using foodmarket.Domain.Catalog;
using foodmarket.Domain.Organizations;
using foodmarket.Infrastructure.Identity;
using foodmarket.Infrastructure.Persistence;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;

namespace foodmarket.Api.Seed;

public class DevDataSeeder : IHostedService
{
    private readonly IServiceProvider _services;
    private readonly IHostEnvironment _env;

    public DevDataSeeder(IServiceProvider services, IHostEnvironment env)
    {
        _services = services;
        _env = env;
    }

    public async Task StartAsync(CancellationToken ct)
    {
        // Idempotent — runs in all envs to bootstrap a usable admin + demo org.
        // Once first real user/org is set up via UI, rename/disable demo.
        // (Wired regardless of env so stage/prod first-deploy lands a working
        //  admin, otherwise nobody can log in.)

        using var scope = _services.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
        var userMgr = scope.ServiceProvider.GetRequiredService<UserManager<User>>();
        var roleMgr = scope.ServiceProvider.GetRequiredService<RoleManager<Role>>();

        foreach (var role in new[] { SystemRoles.SuperAdmin, SystemRoles.Admin, SystemRoles.Manager, SystemRoles.Cashier, SystemRoles.Storekeeper })
        {
            if (!await roleMgr.RoleExistsAsync(role))
            {
                await roleMgr.CreateAsync(new Role { Name = role });
            }
        }

        var demoOrg = await db.Organizations.FirstOrDefaultAsync(o => o.Name == "Demo Market", ct);
        if (demoOrg is null)
        {
            demoOrg = new Organization
            {
                Name = "Demo Market",
                CountryCode = "KZ",
                Bin = "000000000000",
                Address = "Алматы, ул. Пример 1",
                Phone = "+7 (777) 000-00-00",
                Email = "demo@food-market.local"
            };
            db.Organizations.Add(demoOrg);
            await db.SaveChangesAsync(ct);
        }

        await SeedTenantReferencesAsync(db, demoOrg.Id, ct);

        const string adminEmail = "admin@food-market.local";
        var admin = await userMgr.FindByEmailAsync(adminEmail);
        if (admin is null)
        {
            admin = new User
            {
                UserName = adminEmail,
                Email = adminEmail,
                EmailConfirmed = true,
                FullName = "System Admin",
                OrganizationId = demoOrg.Id,
            };
            var result = await userMgr.CreateAsync(admin, "Admin12345!");
            if (result.Succeeded)
            {
                await userMgr.AddToRoleAsync(admin, SystemRoles.Admin);
            }
        }
    }

    private static async Task SeedTenantReferencesAsync(AppDbContext db, Guid orgId, CancellationToken ct)
    {
        var anyVat = await db.VatRates.IgnoreQueryFilters().AnyAsync(v => v.OrganizationId == orgId, ct);
        if (!anyVat)
        {
            db.VatRates.AddRange(
                new VatRate { OrganizationId = orgId, Name = "Без НДС", Percent = 0m, IsDefault = false },
                new VatRate { OrganizationId = orgId, Name = "НДС 12%", Percent = 12m, IsIncludedInPrice = true, IsDefault = true }
            );
        }

        var anyUnit = await db.UnitsOfMeasure.IgnoreQueryFilters().AnyAsync(u => u.OrganizationId == orgId, ct);
        if (!anyUnit)
        {
            db.UnitsOfMeasure.AddRange(
                new UnitOfMeasure { OrganizationId = orgId, Code = "796", Symbol = "шт", Name = "штука", DecimalPlaces = 0, IsBase = true },
                new UnitOfMeasure { OrganizationId = orgId, Code = "166", Symbol = "кг", Name = "килограмм", DecimalPlaces = 3 },
                new UnitOfMeasure { OrganizationId = orgId, Code = "112", Symbol = "л", Name = "литр", DecimalPlaces = 3 },
                new UnitOfMeasure { OrganizationId = orgId, Code = "006", Symbol = "м", Name = "метр", DecimalPlaces = 3 },
                new UnitOfMeasure { OrganizationId = orgId, Code = "625", Symbol = "уп", Name = "упаковка", DecimalPlaces = 0 }
            );
        }

        var anyPriceType = await db.PriceTypes.IgnoreQueryFilters().AnyAsync(p => p.OrganizationId == orgId, ct);
        if (!anyPriceType)
        {
            db.PriceTypes.AddRange(
                new PriceType { OrganizationId = orgId, Name = "Розничная", IsDefault = true, IsRetail = true, SortOrder = 1 },
                new PriceType { OrganizationId = orgId, Name = "Оптовая", SortOrder = 2 }
            );
        }

        var mainStore = await db.Stores.IgnoreQueryFilters().FirstOrDefaultAsync(s => s.OrganizationId == orgId && s.IsMain, ct);
        if (mainStore is null)
        {
            mainStore = new Store
            {
                OrganizationId = orgId,
                Name = "Основной склад",
                Code = "MAIN",
                Kind = StoreKind.Warehouse,
                IsMain = true,
                Address = "Алматы, ул. Пример 1",
            };
            db.Stores.Add(mainStore);
            await db.SaveChangesAsync(ct);
        }

        var anyRetail = await db.RetailPoints.IgnoreQueryFilters().AnyAsync(r => r.OrganizationId == orgId, ct);
        if (!anyRetail)
        {
            db.RetailPoints.Add(new RetailPoint
            {
                OrganizationId = orgId,
                Name = "Касса 1",
                Code = "POS-1",
                StoreId = mainStore.Id,
            });
        }

        await db.SaveChangesAsync(ct);
    }

    public Task StopAsync(CancellationToken ct) => Task.CompletedTask;
}