@page "/ansible/inventory"
@using RackPeek.Domain.Resources.Desktops
@using RackPeek.Domain.UseCases.Ansible
@inject AnsibleInventoryGeneratorUseCase InventoryUseCase

<div class="border border-zinc-800 rounded p-4 bg-zinc-900 max-w-5xl mx-auto"
     data-testid="ansible-inventory-page">

    <div class="flex justify-between items-center mb-4">
        <div class="text-zinc-100 text-lg">
            Ansible Inventory Generator
        </div>

        <button class="text-sm bg-emerald-600 hover:bg-emerald-500 px-3 py-1 rounded text-white transition"
                data-testid="generate-inventory-button"
                @onclick="GenerateInventory">
            Generate
        </button>
    </div>

    <!-- Options -->
    <div class="grid grid-cols-1 md:grid-cols-2 gap-4 mb-6">

        <!-- Tags -->
        <div>
            <div class="text-zinc-400 mb-1">Group By Tags</div>
            <input class="w-full bg-zinc-800 text-zinc-200 p-2 rounded border border-zinc-700"
                   placeholder="prod, staging, dmz"
                   data-testid="group-by-tags-input"
                   @bind="_groupByTagsRaw" />
            <div class="text-xs text-zinc-500 mt-1">
                Comma-separated tag names
            </div>
        </div>

        <!-- Labels -->
        <div>
            <div class="text-zinc-400 mb-1">Group By Labels</div>
            <input class="w-full bg-zinc-800 text-zinc-200 p-2 rounded border border-zinc-700"
                   placeholder="env, site"
                   data-testid="group-by-labels-input"
                   @bind="_groupByLabelsRaw" />
            <div class="text-xs text-zinc-500 mt-1">
                Creates groups like env_prod, site_london
            </div>
        </div>

        <!-- Global Vars -->
        <div class="md:col-span-2">
            <div class="text-zinc-400 mb-1">Global Variables</div>
            <textarea class="w-full bg-zinc-800 text-zinc-200 p-2 rounded border border-zinc-700 font-mono text-sm"
                      rows="4"
                      placeholder="ansible_user=ansible&#10;ansible_python_interpreter=/usr/bin/python3"
                      data-testid="global-vars-input"
                      @bind="_globalVarsRaw">
            </textarea>
            <div class="text-xs text-zinc-500 mt-1">
                One per line: key=value
            </div>
        </div>
    </div>

    <!-- Errors / Warnings -->
    @if (_warnings.Any())
    {
        <div class="border border-red-700 bg-red-900/40 text-red-300 p-3 rounded mb-4"
             data-testid="inventory-warnings">
            <div class="font-semibold mb-1">Warnings</div>
            <ul class="list-disc ml-5 text-sm">
                @foreach (var warning in _warnings)
                {
                    <li>@warning</li>
                }
            </ul>
        </div>
    }

    <!-- Output -->
    <div>
        <div class="text-zinc-400 mb-1">Generated Inventory</div>
        <textarea class="w-full bg-black text-emerald-400 p-3 rounded border border-zinc-800 font-mono text-sm"
                  rows="18"
                  readonly
                  data-testid="inventory-output">
@_inventoryText
        </textarea>
    </div>

</div>

@code {

    private string _groupByTagsRaw = "prod, staging";
    private string _groupByLabelsRaw = "env, site";
    private string _globalVarsRaw =
@"ansible_user=ansible
ansible_python_interpreter=/usr/bin/python3";
    
    private string _inventoryText = string.Empty;
    private List<string> _warnings = new();

    private async Task GenerateInventory()
    {
        try
        {
            _warnings.Clear();
            _inventoryText = string.Empty;

            var options = new InventoryOptions
            {
                GroupByTags = ParseCsv(_groupByTagsRaw),
                GroupByLabelKeys = ParseCsv(_groupByLabelsRaw),
                GlobalVars = ParseGlobalVars(_globalVarsRaw)
            };

            var result = await InventoryUseCase.ExecuteAsync(options);
            if (result is null)
            {
                _warnings.Add("Inventory generation returned null.");
                return;
            }

            _inventoryText = result.InventoryText;
            _warnings = result.Warnings.ToList();
        }
        catch (Exception ex)
        {
            _warnings.Clear();
            _warnings.Add($"Unexpected error: {ex.Message}");
        }
    }

    private static IReadOnlyList<string> ParseCsv(string raw)
    {
        if (string.IsNullOrWhiteSpace(raw))
            return [];

        return raw.Split(',', StringSplitOptions.RemoveEmptyEntries)
                  .Select(x => x.Trim())
                  .Where(x => !string.IsNullOrWhiteSpace(x))
                  .ToArray();
    }

    private static IDictionary<string, string> ParseGlobalVars(string raw)
    {
        var dict = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);

        if (string.IsNullOrWhiteSpace(raw))
            return dict;

        var lines = raw.Split('\n', StringSplitOptions.RemoveEmptyEntries);

        foreach (var line in lines)
        {
            var trimmed = line.Trim();
            if (string.IsNullOrWhiteSpace(trimmed)) continue;

            var parts = trimmed.Split('=', 2);
            if (parts.Length != 2) continue;

            var key = parts[0].Trim();
            var value = parts[1].Trim();

            if (!string.IsNullOrWhiteSpace(key))
                dict[key] = value;
        }

        return dict;
    }
}