using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Rendering;

namespace Ironspore
{
    public static class WorldFactory
    {
        static readonly Dictionary<string, Material> materials = new Dictionary<string, Material>();
        public enum Surface { Painted, Concrete, BareMetal }
        public static Material Material(Color color, bool glow = false, Surface surface = Surface.Painted)
        {
            string key = ColorUtility.ToHtmlStringRGB(color) + (glow ? "g" : "") + (int)surface;
            if (materials.TryGetValue(key, out var cached) && cached)
                return cached;
            var mat = new Material(Shader.Find("Standard"));
            mat.color = color;
            mat.SetFloat("_Metallic", surface == Surface.BareMetal ? .78f : surface == Surface.Concrete ? 0 : .04f);
            mat.SetFloat("_Glossiness", surface == Surface.Concrete ? .15f : surface == Surface.BareMetal ? .48f : .32f);
            mat.enableInstancing = true;
            if (glow)
            {
                mat.EnableKeyword("_EMISSION");
                mat.SetColor("_EmissionColor", color * 1.25f);
            }
            materials[key] = mat;
            return mat;
        }
        public static GameObject Box(string name, Vector3 position, Vector3 scale, Color color, Transform parent, bool collision = true, bool glow = false)
        {
            return Primitive(PrimitiveType.Cube, name, position, scale, color, parent, collision, glow);
        }
        public static GameObject Cylinder(string name, Vector3 position, Vector3 scale, Color color, Transform parent, bool collision = true)
        {
            return Primitive(PrimitiveType.Cylinder, name, position, scale, color, parent, collision, false);
        }
        public static GameObject Primitive(PrimitiveType type, string name, Vector3 position, Vector3 scale, Color color, Transform parent, bool collision, bool glow)
        {
            var obj = GameObject.CreatePrimitive(type);
            obj.name = name;
            obj.transform.SetParent(parent);
            obj.transform.position = position;
            obj.transform.localScale = scale;
            var renderer = obj.GetComponent<Renderer>();
            var surface = name == "Ground" || name == "AccessRamp" ? Surface.Concrete : name == "ContainerRib" || name == "CanopyRail" ? Surface.BareMetal : Surface.Painted;
            renderer.sharedMaterial = Material(color, glow, surface);
            bool detail = name == "FloorSeam" || name == "AmberStripe" || name == "CrateLatch" || name == "RelayScreen" || name == "LandingLight" || name == "CanopyIndicator" || name.EndsWith("WorkFixture");
            renderer.shadowCastingMode = detail || name == "EnemyBolt" ? ShadowCastingMode.Off : ShadowCastingMode.On;
            renderer.receiveShadows = !glow;
            if (name == "EnemyBolt") obj.layer = 10;
            if (!collision)
                Object.Destroy(obj.GetComponent<Collider>());
            return obj;
        }
        public static GameObject Cockpit(Transform camera)
        {
            var root = new GameObject("CockpitFrame");
            root.transform.SetParent(camera, false);
            foreach (int side in new[] { -1, 1 })
            {
                var frame = Box("CanopyRail", Vector3.zero, new Vector3(.045f, .8f, .06f), new Color(.08f, .16f, .19f), root.transform, false);
                frame.transform.localPosition = new Vector3(side * .48f, -.05f, .7f);
                frame.transform.localRotation = Quaternion.Euler(0, 0, side * -12);
                var indicator = Box("CanopyIndicator", Vector3.zero, new Vector3(.018f, .27f, .065f), new Color(.05f, .9f, .75f), root.transform, false, true);
                indicator.transform.localPosition = new Vector3(side * .48f, -.15f, .66f);
            }
            var dashboard = Box("Dashboard", Vector3.zero, new Vector3(1.3f, .14f, .2f), new Color(.07f, .13f, .16f), root.transform, false);
            dashboard.transform.localPosition = new Vector3(0, -.42f, .75f);
            foreach (var child in root.GetComponentsInChildren<Transform>())
                child.gameObject.layer = 8;
            foreach (var renderer in root.GetComponentsInChildren<Renderer>())
            {
                renderer.shadowCastingMode = ShadowCastingMode.Off;
                renderer.lightProbeUsage = LightProbeUsage.Off;
                renderer.reflectionProbeUsage = ReflectionProbeUsage.Off;
            }
            root.SetActive(false);
            return root;
        }
        public static void Label(string key, Vector3 position, Color color, Transform parent)
        {
            var obj = new GameObject("Sign");
            obj.transform.SetParent(parent);
            obj.transform.position = position;
            obj.layer = 11;
            var label = obj.AddComponent<TextMesh>();
            label.fontSize = 40;
            label.characterSize = .09f;
            label.anchor = TextAnchor.MiddleCenter;
            label.color = color;
            var renderer = obj.GetComponent<Renderer>();
            renderer.shadowCastingMode = ShadowCastingMode.Off;
            renderer.receiveShadows = false;
            renderer.lightProbeUsage = LightProbeUsage.Off;
            renderer.reflectionProbeUsage = ReflectionProbeUsage.Off;
            obj.AddComponent<LocalizedWorldLabel>().Initialize(key);
            obj.AddComponent<FaceCamera>();
        }
        public static void Tracer(Vector3 from, Vector3 to, Color color)
        {
            var obj = new GameObject("ShotTrace");
            var line = obj.AddComponent<LineRenderer>();
            obj.layer = 11;
            line.shadowCastingMode = ShadowCastingMode.Off;
            line.receiveShadows = false;
            line.lightProbeUsage = LightProbeUsage.Off;
            line.reflectionProbeUsage = ReflectionProbeUsage.Off;
            line.positionCount = 2;
            line.SetPosition(0, from);
            line.SetPosition(1, to);
            line.startWidth = .045f;
            line.endWidth = .015f;
            line.sharedMaterial = Material(color, true);
            Object.Destroy(obj, .07f);
        }
    }
    public sealed class FaceCamera : MonoBehaviour
    {
        void LateUpdate()
        {
            var c = Camera.main;
            if (!c)
                c = Object.FindAnyObjectByType<Camera>();
            if (c)
                transform.rotation = c.transform.rotation;
        }
    }
    public static class GameAudio
    {
        public static void Cue(float frequency, float length, float volume = .12f)
        {
            int count = (int)(22050 * length);
            var data = new float[count];
            for (int i = 0; i < count; i++)
            {
                float t = i / 22050f;
                data[i] = Mathf.Sin(t * frequency * Mathf.PI * 2) * Mathf.Exp(-t / length * 6);
            }
            var clip = AudioClip.Create("SynthCue", count, 1, 22050, false);
            clip.SetData(data, 0);
            var camera = Object.FindAnyObjectByType<AudioListener>();
            if (camera)
                AudioSource.PlayClipAtPoint(clip, camera.transform.position, volume);
            Object.Destroy(clip, length + 1);
        }
    }
}