using Microsoft.EntityFrameworkCore;
using PowderCoating.Core.Interfaces.Services;
using PowderCoating.Infrastructure.Data;

namespace PowderCoating.Infrastructure.Services;

/// <summary>
/// Implements <see cref="ICompanyDataPurgeService"/> via bulk <c>ExecuteDeleteAsync</c> against
/// <see cref="ApplicationDbContext"/> directly.  This is an intentional exception to the
/// IUnitOfWork pattern — identical to the rationale for <c>DataPurgeController</c> in the
/// documented permanent exceptions list.  Each <c>ExecuteDeleteAsync</c> call commits immediately
/// at the database level so no <c>SaveChangesAsync</c> is needed for the bulk tiers.
/// </summary>
public class CompanyDataPurgeService : ICompanyDataPurgeService
{
    private readonly ApplicationDbContext _context;

    public CompanyDataPurgeService(ApplicationDbContext context)
    {
        _context = context;
    }

    /// <inheritdoc/>
    public async Task DeleteAllBusinessDataAsync(int companyId, IReadOnlyList<string> companyUserIds)
    {
        // ── Tier 1: Leaf children ─────────────────────────────────────────────
        await _context.JobItemPrepServices.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.JobItemCoats.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.QuoteItemPrepServices.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.QuoteItemCoats.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();

        // Announcement dismissals referencing the company's users or company-targeted announcements
        var announcementIds = await _context.Announcements
            .Where(a => a.TargetCompanyId == companyId).Select(a => a.Id).ToListAsync();
        await _context.AnnouncementDismissals.IgnoreQueryFilters()
            .Where(x => companyUserIds.Contains(x.UserId) || announcementIds.Contains(x.AnnouncementId))
            .ExecuteDeleteAsync();

        // ── Tier 2: Mid-level children ────────────────────────────────────────
        await _context.JobItems.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.QuoteItems.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.JobStatusHistory.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.JobChangeHistories.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.JobPhotos.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.JobNotes.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.JobDailyPriorities.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.QuoteChangeHistories.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.CustomerNotes.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.InventoryTransactions.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.MaintenanceRecords.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.BillLineItems.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.BillPayments.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Payments.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.InvoiceItems.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.JobPrepServices.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.QuotePrepServices.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();

        // ── Tier 3: Top-level company entities ───────────────────────────────
        await _context.Invoices.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Appointments.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Jobs.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Quotes.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Customers.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Bills.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Expenses.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Vendors.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.InventoryItems.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Equipment.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.OvenCosts.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.CatalogItems.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Accounts.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.NotificationLogs.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.NotificationTemplates.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Announcements.Where(x => x.TargetCompanyId == companyId).ExecuteDeleteAsync();
        await _context.BugReports.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.PrepServices.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();

        // ── Tier 4: Company configs and lookup tables ─────────────────────────
        await _context.CatalogCategories.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.InventoryCategoryLookups.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.JobStatusLookups.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.JobPriorityLookups.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.QuoteStatusLookups.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.AppointmentStatusLookups.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.AppointmentTypeLookups.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.PricingTiers.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.CompanyOperatingCosts.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.CompanyPreferences.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        // Note: company record and users are left for the caller to handle via UserManager and UnitOfWork
    }

    /// <inheritdoc/>
    public async Task ResetBusinessDataAsync(int companyId)
    {
        // ── Tier 0: Grandchildren ─────────────────────────────────────────────
        await _context.JobTemplateItemPrepServices.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.JobTemplateItemCoats.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.JobItemPrepServices.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.JobItemCoats.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.QuoteItemPrepServices.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.QuoteItemCoats.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.GiftCertificateRedemptions.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.CreditMemoApplications.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.OvenBatchItems.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();

        var announcementIds = await _context.Announcements
            .Where(a => a.TargetCompanyId == companyId).Select(a => a.Id).ToListAsync();
        if (announcementIds.Count > 0)
            await _context.AnnouncementDismissals.IgnoreQueryFilters()
                .Where(x => announcementIds.Contains(x.AnnouncementId))
                .ExecuteDeleteAsync();

        // ── Tier 1: Children ──────────────────────────────────────────────────
        await _context.JobTemplateItems.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.JobItems.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.QuoteItems.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.JobStatusHistory.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.JobChangeHistories.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.JobPhotos.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.JobNotes.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.JobDailyPriorities.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.JobTimeEntries.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.JobPrepServices.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.ReworkRecords.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.QuoteChangeHistories.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.QuotePrepServices.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.QuotePhotos.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.CustomerNotes.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.InventoryTransactions.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.MaintenanceRecords.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.BillLineItems.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.BillPayments.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Payments.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Deposits.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.InvoiceItems.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.PurchaseOrderItems.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.AiItemPredictions.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.PowderUsageLogs.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.OvenBatches.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Refunds.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.CreditMemos.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.GiftCertificates.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();

        // ── Tier 2: Top-level business entities ──────────────────────────────
        await _context.Invoices.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Appointments.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Jobs.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.JobTemplates.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Quotes.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Customers.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Bills.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.PurchaseOrders.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Expenses.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Vendors.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.CatalogItems.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.InventoryItems.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Equipment.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.OvenCosts.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Accounts.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.NotificationLogs.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.PrepServices.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.CatalogCategories.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.InventoryCategoryLookups.IgnoreQueryFilters().Where(x => x.CompanyId == companyId).ExecuteDeleteAsync();
        await _context.Announcements.Where(x => x.TargetCompanyId == companyId).ExecuteDeleteAsync();

        // Clear QuickBooks migration wizard progress (tracked update, not bulk delete)
        var prefs = await _context.CompanyPreferences
            .IgnoreQueryFilters()
            .FirstOrDefaultAsync(p => p.CompanyId == companyId);
        if (prefs?.QbMigrationStateJson != null)
        {
            prefs.QbMigrationStateJson = null;
            prefs.UpdatedAt = DateTime.UtcNow;
            await _context.SaveChangesAsync();
        }
    }
}