@namespace Oqtane.Modules.Admin.Pages
@inherits ModuleBase
@inject NavigationManager NavigationManager
@inject IPageService PageService
@inject IThemeService  ThemeService
@inject ISystemService SystemService
@inject IStringLocalizer<Add> Localizer
@inject IStringLocalizer<SharedResources> SharedLocalizer

@if (_initialized)
{
    <form @ref="form" class="@(validated ? "was-validated" : "needs-validation")" novalidate>
        <TabStrip Refresh="@_refresh">
            <TabPanel Name="Settings" ResourceKey="Settings" Heading="Settings">
                <div class="container">
                    <div class="row mb-1 align-items-center">
                        <Label Class="col-sm-3" For="name" HelpText="Enter the page name" ResourceKey="Name">Name: </Label>
                        <div class="col-sm-9">
                            <input id="name" class="form-control" @bind="@_name" required />
                        </div>
                    </div>
                    @if (UserSecurity.IsAuthorized(PageState.User, RoleNames.Admin))
                    {
                        <div class="row mb-1 align-items-center">
                            <Label Class="col-sm-3" For="parent" HelpText="Select the parent for the page in the site hierarchy" ResourceKey="Parent">Parent: </Label>
                            <div class="col-sm-9">
                                <select id="parent" class="form-select" value="@_parentid" @onchange="(e => ParentChanged(e))" required>
                                    <option value="-1">&lt;@Localizer["SiteRoot"]&gt;</option>
                                    @foreach (Page page in _pages)
                                    {
                                        if (UserSecurity.IsAuthorized(PageState.User, PermissionNames.View, page.PermissionList))
                                        {
                                            <option value="@(page.PageId)">@(new string('-', page.Level * 2))@(page.Name)</option>
                                        }
                                    }
                                </select>
                            </div>
                        </div>
                        <div class="row mb-1 align-items-center">
                            <Label Class="col-sm-3" For="insert" HelpText="Select the location where you would like the page to be inserted in relation to other pages" ResourceKey="Insert">Insert: </Label>
                            <div class="col-sm-9">
                                <select id="insert" class="form-select" @bind="@_insert" required>
                                    @if (_children != null && _children.Count > 0)
                                    {
                                        <option value="<<">@Localizer["AtBeginning"]</option>
                                        <option value="<">@Localizer["Before"]</option>
                                        <option value=">">@Localizer["After"]</option>
                                    }
                                    <option value=">>">@Localizer["AtEnd"]</option>
                                </select>
                                @if (_children != null && _children.Count > 0 && (_insert == "<" || _insert == ">"))
                                {
                                    <select class="form-select" @bind="@_childid">
                                        <option value="-1">&lt;@Localizer["Page.Select"]&gt;</option>
                                        @foreach (Page page in _children)
                                        {
                                            <option value="@(page.PageId)">@(page.Name)</option>
                                        }
                                    </select>
                                }
                            </div>
                        </div>
                    }
                    else
                    {
                        <div class="row mb-1 align-items-center">
                            <Label Class="col-sm-3" For="parent" HelpText="Select the parent for the page in the site hierarchy" ResourceKey="Parent">Parent: </Label>
                            <div class="col-sm-9">
                                <select id="parent" class="form-select" @onchange="(e => ParentChanged(e))" required>
                                    <option value="@(_parent.PageId)">@(new string('-', _parent.Level * 2))@(_parent.Name)</option>
                                </select>
                            </div>
                        </div>
                        <div class="row mb-1 align-items-center">
                            <Label Class="col-sm-3" For="insert" HelpText="Select the location where you would like the page to be inserted in relation to other pages" ResourceKey="Insert">Insert: </Label>
                            <div class="col-sm-9">
                                <select id="insert" class="form-select" @bind="@_insert" required>
                                    <option value=">>">@Localizer["AtEnd"]</option>
                                </select>
                            </div>
                        </div>
                    }
                    <div class="row mb-1 align-items-center">
                        <Label Class="col-sm-3" For="navigation" HelpText="Select whether the page is part of the site navigation or hidden" ResourceKey="Navigation">Navigation? </Label>
                        <div class="col-sm-9">
                            <select id="navigation" class="form-select" @bind="@_isnavigation" required>
                                <option value="True">@SharedLocalizer["Yes"]</option>
                                <option value="False">@SharedLocalizer["No"]</option>
                            </select>
                        </div>
                    </div>
                    <div class="row mb-1 align-items-center">
                        <Label Class="col-sm-3" For="clickable" HelpText="Select whether the link in the site navigation is enabled or disabled" ResourceKey="Clickable">Clickable? </Label>
                        <div class="col-sm-9">
                            <select id="clickable" class="form-select" @bind="@_isclickable" required>
                                <option value="True">@SharedLocalizer["Yes"]</option>
                                <option value="False">@SharedLocalizer["No"]</option>
                            </select>
                        </div>
                    </div>
                    <div class="row mb-1 align-items-center">
                        <Label Class="col-sm-3" For="path" HelpText="Optionally enter a url path for this page (ie. home ). If you do not provide a url path, the page name will be used. If the page is intended to be the root path specify '/'." ResourceKey="UrlPath">Url Path: </Label>
                        <div class="col-sm-9">
                            <input id="path" class="form-control" @bind="@_path" />
                        </div>
                    </div>
                    <div class="row mb-1 align-items-center">
                        <Label Class="col-sm-3" For="url" HelpText="Optionally enter a url which this page should redirect to when a user navigates to it" ResourceKey="Redirect">Redirect: </Label>
                        <div class="col-sm-9">
                            <input id="url" class="form-control" @bind="@_url" />
                        </div>
                    </div>
                    <div class="row mb-1 align-items-center">
                        <Label Class="col-sm-3" For="icon" HelpText="Optionally provide an icon class name for this page which will be displayed in the site navigation" ResourceKey="Icon">Icon: </Label>
                        <div class="col-sm-8">
                            <InputList Value="@_icon" ValueChanged="IconChanged" DataList="@_icons" ResourceKey="Icon" ResourceType="@_iconresources" />
                        </div>
                        <div class="col-sm-1">
                            <i class="@_icon"></i>
                        </div>
                    </div>
                    <div class="row mb-1 align-items-center">
                        <Label Class="col-sm-3" For="effectiveDate" HelpText="The date that this page is active" ResourceKey="EffectiveDate">Effective Date: </Label>
                        <div class="col-sm-9">
                            <input type="date" id="effectiveDate" class="form-control" @bind="@_effectivedate" />
                        </div>
                    </div>
                    <div class="row mb-1 align-items-center">
                        <Label Class="col-sm-3" For="expiryDate" HelpText="The date that this page expires" ResourceKey="ExpiryDate">Expiry Date: </Label>
                        <div class="col-sm-9">
                            <input type="date" id="expiryDate" class="form-control" @bind="@_expirydate" />
                        </div>
                    </div>
                    <div class="row mb-1 align-items-center">
                        <Label Class="col-sm-3" For="personalizable" HelpText="Select whether you would like users to be able to personalize this page with their own content" ResourceKey="Personalizable">Personalizable? </Label>
                        <div class="col-sm-9">
                            <select id="personalizable" class="form-select" @bind="@_ispersonalizable" required>
                                <option value="True">@SharedLocalizer["Yes"]</option>
                                <option value="False">@SharedLocalizer["No"]</option>
                            </select>
                        </div>
                    </div>
                </div>

                <Section Name="Appearance" ResourceKey="Appearance" Heading=@Localizer["Appearance.Name"]>
                    <div class="container">
                        <div class="row mb-1 align-items-center">
                            <Label Class="col-sm-3" For="title" HelpText="Optionally enter the page title. If you do not provide a page title, the page name will be used." ResourceKey="Title">Title: </Label>
                            <div class="col-sm-9">
                                <input id="title" class="form-control" @bind="@_title" />
                            </div>
                        </div>
                        <div class="row mb-1 align-items-center">
                            <Label Class="col-sm-3" For="theme" HelpText="Select the theme for this page" ResourceKey="Theme">Theme: </Label>
                            <div class="col-sm-9">
                                <select id="theme" class="form-select" value="@_themetype" @onchange="(e => ThemeChanged(e))" required>
                                    @foreach (var theme in _themes)
                                    {
                                        <option value="@theme.TypeName">@theme.Name</option>
                                    }
                                </select>
                            </div>
                        </div>
                        <div class="row mb-1 align-items-center">
                            <Label Class="col-sm-3" For="container" HelpText="Select the default container for the page" ResourceKey="DefaultContainer">Default Container: </Label>
                            <div class="col-sm-9">
                                <select id="container" class="form-select" @bind="@_containertype" required>
                                    @foreach (var container in _containers)
                                    {
                                        <option value="@container.TypeName">@container.Name</option>
                                    }
                                </select>
                            </div>
                        </div>
                    </div>
                </Section>
                <Section Name="PageContent" ResourceKey="PageContent" Heading=@Localizer["PageContent.Heading"]>
                    <div class="container">
                        <div class="row mb-1 align-items-center">
                            <Label Class="col-sm-3" For="headcontent" HelpText="Optionally enter content to be included in the page head (ie. meta, link, or script tags)" ResourceKey="HeadContent">Head Content: </Label>
                            <div class="col-sm-9">
                                <textarea id="headcontent" class="form-control" @bind="@_headcontent" rows="3"></textarea>
                            </div>
                        </div>
                        <div class="row mb-1 align-items-center">
                            <Label Class="col-sm-3" For="bodycontent" HelpText="Optionally enter content to be included in the page body (ie. script tags)" ResourceKey="BodyContent">Body Content: </Label>
                            <div class="col-sm-9">
                                <textarea id="bodycontent" class="form-control" @bind="@_bodycontent" rows="3"></textarea>
                            </div>
                        </div>
                    </div>
                </Section>
            </TabPanel>
            <TabPanel Name="Permissions" ResourceKey="Permissions" Heading=@Localizer["Permissions.Heading"]>
                <div class="container">
                    <div class="row mb-1 align-items-center">
                        <PermissionGrid EntityName="@EntityNames.Page" Permissions="@_permissions" @ref="_permissionGrid" />
                    </div>
                </div>
            </TabPanel>
        </TabStrip>
        <br />
        <button type="button" class="btn btn-success" @onclick="SavePage">@SharedLocalizer["Save"]</button>
        <button type="button" class="btn btn-secondary" @onclick="Cancel">@SharedLocalizer["Cancel"]</button>
    </form>
}

@code {
    public override SecurityAccessLevel SecurityAccessLevel => SecurityAccessLevel.View;

    private bool _initialized = false;
    private ElementReference form;
    private bool validated = false;
    private List<ThemeControl> _themes = new List<ThemeControl>();
    private List<ThemeControl> _containers = new List<ThemeControl>();
    private List<Page> _pages;
    private int _pageId;
    private string _name;
    private string _parentid = "-1";
    private string _insert = ">>";
    private List<Page> _children;
    private int _childid = -1;
    private string _isnavigation = "True";
    private string _isclickable = "True";
    private string _path = string.Empty;
    private string _url;
    private string _ispersonalizable = "False";
    private string _title;
    private string _icon = string.Empty;
    private string _themetype = string.Empty;
    private string _containertype = string.Empty;
    private string _headcontent;
    private string _bodycontent;
    private string _permissions = null;
    private PermissionGrid _permissionGrid;
    private bool _refresh = false;
    protected Page _parent = null;
    protected Dictionary<string, string> _icons;
    private string _iconresources = "";
    private DateTime? _effectivedate = null;
    private DateTime? _expirydate = null;

    protected override async Task OnInitializedAsync()
    {
        try
        {
            _pages = await PageService.GetPagesAsync(PageState.Site.SiteId);

            if (PageState.QueryString.ContainsKey("id"))
            {
                _pageId = Int32.Parse(PageState.QueryString["id"]);
                _parent = await PageService.GetPageAsync(_pageId);
                if (_parent != null)
                {
                    _parentid = _parent.PageId.ToString();
                }
            }
            _icons = await SystemService.GetIconsAsync();
            _iconresources = typeof(IconResources).FullName;

            // if admin or user has edit access to parent page
            if (UserSecurity.IsAuthorized(PageState.User, RoleNames.Admin) || (_parent != null && UserSecurity.IsAuthorized(PageState.User, PermissionNames.Edit, _parent.PermissionList)))
            {
                _themetype = PageState.Site.DefaultThemeType;
                _themes = ThemeService.GetThemeControls(PageState.Site.Themes);
                _containers = ThemeService.GetContainerControls(PageState.Site.Themes, _themetype);
                _containertype = PageState.Site.DefaultContainerType;
                _children = new List<Page>();
                foreach (Page p in _pages.Where(item => (_parentid == "-1" && item.ParentId == null) || (item.ParentId == int.Parse(_parentid))))
                {
                    if (UserSecurity.IsAuthorized(PageState.User, PermissionNames.View, p.PermissionList))
                    {
                        _children.Add(p);
                    }
                }
                _effectivedate = Utilities.UtcAsLocalDate(PageState.Page.EffectiveDate);
                _expirydate = Utilities.UtcAsLocalDate(PageState.Page.ExpiryDate);
                _initialized = true;
            }
            else
            {
                await logger.LogWarning("Error Loading Page {ParentId}", _parentid);
                AddModuleMessage(Localizer["Error.Page.Load"], MessageType.Error);
            }
        }
        catch (Exception ex)
        {
            await logger.LogError(ex, "Error Loading Page {Error}", ex.Message);
            AddModuleMessage(Localizer["Error.Page.Load"], MessageType.Error);
        }
    }

    private async void ParentChanged(ChangeEventArgs e)
    {
        try
        {
            _parentid = (string)e.Value;
            _children = new List<Page>();
            foreach (Page p in _pages.Where(item => (_parentid == "-1" && item.ParentId == null) || (item.ParentId == int.Parse(_parentid))))
            {
                if (UserSecurity.IsAuthorized(PageState.User, PermissionNames.View, p.PermissionList))
                {
                    _children.Add(p);
                }
            }
            StateHasChanged();
        }
        catch (Exception ex)
        {
            await logger.LogError(ex, "Error Loading Child Pages For Parent {PageId} {Error}", _parentid, ex.Message);
            AddModuleMessage(Localizer["Error.ChildPage.Load"], MessageType.Error);
        }
    }

    private void ThemeChanged(ChangeEventArgs e)
    {
        _themetype = (string)e.Value;
        _containers = ThemeService.GetContainerControls(PageState.Site.Themes, _themetype);
        _containertype = _containers.First().TypeName;
        StateHasChanged();

        // if theme chosen is different than default site theme, display warning message to user
        if (ThemeService.GetTheme(PageState.Site.Themes, _themetype)?.ThemeName != ThemeService.GetTheme(PageState.Site.Themes, PageState.Site.DefaultThemeType)?.ThemeName)
        {
            AddModuleMessage(Localizer["ThemeChanged.Message"], MessageType.Warning);
        }
    }

    private async Task SavePage()
    {
        validated = true;
        var interop = new Interop(JSRuntime);
        if (await interop.FormValid(form))
        {
            Page page = null;
            try
            {
                if (!Utilities.ValidateEffectiveExpiryDates(_effectivedate, _expirydate))
                {
                    AddModuleMessage(SharedLocalizer["Message.EffectiveExpiryDateError"], MessageType.Warning);
                    return;
                }
                if (!string.IsNullOrEmpty(_themetype) && !string.IsNullOrEmpty(_containertype))
                {
                    page = new Page();
                    page.SiteId = PageState.Page.SiteId;
                    page.Name = _name;

                    if (_parentid == "-1")
                    {
                        page.ParentId = null;
                    }
                    else
                    {
                        page.ParentId = Int32.Parse(_parentid);
                    }
                    
                    if (string.IsNullOrEmpty(_path))
                    {
                        _path = _name;
                    }

                    if (_path.Contains("/"))
                    {
                        if (_path.EndsWith("/") && _path != "/")
                        {
                            _path = _path.Substring(0, _path.Length - 1);
                        }
                        _path = _path.Substring(_path.LastIndexOf("/") + 1);
                    }
                    if (_parentid == "-1")
                    {
                        page.Path = Utilities.GetFriendlyUrl(_path);
                    }
                    else
                    {
                        Page parent = _pages.FirstOrDefault(item => item.PageId == page.ParentId);
                        if (parent.Path == string.Empty)
                        {
                            page.Path = Utilities.GetFriendlyUrl(parent.Name) + "/" + Utilities.GetFriendlyUrl(_path);
                        }
                        else
                        {
                            page.Path = parent.Path + "/" + Utilities.GetFriendlyUrl(_path);
                        }
                    }

                    if (_pages.Any(item => item.Path == page.Path))
                    {
                        AddModuleMessage(string.Format(Localizer["Message.Page.Exists"], _path), MessageType.Warning);
                        return;
                    }

                    if (page.ParentId == null && Constants.ReservedRoutes.Contains(page.Name.ToLower()))
                    {
                        AddModuleMessage(string.Format(Localizer["Message.Page.Reserved"], page.Name), MessageType.Warning);
                        return;
                    }

                    Page child;
                    switch (_insert)
                    {
                        case "<<":
                            page.Order = 0;
                            break;
                        case "<":
                            child = _pages.Where(item => item.PageId == _childid).FirstOrDefault();
                            page.Order = child.Order - 1;
                            break;
                        case ">":
                            child = _pages.Where(item => item.PageId == _childid).FirstOrDefault();
                            page.Order = child.Order + 1;
                            break;
                        case ">>":
                            page.Order = int.MaxValue;
                            break;
                    }

                    page.IsNavigation = (_isnavigation == null ? true : Boolean.Parse(_isnavigation));
                    page.IsClickable = (_isclickable == null ? true : Boolean.Parse(_isclickable));
                    page.Url = _url;
                    page.IsPersonalizable = (_ispersonalizable == null ? false : Boolean.Parse(_ispersonalizable));
                    page.EffectiveDate = Utilities.LocalDateAndTimeAsUtc(_effectivedate);
                    page.ExpiryDate = Utilities.LocalDateAndTimeAsUtc(_expirydate);
                    page.UserId = null;

                    // appearance
                    page.Title = _title;
                    page.Icon = (_icon == null ? string.Empty : _icon);
                    page.ThemeType = _themetype;
                    if (!string.IsNullOrEmpty(page.ThemeType) && page.ThemeType == PageState.Site.DefaultThemeType)
                    {
                        page.ThemeType = string.Empty;
                    }
                    page.DefaultContainerType = _containertype;
                    if (!string.IsNullOrEmpty(page.DefaultContainerType) && page.DefaultContainerType == PageState.Site.DefaultContainerType)
                    {
                        page.DefaultContainerType = string.Empty;
                    }

                    // page content
                    page.HeadContent = _headcontent;
                    page.BodyContent = _bodycontent;

                    // permissions
                    page.PermissionList = _permissionGrid.GetPermissionList();

                    page = await PageService.AddPageAsync(page);
                    await PageService.UpdatePageOrderAsync(page.SiteId, page.PageId, page.ParentId);

                    await logger.LogInformation("Page Added {Page}", page);
                    if (!string.IsNullOrEmpty(PageState.ReturnUrl))
                    {
                        NavigationManager.NavigateTo(NavigateUrl(page.Path), true); // redirect to page added and reload
                    }
                    else
                    {
                        NavigationManager.NavigateTo(NavigateUrl()); // redirect to page management
                    }
                }
                else
                {
                    AddModuleMessage(Localizer["Message.Required.PageInfo"], MessageType.Warning);
                }

            }
            catch (Exception ex)
            {
                await logger.LogError(ex, "Error Saving Page {Page} {Error}", page, ex.Message);
                AddModuleMessage(Localizer["Error.Page.Save"], MessageType.Error);
            }
        }
        else
        {
            AddModuleMessage(SharedLocalizer["Message.InfoRequired"], MessageType.Warning);
        }
    }

    private void Cancel()
    {
        if (!string.IsNullOrEmpty(PageState.ReturnUrl))
        {
            NavigationManager.NavigateTo(PageState.ReturnUrl);
        }
        else
        {
            NavigationManager.NavigateTo(NavigateUrl());
        }
    }
    private void IconChanged(string NewIcon)
    {
        _icon = NewIcon;
    }
}
