--[[
]]

growth = growth or {}
stable = stable or {}
local meta_g = {}
local meta_s = {}

function growth.new(place,pop,tph, houseprice)
        local town = {}
        town["place"] = place
        town["pop"] = pop
        town["tph"] = tph
        town["houseprice"] = houseprice
        town["getfact"] = growth.getfactor
        town["addpeeps"] = addpeeps
        town["wastage"] = wastage
        setmetatable(town,meta_g)
        return town
        end

function stable.new(place,pop,tph, houseprice)
        local town = {}
        town["place"] = place
        town["pop"] = pop
        town["tph"] = tph
        town["houseprice"] = houseprice
        town["getfact"] = stable.getfactor
        town["addpeeps"] = addpeeps
        town["wastage"] = wastage
        setmetatable(town,meta_s)
        return town
        end

function growth.getfactor(self)
        return self.pop / self.houseprice * (4 +self.tph)
        end

function stable.getfactor(self)
        return self.pop / self.houseprice * (2 +self.tph)
        end

function growth.print(self)
        return self.place .. " " .. self.pop .. " growing FAST!"
        end

function stable.print(self)
        return self.place .. " " .. self.pop .. " STABLE"
        end

function addpeeps(self,extra)
        self.pop = self.pop + extra
        end

function wastage(self)
        self.pop = self.pop * 0.99
        end

meta_g.__tostring = growth.print
meta_s.__tostring = stable.print

function gettowns()
fh,err = io.open("town_sim.txt")
towns = {}

while true do
        line = fh:read()
        if not line then break end
        line = string.gsub(line,"#.*","")
        if string.match(line,"%S") then
                line = string.gsub(line,"^%s*","")
                -- print (line)
                place, pop, rss_type, tph, houseprice = string.match(line ,"(.-)\t+(.-)\t+(.-)\t+(.-)\t+(.*)")
                -- print (place,houseprice)

                if rss_type == "growth" then
                        current = growth.new(place,pop,tph, houseprice)
                elseif rss_type == "stable" then
                        current = stable.new(place,pop,tph, houseprice)
                else
                        io.write ("Data error")
                        current = nil
                end
                if current then
                        towns[#towns+1] = current
                end
        end
end
return towns
end