using System.Security.Claims;
using Data.SeaHavenIndustries;
using FluentAssertions;
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);
    }
}