if not nrequire then return end
local meta = FindMetaTable("Player")
local rockdata = {
	{nil,0},
	{"Stone" , 15},
	{"Copper" , 30},
	{"Tin" , 60},
	{"Iron" , 120},
	{"Coal" , 180},
}

local skil = nrequire("sh_skillcommon.lua")
skil.RegisterSkill({"Forageing","Mineing"})

local function printpuzzle(puzzle)
	Msg("========================")
	for y = 0, puzzle.height-1 do
		for x = 0, puzzle.width-1 do
			Msg(puzzle.tiles[x][y])
		end
		Msg("\n")
	end
end

local function findmatchesfortile(puzzle,x,y)
	printpuzzle(puzzle)
	local matches = {}
	local pt = puzzle.tiles
	local t = pt[x][y]
	--Find horizontal matches
	local matcheshoizontal = 1
	local cursor = x + 1
	local pot = {{x,y}}
	while cursor < puzzle.width and pt[cursor][y] == t do
		matcheshoizontal = matcheshoizontal + 1
		pot[#pot + 1] = {cursor,y}
		cursor = cursor + 1
	end
	cursor = x - 1
	while cursor >= 0 and pt[cursor][y] == t do
		matcheshoizontal = matcheshoizontal + 1
		pot[#pot + 1] = {cursor,y}
		cursor = cursor - 1
	end
	if matcheshoizontal > 2 then
		for k,v in ipairs(pot) do
			matches[#matches+1] = v
		end
	end
	
	--Find verticle matches
	local matchesverticle = 1
	cursor = y + 1
	pot = {{x,y}}
	while cursor < puzzle.height and pt[x][cursor] == t do
		matchesverticle = matchesverticle + 1
		pot[#pot + 1] = {x,cursor}
		cursor = cursor + 1
	end
	cursor = y - 1
	while cursor >= 0 and pt[x][cursor] == t do
		matchesverticle = matchesverticle + 1
		pot[#pot + 1] = {x,cursor}
		cursor = cursor - 1
	end
	if matchesverticle > 2 then
		for k,v in ipairs(pot) do
			matches[#matches+1] = v
		end
	end
	return matches
end

local function canswitch(puzzle,x1,y1,x2,y2)
	if x1 == x2 and (y1 + 1 == y2 or y1 - 1 == y2) or
	   y1 == y2 and (x1 + 1 == x2 or x1 - 1 == x2) then
	   	local v1 = puzzle.tiles[x1][y1]
	   	local v2 = puzzle.tiles[x2][y2]
	   	local tcpy = table.Copy(puzzle)
	   	tcpy.tiles[x2][y2] = v1
	   	tcpy.tiles[x1][y1] = v2
	   	printpuzzle(tcpy)
		local m1 = findmatchesfortile(tcpy,x1,y1)
		local m2 = findmatchesfortile(tcpy,x2,y2)
		return #m1 > 0 or #m2 > 0
	end
	return false
end

local oremap = {
	[0] = "materials/svg/faithtoken/originals/svg/000000/transparent/ore.svg",
	"materials/svg/lorc/originals/svg/000000/transparent/rock.svg",
	"materials/svg/lorc/originals/svg/000000/transparent/stone-block.svg",
	"materials/svg/faithtoken/originals/svg/000000/transparent/minerals.svg",
	"materials/svg/delapouite/originals/svg/000000/transparent/stone-pile.svg",
	"materials/svg/lorc/originals/svg/000000/transparent/fossil.svg"
	
}

if SERVER then
	local itm = nrequire("item.lua")
	
	for k,v in pairs(oremap) do
		resource.AddSingleFile(v)
	end
	
	util.AddNetworkString("artery_mine_rock_start")
	util.AddNetworkString("artery_mine_rock_new")
	util.AddNetworkString("artery_mine_rock_quit")
	util.AddNetworkString("artery_mine_rock_action")
	util.AddNetworkString("artery_mine_rocks_update")
	
	local function genpuzzle(width,height,variety)
		local puzzle = {}
		puzzle.width = width
		puzzle.height = height
		puzzle.variety = variety
		puzzle.tiles = {}
		
		for i = 0,puzzle.width do
			puzzle.tiles[i] = {}
			for j = 0,puzzle.height do
				puzzle.tiles[i][j] = math.random(0,puzzle.variety)
			end
		end
		
		return puzzle
	end
	
	local function del_and_replace(puzzle,matches)
		local tp = puzzle.tiles
		local function dropcolumn(x,y,spaces)
			print("dropping ", x,y)
			for ty = y, 0, -1 do
				tp[x][ty] = tp[x][ty - spaces] or math.random(0,puzzle.variety)
			end
		end
		for k,v in pairs(matches) do
			dropcolumn(v[1],v[2],1)
		end
	end
	
	
	
	local function findmatchesfor(puzzle)
		local duped = {}
		for i = 0, puzzle.width-1 do
			duped [i] = {}
		end
		for y = 0,puzzle.height-1 do
			for x = 0, puzzle.width-1 do
				local matches = findmatchesfortile(puzzle,x,y)
				for k,v in pairs(matches) do
					duped[v[1]][v[2]] = true
				end
			end
		end
		local m = {}
		for y = 0,puzzle.height-1 do
			for x = 0, puzzle.width-1 do
				if duped[x][y] then
					m[#m+1] = {x,y}
				end
			end
		end
		return m
	end
	
	local puzzles = {}
	local scores = {}
	function meta:MineRock()
		local p = genpuzzle(5,5,4)
		local m = findmatchesfor(p)
		while #m > 0 do
			del_and_replace(p,m)
			m = findmatchesfor(p)
		end
		puzzles[self] = p
		scores[self] = 0
		self:StartAnimation("stranded_mine_rocks")
		net.Start("artery_mine_rock_start")
		net.WriteTable(p)
		net.Send(self)
	end
	
	local function kick_cheating_player(who)
		error(who:Nick() .. " was cheating!")
	end
	
	net.Receive("artery_mine_rock_action",function(ln,ply)
		local p = puzzles[ply]
		local x1 = net.ReadUInt(8)
		local y1 = net.ReadUInt(8)
		local x2 = net.ReadUInt(8)
		local y2 = net.ReadUInt(8)
		if not canswitch(p,x1,y1,x2,y2) then
			kick_cheating_player(ply)
		end
		local v1,v2 = p.tiles[x1][y1],p.tiles[x2][y2]
		p.tiles[x2][y2] = v1
		p.tiles[x1][y1] = v2
		local m = findmatchesfor(p)
		while #m > 0 do
			scores[ply] = scores[ply] + #m
			del_and_replace(p,m)
			m = findmatchesfor(p)
		end
		printpuzzle(p)
		net.Start("artery_mine_rocks_update")
		net.WriteTable(p)
		net.WriteDouble(scores[ply])
		net.Send(ply)
		ply:StartAnimation("stranded_mine_rock")
	end)
	
	net.Receive("artery_mine_rock_quit",function(ln,ply)
		local s = scores[ply]
		local cursor = 1
		while cursor <= #rockdata and s >= rockdata[cursor][2] do
			cursor = cursor + 1
		end
		local n = rockdata[cursor-1][1]
		if n == nil then return end
		local togive = itm.GetItemByName(n)
		ply:GiveItem(togive)
		ply:AddSkill("Mineing",s)
		ply:StopAnimation("stranded_mine_rock")
	end)
else
	local svg = nrequire("cl_svg.lua")

	local mine = {}
	local tbl
	local puzzleview
	local rocks = {}

	local oremats = {}
	for k,v in pairs(oremap) do
		oremats[k] = svg.MaterialFromSVG(v,nil,"rgb(0,0,0);")
	end
	local oremats_selected = {}
	for k,v in pairs(oremap) do
		oremats_selected[k] = svg.MaterialFromSVG(v,"rgb(100,100,200);","rgb(255,255,255);")
	end
	net.Receive("artery_mine_rock_start",function()
		tbl = net.ReadTable()
		puzzleview = vgui.Create( "DFrame" )
		puzzleview:SetSize( ScrW()*0.5, ScrH()*0.5 )
		puzzleview:Center()
		puzzleview:SetTitle( "Mine Rocks..." )
		puzzleview:SetDraggable( true )
		puzzleview:MakePopup()
		puzzleview.OnClose = function(self)
			net.Start("artery_mine_rock_quit")
			net.SendToServer()
		end
		
		local puzzlepane = vgui.Create( "DPanel", puzzleview )
		puzzlepane:Dock(FILL)
		
		local help = vgui.Create("DLabel",puzzlepane)
		help:SetText("Click two cells to switch them.\nCreate runs of 3 or more to clear them from the board\nNew numbers come in from the top\nQuit at any time to receive the resource you have worked towards.")
		help:SetDark(true)
		help:SizeToContents()
		help:Dock(RIGHT)
		
		local rocklayout = vgui.Create("DPanel",puzzlepane)
		rocklayout:Dock(BOTTOM)
		
		local rockprogress = vgui.Create( "DProgress",rocklayout )
		rockprogress:Dock(FILL)
		
		local rocknameleft = vgui.Create("DLabel",rocklayout)
		rocknameleft:Dock(LEFT)
		rocknameleft:SetDark(true)
		rocknameleft:SetText("")
		
		local rocknameright = vgui.Create("DLabel",rocklayout)
		rocknameright:Dock(RIGHT)
		rocknameright:SetDark(true)
		rocknameright:SetText(rockdata[2][1])
		
		rocks = {rockprogress,rocknameleft,rocknameright}
		
		local puzzlegrid = vgui.Create( "DGrid", puzzlepane )
		puzzlegrid:SetCols(tbl.width)
		puzzlegrid:Dock(TOP)
		local selected
		for y = 0,tbl.height-1 do
			for x = 0,tbl.width-1 do
				local tile = vgui.Create("DImageButton")
				mine[x] = mine[x] or {}
				mine[x][y] = tile
				local tmat = oremats[tbl.tiles[x][y]]
				if tmat.material then
					tile:SetMaterial(tmat.material)
				end
				tile:SetStretchToFit( true )
				tile.position = {x,y}
				tile:SetWidth(32)
				tile:SetHeight(32)
				tile:SetIsToggle(true)
				tile.OnToggled = function(self,state)
					if state then
						self:SetMaterial(oremats_selected[tbl.tiles[x][y]].material)
					else
						self:SetMaterial(oremats[tbl.tiles[x][y]].material)
					end
				end
				tile.DoClick = function(self)
					if selected == nil then
						selected = self
						self:SetToggle(true)
						self:OnToggled(true)
					elseif selected ~= self then
						--Check if we can switch
						local sp = selected.position
						local tp = self.position
						if canswitch(tbl,sp[1],sp[2],tp[1],tp[2]) then
							net.Start("artery_mine_rock_action")
							net.WriteUInt(sp[1],8)
							net.WriteUInt(sp[2],8)
							net.WriteUInt(tp[1],8)
							net.WriteUInt(tp[2],8)
							net.SendToServer()
							local v1,v2 = selected:GetText(),self:GetText()
							selected:SetText(v2)
							self:SetText(v1)
							selected:SetToggle(false)
							selected:OnToggled(false)
							selected = nil
						end
					else
						selected:SetToggle(false)
						selected:OnToggled(false)
						selected = nil
					end
				end
				puzzlegrid:AddItem(tile)
			end
		end
			
	end)
	
	net.Receive("artery_mine_rocks_update",function()
		tbl = net.ReadTable()
		local score = net.ReadDouble()
		puzzleview:SetTitle("Mine Rocks... (" .. score .. ")")
		printpuzzle(tbl)
		for y = 0, tbl.height-1 do
			for x = 0, tbl.width-1 do
				mine[x][y]:SetMaterial(oremats[(tbl.tiles[x][y])].material)
			end
		end
		if score > rockdata[#rockdata][2] then
			puzzleview:Close()
			return
		end
		for k,v in ipairs(rockdata) do
			if score >= v[2] then
				local l = v[2]
				local n = rockdata[k+1][2]
				local frac = (score-l) / (n - l)
				rocks[1]:SetFraction(frac)
				rocks[2]:SetText(v[1] or "")
				rocks[3]:SetText(rockdata[k+1][1])
			end
		end
	end)
	
end