"use strict";

const Article = require("../article");
const { images_url } = require("../constants");
const { fetch_post_article, fetch_article, fetch_update_article } = require("../xhr");

class CreateArticleForm {
    constructor(params) {
        this.params = params || {};
        this.state = {
            output: new Article(this.params.data),
            article_sent: {},
        }
    }

    reset() {
        this.state.output = new Article();
        this.state.article_sent = {};
        this.refresh();
    }

    handle_text_input(field, e) {
        this.state.output[field] = e.target.value;
    }

    handle_del_detail(index) {
        this.state.output.details.splice(index, 1);
        this.refresh_details();
    }

    handle_add_detail() {
        this.state.output.details.push({ label: "", value: "" });
        this.refresh_details();
    }

    handle_del_image(index) {
        this.state.output.images.splice(index, 1);
        this.refresh_images();
    }

    handle_add_image() {
        this.state.output.images.push("")
        this.refresh_images();
    }

    refresh_details() {
        obj2htm.subRender(
            this.render_details_inputs(),
            document.getElementById("create-article-form-details"),
            { mode: "replace" }
        );
    }

    render_details_inputs() {
        return {
            tag: "ul",
            style_rules: {
                gridColumn: "1 / span 2",
                display: "flex",
                flexDirection: "column",
                gap: "10px",
                listStyleType: "none",
                padding: 0,
            },
            id: "create-article-form-details",
            contents: this.state.output.details.map((detail, i) => {
                return {
                    tag: "li",
                    style_rules: {
                        display: "grid",
                        gridTemplateColumns: "200px auto 60px",
                        gap: "10px",
                    },
                    contents: [
                        {
                            tag: "input",
                            type: "text",
                            placeholder: "Label",
                            value: detail.label,
                            oninput: e => {
                                this.state.output.details[i].label = e.target.value;
                            }
                        },
                        {
                            tag: "input",
                            type: "text",
                            placeholder: "Value",
                            value: detail.value,
                            oninput: e => {
                                this.state.output.details[i].value = e.target.value;
                            }
                        },
                        {
                            tag: "button", contents: "DEL",
                            onclick: this.handle_del_detail.bind(this, i)
                        }
                    ]
                }
            }).concat([
                {
                    tag: "li", contents: [{
                        tag: "button", contents: "ADD DETAIL",
                        onclick: this.handle_add_detail.bind(this)
                    }]
                }
            ])
        }
    }

    refresh_images() {
        obj2htm.subRender(
            this.render_images_inputs(),
            document.getElementById("create-article-form-images"),
            { mode: "replace" }
        );
    }

    render_images_inputs() {
        return {
            tag: "ul",
            style_rules: {
                gridColumn: "1 / span 2",
                display: "flex",
                flexDirection: "column",
                gap: "10px",
                listStyleType: "none",
                padding: 0,
            },
            id: "create-article-form-images",
            contents: this.state.output.images.map((img, i) => {
                return {
                    tag: "li",
                    style_rules: {
                        display: "flex",
                        alignItems: "center",
                        gap: "10px",
                    },
                    contents: [
                        {
                            tag: "div",
                            style_rules: {
                                display: "flex",
                                flexDirection: "center",
                                alignItems: "center",
                                justifyContent: "center",
                                width: "150px",
                                height: "150px",
                                overflow: "hidden",
                            },
                            contents: [
                                {
                                    tag: "img",
                                    style_rules: { minWidth: "100%", minHeight: "100%" },
                                    src: img ? `${images_url}/${img}` : "",
                                }
                            ],
                        },
                        {
                            tag: "input",
                            type: "text",
                            placeholder: "image file name",
                            value: img,
                            oninput: e => {
                                this.state.output.images[i] = e.target.value;
                            }
                        },
                        {
                            tag: "button", contents: "OK",
                            onclick: this.refresh_images.bind(this)
                        },
                        {
                            tag: "button", contents: "DEL",
                            onclick: this.handle_del_image.bind(this, i)
                        }
                    ]
                }
            }).concat([
                {
                    tag: "li", contents: [{
                        tag: "button", contents: "ADD IMAGE",
                        onclick: this.handle_add_image.bind(this)
                    }]
                }
            ])
        }
    }

    render_article_sent() {
        const article = this.state.article_sent;
        return {
            tag: "div",
            style_rules: {
                maxWidth: "800px",
            },
            contents: [
                { tag: "button", contents: "RESET", onclick: this.reset.bind(this) },
                { tag: "h2", contents: article.title },
                { tag: "h4", contents: article.subtitle },
                { tag: "p", contents: article.body.replace(/\n/g, "<br>") },
                {
                    tag: "ul", contents: article.details.map(det => {
                        return {
                            tag: "li",
                            style_rules: {
                                display: "flex",
                                gap: "20px",
                                justifyContent: "space-between",
                            },
                            contents: [
                                { tag: "span", contents: det.label },
                                { tag: "span", contents: det.value }
                            ]
                        };
                    })
                },
                {
                    tag: "div", style_rules: { display: "flex", gap: "10px" },
                    contents: article.images.map(img => {
                        return {
                            tag: "img",
                            style_rules: { height: "100px", width: "auto" },
                            src: `${images_url}/${img}`
                        }
                    })
                }
            ]
        }
    }

    refresh() {
        obj2htm.subRender(
            this.render(),
            document.getElementById("create-article-form"),
            { mode: "replace" }
        );
    }

    render() {
        return {
            tag: "form",
            id: "create-article-form",
            style_rules: {
                display: "grid",
                maxWidth: "800px",
                gridTemplateColumns: "1fr 1fr",
                gap: "20px",
            },
            onsubmit: e => {
                e.preventDefault();

                const __fetch = this.params.data
                    ? fetch_update_article
                    : fetch_post_article;

                __fetch(this.state.output)
                    .then(res => {
                        const id = res.insertedId ? res.insertedId.$oid : res._id ? res._id.$oid : undefined;
                        if (!id) {
                            alert("error")
                        } else {
                            fetch_article(id)
                                .then(article => {
                                    this.state.article_sent = article;
                                    this.params.on_article_sent && this.params.on_article_sent();
                                    this.refresh();
                                })
                                .catch(er => console.log(er));
                        }
                    })
                    .catch(err => console.log(err))
            },
            contents: this.state.article_sent._id ? [this.render_article_sent()] : [
                {
                    tag: "input", type: "text", placeholder: "category",
                    value: this.state.output.category,
                    oninput: this.handle_text_input.bind(this, "category")
                },
                {
                    tag: "select", value: this.state.output.locale,
                    onchange: e => this.state.output.locale = e.target.value,
                    contents: [{
                        tag: "option",
                        value: "",
                        contents: "-- LOCALE --"
                    }].concat(["fr", "en", "es"].map(loc => {
                        return {
                            tag: "option",
                            value: loc,
                            contents: loc,
                            selected: this.state.output.locale === loc
                        }
                    }))
                },
                {
                    tag: "input", type: "text",
                    placeholder: "Article title",
                    value: this.state.output.title,
                    oninput: this.handle_text_input.bind(this, "title")
                },
                {
                    tag: "input", type: "text",
                    style_rules: {
                        gridColumn: "1 / span 2"
                    },
                    placeholder: "Article subtitle",
                    value: this.state.output.subtitle,
                    oninput: this.handle_text_input.bind(this, "subtitle")
                },
                {
                    tag: "textarea",
                    style_rules: {
                        gridColumn: "1 / span 2",
                        height: "300px",
                    },
                    value: this.state.output.body,
                    placeholder: "Article body",
                    oninput: this.handle_text_input.bind(this, "body")
                },
                this.render_details_inputs(),
                this.render_images_inputs(),
                { tag: "input", type: "submit" }
            ]
        }
    }
}

module.exports = CreateArticleForm;