using OpenTheBox.Core;
using OpenTheBox.Core.Crafting;
using OpenTheBox.Core.Enums;
using OpenTheBox.Core.Items;
using OpenTheBox.Data;
using OpenTheBox.Rendering.Panels;
using OpenTheBox.Simulation;
using OpenTheBox.Simulation.Events;

namespace OpenTheBox.Tests;

// ══════════════════════════════════════════════════════════════════════════
//  CraftingEngine Tests
// ══════════════════════════════════════════════════════════════════════════

public class CraftingEngineTests
{
    private static ContentRegistry CreateRegistryWithRecipe(
        string recipeId = "refine_wood",
        WorkstationType station = WorkstationType.Foundry,
        string ingredientId = "material_wood_raw",
        int ingredientQty = 2,
        string resultId = "material_wood_refined",
        int resultQty = 1)
    {
        var registry = new ContentRegistry();

        registry.RegisterItem(new ItemDefinition(
            ingredientId, $"item.{ingredientId}", ItemCategory.Material, ItemRarity.Common,
            ["Material"], MaterialType: MaterialType.Wood, MaterialForm: MaterialForm.Raw));

        registry.RegisterItem(new ItemDefinition(
            resultId, $"item.{resultId}", ItemCategory.Material, ItemRarity.Common,
            ["Material"], MaterialType: MaterialType.Wood, MaterialForm: MaterialForm.Refined));

        registry.RegisterRecipe(new Recipe(
            recipeId, $"recipe.{recipeId}", station,
            [new RecipeIngredient(ingredientId, ingredientQty)],
            new RecipeResult(resultId, resultQty)));

        return registry;
    }

    private static GameState CreateState(bool craftingPanel = true, bool unlockFoundry = true)
    {
        var state = GameState.Create("Test", Locale.EN);
        if (craftingPanel)
            state.UnlockedUIFeatures.Add(UIFeature.CraftingPanel);
        if (unlockFoundry)
            state.UnlockedWorkstations.Add(WorkstationType.Foundry);
        return state;
    }

    // ── FindCraftableRecipes ──────────────────────────────────────────

    [Fact]
    public void FindCraftable_NoCraftingPanel_ReturnsEmpty()
    {
        var engine = new CraftingEngine();
        var registry = CreateRegistryWithRecipe();
        var state = CreateState(craftingPanel: false);
        state.AddItem(ItemInstance.Create("material_wood_raw", 2));

        var result = engine.FindCraftableRecipes(state, registry);

        Assert.Empty(result);
    }

    [Fact]
    public void FindCraftable_NoWorkstation_ReturnsEmpty()
    {
        var engine = new CraftingEngine();
        var registry = CreateRegistryWithRecipe();
        var state = CreateState(unlockFoundry: false);
        state.AddItem(ItemInstance.Create("material_wood_raw", 2));

        var result = engine.FindCraftableRecipes(state, registry);

        Assert.Empty(result);
    }

    [Fact]
    public void FindCraftable_InsufficientIngredients_ReturnsEmpty()
    {
        var engine = new CraftingEngine();
        var registry = CreateRegistryWithRecipe();
        var state = CreateState();
        state.AddItem(ItemInstance.Create("material_wood_raw", 1)); // Need 2

        var result = engine.FindCraftableRecipes(state, registry);

        Assert.Empty(result);
    }

    [Fact]
    public void FindCraftable_AllConditionsMet_ReturnsRecipe()
    {
        var engine = new CraftingEngine();
        var registry = CreateRegistryWithRecipe();
        var state = CreateState();
        state.AddItem(ItemInstance.Create("material_wood_raw", 2));

        var result = engine.FindCraftableRecipes(state, registry);

        Assert.Single(result);
        Assert.Equal("refine_wood", result[0].Id);
    }

    [Fact]
    public void FindCraftable_WorkstationBusy_ReturnsEmpty()
    {
        var engine = new CraftingEngine();
        var registry = CreateRegistryWithRecipe();
        var state = CreateState();
        state.AddItem(ItemInstance.Create("material_wood_raw", 2));

        // Add an in-progress job using Foundry
        state.ActiveCraftingJobs.Add(new CraftingJob
        {
            Id = Guid.NewGuid(),
            RecipeId = "some_other",
            Workstation = WorkstationType.Foundry,
            StartedAt = DateTime.UtcNow,
            Duration = TimeSpan.FromHours(1),
            Status = CraftingJobStatus.InProgress
        });

        var result = engine.FindCraftableRecipes(state, registry);

        Assert.Empty(result);
    }

    [Fact]
    public void FindCraftable_CompletedJobOnStation_AllowsNew()
    {
        var engine = new CraftingEngine();
        var registry = CreateRegistryWithRecipe();
        var state = CreateState();
        state.AddItem(ItemInstance.Create("material_wood_raw", 2));

        // A completed job doesn't block the station
        state.ActiveCraftingJobs.Add(new CraftingJob
        {
            Id = Guid.NewGuid(),
            RecipeId = "some_other",
            Workstation = WorkstationType.Foundry,
            StartedAt = DateTime.UtcNow.AddHours(-2),
            Duration = TimeSpan.FromSeconds(1),
            Status = CraftingJobStatus.Completed
        });

        var result = engine.FindCraftableRecipes(state, registry);

        Assert.Single(result);
    }

    // ── StartCraftingJob ──────────────────────────────────────────────

    [Fact]
    public void StartJob_ConsumesIngredients_CreatesJob()
    {
        var engine = new CraftingEngine();
        var registry = CreateRegistryWithRecipe();
        var state = CreateState();
        state.AddItem(ItemInstance.Create("material_wood_raw", 2));

        var recipe = registry.Recipes["refine_wood"];
        var events = engine.StartCraftingJob(recipe, state, registry);

        // Ingredients consumed
        Assert.Equal(0, state.CountItems("material_wood_raw"));
        // Job created
        Assert.Single(state.ActiveCraftingJobs);
        Assert.Equal("refine_wood", state.ActiveCraftingJobs[0].RecipeId);
        Assert.Equal(CraftingJobStatus.InProgress, state.ActiveCraftingJobs[0].Status);
        // Events emitted
        Assert.Contains(events, e => e is CraftingStartedEvent);
        Assert.Contains(events, e => e is ItemConsumedEvent);
    }

    [Fact]
    public void StartJob_DurationBasedOnResultRarity()
    {
        var engine = new CraftingEngine();
        var registry = new ContentRegistry();
        registry.RegisterItem(new ItemDefinition(
            "input", "item.input", ItemCategory.Material, ItemRarity.Common, ["Material"]));
        registry.RegisterItem(new ItemDefinition(
            "output", "item.output", ItemCategory.Material, ItemRarity.Rare, ["Material"]));
        registry.RegisterRecipe(new Recipe(
            "test", "recipe.test", WorkstationType.Foundry,
            [new RecipeIngredient("input", 1)],
            new RecipeResult("output", 1)));

        var state = CreateState();
        state.AddItem(ItemInstance.Create("input", 1));

        engine.StartCraftingJob(registry.Recipes["test"], state, registry);

        Assert.Equal(TimeSpan.FromSeconds(60), state.ActiveCraftingJobs[0].Duration);
    }

    // ── TickJobs ──────────────────────────────────────────────────────

    [Fact]
    public void TickJobs_InProgressNotElapsed_NoEvent()
    {
        var engine = new CraftingEngine();
        var state = CreateState();
        state.ActiveCraftingJobs.Add(new CraftingJob
        {
            Id = Guid.NewGuid(),
            RecipeId = "test",
            Workstation = WorkstationType.Foundry,
            StartedAt = DateTime.UtcNow,
            Duration = TimeSpan.FromHours(1),
            Status = CraftingJobStatus.InProgress
        });

        var events = engine.TickJobs(state);

        Assert.Empty(events);
        Assert.Equal(CraftingJobStatus.InProgress, state.ActiveCraftingJobs[0].Status);
    }

    [Fact]
    public void TickJobs_InProgressElapsed_MarksCompleted()
    {
        var engine = new CraftingEngine();
        var state = CreateState();
        state.ActiveCraftingJobs.Add(new CraftingJob
        {
            Id = Guid.NewGuid(),
            RecipeId = "test",
            Workstation = WorkstationType.Foundry,
            StartedAt = DateTime.UtcNow.AddSeconds(-10),
            Duration = TimeSpan.FromSeconds(1),
            Status = CraftingJobStatus.InProgress
        });

        var events = engine.TickJobs(state);

        Assert.Single(events);
        Assert.IsType<CraftingCompletedEvent>(events[0]);
        Assert.Equal(CraftingJobStatus.Completed, state.ActiveCraftingJobs[0].Status);
    }

    [Fact]
    public void TickJobs_AlreadyCompleted_NoDoubleEvent()
    {
        var engine = new CraftingEngine();
        var state = CreateState();
        state.ActiveCraftingJobs.Add(new CraftingJob
        {
            Id = Guid.NewGuid(),
            RecipeId = "test",
            Workstation = WorkstationType.Foundry,
            StartedAt = DateTime.UtcNow.AddSeconds(-10),
            Duration = TimeSpan.FromSeconds(1),
            Status = CraftingJobStatus.Completed
        });

        var events = engine.TickJobs(state);

        Assert.Empty(events);
    }

    // ── CollectCompleted ──────────────────────────────────────────────

    [Fact]
    public void Collect_CompletedJob_CreatesResultItem()
    {
        var engine = new CraftingEngine();
        var registry = CreateRegistryWithRecipe();
        var state = CreateState();
        state.ActiveCraftingJobs.Add(new CraftingJob
        {
            Id = Guid.NewGuid(),
            RecipeId = "refine_wood",
            Workstation = WorkstationType.Foundry,
            StartedAt = DateTime.UtcNow.AddSeconds(-10),
            Duration = TimeSpan.FromSeconds(1),
            Status = CraftingJobStatus.Completed
        });

        var events = engine.CollectCompleted(state, registry);

        // Result item added
        Assert.True(state.HasItem("material_wood_refined"));
        // Job removed
        Assert.Empty(state.ActiveCraftingJobs);
        // Events: ItemReceivedEvent + CraftingCollectedEvent
        Assert.Contains(events, e => e is ItemReceivedEvent);
        Assert.Contains(events, e => e is CraftingCollectedEvent);
    }

    [Fact]
    public void Collect_NoCompletedJobs_NoEvents()
    {
        var engine = new CraftingEngine();
        var registry = CreateRegistryWithRecipe();
        var state = CreateState();

        var events = engine.CollectCompleted(state, registry);

        Assert.Empty(events);
    }

    [Fact]
    public void Collect_InProgressJob_NotCollected()
    {
        var engine = new CraftingEngine();
        var registry = CreateRegistryWithRecipe();
        var state = CreateState();
        state.ActiveCraftingJobs.Add(new CraftingJob
        {
            Id = Guid.NewGuid(),
            RecipeId = "refine_wood",
            Workstation = WorkstationType.Foundry,
            StartedAt = DateTime.UtcNow,
            Duration = TimeSpan.FromHours(1),
            Status = CraftingJobStatus.InProgress
        });

        var events = engine.CollectCompleted(state, registry);

        Assert.Empty(events);
        Assert.Single(state.ActiveCraftingJobs);
    }

    // ── AutoCraftCheck ────────────────────────────────────────────────

    [Fact]
    public void AutoCraft_MatchingRecipeExists_StartsJob()
    {
        var engine = new CraftingEngine();
        var registry = CreateRegistryWithRecipe();
        var state = CreateState();
        state.AddItem(ItemInstance.Create("material_wood_raw", 2));

        var events = engine.AutoCraftCheck(state, registry);

        Assert.Contains(events, e => e is CraftingStartedEvent);
        Assert.Single(state.ActiveCraftingJobs);
        Assert.Equal(0, state.CountItems("material_wood_raw"));
    }

    [Fact]
    public void AutoCraft_NoMatchingRecipe_NoAction()
    {
        var engine = new CraftingEngine();
        var registry = CreateRegistryWithRecipe();
        var state = CreateState();
        // No materials

        var events = engine.AutoCraftCheck(state, registry);

        Assert.Empty(events);
        Assert.Empty(state.ActiveCraftingJobs);
    }

    // ── CraftingJob properties ────────────────────────────────────────

    [Fact]
    public void CraftingJob_IsComplete_TrueWhenTimeElapsed()
    {
        var job = new CraftingJob
        {
            Id = Guid.NewGuid(),
            RecipeId = "test",
            Workstation = WorkstationType.Foundry,
            StartedAt = DateTime.UtcNow.AddSeconds(-10),
            Duration = TimeSpan.FromSeconds(1),
            Status = CraftingJobStatus.InProgress
        };

        Assert.True(job.IsComplete);
    }

    [Fact]
    public void CraftingJob_IsComplete_FalseWhenNotElapsed()
    {
        var job = new CraftingJob
        {
            Id = Guid.NewGuid(),
            RecipeId = "test",
            Workstation = WorkstationType.Foundry,
            StartedAt = DateTime.UtcNow,
            Duration = TimeSpan.FromHours(1),
            Status = CraftingJobStatus.InProgress
        };

        Assert.False(job.IsComplete);
    }

    [Fact]
    public void CraftingJob_ProgressPercent_CompletedIs100()
    {
        var job = new CraftingJob
        {
            Id = Guid.NewGuid(),
            RecipeId = "test",
            Workstation = WorkstationType.Foundry,
            StartedAt = DateTime.UtcNow.AddMinutes(-5),
            Duration = TimeSpan.FromSeconds(1),
            Status = CraftingJobStatus.Completed
        };

        Assert.Equal(100.0, job.ProgressPercent);
    }

    // ── GetCraftDuration ──────────────────────────────────────────────

    [Theory]
    [InlineData(ItemRarity.Common, 15)]
    [InlineData(ItemRarity.Uncommon, 30)]
    [InlineData(ItemRarity.Rare, 60)]
    [InlineData(ItemRarity.Epic, 90)]
    [InlineData(ItemRarity.Legendary, 120)]
    [InlineData(ItemRarity.Mythic, 180)]
    public void GetCraftDuration_CorrectPerRarity(ItemRarity rarity, int expectedSeconds)
    {
        Assert.Equal(TimeSpan.FromSeconds(expectedSeconds), CraftingEngine.GetCraftDuration(rarity));
    }
}

// ══════════════════════════════════════════════════════════════════════════
//  CraftingPanel Tests
// ══════════════════════════════════════════════════════════════════════════

public class CraftingPanelTests
{
    [Fact]
    public void Render_EmptyJobs_ShowsEmptyMessage()
    {
        var state = GameState.Create("Test", Locale.EN);
        var output = RenderHelper.RenderToString(CraftingPanel.Render(state));

        Assert.NotEmpty(output);
        // Should contain the empty workshop message
        Assert.Contains("active", output, StringComparison.OrdinalIgnoreCase);
    }

    [Fact]
    public void Render_InProgressJob_ShowsProgressBar()
    {
        var state = GameState.Create("Test", Locale.EN);
        state.ActiveCraftingJobs.Add(new CraftingJob
        {
            Id = Guid.NewGuid(),
            RecipeId = "refine_wood",
            Workstation = WorkstationType.Foundry,
            StartedAt = DateTime.UtcNow,
            Duration = TimeSpan.FromHours(1),
            Status = CraftingJobStatus.InProgress
        });

        var output = RenderHelper.RenderToString(CraftingPanel.Render(state));

        Assert.NotEmpty(output);
        Assert.Contains("Foundry", output);
        Assert.Contains("%", output);
    }

    [Fact]
    public void Render_CompletedJob_ShowsDone()
    {
        var state = GameState.Create("Test", Locale.EN);
        state.ActiveCraftingJobs.Add(new CraftingJob
        {
            Id = Guid.NewGuid(),
            RecipeId = "refine_wood",
            Workstation = WorkstationType.Foundry,
            StartedAt = DateTime.UtcNow.AddSeconds(-10),
            Duration = TimeSpan.FromSeconds(1),
            Status = CraftingJobStatus.Completed
        });

        var output = RenderHelper.RenderToString(CraftingPanel.Render(state));

        Assert.NotEmpty(output);
        Assert.Contains("Foundry", output);
    }

    [Fact]
    public void Render_WithRegistry_ResolvesRecipeName()
    {
        var registry = new ContentRegistry();
        registry.RegisterRecipe(new Recipe(
            "refine_wood", "recipe.refine_wood", WorkstationType.Foundry,
            [new RecipeIngredient("material_wood_raw", 2)],
            new RecipeResult("material_wood_refined", 1)));

        var state = GameState.Create("Test", Locale.EN);
        state.ActiveCraftingJobs.Add(new CraftingJob
        {
            Id = Guid.NewGuid(),
            RecipeId = "refine_wood",
            Workstation = WorkstationType.Foundry,
            StartedAt = DateTime.UtcNow,
            Duration = TimeSpan.FromHours(1),
            Status = CraftingJobStatus.InProgress
        });

        var output = RenderHelper.RenderToString(CraftingPanel.Render(state, registry));

        Assert.NotEmpty(output);
        // Should show recipe name key (or localized version)
        Assert.Contains("recipe.refine_wood", output);
    }

    [Fact]
    public void Render_MixedJobs_DoesNotThrow()
    {
        var state = GameState.Create("Test", Locale.EN);
        state.ActiveCraftingJobs.Add(new CraftingJob
        {
            Id = Guid.NewGuid(),
            RecipeId = "job1",
            Workstation = WorkstationType.Foundry,
            StartedAt = DateTime.UtcNow,
            Duration = TimeSpan.FromHours(1),
            Status = CraftingJobStatus.InProgress
        });
        state.ActiveCraftingJobs.Add(new CraftingJob
        {
            Id = Guid.NewGuid(),
            RecipeId = "job2",
            Workstation = WorkstationType.Furnace,
            StartedAt = DateTime.UtcNow.AddSeconds(-10),
            Duration = TimeSpan.FromSeconds(1),
            Status = CraftingJobStatus.Completed
        });

        var output = RenderHelper.RenderToString(CraftingPanel.Render(state));

        Assert.NotEmpty(output);
        Assert.Contains("Foundry", output);
        Assert.Contains("Furnace", output);
    }
}

// ══════════════════════════════════════════════════════════════════════════
//  Recipe Loading Tests
// ══════════════════════════════════════════════════════════════════════════

public class RecipeLoadingTests
{
    private static string ContentPath(string file) =>
        Path.Combine("content", "data", file);

    [Fact]
    public void LoadRecipes_AllRecipesLoaded()
    {
        var registry = ContentRegistry.LoadFromFiles(
            ContentPath("items.json"),
            ContentPath("boxes.json"),
            ContentPath("interactions.json"),
            ContentPath("recipes.json"));

        Assert.NotEmpty(registry.Recipes);
        // recipes.json has 18 recipes after removing alchemy/supply/energy/oxygen recipes
        Assert.True(registry.Recipes.Count >= 15, $"Expected >= 15 recipes, got {registry.Recipes.Count}");
    }

    [Fact]
    public void LoadRecipes_AllRecipesHaveIngredients()
    {
        var registry = ContentRegistry.LoadFromFiles(
            ContentPath("items.json"),
            ContentPath("boxes.json"),
            ContentPath("interactions.json"),
            ContentPath("recipes.json"));

        foreach (var recipe in registry.Recipes.Values)
        {
            Assert.NotEmpty(recipe.Ingredients);
            foreach (var ingredient in recipe.Ingredients)
            {
                Assert.NotNull(ingredient.ItemDefinitionId);
                Assert.True(ingredient.Quantity > 0, $"Recipe {recipe.Id} has ingredient with qty <= 0");
            }
        }
    }

    [Fact]
    public void LoadRecipes_AllRecipesHaveResult()
    {
        var registry = ContentRegistry.LoadFromFiles(
            ContentPath("items.json"),
            ContentPath("boxes.json"),
            ContentPath("interactions.json"),
            ContentPath("recipes.json"));

        foreach (var recipe in registry.Recipes.Values)
        {
            Assert.NotNull(recipe.Result);
            Assert.NotNull(recipe.Result.ItemDefinitionId);
            Assert.True(recipe.Result.Quantity > 0, $"Recipe {recipe.Id} has result with qty <= 0");
        }
    }

    [Fact]
    public void LoadRecipes_AllRecipesHaveValidWorkstation()
    {
        var registry = ContentRegistry.LoadFromFiles(
            ContentPath("items.json"),
            ContentPath("boxes.json"),
            ContentPath("interactions.json"),
            ContentPath("recipes.json"));

        var validStations = Enum.GetValues<WorkstationType>().ToHashSet();

        foreach (var recipe in registry.Recipes.Values)
        {
            Assert.Contains(recipe.Workstation, validStations);
        }
    }

    [Fact]
    public void LoadRecipes_NullPath_Succeeds()
    {
        // Without recipes path, registry should still work
        var registry = ContentRegistry.LoadFromFiles(
            ContentPath("items.json"),
            ContentPath("boxes.json"),
            ContentPath("interactions.json"));

        Assert.Empty(registry.Recipes);
    }

    [Fact]
    public void LoadRecipes_AllBlueprintItemsExist()
    {
        var registry = ContentRegistry.LoadFromFiles(
            ContentPath("items.json"),
            ContentPath("boxes.json"),
            ContentPath("interactions.json"),
            ContentPath("recipes.json"));

        // Every blueprint item should have a WorkstationType set
        var blueprints = registry.Items.Values
            .Where(i => i.Tags.Contains("Blueprint"))
            .ToList();

        Assert.NotEmpty(blueprints);
        foreach (var bp in blueprints)
        {
            Assert.True(bp.WorkstationType.HasValue, $"Blueprint {bp.Id} missing WorkstationType");
        }
    }

    [Fact]
    public void LoadRecipes_EachUsedWorkstation_HasBlueprint()
    {
        var registry = ContentRegistry.LoadFromFiles(
            ContentPath("items.json"),
            ContentPath("boxes.json"),
            ContentPath("interactions.json"),
            ContentPath("recipes.json"));

        var usedStations = registry.Recipes.Values
            .Select(r => r.Workstation)
            .Distinct()
            .ToHashSet();

        var blueprintStations = registry.Items.Values
            .Where(i => i.WorkstationType.HasValue)
            .Select(i => i.WorkstationType!.Value)
            .ToHashSet();

        foreach (var station in usedStations)
        {
            Assert.Contains(station, blueprintStations);
        }
    }
}

// ══════════════════════════════════════════════════════════════════════════
//  GameSimulation Crafting Integration Tests
// ══════════════════════════════════════════════════════════════════════════

public class SimulationCraftingTests
{
    private static string ContentPath(string file) =>
        Path.Combine("content", "data", file);

    [Fact]
    public void OpenBox_WithMaterials_TriggerAutoCraft()
    {
        var registry = ContentRegistry.LoadFromFiles(
            ContentPath("items.json"),
            ContentPath("boxes.json"),
            ContentPath("interactions.json"),
            ContentPath("recipes.json"));

        var state = GameState.Create("Test", Locale.EN);
        state.UnlockedUIFeatures.Add(UIFeature.CraftingPanel);
        state.UnlockedWorkstations.Add(WorkstationType.Foundry);

        // Pre-add materials so that after any box opening, auto-craft can check
        state.AddItem(ItemInstance.Create("material_wood_raw", 2));

        var engine = new CraftingEngine();
        var events = engine.AutoCraftCheck(state, registry);

        // Should start a crafting job for refine_wood
        Assert.Contains(events, e => e is CraftingStartedEvent cs && cs.RecipeId == "refine_wood");
        Assert.Single(state.ActiveCraftingJobs);
    }
}