using System.Security.Claims;
using Data.SeaHavenIndustries;
using FluentAssertions;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using SeaHaven.DataServices.Implementation;
using SeaHaven.Services.Exceptions;
using SeaHaven.Services.DTOs;
using SeaHaven.Services.Helpers;
using SeaHaven.Services.Implementation;
using Xunit;

namespace Api.SeaHavenIndustries.Tests;

public class DashboardServiceTests
{
    private static ApplicationDbContext NewContext()
    {
        var options = new DbContextOptionsBuilder<ApplicationDbContext>()
            .UseInMemoryDatabase(databaseName: Guid.NewGuid().ToString())
            .Options;
        return new ApplicationDbContext(options);
    }

    private static DashboardService NewService(ApplicationDbContext ctx)
    {
        var resolver = new WorkOrderAccountResolver(
            new AccountDataService(ctx),
            new LocationDataService(ctx));
        return new DashboardService(new DashboardDataService(ctx), resolver);
    }

    private static ClaimsPrincipal AccountUser(
        int accountId,
        string userId = "dispatcher-1",
        string role = "Admin")
    {
        var claims = new[]
        {
            new Claim(SeaHavenClaimTypes.AccountId, accountId.ToString()),
            new Claim(ClaimTypes.NameIdentifier, userId),
            new Claim(ClaimTypes.Role, role)
        };
        return new ClaimsPrincipal(new ClaimsIdentity(claims, "test"));
    }

    private static ClaimsPrincipal OrgWideUser()
    {
        var claims = new[]
        {
            new Claim(SeaHavenClaimTypes.OrgScope, SeaHavenClaimTypes.OrgScopeAll),
            new Claim(ClaimTypes.Role, "Admin")
        };
        return new ClaimsPrincipal(new ClaimsIdentity(claims, "test"));
    }

    [Fact]
    public async Task GetStatsAsync_CountsByStatusExcludingTemplates()
    {
        using var ctx = NewContext();
        ctx.workOrders.AddRange(
            new WorkOrder { AccountId = 1, Status = "Open", istemplate = false },
            new WorkOrder { AccountId = 1, Status = "Open", istemplate = false, AssignTo = "u1" },
            new WorkOrder { AccountId = 1, Status = "In Progress" },
            new WorkOrder { AccountId = 1, Status = "On Hold" },
            new WorkOrder { AccountId = 1, Status = "Done" },
            new WorkOrder { AccountId = 1, Status = "Done" },
            new WorkOrder { AccountId = 1, Status = "Open", istemplate = true },
            new WorkOrder { AccountId = 1, Status = "Cancelled" },
            new WorkOrder { AccountId = 2, Status = "Open" },
            new WorkOrder { Status = "Open" }
        );
        ctx.SaveChanges();

        var stats = await NewService(ctx).GetStatsAsync(
            AccountUser(1), new DashboardStatsQueryDTO(), CancellationToken.None);

        stats.Total.Should().Be(7);
        stats.Open.Should().Be(4);
        stats.NotDispatched.Should().Be(1);
        stats.Completed.Should().Be(2);
    }

    [Fact]
    public async Task GetStatsAsync_OrgWideUserSeesAllNonTemplateOrders()
    {
        using var ctx = NewContext();
        ctx.workOrders.AddRange(
            new WorkOrder { AccountId = 1, Status = "Open" },
            new WorkOrder { AccountId = 2, Status = "Done" },
            new WorkOrder { Status = "Open", istemplate = true });
        ctx.SaveChanges();

        var stats = await NewService(ctx).GetStatsAsync(
            OrgWideUser(), new DashboardStatsQueryDTO(), CancellationToken.None);

        stats.Total.Should().Be(2);
        stats.Open.Should().Be(1);
        stats.Completed.Should().Be(1);
    }

    [Fact]
    public async Task GetStatsAsync_MissingScopeFailsClosed()
    {
        using var ctx = NewContext();
        var user = new ClaimsPrincipal(new ClaimsIdentity(new[]
        {
            new Claim(ClaimTypes.Role, "Dispatcher")
        }, "test"));

        var act = () => NewService(ctx).GetStatsAsync(
            user, new DashboardStatsQueryDTO(), CancellationToken.None);

        var exception = await act.Should().ThrowAsync<WorkOrderBoardValidationException>();

        exception.Which.Code.Should().Be("Forbidden");
    }

    [Fact]
    public async Task GetStatsAsync_UsesDashboardMetricRulesForDateRange()
    {
        using var ctx = NewContext();
        var today = DashboardBusinessTime.Today();
        ctx.workOrders.AddRange(
            new WorkOrder
            {
                AccountId = 1,
                WorkOrderType = Data.SeaHavenIndustries.Enums.WorkOrderType.PM,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled,
                ScheduledDate = today.ToDateTime(TimeOnly.MinValue),
                OriginalDate = today.AddDays(-6)
            },
            new WorkOrder
            {
                AccountId = 1,
                WorkOrderType = Data.SeaHavenIndustries.Enums.WorkOrderType.Emergency,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.InProgress,
                ScheduledDate = today.AddDays(-3).ToDateTime(TimeOnly.MinValue)
            },
            new WorkOrder
            {
                AccountId = 1,
                WorkOrderType = Data.SeaHavenIndustries.Enums.WorkOrderType.Reactive,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Completed,
                ScheduledDate = today.ToDateTime(TimeOnly.MinValue),
                OriginalDate = today.AddDays(-15),
                CompletedDate = today.AddDays(-12).ToDateTime(TimeOnly.MinValue)
            },
            new WorkOrder
            {
                AccountId = 1,
                WorkOrderType = Data.SeaHavenIndustries.Enums.WorkOrderType.PM,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Incomplete,
                ScheduledDate = today.AddDays(4).ToDateTime(TimeOnly.MinValue)
            });
        ctx.SaveChanges();

        var query = new DashboardStatsQueryDTO
        {
            DateFrom = today.AddDays(-10),
            DateTo = today.AddDays(10)
        };
        var stats = await NewService(ctx).GetStatsAsync(
            AccountUser(1), query, CancellationToken.None);

        stats.Total.Should().Be(4);
        stats.Breakdown.Overdue.Should().Be(1);
        stats.Breakdown.Other.Should().Be(0);
        stats.Breakdown.PM.Should().Be(2);
        stats.Breakdown.Emergency.Should().Be(0);
        stats.Breakdown.Reactive.Should().Be(1);
        (stats.Breakdown.PM + stats.Breakdown.Emergency + stats.Breakdown.Reactive
            + stats.Breakdown.Overdue + stats.Breakdown.Other).Should().Be(stats.Total);
        stats.DueCount.Should().Be(3);
        stats.CompletedDueCount.Should().Be(1);
        stats.CompletionRate.Should().Be(33.33m);
        stats.AverageResolutionDays.Should().Be(3m);
    }

    [Fact]
    public async Task GetStatsAsync_DispatcherOnlySeesAssignedOrders()
    {
        using var ctx = NewContext();
        ctx.workOrders.AddRange(
            new WorkOrder { AccountId = 1, Status = "Open", AssignTo = "dispatcher-1" },
            new WorkOrder { AccountId = 1, Status = "Open", AssignTo = "dispatcher-2" });
        ctx.SaveChanges();

        var stats = await NewService(ctx).GetStatsAsync(
            AccountUser(1, role: "Dispatcher"), new DashboardStatsQueryDTO(), CancellationToken.None);

        stats.Total.Should().Be(1);
        stats.Open.Should().Be(1);
    }

    [Fact]
    public async Task GetWorkloadAsync_UsesRoleScopeAndExcludesTerminalOrdersFromOpenCount()
    {
        using var ctx = NewContext();
        ctx.Roles.Add(new IdentityRole
        {
            Id = "dispatcher-role",
            Name = "Dispatcher",
            NormalizedName = "DISPATCHER"
        });
        ctx.Users.AddRange(
            new ApplicationUser { Id = "dispatcher-1", FirstName = "Ada", LastName = "One" },
            new ApplicationUser { Id = "dispatcher-2", FirstName = "Ben", LastName = "Two" });
        ctx.UserRoles.AddRange(
            new IdentityUserRole<string> { UserId = "dispatcher-1", RoleId = "dispatcher-role" },
            new IdentityUserRole<string> { UserId = "dispatcher-2", RoleId = "dispatcher-role" });
        ctx.workOrders.AddRange(
            new WorkOrder { AccountId = 1, AssignTo = "dispatcher-1", Status = "Open" },
            new WorkOrder { AccountId = 1, AssignTo = "dispatcher-1", LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Completed },
            new WorkOrder { AccountId = 1, AssignTo = "dispatcher-2", Status = "Open" });
        ctx.SaveChanges();

        var result = await NewService(ctx).GetWorkloadAsync(
            AccountUser(1, "dispatcher-1", "Dispatcher"),
            new DashboardStatsQueryDTO(),
            1,
            CancellationToken.None);

        result.TotalDispatchers.Should().Be(1);
        result.Items.Should().ContainSingle();
        result.Items[0].DispatcherName.Should().Be("Ada One");
        result.Items[0].TotalCount.Should().Be(2);
        result.Items[0].OpenCount.Should().Be(1);
        result.PageSize.Should().Be(10);

        var adminResult = await NewService(ctx).GetWorkloadAsync(
            AccountUser(1),
            new DashboardStatsQueryDTO(),
            1,
            CancellationToken.None);

        adminResult.TotalDispatchers.Should().Be(2);
        adminResult.Items.Select(item => item.DispatcherName)
            .Should().ContainInOrder("Ada One", "Ben Two");

        var performance = await NewService(ctx).GetPerformanceAsync(
            AccountUser(1),
            new DashboardStatsQueryDTO(),
            1,
            CancellationToken.None);

        performance.TotalDispatchers.Should().Be(2);
        performance.Items[0].DispatcherName.Should().Be("Ada One");
    }

    [Fact]
    public async Task GetPerformanceAsync_UsesDueOnlyRateAndOriginalDateResolution()
    {
        using var ctx = NewContext();
        ctx.Roles.Add(new IdentityRole
        {
            Id = "dispatcher-role",
            Name = "Dispatcher",
            NormalizedName = "DISPATCHER"
        });
        ctx.Users.Add(new ApplicationUser
        {
            Id = "dispatcher-1",
            FirstName = "Ada",
            LastName = "One",
            Color = "#123456"
        });
        ctx.UserRoles.Add(new IdentityUserRole<string>
        {
            UserId = "dispatcher-1",
            RoleId = "dispatcher-role"
        });
        var today = DashboardBusinessTime.Today();
        ctx.workOrders.AddRange(
            new WorkOrder
            {
                AccountId = 1,
                AssignTo = "dispatcher-1",
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Completed,
                ScheduledDate = today.ToDateTime(TimeOnly.MinValue),
                OriginalDate = today.AddDays(-5),
                CompletedDate = today.AddDays(-2).ToDateTime(TimeOnly.MinValue)
            },
            new WorkOrder
            {
                AccountId = 1,
                AssignTo = "dispatcher-1",
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Scheduled,
                ScheduledDate = today.AddDays(3).ToDateTime(TimeOnly.MinValue)
            });
        ctx.SaveChanges();

        var result = await NewService(ctx).GetPerformanceAsync(
            AccountUser(1),
            new DashboardStatsQueryDTO(),
            1,
            CancellationToken.None);

        result.Items.Should().ContainSingle();
        result.Items[0].CompletionRate.Should().Be(100m);
        result.Items[0].AverageResolutionDays.Should().Be(3m);
        result.Items[0].Color.Should().Be("#123456");
    }

    [Fact]
    public async Task GetRegionsAsync_UsesCanonicalBucketsAndUnmappedOther()
    {
        await using var ctx = NewContext();
        ctx.Locations.AddRange(
            new Locations { Id = 1, State = "NY" },
            new Locations { Id = 2, State = "ca" },
            new Locations { Id = 3, State = "XX" });
        ctx.workOrders.AddRange(
            new WorkOrder { AccountId = 1, LocationId = 1 },
            new WorkOrder { AccountId = 1, LocationId = 2 },
            new WorkOrder { AccountId = 1, LocationId = 3 },
            new WorkOrder { AccountId = 1, LocationId = null });
        await ctx.SaveChangesAsync();

        var result = await NewService(ctx).GetRegionsAsync(
            AccountUser(1), new DashboardStatsQueryDTO(), CancellationToken.None);

        result.Items.Select(row => row.Region).Should().Equal(
            "East", "Central", "West", "California", "Unmapped/Other");
        result.Items.Select(row => row.WorkOrderCount).Should().Equal(1, 0, 0, 1, 2);
    }

    [Fact]
    public async Task GetVendorInsightsAsync_IsCompanyWideAndUsesVendorMetrics()
    {
        await using var ctx = NewContext();
        ctx.VendorCompanies.Add(new VendorCompany { Id = 10, Name = "Acme Services", IsDeleted = false });
        ctx.Vendors.Add(new Vendor
        {
            Id = 20,
            CompanyId = 10,
            IsActive = true,
            CompanyName = "Acme Services"
        });
        ctx.Dispatches.Add(new Dispatch { Id = 30, VendorId = 20 });
        ctx.workOrders.AddRange(
            new WorkOrder
            {
                AccountId = 1,
                PrimaryDispatchId = 30,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Completed,
                ScheduledDate = DateTime.UtcNow.Date.AddDays(-3),
                CompletedDate = DateTime.UtcNow.Date.AddDays(-1),
                RescheduleCount = 1
            },
            new WorkOrder
            {
                AccountId = 1,
                PrimaryDispatchId = 30,
                LifecycleStatus = Data.SeaHavenIndustries.Enums.LifecycleStatus.Completed,
                ScheduledDate = DateTime.UtcNow.Date.AddDays(-2),
                CompletedDate = DateTime.UtcNow.Date.AddDays(-1)
            });
        await ctx.SaveChangesAsync();

        var result = await NewService(ctx).GetVendorInsightsAsync(
            AccountUser(1), CancellationToken.None);

        result.TotalVendors.Should().Be(1);
        result.Items.Should().ContainSingle();
        result.Items[0].TotalJobs.Should().Be(2);
        result.Items[0].CompletionRate.Should().Be(100);
        result.Items[0].RescheduleRate.Should().Be(50);
    }
}