-- Genre two of milestone 4:  tower defence.  Creeps that walk a lane on the navigation mesh in
-- waves, turrets placed with a click on the floor that fire at the nearest creep in range,
-- projectiles that collide, gold and lives.  Nothing here is shared with the racing game but the
-- scene.
return {
	title  = "Author test:  tower defence",
	size   = { w = 720, h = 480 },
	layers = { { kind = "scene3d", ambient = { r = 80, g = 90, b = 80 }, fov = 55 }, { kind = "overlay" } },
	vars   = { score = 0, gold = 120, lives = 5, killed = 0 },

	kinds = {
		floor   = { look = { kind = "mesh", shape = "box", w = 30, h = 0.4, d = 24, r = 80, g = 110, b = 80 }, behaviours = { { kind = "solid" } } },
		creep   = { look = { kind = "mesh", shape = "box", w = 0.6, h = 0.8, d = 0.6, r = 120, g = 200, b = 90 },
		            vars = { health = 3 },
		            behaviours = { { kind = "walker", speed = 2.5, radius = 0.3 },
		                           { kind = "patrol", points = { { x = -10, y = 0, z = -6 }, { x = 10, y = 0, z = -6 }, { x = 10, y = 0, z = 6 }, { x = -10, y = 0, z = 6 } } },
		                           { kind = "health", max = 3 } } },
		hive    = { look = { kind = "none" }, behaviours = { { kind = "spawner", spawns = "creep", every = 1.2, max = 8, total = 10, points = { { x = -12, y = 0, z = -6 } } } } },
		turret  = { look = { kind = "mesh", shape = "cylinder", w = 0.8, h = 1.2, r = 70, g = 90, b = 220 },
		            behaviours = { { kind = "turret", targets = "creep", range = 6, rate = 0.5, spawns = "bolt", speed = 14 } } },
		bolt    = { look = { kind = "mesh", shape = "sphere", w = 0.25, r = 255, g = 230, b = 80 },
		            behaviours = { { kind = "projectile", life = 2 } } },
		camera  = { look = { kind = "none" }, behaviours = { { kind = "camera", mode = "fixed", lookX = 0, lookY = 0, lookZ = 0 } } },
		readout = { look = { kind = "text", text = "", r = 235, g = 235, b = 245 } }
	},

	rooms = {
		{ name = "field",
		  navFrom  = { "floor" },
		  entities = {
			{ kind = "floor",   id = "floor",   x = 0,   y = -0.2, z = 0  },
			{ kind = "hive",    id = "hive",    x = -12, y = 0,    z = -6 },
			{ kind = "camera",  id = "camera",  x = 0,   y = 20,   z = 14 },
			{ kind = "readout", id = "readout", x = 12,  y = 12,   z = 0  }
		  } }
	},

	rules = {
		{ note = "A click on the floor builds a turret, for fifty gold",
		  on   = "pressed", switch = "SWITCH_BUTTON3",
		  when = { { "test", expr = "gold >= 50" } },
		  act  = { { "spawnAtPointer", kind = "turret", player = 1 },
		           { "addVar", name = "gold", amount = -50 } } },

		{ note = "A bolt lands",
		  on   = "collision", a = "bolt", b = "creep",
		  act  = { { "destroy", entity = "self" },
		           { "damage", entity = "other", amount = 1 } } },

		{ note = "A creep dies",
		  on   = "death", kind = "creep",
		  act  = { { "addVar", name = "gold", amount = 20 },
		           { "addScore", amount = 10 },
		           { "addVar", name = "killed", amount = 1 } } },

		{ note = "A creep reaches the end of the lane",
		  on   = "patrolEnd", kind = "creep",
		  act  = { { "destroy", entity = "self" },
		           { "addVar", name = "lives", amount = -1 } } },

		{ note = "Out of lives",
		  on   = "frame",
		  when = { { "test", expr = "lives <= 0" }, { "once", tag = "over", scope = "game" } },
		  act  = { { "gameOver" } } },

		{ note = "The readout, every frame",
		  on   = "frame",
		  act  = { { "setText", entity = "readout", text = '"gold " .. gold .. "  lives " .. lives .. "  killed " .. killed .. "  creeps " .. count("creep")' } } }
	}
}