Initial commit

src/PowderCoating.Web/Controllers/SeedDataController.cs

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+using Microsoft.AspNetCore.Authorization;
+using PowderCoating.Shared.Constants;
+using Microsoft.AspNetCore.Mvc;
+using PowderCoating.Application.Interfaces;
+
+namespace PowderCoating.Web.Controllers;
+
+[Authorize(Policy = AppConstants.Policies.SuperAdminOnly)]
+public class SeedDataController : Controller
+{
+    private readonly ISeedDataService _seedDataService;
+    private readonly ILogger<SeedDataController> _logger;
+
+    public SeedDataController(
+        ISeedDataService seedDataService,
+        ILogger<SeedDataController> logger)
+    {
+        _seedDataService = seedDataService;
+        _logger = logger;
+    }
+
+    /// <summary>
+    /// Displays the Seed Data management page with a list of all companies. Seeding is intentionally NOT automatic on startup — it must be triggered manually here by a SuperAdmin to avoid polluting production databases.
+    /// </summary>
+    public async Task<IActionResult> Index()
+    {
+        var companies = await _seedDataService.GetCompaniesAsync();
+        return View(companies);
+    }
+
+    /// <summary>
+    /// Triggers system-level seeding (global data such as SuperAdmin accounts and dashboard tips). Warnings are stored in TempData as a pipe-delimited string to survive the redirect; they display on the Index view after the POST-Redirect-GET cycle.
+    /// </summary>
+    [HttpPost]
+    [ValidateAntiForgeryToken]
+    public async Task<IActionResult> SeedSystem()
+    {
+        try
+        {
+            var result = await _seedDataService.SeedSystemDataAsync();
+
+            if (result.Success)
+            {
+                TempData["SuccessMessage"] = result.Message;
+                TempData["SeedDetails"] = string.Join("|", result.Details);
+                TempData["ItemsSeeded"] = result.ItemsSeeded;
+
+                if (result.Warnings.Any())
+                {
+                    TempData["WarningMessage"] = $"{result.ItemsSkipped} item(s) were skipped";
+                    TempData["SeedWarnings"] = string.Join("|", result.Warnings);
+                }
+            }
+            else
+            {
+                TempData["ErrorMessage"] = result.Message;
+            }
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Error seeding system data");
+            TempData["ErrorMessage"] = $"An error occurred: {ex.Message}";
+        }
+
+        return RedirectToAction(nameof(Index));
+    }
+
+    /// <summary>
+    /// Seeds demo data (customers, jobs, quotes, inventory, etc.) for a specific company. Warnings are capped at 30 entries in TempData to stay within the 4 KB browser cookie limit; any overflow is noted with a count and a pointer to the server logs.
+    /// </summary>
+    [HttpPost]
+    [ValidateAntiForgeryToken]
+    public async Task<IActionResult> SeedCompany(int companyId)
+    {
+        try
+        {
+            var result = await _seedDataService.SeedCompanyDataAsync(companyId);
+
+            if (result.Success)
+            {
+                TempData["SuccessMessage"] = result.Message;
+                TempData["SeedDetails"] = string.Join("|", result.Details);
+                TempData["ItemsSeeded"] = result.ItemsSeeded;
+
+                if (result.Warnings.Any())
+                {
+                    TempData["WarningMessage"] = $"{result.ItemsSkipped} item(s) were skipped";
+                    // Cap at 30 warnings to keep the TempData cookie under the 4 KB browser limit
+                    var displayWarnings = result.Warnings.Take(30).ToList();
+                    if (result.Warnings.Count > 30)
+                        displayWarnings.Add($"… and {result.Warnings.Count - 30} more (see logs)");
+                    TempData["SeedWarnings"] = string.Join("|", displayWarnings);
+                }
+            }
+            else
+            {
+                TempData["ErrorMessage"] = result.Message;
+            }
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Error seeding company data");
+            TempData["ErrorMessage"] = $"An error occurred: {ex.Message}";
+        }
+
+        return RedirectToAction(nameof(Index));
+    }
+
+    /// <summary>
+    /// Removes previously seeded demo data from a company according to the supplied options (e.g., jobs only, or all data). Used during QA/demo resets to return a company to a clean state without a full database drop.
+    /// </summary>
+    [HttpPost]
+    [ValidateAntiForgeryToken]
+    public async Task<IActionResult> RemoveSeedData(int companyId, RemoveSeedDataOptions options)
+    {
+        try
+        {
+            var result = await _seedDataService.RemoveSeedDataAsync(companyId, options);
+
+            if (result.Success)
+            {
+                TempData["SuccessMessage"] = result.Message;
+                TempData["SeedDetails"] = string.Join("|", result.Details);
+                TempData["ItemsSeeded"] = result.ItemsSeeded;
+            }
+            else
+            {
+                TempData["ErrorMessage"] = result.Message;
+            }
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Error removing seed data for company {CompanyId}", companyId);
+            TempData["ErrorMessage"] = $"An error occurred: {ex.Message}";
+        }
+
+        return RedirectToAction(nameof(Index));
+    }
+}