_cookies();
                    this.current_user = {...this.current_user, ...res.data};
                    console.log("current_user info update");
                    console.log(this.current_user);
                    this.get_user_info();
                    if (typeof success == "function") {
                        success(res);
                    }
                    resolve(res);
                }
            });
        });
    }
    logout({success, fail, complete}={}){
        return new Promise((resolve, reject) => {
            Account.logout({session: this.session,
                success: res=>{
                    if(typeof success == "function") {
                        success(res);
                    }
                    this.get_user_info();
                    resolve(res);
                }, fail: error=>{
                    if(typeof fail =="function"){
                        fail(error);
                    }
                    reject(error);
                }, complete: complete});
        })
    }
    register({login, password, code, success, fail, complete}){
        return new Promise((resolve, reject) => {
            Account.register({session: this.session, login:login, password:password, code:code,
                complete:complete,
                success: res=>{
                    this.save_cookies();
                    if(typeof success == "function"){
                        success(res);
                    }
                    resolve(res);
                },
                fail:error=>{
                    if(typeof  fail == "function") {
                        fail(error);
                    }
                    reject(error)
                }
            });
        });
    }
    get_user_info({success, fail, complete}={}){
        return new Promise((resolve, reject) => {
            Account.get_user_info({session: this.session, complete: complete,
                success: res=>{
                    this.current_user = {...this.current_user, ...res.data};
                    console.log("current_user info update");
                    console.log(this.current_user);
                    if(typeof success == "function"){
                        success(res);
                    }
                    resolve(res);
                    this.save_current_user();
                },
                fail: error=>{
                    this.callback.require_login();
                    if(typeof fail == "function"){
                        fail(error);
                    }
                    reject(error);
                }
            })
        });
    }
    get_verification_code_for_register({login, success, fail, complete}){
        return Account.get_verification_code({session: this.session, login: login, type: 1,
            fail: fail, complete: complete, success: success});
    }
    get_verification_code_for_reset_password({}){}

    search_courses({limit=20, page=1, order="all", search="", success, fail, complete}={}){
        return new Promise((resolve, reject) => {
            Course.search({session: this.session, page: page, order: order, search: search, complete: complete,
                success: res=>{
                    if(typeof success == "function"){
                        success(res);
                    }
                    resolve(res);
                },
                fail: error=>{
                    if(typeof fail == "function"){
                        fail(error);
                    }
                    reject(error);
                }
            });
        });
    }
    get_course_info({course_id, success, fail, complete}){
        return new Promise((resolve, reject) => {
            Course.get_course_info({
                session: this.session,
                course_id: course_id,
                complete: complete,
                success: res=>{
                    if(typeof success == "function"){
                        success(res);
                    }
                    resolve(res);
                },
                fail: error=>{
                    if(typeof fail == "function"){
                        fail(error);
                    }
                    reject(error);
                }
            })
        });

    }
    get_user_courses({page=1, per_page=16, success, fail, complete}={}){
        return new Promise((resolve, reject) => {
            Account.get_user_courses({
                session: this.session,
                page: page,
                per_page: per_page,
                user: this.current_user.login,
                complete: complete,
                success: res=>{
                    if(typeof success == "function"){
                        success(res);
                    }
                    resolve(res);
                },
                fail: error=>{
                    if(typeof fail == "function"){
                        fail(error);
                    }
                    reject(error);
                }
            });
        });
    }
    join_course({invite_code, professor=null,assistant_professor=null,student=null, success, fail, complete}){
        return new Promise((resolve, reject)=>{
            Course.join({session: this.session, invite_code: invite_code, professor: professor, assistant_professor: assistant_professor, student: student, complete: complete,
                success: res=>{
                    if(typeof success == "function"){
                        success(res);
                    }
                    resolve(res);
                },
                fail: error=>{
                    if(typeof fail == "function"){
                        fail(error);
                    }
                    reject(error);
                }
            })
        });
    }
    get_course_files({course_id, page_size=15, page=1,search="",sort=0, sort_type="created_on", success, fail, complete}){
        return new Promise((resolve, reject) => {
            Course.get_files({
                session: this.session,course_id:course_id, page_size: page_size, page:page, search: search, sort: sort, sort_type: sort_type, complete: complete,
                success: res=>{
                    if(typeof success == "function"){
                        success(res);
                    };
                    resolve(res);
                },
                fail: error=>{
                    if(typeof success == "function"){
                        fail(error);
                    }
                    reject(error);
                }
            });
        });
    }
    get_course_students({course_id, order=1,sort="asc",page=1, limit=20, course_group_id="", success, fail, complete}){
        return new Promise((resolve, reject) => {
           Course.get_students({
                session: this.session,
                course_id: course_id,
                order: order,
                sort: sort,
                page: page,
                limit: limit,
                course_group_id: course_group_id,
                complete: complete,
                success: res=>{
                    if(typeof success == "function"){
                        success(res);
                    };
                    resolve(res);
                },
                fail: error=>{
                    if(typeof success == "function"){
                        fail(error);
                    }
                    reject(error);
                }
            })
        })
    }
    search_exercises({course_id, type="", page=1, limit=15, success, fail, complete}){
        return new Promise((resolve, reject) => {
            Exercise.search({
                session: this.session,
                course_id: course_id,
                type: type,
                page: page,
                limit: limit,
                complete: complete,
                success: res=>{
                    if(typeof success == "function"){
                        success(res);
                    };
                    resolve(res);
                },
                fail: error=>{
                    if(typeof fail == "function"){
                        fail(error);
                    }
                    reject(error);
                }
            })
        });
    }
    start_answer_exercise({exercise_id, success, fail, complete}){
        return new Promise((resolve, reject) => {
            Exercise.start_answer({
                session: this.session,
                exercise_id: exercise_id,
                login: this.current_user.login,
                complete: complete,
                success: res=>{
                    if(typeof success == "function"){
                        success(res);
                    };
                    resolve(res);
                },
                fail: error=>{
                    if(typeof fail == "function"){
                        fail(error);
                    }
                    reject(error);
                }
            })
        });
    }
    answer_exercise_question({question_id, exercise_choice_id,answer_text ,success, fail, complete}){
        return new Promise((resolve, reject) =>{
            ExerciseQuestion.answer({
                session: this.session,
                question_id: question_id,
                answer_text: answer_text,
                exercise_choice_id: exercise_choice_id,
                complete: complete,
                success: res=>{
                    if(typeof success == "function"){
                        success(res);
                    };
                    resolve(res);
                },
                fail: error=>{
                    if(typeof fail == "function"){
                        fail(error);
                    }
                    reject(error);
                }
            })
        } );
    }
    save_exercise({exercise_id, success, fail, complete}){
        return new Promise((resolve, reject) => {
            Exercise.save({
                session: this.session,
                exercise_id: exercise_id,
                complete: complete,
                success: res=>{
                    if(typeof success == "function"){
                        success(res);
                    };
                    resolve(res);
                },
                fail: error=>{
                    if(typeof success == "function"){
                        fail(error);
                    }
                    reject(error);
                }
            })
        });
    }
    commit_exercise({exercise_id, commit_method=1, success, fail , complete}){
        return new Promise((resolve, reject) => {
            Exercise.commit({
                session: this.session,
                exercise_id: exercise_id,
                commit_method: commit_method,
                complete: complete,
                success: res=>{
                    if(typeof success == "function"){
                        success(res);
                    };
                    resolve(res);
                },
                fail: error=>{
                    if(typeof success == "function"){
                        fail(error);
                    }
                    reject(error);
                }
            })
        });
    }
}