@page "/rewards"
@using LibraryManagement.Shared.Models
@using BlazorWebAssembly.Services
@inject LibraryApiClient ApiClient
@inject NavigationManager Navigation
@inject IJSRuntime JS

<div class="max-w-6xl mx-auto py-12 px-6">
    <!-- Header -->
    <div class="text-center mb-16">
        <h1 class="text-5xl font-black tracking-tight text-main mb-4">Loyalty Rewards</h1>
        <p class="text-lg text-muted max-w-2xl mx-auto">
            Your points are your power. Exchange them for exclusive memberships and reading perks.
        </p>
    </div>

    @if (_isLoading)
    {
        <div class="flex justify-center py-20">
            <div class="w-12 h-12 border-4 border-primary border-t-transparent rounded-full animate-spin"></div>
        </div>
    }
    else
    {
        <!-- Account Status Card -->
        <div class="bg-card rounded-2xl border border-border p-10 mb-16 flex flex-col md:flex-row items-center justify-between gap-8 shadow-sm">
            <div>
                <p class="text-sm font-bold text-muted uppercase tracking-widest mb-1">Your Balance</p>
                <div class="flex items-baseline gap-2">
                    <h2 class="text-6xl font-black text-main">@(_account?.CurrentBalance ?? 0)</h2>
                    <span class="text-xl font-bold text-primary">POINTS</span>
                </div>
            </div>
            <div class="h-16 w-px bg-border hidden md:block"></div>
            <div class="text-center md:text-left">
                <p class="text-sm font-medium text-muted mb-2">Member Tier</p>
                <p class="text-xl font-bold text-main">@(_account?.Tier ?? "Member")</p>
            </div>
            <button class="bg-primary text-white px-10 py-4 rounded-xl font-black hover:bg-primary-hover transition-all transform hover:scale-105 shadow-lg shadow-primary/20">
                How it works
            </button>
        </div>

        <!-- Rewards Grid -->
        <div class="grid grid-cols-1 md:grid-cols-2 gap-8">
            @foreach (var reward in _rewards)
            {
                <div class="bg-card rounded-2xl border border-border p-8 flex flex-col hover:border-primary transition-all group">
                    <div class="flex justify-between items-start mb-6">
                        <div class="w-14 h-14 bg-body rounded-xl flex items-center justify-center border border-border group-hover:bg-primary/5 transition-colors">
                            <svg class="w-8 h-8 text-primary" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 8v13m0-13V6a2 2 0 112 2h-2zm0 0V5.5A2.5 2.5 0 109.5 8H12zm-7 4h14M5 12a2 2 0 110-4h14a2 2 0 110 4M5 12v7a2 2 0 002 2h10a2 2 0 002-2v-7"></path></svg>
                        </div>
                        <span class="bg-primary/10 text-primary px-4 py-1 rounded-full text-sm font-black">@reward.PointCost pts</span>
                    </div>
                    
                    <h3 class="text-2xl font-bold text-main mb-2">@reward.Name</h3>
                    <p class="text-muted leading-relaxed mb-8 flex-grow">@reward.Description</p>
                    
                    <button @onclick="() => ClaimAsync(reward)" 
                            disabled="@((_account?.CurrentBalance ?? 0) < reward.PointCost)"
                            class='w-full py-4 rounded-xl font-bold transition-all @((_account?.CurrentBalance ?? 0) >= reward.PointCost ? "bg-primary text-white hover:bg-hover shadow-lg shadow-primary/20" : "bg-body text-muted cursor-not-allowed border border-border")'>
                        @((_account?.CurrentBalance ?? 0) >= reward.PointCost ? "Claim Reward" : "Insufficient Points")
                    </button>
                </div>
            }
        </div>
    }
</div>

@code {
    private bool _isLoading = true;
    private LoyaltyAccountDto? _account;
    private List<LoyaltyRewardDto> _rewards = new();

    protected override async Task OnInitializedAsync()
    {
        await LoadData();
    }

    private async Task LoadData()
    {
        _isLoading = true;
        try
        {
            _account = await ApiClient.GetMyLoyaltyAccountAsync();
            _rewards = (await ApiClient.GetActiveRewardsAsync()).ToList();
        }
        catch { }
        finally { _isLoading = false; }
    }

    private async Task ClaimAsync(LoyaltyRewardDto reward)
    {
        var (success, msg) = await ApiClient.ClaimRewardAsync(reward.Id);
        if (success)
        {
            await LoadData();
            await JS.InvokeVoidAsync("alert", msg);
        }
        else
        {
            await JS.InvokeVoidAsync("alert", msg);
        }
    }
}