-- roam
-- by dotcomboom

-- init functions

function clear()
	for i=1, 30 do
		print()
	end
end

function new_region()
			regions[currentregion] = {}
			regions[currentregion][1] = areas[math.random(#areas)]
			regions[currentregion][2] = ''
			regions[currentregion][3] = ''
end
function new_item_mob()
			rarea = regions[currentregion][1]
			ritem = ''
			if rarea == 'forest' then
				if math.random(4) == 1 then
					ritem = 'log'
				end
			elseif rarea == 'desert' then
				if math.random(3) == 1 then
					ritem = 'cactus'
				end
			end
			regions[currentregion][2] = ritem
			rmob = ''
			if rarea == 'plains' then
				r = math.random(4)
				-- 1: no mob
				if r == 2 then
					rmob = 'pig'
				elseif r == 3 then
					rmob = 'sheep'
				end
			elseif rarea == 'hills' then
				if math.random(3) == 1 then
					rmob = 'goat'
				end
			end
			regions[currentregion][3] = rmob
end

-- init variables

areas = {'forest', 'desert', 'plains', 'hills', 'town'}

regions = { }
		 
inventory = {}

currentregion = 1
new_region()
new_item_mob()

coins = 0

math.randomseed(os.time())

-- start

print([[  ___                 ]])
print([[ | _ \___  __ _ _ __  ]])
print([[ |   / _ \/ _` | '  \ ]])
print([[ |_|_\___/\__,_|_|_|_|]])

print()
print()

while true do

	print('You are in region ' .. currentregion .. '.')
	if #regions == currentregion then
		print("You haven't been here before.")
		print()
	end
	print('It is a ' .. regions[currentregion][1] .. ' area.')
	
	if regions[currentregion][2] == '' then else
		print('You picked up: ' .. regions[currentregion][2] .. '.')
		inventory[#inventory + 1] = regions[currentregion][2]
		regions[currentregion][2] = ''
		print()
	end
	if regions[currentregion][3] == '' then else
		print('There is a ' .. regions[currentregion][3] .. ' near.')
	end
	if regions[currentregion][1] == 'town' then
		print('Activity is bustling here.')
	end
	
	print()
	
	if #inventory > 0 then
		print('Inventory:')
	

		for key, value in pairs(inventory) do
			print('  ' .. value)
		end
	else
		print('Your pockets seem to be empty at the moment.')
	end
	
	print()
	print('You have ' .. coins .. ' coins on hand.')
	print()
	print('Will you...')
	print()
	print('Go [O]nward?')
	if currentregion > 1 then
		print('[B]acktrack?')
	end
	print('[V]iew your map?')
	if regions[currentregion][1] == 'town' then
		print('[T]rade with the townsfolk?')
	end
	
	option = string.lower(io.read())
	
	if option == 'o' then
		currentregion = currentregion + 1
		
		if currentregion > #regions then
		
			new_region()
			new_item_mob()
	
		end
	elseif option == 'b' then
		if currentregion > 1 then
			currentregion = currentregion - 1
			new_item_mob()
		end
	end
	
	clear()
	
	if option == 'v' then
		print("Let's see here..")
		print()
		out = ''
		for key, value in pairs(regions) do
			out = out .. key .. ": " .. value[1] .. " area..   "
		end
		print(out)
		print()
		print('Press ENTER.')
		io.read()
		clear()
	elseif option == 't' then
		if regions[currentregion][1] == 'town' then
			print('Welcome to the town marketplace.')
			if #inventory > 0 then
				print('Inventory:')
				for key, value in pairs(inventory) do
					print('  ' .. value)
				end
			else
				print('Your pockets seem to be empty at the moment.')
			end
			print()
			print('Would you like to..')
			print('[B]uy?')
			print('[S]ell?')
			
			o2 = string.lower(io.read())
			print()
			if o2 == 'b' then
				print("There doesn't seem to be any offers..")
			elseif o2 == 's' then
				print("Log sale price is 2 coins.")
				print("Cactus sale price is 1 coin.")
				print()
				print("What do you want to sell?")
				o3 = string.lower(io.read())
				print()
				amnt = 0
				profit = 0
				-- this is funky because I need to do it back to front instead
				-- of front to back, in order to get all the items since
				-- table.remove is involved
				for i=#inventory,1,-1 do
					
					key = i
					value = inventory[i]
					
					if value == o3 then
						table.remove(inventory, key)
						amnt = amnt + 1
						if o3 == "log" then
							profit = profit + 2
						elseif o3 == "cactus" then
							profit = profit + 1
						end
					end
				end
				coins = coins + profit
				if profit == 1 then
				print(amnt .. ' ' .. o3 .. ' items sold for a total of ' .. profit .. ' coin.')
				else
				print(amnt .. ' ' .. o3 .. ' items sold for a total of ' .. profit .. ' coins.')
				end
				print()
				print('Press ENTER.')
				io.read()
			end
			clear()
		end
	end
end