#include "script/common.lua"

function init()
	--Register tool and enable it
	RegisterTool("camera", "loc@TOOL_CAMERA", "")
	SetBool("game.tool.camera.enabled", true)
	inShot = false
	focusTimer = 0
	focusSound = LoadLoop("camera-focus.ogg")
	shotSound = LoadSound("camera-shot.ogg")
	errorSound = LoadSound("error.ogg")
	currentDist = 100
	targetInFocus = {}
	targets = FindBodies("target", true)
	focusDist = 0
end

function tick(dt)
	SetBool("level.cameraclick", false)

	if GetTime() < 0.5 then
		--Make sure camera is selected when entering level
		SetString("game.player.tool", "camera")
	end
	
	if GetString("game.player.tool") == "camera" then
		SetString("game.tool.camera.ammo.display", "")
		
		local ct = GetPlayerCameraTransform()
		local fwd = TransformToParentVec(ct, Vec(0, 0, -1))
		local hit, dist = QueryRaycast(ct.pos, fwd, 100)
		if hit then
			currentDist = dist
		else
			currentDist = 100
		end
		
		if GetBool("game.player.canusetool") then
			if InputPressed("usetool") then
				inShot = true
				focusTimer = 0
				focusDist = currentDist
				targetInFocus = {}
			end
			if inShot then 
				if InputDown("usetool") then
					focusTimer = focusTimer + dt
					SetCameraDof(clamp(focusTimer, 0.0, 1.0) * focusDist)
					if focusTimer < 1.0 then 
						PlayLoop(focusSound)
					else
						PlaySound(shotSound)
						PointLight(TransformToParentPoint(GetPlayerCameraTransform(), Vec(0, 0, -1)), 1, 1, 1, 30)
						SetBool("level.cameraclick", true)

						for i=1, #targets do
							local target = targets[i]
							if targetInFocus[target] then
								SetTag(target, "target", "cleared")
							end
						end
						targetInFocus = {}
						inShot = false
						focusTimer = 0
					end
				else
					focusTimer = 0
					inShot = false
				end
			end
		else
			inShot = false
		end
	end
end


function draw()
	if GetString("level.state")=="" and GetString("game.player.tool") == "camera" and GetFloat("game.map.fade") < 0.1 then
		UiPush()
			UiTranslate(100, 100)
			UiAlign("top left")
			UiImage("camera-ul.png")
		UiPop()
		UiPush()
			UiTranslate(UiWidth()-100, 100)
			UiAlign("top right")
			UiImage("camera-ur.png")
		UiPop()
		UiPush()
			UiTranslate(100, UiHeight()-100)
			UiAlign("bottom left")
			UiImage("camera-ll.png")
		UiPop()
		UiPush()
			UiTranslate(UiWidth()-100, UiHeight()-100)
			UiAlign("bottom right")
			UiImage("camera-lr.png")
		UiPop()
		UiPush()
			UiTranslate(UiCenter(), UiHeight()-65)
			UiAlign("center middle")
			UiImage("camera-lc.png")
		UiPop()
		local hasTarget = false
		local focusSize = 106 - 53*focusTimer
		for i=1, #targets do
			local target = targets[i]
			local inFocus = false
			if HasTag(target, "target") then
				local t = GetBodyTransform(target)
				local pos = TransformToParentPoint(t, Vec(0, 0.5, 0))
				local player = GetPlayerCameraTransform().pos
				local toPos = VecSub(pos, player)
				local dist = VecLength(toPos)
				toPos = VecScale(toPos, 1.0/dist)
				local bodies = GetJointedBodies(target)
				for j=1,#bodies do
					QueryRejectBody(bodies[j])
				end
				local hit = QueryRaycast(player, toPos, dist)
				if not hit then
					local x, y, distPx = UiWorldToPixel(pos)
					if distPx > 0 and distPx < 8 then
						UiPush()
							local alpha = 1.0
							alpha = clamp((distPx - 1.0), 0.0, alpha)
							alpha = clamp((8.0 - distPx), 0.0, alpha)
							UiTranslate(x, y)
							UiAlign("center middle")
							local inside = true
							if math.abs(x-UiCenter()) > focusSize then inside = false end
							if math.abs(y-UiMiddle()) > focusSize then inside = false end
							if inShot and targetInFocus[target] == false then inside = false end
							if alpha > 0 then
								if inside then
									UiColor(0.7,1,0.7,alpha)
									UiScale(1.1)
									UiImage("camera-icon.png")
									inFocus = true
									
								else
									UiColor(1,1,1,alpha)
									UiScale(0.9)
									UiImage("camera-icon-false.png")
								end
							end
						UiPop()
					end
				end
			end
			if inFocus then
				hasTarget = true
				if targetInFocus[target] == nil then
					targetInFocus[target] = true
				end
			else
				if targetInFocus[target] == true then
					inShot = false
					PlaySound(errorSound)
				end
				targetInFocus[target] = false
			end
		end	
		if inShot or not InputDown("usetool") then
			UiPush()
				UiTranslate(UiCenter(), UiMiddle())
				UiAlign("center middle")
				if hasTarget then
					UiColor(0.7,1,0.7)
				end
				UiScale(1-focusTimer*0.5)
				UiImage("camera-mc.png")
			UiPop()
		end
	end
end