require 'honey.std'

-- initialize honey
window = honey.init()
window:setInputMode(glfw.CURSOR, glfw.CURSOR_DISABLED)

-- setup vector graphics
local vg = nvg.CreateContext()
local november = nvg.CreateFont(vg, "November", "assets/november.regular.ttf")
local vw, vh = 640, 480

-- setup physics
local space = ode.HashSpaceCreate(ode.Space0)
local world = ode.WorldCreate()
ode.WorldSetGravity(world, 0, -10, 0)
ode.WorldSetCFM(world, 1e-5)
local physicsGc = honey.util.gc_canary(function()
	ode.SpaceDestroy(space)
	ode.WorldDestroy(world)
end)


-- setup ecs
local entities = honey.ecs.EntityDb()
local systems = honey.ecs.SystemDb(entities)
local script = honey.ecs.script
systems:addSystem(honey.ecs.node.system)
systems:addSystem(honey.ecs.render.system)
systems:addSystem(honey.ecs.script.system)
systems:addSystem(honey.ecs.collision.system, {space=space})
systems:addSystem(honey.ecs.physics.system, {space=space, world=world})

function setupEntities()

	local plane = entities:createEntity()
	entities:addComponents(plane, {
		node = { 
			matrix = Mat4()
				:identity()
				:rotateZ(math.rad(5))
		},
		collision = {
			class = "plane",
		},
	})

	local planeMesh = entities:createEntityWithComponents{
		node = {
			parent = plane,
			matrix = Mat4():identity():rotateX(0.5*math.pi):scale(Vec3{20,20,20}),
		},
		renderMesh = {
			textures = { ourTexture={ filename="assets/green+grass-1024x1024.jpg" } },
			shader = { vertex="vertex.glsl", fragment="fragment.glsl" },
			mesh = { filename="builtin.quad", index=1 },
		},
	}
	
	
	
	local id = entities:createEntity()
	entities:addComponents(id, {
		renderMesh = {
			textures = { ourTexture={ filename="77155.png" } },
			shader = { vertex="vertex.glsl", fragment="fragment.glsl" },
			mesh = { filename="assets/icosahedron.obj", index=1 },
		},
		node = {
			matrix = Mat4()
				:identity()
				:translate(Vec3{0,1,0})
				:rotateZ(math.rad(45)),
		},
		collision = {
			class = "sphere",
			radius = 1,
		},
		physics = {
			mass = {
				class = "sphere",
				density = 1,
				radius = 1,
			},
			surface = true,
			velocity = Vec3{ 0, 0, 0 },
			angularVelocity = Vec3{ 0, 0, 0 },
		},
	})
	
	local id2 = entities:createEntity()
	entities:addComponents(id2, {
		renderMesh = {
			shader = { vertex="vertex.glsl", fragment="fragment.glsl" },
			--mesh = { filename="assets/tetrahedron.obj", index=1 },
			mesh = { filename="builtin.quad", index=1 },
		},
		node = {
			parent=id,
			matrix=Mat4():identity():translate(Vec3{0, 2, 0}),
		},
	})

	local quad = entities:createEntity()
	entities:addComponents(quad, {
		renderQuad = {
			shader = { vertex="vertex.glsl", fragment="fragment.glsl" },
			textures = { ourTexture = { filename = "44d9a0ec1c18e6126a5e9d9d9317f5ac.png" } },
		},
	})

	require('character')(entities)

	local skybox = entities:createEntityWithComponents{
		node = {
			matrix = Mat4():identity():scale(Vec3{2,2,2}):rotateX(math.rad(90))
		},
		renderMesh = {
			mesh = { 
				filename="assets/skybox.obj", 
				index=1,
			},
			shader = { vertex="vertex.glsl", fragment="fragment.glsl" },
			textures = { 
				ourTexture = { 
					filename = "assets/skyboxsun5deg2_tn.jpg" 
					--filename = "assets/skybox.png"
				} 
			},
		},
	}

	local misc = entities:createEntityWithComponents{
		onKey = { script = "scripts.loadSaveQuit" },
		onFramebufferSize = { script = "scripts.viewportResize" },
	}
end
setupEntities()


-- connect event handler scripts
window:bindEvents(entities)

--entities:load("save")


-- main loop
local time = 0
honey.loop(window, function(dt)
	time = time + dt
	if time > 1 then
		time = time-1
		print(collectgarbage("count"))
	end
	gl.ClearColor(0.2, 0.4, 1.0, 1.0)
	gl.Clear(gl.COLOR_BUFFER_BIT + gl.DEPTH_BUFFER_BIT + gl.STENCIL_BUFFER_BIT)

	gl.Enable(gl.DEPTH_TEST)
	gl.Disable(gl.CULL_FACE)

	systems:update(dt)
	nvg.BeginFrame(vg, vw, vh, 1.0)
	nvg.StrokeColor(vg, nvg.RGBf(1, 1, 1))
	nvg.FontFace(vg, "November")
	nvg.Text(vg, 50, 50, "fps: "..tostring(math.floor(1/dt)))
	nvg.EndFrame(vg)
end)


-- clean up
honey.terminate()