-module(click_handler).%% th 2011-08-11: converting to a flat module to get the basics to work.%%-behaviour(gen_event).

%% -export([start/1, stop/0]).%% -export([init/1, handle_event/2, code_change/3, handle_call/2, handle_info/2,terminate/2]).

-include("backend_log.hrl").

-export([process_click/1]).

process_click({MessageId, {struct, [_|_] = ClickData}}) -> try ClickDict = dict:from_list(ClickData), Timestamp = dict:fetch(<<"timestamp">>, ClickDict), AdId = dict:fetch(<<"ad_id">>, ClickDict), PriceOrig = dict:fetch(<<"price">>, ClickDict), IP = dict:fetch(<<"ip_number">>, ClickDict), ?log_info("Click ~p received at ~b for ~s from ~s with price of ~b",[MessageId, Timestamp, AdId, IP, PriceOrig]), Q = "select _user, _account, campaign_id from AdGroup whereadgroup_id='~s'", Query = lists:flatten(io_lib:format(Q, [AdId])), case backend_sdb:select(Query) of {ok, _, [{_, CampaignData}], _} -> Dict = dict:from_list(CampaignData), CampaignId = dict:fetch(<<"campaign_id">>, Dict), ?log_info("Click arrived for campaign: ~p", [CampaignData]),

case campaign:process_action(CampaignId,{click,PriceOrig}) of {ok, PriceCampaign} -> UserData = {dict:fetch(<<"_user">>, Dict),dict:fetch(<<"_account">>, Dict)}, case ad_user:process_action(UserData, {click,PriceCampaign}) of {ok, OverCharged} when is_integer(OverCharged) -> ?log_info("Overcharged happened: ~p ~b",[{UserData,CampaignId, AdId}, OverCharged]), RealPrice = PriceCampaign-OverCharged, send_click(AdId, RealPrice), case OverCharged > 0 of true -> case campaign:process_action(CampaignId,{overcharged, OverCharged}) of ok -> ?log_info("Overcharged processed:~p ~b", [MessageId, OverCharged]); {error, Error} -> ?log_error("Failed to processovercharge: ~p ~b ~p", [MessageId,OverCharged, Error]) end; false -> no_action

end; {error, Error} -> ?log_error("Failed to charge ~p ~b -> ~p",[MessageId, PriceCampaign, Error]) end; {error, Error} -> ?log_error("Failed to process click: ~p. ~p", [MessageId,Error]) end; Error -> ?log_info("Error processing click for ~s: ~p", [AdId, Error]) end catch E11:E12 -> ?log_error("~p:~p ~p", [E11, E12, ClickData]) end, ok.

%% process_click({MessageId, {struct, [_|_] = ClickData}}) ->%% try%% ClickDict = dict:from_list(ClickData),%% Timestamp = dict:fetch(<<"timestamp">>, ClickDict),%% AdId = dict:fetch(<<"ad_id">>, ClickDict),%% PriceOrig = dict:fetch(<<"price">>, ClickDict),%% IP = dict:fetch(<<"ip_number">>, ClickDict),%% ?log_info("Click ~p received at ~b for ~s from ~s with price of ~b",[MessageId, Timestamp, AdId, IP, PriceOrig]),%% Q = "select _user, _account, campaign_id from AdGroup whereadgroup_id='~s'",%% Query = lists:flatten(io_lib:format(Q, [AdId])),%% case backend_sdb:select(Query) of%% {ok, _, [{_, CampaignData}], _} ->%% Dict = dict:from_list(CampaignData),%% CampaignId = dict:fetch(<<"campaign_id">>, Dict),%% ?log_info("Click arrived for campaign: ~p", [CampaignData]),

%% MainProc = self(),%% {ok, Super} = supervisor:start_link(fsm_sup, []),%% try%% succeed_or_retry(Super, campaign_price,%% fun() ->%% {ok, CSM} =campaign_fsm:start_link(CampaignId),%% Result1 =gen_fsm:sync_send_event(CSM, {click, PriceOrig}),%% %gen_fsm:send_all_state_event(CSM,stop),%% case Result1 of%% {ok, PriceCampaign} -> MainProc! {ok, PriceCampaign}%% end%% end%% ),%% receive

%% {ok, PriceCampaign} ->%% succeed_or_retry(Super, account_price,%% fun() ->%% {ok, USM} =user_fsm:start_link({dict:fetch(<<"_user">>, Dict), dict:fetch(<<"_account">>,Dict)}),%% Result2 =gen_fsm:sync_send_event(USM, {click, PriceCampaign}),%% %gen_fsm:send_all_state_event(USM,stop),%% case Result2 of%% {ok, OverCharged} ->MainProc ! {ok, OverCharged}%% end%% end%% ),%% receive%% {ok, OverCharged} when is_integer(OverCharged)->%% RealPrice = PriceCampaign-OverCharged,%% send_click(AdId, RealPrice),%% case OverCharged > 0 of%% true ->%% succeed_or_retry(Super,overcharged_campaign,%% fun() ->%% caseOverCharged > 0 of%% false ->%% MainProc ! ok;%% true ->%% {ok,CSM} = campaign_fsm:start_link(CampaignId),%% Result3 = gen_fsm:sync_send_event(CSM, {overcharged, OverCharged}),%% %gen_fsm:send_all_state_event(CSM,stop),%% caseResult3 of%% ok -> MainProc ! ok%% end%% end%% end%% ),%% receive%% ok -> ?log_info("Overchargedprocessed: ~p ~b", [MessageId, OverCharged])%% after 30000 ->%% ?log_error("Failed to processovercharge: ~p ~b", [MessageId, OverCharged])%% end;%% _ ->%% no_action%% end;

%% {error, Error} ->%% ?log_error("Failed to charge ~p ~b -> ~p",[MessageId, PriceCampaign, Error])%% end%% after 30000 ->%% ?log_error("Failed to process click: ~p",[MessageId]),%% error%% end%% catch%% E1:E2 ->%% ?log_error("~p:~p", [E1, E2])%% end,%% ?log_info("supervisor:count_children -> ~p",[supervisor:count_children(Super)]),%% exit(Super, kill);%% Error ->%% ?log_info("Error processing click for ~s: ~p", [AdId, Error])%% end%% catch%% E11:E12 ->%% ?log_error("~p:~p ~p", [E11, E12, ClickData])%% end,%% ok.

%% succeed_or_retry(Supervisor, Name, Function) ->%% {ok, _} = supervisor:start_child(Supervisor, {Name, {fsm_transaction,start_link, [Function]}, transient, 15000, worker, [fsm_transaction]}).

send_click(AdId, Price) -> Stat = util:config(backend_admgr, stat_url), Timeout = util:config(backend_admgr, timeout, 10000), Req = lists:flatten(io_lib:format(Stat, [AdId, Price])), case ibrowse:send_req(Req, [], get, [], [], Timeout) of {error, Reason} -> ?log_error("Failed to send click to statistics: ~s ~p", [Req,Reason]); Response-> ?log_info("Click sent to statistics with ok ~s~n~p", [Req, Response]) end.