var user = Volcanos("user", {help: "用户模块",
    alert: function(text) {alert(JSON.stringify(text))},
    confirm: function(text) {return confirm(JSON.stringify(text))},
    prompt: function(text, cb, def, silent) {(text = silent? def: prompt(text, def||"")) != undefined && typeof cb == "function" && cb(text); return text},
    reload: function(force) {(force || confirm("重新加载页面？")) && location.reload()},
    title: function(text) {return text && (document.title = text), document.title},

    login: function(can, cb) {
        var ui = can.user.input({clientX: 200, clientY: 100}, can, [
            {username: "username", name: "用户"},
            {password: "password", name: "密码"},
            {button: [["登录", function(event) {
                can.user.Cookie(can, "sessid", "")
                can.run({}, ["login", ui["用户"].value, ui["密码"].value], function(msg) {
                    if (can.user.Cookie(can, "sessid")||msg.Option("user.name")||msg.Result()) {
                        can.page.Remove(can, ui.first); return typeof cb == "function" && cb()
                    }
                    can.user.alert("用户或密码错误")
                })
            }], ["扫码", function(event) {
                // TODO
            }]]},
        ], function(event, button, data, list) {
            // TODO
        })
    },
    toast: function(can, text, title, duration) {
        var meta = typeof text == "object"? text: {text: text, title: title||can._help, duration: duration, progress: 0}
        var width = meta.width||200, height = meta.height||100

        var ui = can.page.Append(can, document.body,  [{view: "toast", style: {
            width: width, bottom: 100, left: document.body.clientWidth/2-width/2,
        }, list: [
            {text: [meta.title||"", "div", "title"]},
            typeof meta.text == "object"? meta.text: {text: [meta.text||"执行成功", "div", "content"]},
            {view: ["button"], list: meta.button},
            {text: ["", "div", "duration"]},
            meta.progress > 0 && {text: ["", "div", "progress"], style: {width: width}, list: [
                {text: ["", "div", "current"], style: {width: meta.progress/100*width}},
            ]},
        ]}])

        var timer = can.Timer({value: 100, length: (meta.duration||1000)/100}, function(event, interval, index) {
            if (index > 20) { ui.duration.innerHTML = parseInt(index/10)+"."+(index%10)+"s..." }
        }, function() { can.page.Remove(can, ui.first), timer.stop = true })

        ui.Close = function() { can.page.Remove(can, ui.first), timer.stop = true }
        return ui
    },
    share: function(can, msg, cmd) {
        can.run(msg._event, cmd||["action", "share"], function(msg) {
            var src = can.user.Share(can, {_path: "/share/"+msg.Result()}, true)
            var ui = can.user.toast(can, {title: can.page.Format("a", src, msg.Result()), text: can.page.Format("img", src+"/share"),
                width: 300, height: 300, duration: 100000, button: [{button: ["确定", function(event) {
                    ui.Close()
            }]}] })
        })
    },
    carte: function(can, meta, list, cb) { meta = meta || can.ondetail, list = list && list.length > 0? list: meta.list; if (list.length == 0) { return }
        meta = meta||can.ondetail||{}, cb = cb||function(ev, item, meta) {
            var cb = can.ondetail[item] || can.onaction[item] || can.onkeymap&&can.onkeymap._remote
            cb && cb(event, can, item)
        }

        var x = event.clientX, y = event.clientY; y += 0; if (x > 600) { x -= 20 }
        var ui = can.page.Append(can, document.body, [{view: "carte", style: {left: x+"px", top: y+"px"}, onmouseleave: function(event) {
            can.page.Remove(can, ui.first)
        }, list: can.core.List(list, function(item) {
            return {view: "item", list: [typeof item == "string"? /* button */ {text: item, click: function(event) {
                typeof cb == "function" && cb(event, item, meta)
            }}: item.args? /* input */ {text: item.name, click: function(event) {
                can.user.input(event, can, item.args, cb)
            }}: /* select */ {select: [item, function(event) {
                typeof cb == "function" && cb(event, event.target.value, meta)
            }]} ]}
        }) }])

        event.stopPropagation()
        event.preventDefault()
        return ui
    },
    input: function(event, can, form, cb) {
        function cbs(event, button) {
            var data = {}; var list = can.page.Select(can, ui.table, "select,input,textarea", function(item) {
                return data[item.name] = item.value
            })
            if (typeof cb == "function" && cb(event, button, data, list)) {
                can.page.Remove(can, ui.first)
            }
        }

        var x = event.clientX, y = event.clientY; y += 10; if (x > 600) { x -= 160 }
        var button; var ui = can.page.Append(can, document.body, [{view: ["input", "fieldset"], style: {left: x+"px", top: y+"px"}, list: [
            {view: ["option", "table"], list: can.core.List(form, function(item) {
                if (item.button) { button = can.core.List(item.button, function(item) {
                    return {button: typeof item == "object"? item: [item, function(event) { cbs(event, item) }]}
                }); return }
                return {type: ["tr"], list: [
                    {type: "td", list: [{text: typeof item == "string"? item: item.length > 0? item[0]: item.name || ""}]},
                    {type: "td", list: [typeof item == "string"? /* input */ {input: item, data: {autofocus: true}}:
                        item.length > 0? /* select */ {select: [item]}:
                            item._input == "select"? /* select */ {select: [[item.name].concat(item.values)], data: item}:
                                item._input? /* input */ {type: "input", data: (item.type = item._input, item), _init: function(target) {
                                    if (item._input == "text" && item.value && item.value.startsWith("@")) {
                                        can.require(["/plugin/input/"+item.value.slice(1)], function(can) {
                                            can.core.Item(can.onfigure[item.value.slice(1)], function(key, value) { if (key.startsWith("on")) {
                                                target[key] = function(event) { value(event, can, item, target) }
                                            } })
                                            target.type != "button" && (target.value = "")
                                        })
                                        can.page.Modify(can, target, {autocomplete: "off"})
                                    }
                                }}: /* other */ item,
                    ]},
                ]}
            })},
            {view: "action", list: button||[{button: ["提交", function(event) {
                cbs(event, "提交")
            }]}, {button: ["关闭", function(event, button) {
                can.page.Remove(can, ui.first)
            }]}]},
        ]}])
        can.page.Select(can, ui.first, "input", function(item, index) {
            index == 0 && (item.setSelectionRange(0, -1), item.focus())
        })
        return ui
    },
    upload: function(event, can) { var begin = new Date()
        var x = event.clientX, y = event.clientY; y += 10; if (x > 400) { x -= 200 }
        var ui = can.page.Append(can, document.body, [{view: "upload", style: {left: x+"px", top: y+"px"}, list: [
            {view: "action"}, {view: "output"},
        ]}])

        function show(event, value, total, loaded) {
            var now = new Date(); can.page.Appends(can, ui.output, [
                {view: ["progress"], style: {height: "10px", border: "solid 2px red"}, list: [{
                    view: ["progress"], style: {height: "10px", width: value + "%", background: "red"},  
                }]},
                {text: [value+"%", "div"], style: {"float": "right"}},
                {text: [can.base.Duration(now - begin), "div"], style: {"float": "left"}},
                {text: [can.base.Size(loaded)+"/"+can.base.Size(total), "div"], style: {"text-align": "center"}},
            ])
        }

        var action = can.page.AppendAction(can, ui.action, [
            {type: "input", data: {name: "upload", type: "file", onchange: function(event) {
                var file = action.upload.files[0]
                show(event, 0, file.size, 0)
            }}, style: {width: "200px"}}, "上传", "关闭"], function(event, value, cmd) {
                if (value == "关闭") { return can.page.Remove(can, ui.first) }
                if (action.upload.files.length == 0) {return action.upload.focus()}

                var msg = can.request(event)
                can.core.Item(can.Option(), msg.Option)

                // 上传文件
                begin = new Date()
                msg._progress = show
                msg.upload = action.upload.files[0]
                can.run(event, ["action", "upload"], function(msg) {
                    can.user.toast(can, "上传成功")
                }, true)
            })
        action.upload.click()
        return ui
    },
    download: function(can, path) {
        var a = can.page.Append(can, document.body, [{type: "a", href: path, download: path.split("/").pop()}]).first
        a.click()
        can.page.Remove(can, a)
    },

    Share: shy("共享链接", function(can, objs, clear) {var obj = objs || {}; var path = location.pathname;
        obj._path && (path = obj._path, delete(obj._path))
        !clear && can.core.Item(can.user.Search(), function(key, value) {obj[key] || (obj[key] = value)});
        return can.core.List([location.origin+path, can.core.Item(obj, function(key, value) {
            if (!value) { return }
            return can.core.List(value, function(value) {return key+"="+encodeURIComponent(value)}).join("&")
        }).join("&")], function(item) { return item? item: undefined }).join("?")
    }),
    Search: shy("请求参数", function(can, key, value) {var args = {}
        location.search && location.search.slice(1).split("&").forEach(function(item) {var x = item.split("=")
            x[1] != "" && (args[x[0]] = decodeURIComponent(x[1]))
        })

        if (typeof key == "object") {
            can.core.Item(key, function(key, value) {
                if (value != undefined) {args[key] = value}
                args[key] == "" && delete(args[key])
            })
        } else if (key == undefined) {
            return args
        } else if (value == undefined) {
            // return args[key] || can.user.Cookie(can, key)
            return args[key]||can.user.locals(can, key)
        } else {
            args[key] = value
            args[key] == "" && delete(args[key])
        }

        return location.search = can.core.Item(args, function(key, value) {
            return key+"="+encodeURIComponent(value)
        }).join("&")
    }),
    Searchs: shy("请求参数", function(can, key, def) {
        return can.user.Search(can, "active") == can._name? can.user.Search(can, key): def
    }),
    Cookie: shy("会话变量", function(can, key, value, path) {
        function set(k, v) {document.cookie = k+"="+v+";path="+(path||"/")}

        if (typeof key == "object") {
            for (var k in key) {set(k, key[k])}
            key = null
        }
        if (key == undefined) {var cs = {}
            document.cookie.split("; ").forEach(function(item) {
                var cookie = item.split("=")
                cs[cookie[0]] = cookie[1]
            })
            return cs
        }

        value != undefined && set(key, value)
        var result = (new RegExp(key+"=([^;]*);?")).exec(document.cookie)
        return result && result.length > 0? result[1]: ""
    }),
    locals: function(can, key, value) {
        if (typeof key == "object") {
            can.core.Item(key, function(key, value) {
                localStorage.setItem(key, value)
            })
            return key
        }
        if (value != undefined) {
            localStorage.setItem(key, value)
        }
        if (key != undefined) {
            return localStorage.getItem(key)
        }
    },

    isWeiXin: navigator.userAgent.indexOf("MicroMessenger") > -1,
    isMobile: navigator.userAgent.indexOf("Mobile") > -1,
    isIPhone: navigator.userAgent.indexOf("iPhone") > -1,
    isMacOSX: navigator.userAgent.indexOf("Mac OS X") > -1,
    isWindows: navigator.userAgent.indexOf("Windows") > -1,
    isExtension: location && location.protocol && location.protocol == "chrome-extension:",
})