using System.Net;
using System.Net.Http.Json;
using YesChef.Api.Entities;
using YesChef.Api.Features.Families;
using YesChef.Api.IntegrationTests.Infrastructure;

namespace YesChef.Api.IntegrationTests.Features;

public class FamilyEndpointsTests : AuthenticatedIntegrationTest
{
    // The default registered user is the first member of the bootstrap family
    // and therefore the admin. Tests that need a non-admin register a second
    // user via the same invite code to get a Member.

    [Test]
    public async Task First_registrant_is_admin()
    {
        var family = await Client.GetFromJsonAsync<FamilyEndpoints.FamilyDto>("/api/family");

        await Assert.That(family!.MyRole).IsEqualTo("Admin");
        await Assert.That(family.Members.Count).IsEqualTo(1);
        await Assert.That(family.Members[0].Role).IsEqualTo("Admin");
    }

    [Test]
    public async Task Second_registrant_is_member()
    {
        using var second = await Data.RegisterAsync("second-user");

        var family = await second.Client.GetFromJsonAsync<FamilyEndpoints.FamilyDto>("/api/family");

        await Assert.That(family!.MyRole).IsEqualTo("Member");
        await Assert.That(family.Members.Count).IsEqualTo(2);
    }

    [Test]
    public async Task Get_family_hides_invite_code_from_members()
    {
        using var member = await Data.RegisterAsync("member");

        var asAdmin = await Client.GetFromJsonAsync<FamilyEndpoints.FamilyDto>("/api/family");
        var asMember = await member.Client.GetFromJsonAsync<FamilyEndpoints.FamilyDto>("/api/family");

        await Assert.That(asAdmin!.InviteCode).IsNotNull();
        await Assert.That(asMember!.InviteCode).IsNull();
    }

    [Test]
    public async Task Regenerate_invite_code_replaces_code_and_returns_new_one()
    {
        var beforeCode = await UseDbAsync(db => db.Families.Select(f => f.InviteCode).FirstAsync());

        var response = await Client.PostAsync("/api/family/invite-code/regenerate", content: null);

        await Assert.That(response.StatusCode).IsEqualTo(HttpStatusCode.OK);
        var body = await response.Content.ReadFromJsonAsync<FamilyEndpoints.InviteCodeResponse>();
        await Assert.That(body!.InviteCode).IsNotEqualTo(beforeCode);
        await Assert.That(body.InviteCode.Length).IsEqualTo(10);
        var afterCode = await UseDbAsync(db => db.Families.Select(f => f.InviteCode).FirstAsync());
        await Assert.That(afterCode).IsEqualTo(body.InviteCode);
    }

    [Test]
    public async Task Regenerate_invite_code_forbidden_for_member()
    {
        using var member = await Data.RegisterAsync("member");

        var response = await member.Client.PostAsync("/api/family/invite-code/regenerate", content: null);

        await Assert.That(response.StatusCode).IsEqualTo(HttpStatusCode.Forbidden);
    }

    [Test]
    public async Task Update_role_promotes_member_to_admin()
    {
        using var member = await Data.RegisterAsync("member");
        var memberId = await UseDbAsync(db => db.Users.Where(u => u.Name == "member").Select(u => u.Id).SingleAsync());

        var response = await Client.PutAsJsonAsync($"/api/family/members/{memberId}/role",
            new FamilyEndpoints.UpdateRoleRequest("Admin"));

        await Assert.That(response.StatusCode).IsEqualTo(HttpStatusCode.NoContent);
        var role = await UseDbAsync(db => db.FamilyMemberships
            .Where(m => m.UserId == memberId).Select(m => m.Role).SingleAsync());
        await Assert.That(role).IsEqualTo(FamilyRole.Admin);
    }

    [Test]
    public async Task Update_role_blocks_demoting_last_admin()
    {
        var response = await Client.PutAsJsonAsync($"/api/family/members/{User.Id}/role",
            new FamilyEndpoints.UpdateRoleRequest("Member"));

        await Assert.That(response.StatusCode).IsEqualTo(HttpStatusCode.Conflict);
    }

    [Test]
    public async Task Update_role_allows_demoting_admin_when_other_admin_exists()
    {
        using var member = await Data.RegisterAsync("member");
        var memberId = await UseDbAsync(db => db.Users.Where(u => u.Name == "member").Select(u => u.Id).SingleAsync());
        // promote so we have two admins
        await Client.PutAsJsonAsync($"/api/family/members/{memberId}/role",
            new FamilyEndpoints.UpdateRoleRequest("Admin"));

        // demote self — should succeed because the other admin remains
        var response = await Client.PutAsJsonAsync($"/api/family/members/{User.Id}/role",
            new FamilyEndpoints.UpdateRoleRequest("Member"));

        await Assert.That(response.StatusCode).IsEqualTo(HttpStatusCode.NoContent);
    }

    [Test]
    public async Task Update_role_forbidden_for_member()
    {
        using var member = await Data.RegisterAsync("member");
        var memberId = await UseDbAsync(db => db.Users.Where(u => u.Name == "member").Select(u => u.Id).SingleAsync());

        var response = await member.Client.PutAsJsonAsync($"/api/family/members/{memberId}/role",
            new FamilyEndpoints.UpdateRoleRequest("Admin"));

        await Assert.That(response.StatusCode).IsEqualTo(HttpStatusCode.Forbidden);
    }

    [Test]
    public async Task Remove_member_deletes_membership()
    {
        using var member = await Data.RegisterAsync("member");
        var memberId = await UseDbAsync(db => db.Users.Where(u => u.Name == "member").Select(u => u.Id).SingleAsync());

        var response = await Client.DeleteAsync($"/api/family/members/{memberId}");

        await Assert.That(response.StatusCode).IsEqualTo(HttpStatusCode.NoContent);
        var stillMember = await UseDbAsync(db => db.FamilyMemberships.AnyAsync(m => m.UserId == memberId));
        await Assert.That(stillMember).IsFalse();
    }

    [Test]
    public async Task Remove_member_revokes_their_token()
    {
        using var member = await Data.RegisterAsync("member");
        var memberId = await UseDbAsync(db => db.Users.Where(u => u.Name == "member").Select(u => u.Id).SingleAsync());

        var removal = await Client.DeleteAsync($"/api/family/members/{memberId}");
        await Assert.That(removal.StatusCode).IsEqualTo(HttpStatusCode.NoContent);

        // The kicked member's existing JWT must now be rejected.
        var meResponse = await member.Client.GetAsync("/api/auth/me");
        await Assert.That(meResponse.StatusCode).IsEqualTo(HttpStatusCode.Unauthorized);
    }

    [Test]
    public async Task Remove_self_returns_409()
    {
        var response = await Client.DeleteAsync($"/api/family/members/{User.Id}");

        await Assert.That(response.StatusCode).IsEqualTo(HttpStatusCode.Conflict);
    }

    [Test]
    public async Task Member_demoted_loses_admin_access_on_next_request()
    {
        // Promote a second user to admin, then have the original admin demote
        // them. The original admin's already-issued token should still work
        // (still admin); the demoted user's token should no longer pass the
        // admin policy on the next request.
        using var second = await Data.RegisterAsync("second");
        var secondId = await UseDbAsync(db => db.Users.Where(u => u.Name == "second").Select(u => u.Id).SingleAsync());
        await Client.PutAsJsonAsync($"/api/family/members/{secondId}/role",
            new FamilyEndpoints.UpdateRoleRequest("Admin"));

        // confirm second can now regenerate (admin-only)
        var asAdmin = await second.Client.PostAsync("/api/family/invite-code/regenerate", content: null);
        await Assert.That(asAdmin.StatusCode).IsEqualTo(HttpStatusCode.OK);

        // demote second
        var demote = await Client.PutAsJsonAsync($"/api/family/members/{secondId}/role",
            new FamilyEndpoints.UpdateRoleRequest("Member"));
        await Assert.That(demote.StatusCode).IsEqualTo(HttpStatusCode.NoContent);

        // second's same token now fails the admin policy
        var afterDemote = await second.Client.PostAsync("/api/family/invite-code/regenerate", content: null);
        await Assert.That(afterDemote.StatusCode).IsEqualTo(HttpStatusCode.Forbidden);
    }
}