=begin

autofarm
========
Automatically handle crop selection in farm plots based on current plant stocks.
Selects a crop for planting if current stock is below a threshold.
Selected crops are dispatched on all farmplots.

Usage::

    autofarm start
    autofarm default 30
    autofarm threshold 150 helmet_plump tail_pig

=end
class AutoFarm

    def initialize
        @thresholds = Hash.new(50)
        @lastcounts = Hash.new(0)
    end

    def setthreshold(id, v)
        list = df.world.raws.plants.all.find_all { |plt| plt.flags[:SEED] }.map { |plt| plt.id }
        if tok = df.match_rawname(id, list)
            @thresholds[tok] = v.to_i
        else
            puts "No plant with id #{id}, try one of " +
                list.map { |w| w =~ /[^\w]/ ? w.inspect : w }.sort.join(' ')
        end
    end

    def setdefault(v)
        @thresholds.default = v.to_i
    end

    def is_plantable(plant)
        has_seed = plant.flags[:SEED]
        season = df.cur_season
        harvest = df.cur_season_tick + plant.growdur * 10
        will_finish = harvest < 10080
        can_plant = has_seed && plant.flags[season]
        can_plant = can_plant && (will_finish || plant.flags[(season+1)%4])
        can_plant
    end

    def find_plantable_plants
        plantable = {}
        counts = Hash.new(0)

        df.world.items.other[:SEEDS].each { |i|
            if (!i.flags.dump && !i.flags.forbid && !i.flags.garbage_collect &&
                !i.flags.hostile && !i.flags.on_fire && !i.flags.rotten &&
                !i.flags.trader && !i.flags.in_building && !i.flags.construction &&
                !i.flags.artifact)
                counts[i.mat_index] += i.stack_size
            end
        }

        counts.keys.each { |i|
            if df.ui.tasks.discovered_plants[i]
                plant = df.world.raws.plants.all[i]
                if is_plantable(plant)
                    plantable[i] = :Surface     if (plant.underground_depth_min == 0 || plant.underground_depth_max == 0)
                    plantable[i] = :Underground if (plant.underground_depth_min > 0 || plant.underground_depth_max > 0)
                end
            end
        }

        return plantable
    end

    def set_farms(plants, farms)
        return if farms.length == 0
        if plants.length == 0
            plants = [-1]
        end

        season = df.cur_season

        farms.each_with_index { |f, idx|
            f.plant_id[season] = plants[idx % plants.length]
        }
    end

    def process
        plantable = find_plantable_plants
        @lastcounts = Hash.new(0)

        df.world.items.other[:PLANT].each { |i|
            if (!i.flags.dump && !i.flags.forbid && !i.flags.garbage_collect &&
                !i.flags.hostile && !i.flags.on_fire && !i.flags.rotten &&
                !i.flags.trader && !i.flags.in_building && !i.flags.construction &&
                !i.flags.artifact && plantable.has_key?(i.mat_index))
                id = df.world.raws.plants.all[i.mat_index].id
                @lastcounts[id] += i.stack_size
            end
        }

        return unless @running

        plants_s = []
        plants_u = []

        plantable.each_key { |k|
            plant = df.world.raws.plants.all[k]
            if (@lastcounts[plant.id] < @thresholds[plant.id])
                plants_s.push(k) if plantable[k] == :Surface
                plants_u.push(k) if plantable[k] == :Underground
            end
        }

        farms_s = []
        farms_u = []
        df.world.buildings.other[:FARM_PLOT].each { |f|
            if (f.flags.exists)
                underground = df.map_designation_at(f.centerx,f.centery,f.z).subterranean
                farms_s.push(f) unless underground
                farms_u.push(f) if underground
            end
        }

        set_farms(plants_s, farms_s)
        set_farms(plants_u, farms_u)
    end

    def start
        return if @running
        @onupdate = df.onupdate_register('autofarm', 1200) { process }
        @running = true
    end

    def stop
        df.onupdate_unregister(@onupdate)
        @running = false
    end

    def status
        stat = @running ? "Running." : "Stopped."
        @lastcounts.each { |k,v|
            stat << "\n#{k} limit #{@thresholds.fetch(k, 'default')} current #{v}"
        }
        @thresholds.each { |k,v|
            stat << "\n#{k} limit #{v} current 0" unless @lastcounts.has_key?(k)
        }
        stat << "\nDefault: #{@thresholds.default}"
        stat
    end

end

$AutoFarm ||= AutoFarm.new

case $script_args[0]
when 'start', 'enable'
    $AutoFarm.start
    puts $AutoFarm.status

when 'end', 'stop', 'disable'
    $AutoFarm.stop
    puts 'Stopped.'

when 'default'
    $AutoFarm.setdefault($script_args[1])

when 'threshold'
    t = $script_args[1]
    $script_args[2..-1].each {|i|
        $AutoFarm.setthreshold(i, t)
    }

when 'delete'
    $AutoFarm.stop
    $AutoFarm = nil

when 'help', '?'
    puts <<EOS
Automatically handle crop selection in farm plots based on current plant stocks.
Selects a crop for planting if current stock is below a threshold.
Selected crops are dispatched on all farmplots.

Usage:
 autofarm start
 autofarm default 30
 autofarm threshold 150 helmet_plump tail_pig
EOS

else
    $AutoFarm.process
    puts $AutoFarm.status
end