@page "/card-notes"
@implements IDisposable

<PageTitle>Card Notes Management - Chrono DB</PageTitle>

<div class="d-flex align-items-center justify-content-between mb-4">
    <div>
        <h2 class="fw-bold mb-1 text-white">Card Notes Database (`CardNote`)</h2>
        <p class="text-secondary mb-0">Browse, add, edit, and delete notes associated with Chrono CCG cards.</p>
    </div>
    <div class="d-flex gap-2">
        <button class="btn btn-chrono-secondary" @onclick="LoadNotesAsync">
            <i class="bi bi-arrow-clockwise"></i> Refresh
        </button>
        <button class="btn btn-chrono-primary" @onclick="OpenAddModal">
            <i class="bi bi-plus-lg"></i> Add New Note
        </button>
    </div>
</div>

@if (!string.IsNullOrEmpty(alertMessage))
{
    <div class="alert @(alertIsSuccess ? "alert-success" : "alert-danger") alert-dismissible fade show" role="alert">
        <i class="bi @(alertIsSuccess ? "bi-check-circle-fill" : "bi-exclamation-triangle-fill") me-2"></i>
        @alertMessage
        <button type="button" class="btn-close" @onclick="() => alertMessage = null"></button>
    </div>
}

<div class="chrono-card">
    <div class="d-flex align-items-center justify-content-between mb-3 gap-3">
        <div class="input-group" style="max-width: 400px;">
            <span class="input-group-text bg-dark border-secondary text-secondary"><i class="bi bi-search"></i></span>
            <input type="text" class="form-control form-control-chrono" placeholder="Search by card name or note content..."
                   @bind="searchTerm" @bind:event="oninput" @bind:after="FilterNotes" />
            @if (!string.IsNullOrEmpty(searchTerm))
            {
                <button class="btn btn-outline-secondary" @onclick="ClearSearch"><i class="bi bi-x-lg"></i></button>
            }
        </div>

        <div class="text-secondary small">
            Showing @notes.Count note(s)
        </div>
    </div>

    @if (isLoading)
    {
        <div class="text-center py-5 text-secondary">
            <div class="spinner-border text-primary mb-2" role="status"></div>
            <div>Loading card notes from database...</div>
        </div>
    }
    else if (!notes.Any())
    {
        <div class="text-center py-5 text-secondary">
            <i class="bi bi-journal-x fs-1 d-block mb-2"></i>
            <h5>No Card Notes Found</h5>
            <p class="small">There are currently no card notes matching your criteria.</p>
            <div class="d-flex justify-content-center gap-2 mt-3">
                <button class="btn btn-chrono-primary" @onclick="OpenAddModal">
                    <i class="bi bi-plus-lg"></i> Add First Note
                </button>
                <button class="btn btn-chrono-secondary" @onclick="SeedSampleNotesAsync">
                    <i class="bi bi-box-arrow-in-down"></i> Seed Sample Notes
                </button>
            </div>
        </div>
    }
    else
    {
        <div class="table-responsive">
            <table class="chrono-table">
                <thead>
                    <tr>
                        <th style="width: 25%;">Card Name (Primary Key)</th>
                        <th>Note Content</th>
                        <th style="width: 140px;" class="text-end">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    @foreach (var note in notes)
                    {
                        <tr>
                            <td>
                                <div class="fw-semibold text-white d-flex align-items-center gap-2">
                                    <i class="bi bi-card-heading text-primary"></i>
                                    @note.CardName
                                </div>
                            </td>
                            <td>
                                <div class="text-light text-break">@note.Note</div>
                            </td>
                            <td class="text-end">
                                <div class="btn-group btn-group-sm">
                                    <button class="btn btn-chrono-secondary" @onclick="() => OpenEditModal(note)" title="Edit Note">
                                        <i class="bi bi-pencil-fill"></i>
                                    </button>
                                    <button class="btn btn-chrono-danger" @onclick="() => OpenDeleteModal(note)" title="Delete Note">
                                        <i class="bi bi-trash3-fill"></i>
                                    </button>
                                </div>
                            </td>
                        </tr>
                    }
                </tbody>
            </table>
        </div>
    }
</div>

<!-- Add / Edit Modal -->
@if (showModal)
{
    <div class="modal-backdrop-custom">
        <div class="modal-dialog-custom">
            <div class="modal-header-custom">
                <h5 class="modal-title-custom">
                    <i class="bi @(isEditing ? "bi-pencil-square" : "bi-plus-circle") text-primary me-2"></i>
                    @(isEditing ? "Edit Card Note" : "Add New Card Note")
                </h5>
                <button type="button" class="btn-close btn-close-white" @onclick="CloseModal"></button>
            </div>
            <div class="modal-body-custom">
                <div class="mb-3">
                    <label class="form-label text-secondary small fw-bold">CARD NAME</label>
                    @if (isEditing)
                    {
                        <input type="text" class="form-control form-control-chrono" value="@currentNote.CardName" disabled />
                        <div class="form-text text-secondary">Card name acts as the primary key and cannot be altered.</div>
                    }
                    else
                    {
                        <input type="text" class="form-control form-control-chrono" list="cardSuggestions"
                               placeholder="Enter or select card name..." @bind="currentNote.CardName" />
                        <datalist id="cardSuggestions">
                            @foreach (var c in availableCardNames.Take(50))
                            {
                                <option value="@c" />
                            }
                        </datalist>
                        <div class="form-text text-secondary">Select an existing card from the database or enter a custom name.</div>
                    }
                </div>

                <div class="mb-3">
                    <label class="form-label text-secondary small fw-bold">STRATEGIC NOTE</label>
                    <textarea class="form-control form-control-chrono" rows="5"
                              placeholder="Enter strategic card observations, deck synergies, mulligan advice, or balancing notes..."
                              @bind="currentNote.Note"></textarea>
                </div>
            </div>
            <div class="modal-footer-custom">
                <button type="button" class="btn btn-chrono-secondary" @onclick="CloseModal">Cancel</button>
                <button type="button" class="btn btn-chrono-primary" @onclick="SaveNoteAsync" disabled="@isSaving">
                    @(isSaving ? "Saving..." : "Save Note")
                </button>
            </div>
        </div>
    </div>
}

<!-- Delete Confirmation Modal -->
@if (showDeleteModal && noteToDelete != null)
{
    <div class="modal-backdrop-custom">
        <div class="modal-dialog-custom" style="max-width: 450px;">
            <div class="modal-header-custom">
                <h5 class="modal-title-custom text-danger">
                    <i class="bi bi-exclamation-triangle-fill me-2"></i>
                    Confirm Delete Note
                </h5>
                <button type="button" class="btn-close btn-close-white" @onclick="() => showDeleteModal = false"></button>
            </div>
            <div class="modal-body-custom">
                <p class="text-white mb-2">Are you sure you want to delete the note for:</p>
                <div class="p-2 rounded bg-dark border border-secondary fw-bold text-primary mb-3">
                    @noteToDelete.CardName
                </div>
                <p class="text-secondary small mb-0">This action will remove the record from the database permanently.</p>
            </div>
            <div class="modal-footer-custom">
                <button type="button" class="btn btn-chrono-secondary" @onclick="() => showDeleteModal = false">Cancel</button>
                <button type="button" class="btn btn-chrono-danger" @onclick="ConfirmDeleteAsync" disabled="@isSaving">
                    @(isSaving ? "Deleting..." : "Delete Permanently")
                </button>
            </div>
        </div>
    </div>
}

@code {
    private List<CardNote> notes = [];
    private List<string> availableCardNames = [];
    private string searchTerm = "";
    private bool isLoading = true;
    private bool isSaving = false;
    private string? alertMessage;
    private bool alertIsSuccess;

    private bool showModal;
    private bool isEditing;
    private CardNote currentNote = new();

    private bool showDeleteModal;
    private CardNote? noteToDelete;

    protected override async Task OnInitializedAsync()
    {
        ConfigService.OnConfigurationChanged += HandleConfigChanged;
        
        try
        {
            availableCardNames = CardDatabase.Cards
                .Select(c => c.Name)
                .Where(n => !string.IsNullOrWhiteSpace(n))
                .Distinct()
                .OrderBy(n => n)
                .ToList();
        }
        catch
        {
            availableCardNames = [];
        }

        await LoadNotesAsync();
    }

    private void HandleConfigChanged()
    {
        _ = LoadNotesAsync();
    }

    private async Task LoadNotesAsync()
    {
        isLoading = true;
        try
        {
            notes = await DbService.GetCardNotesAsync(searchTerm);
        }
        catch (Exception ex)
        {
            alertIsSuccess = false;
            alertMessage = "Error loading card notes: " + ex.Message;
        }
        finally
        {
            isLoading = false;
        }
    }

    private async Task FilterNotes()
    {
        notes = await DbService.GetCardNotesAsync(searchTerm);
    }

    private async Task ClearSearch()
    {
        searchTerm = "";
        await LoadNotesAsync();
    }

    private void OpenAddModal()
    {
        isEditing = false;
        currentNote = new CardNote();
        showModal = true;
    }

    private void OpenEditModal(CardNote note)
    {
        isEditing = true;
        currentNote = new CardNote
        {
            CardName = note.CardName,
            Note = note.Note
        };
        showModal = true;
    }

    private void CloseModal()
    {
        showModal = false;
    }

    private async Task SaveNoteAsync()
    {
        if (string.IsNullOrWhiteSpace(currentNote.CardName))
        {
            alertIsSuccess = false;
            alertMessage = "Card name cannot be empty.";
            return;
        }

        isSaving = true;
        var result = await DbService.SaveCardNoteAsync(currentNote, !isEditing);
        isSaving = false;

        alertIsSuccess = result.Success;
        alertMessage = result.Message;

        if (result.Success)
        {
            showModal = false;
            await LoadNotesAsync();
        }
    }

    private void OpenDeleteModal(CardNote note)
    {
        noteToDelete = note;
        showDeleteModal = true;
    }

    private async Task ConfirmDeleteAsync()
    {
        if (noteToDelete == null) return;

        isSaving = true;
        var result = await DbService.DeleteCardNoteAsync(noteToDelete.CardName);
        isSaving = false;

        alertIsSuccess = result.Success;
        alertMessage = result.Message;
        showDeleteModal = false;
        noteToDelete = null;

        await LoadNotesAsync();
    }

    private async Task SeedSampleNotesAsync()
    {
        var result = await DbService.SeedSampleDataAsync();
        alertIsSuccess = result.Success;
        alertMessage = result.Message;
        await LoadNotesAsync();
    }

    public void Dispose()
    {
        ConfigService.OnConfigurationChanged -= HandleConfigChanged;
    }
}