@using Sandbox
@using Sandbox.UI
@using Socer
@using System
@using System.Collections.Generic
@using System.Linq
@inherits Panel

<root class="skill-catalog localized-text">
    <div class="skill-catalog-controls">
        <TextEntry class="skill-catalog-search" Value:bind="@SearchText" Placeholder="@T("Поиск скилла","Search skills")" />
        <div class="skill-catalog-filters">
            @foreach(var role in Roles)
            {
                var option=role;
                <button class="skill-catalog-filter [email protected]().ToLowerInvariant() @(RoleFilter==role?"chosen":"")" onclick=@(()=>SetRole(option))>@RoleName(role)</button>
            }
        </div>
        <div class="skill-catalog-grades">
            <button class="skill-catalog-normal @(Grade==1?"chosen":"")" onclick=@(()=>SetGrade(1))>@UniqueSkills.GradeName(1,GamePreferences.Russian)</button>
            <button class="skill-catalog-gold @(Grade==2?"chosen":"")" onclick=@(()=>SetGrade(2))>@UniqueSkills.GradeName(2,GamePreferences.Russian)</button>
        </div>
    </div>
    <div class="skill-catalog-content">
        <div class="skill-catalog-results">
            <div class="skill-catalog-result-heading"><label>@T("Все скиллы","Skill library")</label><label class="skill-catalog-count">@($"{VisibleSkills.Length} / {Definitions.Length}")</label></div>
            @if(VisibleSkills.Length>0)
            {
                <div class="skill-catalog-grid">
                    @foreach(var ability in VisibleSkills)
                    {
                        var skill=ability.Skill;
                        <button class="skill-catalog-tile [email protected]().ToLowerInvariant() skill-grade-@Grade @(Selected==skill?"chosen":"")" onclick=@(()=>Select(skill))>
                            <SkillBadgeView Skill="@skill" Grade="@Grade" CssClass="skill-catalog-icon" />
                            <label class="skill-catalog-name">@ability.Name(GamePreferences.Russian)</label>
                            <label class="skill-catalog-type">@($"{ability.Role(GamePreferences.Russian)} · "+(ability.IsPassive?T("Постоянный","Passive"):T("Приём","Active")))</label>
                        </button>
                    }
                </div>
            }
            else
            {
                <div class="skill-catalog-empty"><label>@T("Скиллы не найдены","No skills found")</label><label>@T("Попробуйте другое название или роль.","Try another name or role.")</label><button class="skill-catalog-reset" onclick=@ClearFilters>@T("Сбросить поиск","Reset search")</button></div>
            }
        </div>
        <div class="skill-catalog-detail">
            @if(Selected!=UniqueSkill.None){<CardSkillView Instance="@DetailInstance" />}
            else{<label class="skill-catalog-detail-empty">@T("Выберите скилл в библиотеке, чтобы увидеть его условия и связки.","Select a skill to see its conditions and combinations.")</label>}
        </div>
    </div>
</root>

@code {
    enum SkillRole { All,Attack,Midfield,Defence,Goalkeeper }
    static readonly SkillRole[] Roles={SkillRole.All,SkillRole.Attack,SkillRole.Midfield,SkillRole.Defence,SkillRole.Goalkeeper};
    static readonly UniqueSkillInfo[] Definitions=UniqueSkills.All.ToArray();
    // These are eligibility pools, not presentation labels. Shared skills are
    // included for every role that can actually receive them from an upgrade.
    static readonly HashSet<UniqueSkill> AttackPool=new(UniqueSkills.Pool(new PlayerCard{PreferredPosition="ST"}));
    static readonly HashSet<UniqueSkill> MidfieldPool=new(UniqueSkills.Pool(new PlayerCard{PreferredPosition="CM"}));
    static readonly HashSet<UniqueSkill> DefencePool=new(UniqueSkills.Pool(new PlayerCard{PreferredPosition="CB"}));
    static readonly HashSet<UniqueSkill> KeeperPool=new(UniqueSkills.Pool(new PlayerCard{PreferredPosition="GK"}));
    UniqueSkillInfo[] VisibleSkills=Definitions;
    SkillRole RoleFilter=SkillRole.All;
    UniqueSkill Selected=Definitions.FirstOrDefault()?.Skill??UniqueSkill.None;
    int Grade=1;
    string search="";
    readonly SkillInstance DetailInstance=new(){Skill=Definitions.FirstOrDefault()?.Skill??UniqueSkill.None,Grade=1};

    public string SearchText
    {
        get=>search;
        set{var next=value??"";if(next==search)return;search=next;ApplyFilters();}
    }
    static string T(string ru,string en)=>GamePreferences.Russian?ru:en;
    static string RoleName(SkillRole role)=>role switch
    {
        SkillRole.Attack=>T("Атака","Attack"),SkillRole.Midfield=>T("Полузащита","Midfield"),SkillRole.Defence=>T("Защита","Defence"),
        SkillRole.Goalkeeper=>T("Вратарь","Goalkeeper"),_=>T("Все","All")
    };
    void SetRole(SkillRole role){if(RoleFilter==role)return;RoleFilter=role;ApplyFilters();}
    void SetGrade(int grade){if(Grade==grade)return;Grade=grade;DetailInstance.Grade=grade;}
    void Select(UniqueSkill skill){Selected=skill;DetailInstance.Skill=skill;}
    void ClearFilters(){search="";RoleFilter=SkillRole.All;ApplyFilters();}

    void ApplyFilters()
    {
        string query=search.Trim().Replace('ё','е').Replace('Ё','Е');
        HashSet<UniqueSkill> pool=RoleFilter switch
        {
            SkillRole.Attack=>AttackPool,SkillRole.Midfield=>MidfieldPool,SkillRole.Defence=>DefencePool,
            SkillRole.Goalkeeper=>KeeperPool,_=>null
        };
        VisibleSkills=pool==null && query.Length==0?Definitions:Definitions.Where(ability=>
            (pool==null || pool.Contains(ability.Skill)) &&
            (query.Length==0 || ability.EnglishName.Contains(query,StringComparison.OrdinalIgnoreCase) ||
            ability.RussianName.Replace('ё','е').Replace('Ё','Е').Contains(query,StringComparison.OrdinalIgnoreCase))).ToArray();
        if(!VisibleSkills.Any(ability=>ability.Skill==Selected))Selected=VisibleSkills.FirstOrDefault()?.Skill??UniqueSkill.None;
        DetailInstance.Skill=Selected;DetailInstance.Grade=Grade;
    }

    // Search and selection invalidate only this small library. Rendering does
    // not follow match frames or allocate a detail view for every skill/grade.
    protected override int BuildHash()=>HashCode.Combine(search,RoleFilter,Grade,Selected,GamePreferences.Russian);
}