using System.Net;
using System.Net.Http.Json;
using Microsoft.Extensions.DependencyInjection;
using NeonSprawl.Server.Game.AbilityInput;
using NeonSprawl.Server.Game.Combat;
using NeonSprawl.Server.Game.Npc;
using NeonSprawl.Server.Game.PositionState;
using NeonSprawl.Server.Game.Targeting;
using NeonSprawl.Server.Tests;
using Xunit;

namespace NeonSprawl.Server.Tests.Game.Combat;

public sealed class PlayerCombatHealthApiTests
{
    private static async Task MoveDevPlayerNearEliteAsync(HttpClient client)
    {
        var response = await client.PostAsJsonAsync(
            "/game/players/dev-local-1/move",
            new MoveCommandRequest
            {
                SchemaVersion = MoveCommandRequest.CurrentSchemaVersion,
                Target = new PositionVector { X = -2, Y = 0.9, Z = -2 },
            });
        response.EnsureSuccessStatusCode();
    }

    private static async Task BindSlot0PulseAsync(HttpClient client)
    {
        var post = await client.PostAsJsonAsync(
            "/game/players/dev-local-1/hotbar-loadout",
            new HotbarLoadoutUpdateRequest
            {
                SchemaVersion = HotbarLoadoutUpdateRequest.CurrentSchemaVersion,
                Slots = [new HotbarSlotBindingJson { SlotIndex = 0, AbilityId = PrototypeAbilityRegistry.PrototypePulse }],
            });
        post.EnsureSuccessStatusCode();
    }

    private static async Task LockPrototypeNpcEliteAsync(HttpClient client)
    {
        var response = await client.PostAsJsonAsync(
            "/game/players/dev-local-1/target/select",
            new TargetSelectRequest
            {
                SchemaVersion = TargetSelectRequest.CurrentSchemaVersion,
                TargetId = PrototypeNpcRegistry.PrototypeNpcEliteId,
            });
        response.EnsureSuccessStatusCode();
    }

    private static AbilityCastRequest PulseCastRequest() =>
        new()
        {
            SchemaVersion = AbilityCastRequest.CurrentSchemaVersion,
            SlotIndex = 0,
            AbilityId = PrototypeAbilityRegistry.PrototypePulse,
            TargetId = PrototypeNpcRegistry.PrototypeNpcEliteId,
        };

    [Fact]
    public async Task GetPlayerCombatHealth_ShouldReturnSchemaV1_WithFullHpBaseline()
    {
        // Arrange
        await using var factory = new InMemoryWebApplicationFactory();
        var client = factory.CreateClient();
        // Act
        var response = await client.GetAsync("/game/players/dev-local-1/combat-health");
        // Assert
        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        var body = await response.Content.ReadFromJsonAsync<PlayerCombatHealthResponse>();
        Assert.NotNull(body);
        Assert.Equal(PlayerCombatHealthResponse.CurrentSchemaVersion, body!.SchemaVersion);
        Assert.Equal("dev-local-1", body.PlayerId);
        Assert.Equal(PlayerCombatHealthDefaults.MaxHp, body.MaxHp);
        Assert.Equal(PlayerCombatHealthDefaults.MaxHp, body.CurrentHp);
        Assert.False(body.Defeated);
    }

    [Fact]
    public async Task GetPlayerCombatHealth_ShouldReturnNotFound_WhenPlayerUnknown()
    {
        // Arrange
        await using var factory = new InMemoryWebApplicationFactory();
        var client = factory.CreateClient();
        // Act
        var response = await client.GetAsync("/game/players/missing-player/combat-health");
        // Assert
        Assert.Equal(HttpStatusCode.NotFound, response.StatusCode);
    }

    [Fact]
    public async Task GetPlayerCombatHealth_ShouldDecreaseAfterEliteTelegraphComplete()
    {
        // Arrange
        await using var factory = new InMemoryWebApplicationFactory();
        var client = factory.CreateClient();
        Assert.NotNull(factory.FakeClock);
        await BindSlot0PulseAsync(client);
        await MoveDevPlayerNearEliteAsync(client);
        await LockPrototypeNpcEliteAsync(client);
        var castResponse = await client.PostAsJsonAsync(
            "/game/players/dev-local-1/ability-cast",
            PulseCastRequest());
        castResponse.EnsureSuccessStatusCode();
        _ = await client.GetAsync("/game/world/npc-runtime-snapshot");
        factory.FakeClock!.Advance(TimeSpan.FromSeconds(5));
        _ = await client.GetAsync("/game/world/npc-runtime-snapshot");
        factory.FakeClock.Advance(TimeSpan.FromSeconds(2.5));
        // Act
        var snapshotResponse = await client.GetAsync("/game/world/npc-runtime-snapshot");
        var healthResponse = await client.GetAsync("/game/players/dev-local-1/combat-health");
        // Assert
        snapshotResponse.EnsureSuccessStatusCode();
        healthResponse.EnsureSuccessStatusCode();
        var snapshotBody = await snapshotResponse.Content.ReadFromJsonAsync<NpcRuntimeSnapshotResponse>();
        var healthBody = await healthResponse.Content.ReadFromJsonAsync<PlayerCombatHealthResponse>();
        Assert.NotNull(snapshotBody);
        Assert.NotNull(healthBody);
        var elite = snapshotBody!.NpcInstances.Single(row => row.NpcInstanceId == PrototypeNpcRegistry.PrototypeNpcEliteId);
        Assert.Equal("recover", elite.State);
        Assert.Equal(75, healthBody!.CurrentHp);
        Assert.False(healthBody.Defeated);
        Assert.Equal("dev-local-1", healthBody.PlayerId);

        var store = factory.Services.GetRequiredService<IPlayerCombatHealthStore>();
        store.TryGet("dev-local-1", out var storeSnapshot);
        Assert.Equal(healthBody.CurrentHp, storeSnapshot.CurrentHp);
        Assert.Equal(healthBody.MaxHp, storeSnapshot.MaxHp);
        Assert.Equal(healthBody.Defeated, storeSnapshot.Defeated);
    }
}