import htm from 'https://unpkg.com/htm?module'
const html = htm.bind(m);
var root = document.body

var currentUser = null;
try {
    currentUser = JSON.parse(Cookies.get("currentUser"))
} catch {}
var loggingIn = false;
var logInError = ""

var PlayerHead = {
    oncreate: function (vnode) {
        const ctx = vnode.dom.getContext('2d');
        ctx.imageSmoothingEnabled = false

        let img = new Image();
        img.src = `/getTexture/${currentUser.uuid}?type=skin`

        img.onload = function(){
            ctx.drawImage(img, 8, 8, 8, 8, 0, 0, 32, 32);
        }
    },
    view: function(vnode) {
        return html `
            <canvas id="playerHead" width="32" height="32" />
        `
    }
}

var Header = {
    view: function() {
        return html`
            <header>
                <a href="#!/" id="header-title">Tripwire</span>
                <div class="align-right">
                    ${currentUser ? 
                        html`
                            <${PlayerHead} />
                            <span>Hello, ${currentUser.username}</span>
                        ` :
                        html`<a class="button" href="#!/login">Log In</a>`
                    }
                </div>
            </header>
            <div id="header-spacer"></div>
        `
    }
}

var ErrorText = {
    view: function(vnode) {
        return html`
            <span class="errorText">${vnode.attrs.error.errorMessage}</span>
        `
    }
}

m.route(root, "/", {
    "/": {
        view: function() {
            return html`
                <${Header} />
                ${currentUser ? 
                    html`
                        <div class="center">
                            <a class="button" href="#!/skinchanger">Change skin</a>
                        </div>
                    ` :
                    html`<span>Please log in to continue.</span>`
                }
            `
        }
    },
    "/skinchanger": function SkinChanger() {
        var pageError = null;
        var success = false;
        return {
            view: function() {
                if (!currentUser) {
                    m.route.set("/login")
                }
                return html`
                    <${Header} />
                    ${currentUser ? 
                        success ? 
                        html `
                            <div class="center">
                                <span style="font-size: 1.5em;">Texture successfully uploaded!</span><br/><br/>
                                <a class="button" href="#!/">Go back</a>
                            </div>
                        ` :
                        html`
                            <div class="center">
                                <span style="font-size: 1.5em;">Select Skin/Cape </span>
                                <span>(only .PNG supported)</span><br/><br/>
                                <input style="display: inline;" 
                                    type="radio" 
                                    id="skinRadio" 
                                    name="textureId" 
                                    value="skin" 
                                    checked 
                                />
                                <label for="skinRadio">Skin</label>
                                <input style="display: inline;" 
                                    type="radio" 
                                    id="capeRadio" 
                                    name="textureId" 
                                    value="cape"
                                />
                                <label for="capeRadio">Cape</label>
                                <input id="textureFile" 
                                    style="width: 100%" 
                                    type="file" 
                                    accept="image/png" 
                                    onchange=${() => {
                                        pageError = null
                                    }} 
                                />
                                ${pageError && html`<${ErrorText} error=${pageError}/>`}
                                <button onclick=${() => {
                                    let input = document.getElementById("textureFile")
                                    if (input.files.length == 0) {
                                        return
                                    }

                                    let file = input.files[0]

                                    let body = new FormData()
                                    body.append("file", file)
                                    body.append("token", currentUser.token)
                                    m.request({
                                        method: "POST",
                                        url: "/setTexture/"+currentUser.uuid+"?type=" + 
                                            (document.getElementById("skinRadio").checked ? "skin" : "cape"),
                                        body: body,
                                    }).then((res) => {
                                        success = true
                                    }, (res) => {
                                        pageError = res.response
                                    })
                                }}>Let it rip</button>
                            </div>
                        ` :
                        html`<span>Please log in to continue.</span>`
                    }
                `
            }
        }
    },
    "/login": {
        view: function() {
            if (currentUser) {
                m.route.set("/")
            }
            let oninput = () => {
                logInError = null
            }
            return html`
                <${Header} />
                <div class="center">
                    <input id="usernameLogin" 
                        placeholder="Username" 
                        type="text" 
                        class=${logInError && "errorInput"} 
                        oninput=${oninput}
                    />
                    <input id="passwordLogin" 
                        placeholder="Password" 
                        type="text" 
                        class=${logInError && "errorInput"} 
                        oninput=${oninput}
                    />
                    ${logInError && html`
                        <${ErrorText} error=${logInError} />
                    `}
                    <button disabled=${loggingIn} onclick=${function() {
                        loggingIn = true;
                        m.request({
                            method: "POST",
                            url: "/webapi/logIn",
                            body: {
                                username: document.getElementById("usernameLogin").value,
                                password: document.getElementById("passwordLogin").value,
                            }
                        })
                        .then(function(result) {
                            currentUser = result
                            Cookies.set("currentUser", JSON.stringify(result))
                            loggingIn = false
                        }, function(result) {
                            logInError = result.response
                            loggingIn = false
                        })
                    }}>Log In</button>
                </div>
            `
        }
    }
})