function demo_cf(subjCode, cfVersion, skipSyncTest, varargin)
% demo_cf(subjCode, cfVersion, skipSyncTest, varargin)
%
% This function runs the different versions of composite face tasks.
%
% Inputs:
%    subjCode      <int> subject code.
%    cfVersion     <str> the version of the composite face task.
%                   'scf' -- standard composite face task (partial design);
%                   'cf' -- complete design (without cues);
%                   'ccf' -- complete design (with cues);
%                   Default is 'cf'.
%    skipSyncTest  <boo> 0 [default]: do not skip the sync test in
%                   PsychToolbox. 1: skip the test.
%
% Created by Haiyang Jin (5-Feb-2019).

% add the functions folder to the path
clc;
funcFolers = {'PTB/', 'ImageTools/', 'Utilities/', 'custom/cf_funcs/'};
cellfun(@addpath, funcFolers);
% addpath(genpath('functions/'));

% Deal with inputs
if ~exist('subjCode', 'var')
    subjCode = '000';
elseif isnumeric(subjCode)  % the subjCode should be a string
    subjCode = num2str(subjCode);
end

if strcmp(subjCode, '0')
    param.isDebug = 1;
    warning(['Debug mode is on... \nThe subjCode is %s.\n' ...
        'Data will not be saved.'], subjCode);
else
    param.isDebug = 0;
end
param.subjCode = subjCode;

% version of composite task
if ~exist('cfVersion', 'var') || isempty(cfVersion)
    cfVersion = 'ccf';
end
param.cfversion = cfVersion;
fprintf('\nComposite task version: %s.\n', param.cfversion);

switch param.cfversion
    case {'scf', 'cf'}
        isTopCued = 1;
        % same congruent and different incongurent will be removed later
        % for 'scf'.
        showCue = 0;
    case 'ccf'
        isTopCued = 0:1;
        showCue = 1;
end

% skip the sync test
if ~exist('skipSyncTest', 'var') || isempty(skipSyncTest)
    skipSyncTest = 0;
end
param.SkipSyncTests = skipSyncTest;  % will skip in debug mode

%% Stimuli
% faces
stimPath = fullfile('custom/stimuli/CF_LineFaces', filesep); % CF_LineFaces
param.imgDir = im_dir(stimPath, {'png'}, 1);
param.nFacePerGroup = 4;
nGroup = numel(unique({param.imgDir.condition}));  % number of groups (folders)

param.alpha = 1;  % 0: transparent; 1: opaque

% scrambled masks
maskPath = fullfile('custom/stimuli/CF_LineMasks', filesep); % CF_LineMasks
param.maskDir = im_dir(maskPath, {'png'});

%% Experiment inforamtion
param.expCode = '999';
param.expAbbv = 'CF';

% experiment design (ed)
clear param.conditionsArray;
param.conditionsArray = {...
    'isUpright', 1; ... % 1 = upright; 0 = inverted
    'isTestAligned', 0:1; ... % 0 = misaligned; 1 = aligned
    'isTopCued', isTopCued;... %  0 = bottom is cued; 1 = top is cued
    'isCongruent', 0:1;...  % 0 = incongruent; 1 = congruent
    'isCuedSame', 0:1; ... % 0 = different; 1 = same
    'faceGroup', 1:nGroup; ... % number of groups
    'faceIndex', 1:4;... % 4 images in each group
    'withinBlockReps', 1; ... %
    'blockNumber', 1; ... %
    };
param.randBlock = '';
param.sortBlock = 'blockNumber';

% Build the experiment design
param.ed = ptb_expdesignbuilder(param.conditionsArray, ...
    param.randBlock, param.sortBlock);
% remove same congruent and different incongruent trials for 'scf'
if strcmp(param.cfversion, 'scf')
    isremove = [param.ed.isCongruent] == [param.ed.isCuedSame];
    param.ed(isremove) = [];
    param.isStudyOffset = 1;  % study composites can be misaligned
else
    param.isStudyOffset = 0;
end
param.tn = size(param.ed, 1);  % trial number

% response keys
param.expKeyName = {'escape', '=+'};
param.instructKeyName = 'q';
respKeyNames = {
    '1', '2';
    '1!', '2@'};

if param.isDebug || strcmp(subjCode, '000'); subjCode = 1; end
param.respKeyNames = ptb_balancekeys(subjCode, respKeyNames); % counterbalance keys

% breaks
param.trialsPerRest = 40;
param.restMinimumTime = 10; % seconds

%% Face Selection
% select face based on condition
% columns: studyTop; studyBottom; targetTop; targetBottom
% rows: top(CS,CD,IS,ID), bottom(CS,CD,IS,ID)
param.faceSelector = ...
    [0 1 0 1 ; % TCS
    0 1 2 3 ; % TCD
    0 1 0 2 ; % TIS
    0 1 3 1 ; % TID
    0 1 0 1 ; % BCS
    0 1 2 3 ; % BCD
    0 1 3 1 ; % BIS
    0 1 0 2]; % BID
% T:top; B:bottom; C:congruent; I:incongruent; S:same; D:different
% 'scf': only use rows [2,3];
% 'cf': only use rows [1:4];
% 'ccf': use rows [1:8].
% Usage:
%   trialType = 1 + 4*(1-ed(ttn).isTopCued) + 2*(1-ed(ttn).isCongruent) + (1-ed(ttn).isCuedSame);
%   thisFaceSet = mod((ed(ttn).faceIndex + faceSelector(trialType,:)-1),4)+1;

%% Trial parameters
% Proportion of top parts
param.topProp = 0.5;

% misaligned percentage
param.misalignPerc = 0.5;

% cues
param.showCue = showCue; % 0: not show cue, 1: show cues
param.cuePixel = 6;
param.cueLength = 1.5; % times of the stimuli (face) width
param.cueSideLength = 22;  % the "hook" part (even number)
param.cuePosition = 22;  % distance from the position to the middle of the screen

% fixations
param.widthFix = 4;
param.lengthFix = 20;
param.fixDuration = 0.5;

% Durations (seconds)
param.blankDuration = 0.5;   % blanks
param.studyDuration = 0.5;   % study faces
param.maskDuration = 0.5;    % masks
param.testDuration = 0.5;    % test faces
param.respMaxDuration = 3;   % maximum response duration (relative to onset of test composite)
param.ITInterval = 0.5;      % interval

% jitter of test composite
param.nOffset = 4; % the jitter is [-4:4] * 5

% whether show feedback
param.isFeedback = 1;

%% Setting for the screen
param.frameExpected = 60;
param.forecolor = 'white';  % (white, black, grey or numbers)
param.backcolor = 'grey';   % (white, black, grey or numbers)
param.winrect = [];         % [] Window Rect; % default [100 100 1300 900];  %[100 100 600 600];
param.whichscreen = [];     % which screen will be used

%% Parameters of fonts used in this exp
param.textSize = 20;
param.textColor = 255;
param.language = 'en';

%% Instruction
if strcmp(param.language, 'en')

    param.textFont = 'Helvetica';
    param.instructText = sprintf(['Welcome to this experiment.'...
        '\n\n\n'...
        'On each trial, you will see two faces, one after the other.'...
        '\n\n'...
        'Please study the first whole face carefully, \n' ...
        'then focus on the cued part of second face (indicated by white brackets) and ignore the other part.'...
        '\n\n\n\n'...
        'If the cued parts of the two consecutive faces are the same,'...
        '\n\n'...
        'please press KEY %s.'...
        '\n\n\n\n'...
        'If the cued parts of the two consecutive faces are different,'...
        '\n\n'...
        'please press KEY %s.'...
        '\n\n\n\n'...
        'Please respond as quickly and accurately as possible. \n\n\n' ...
        'Please let the experimenter know when you are ready.'], ...
        param.respKeyNames{1,1}, param.respKeyNames{1,2});

elseif strcmp(param.language, 'cn')    

    param.textFont = '90'; % Heiti
    param.instructText = double(sprintf([...
        '欢迎参加心理学实验\n\n\n\n' ...
        '在该任务的每一个试次中, 你会依次看到两张面孔。'...
        '\n\n\n'...
        '请认真学习第一张面孔，' ...
        '然后专注第二张面孔中白色方框提示的部分，并忽略其他部分。'...
        '\n\n\n\n'...
        '如果两张面孔中白色方框提示的部分相同,\n\n\n'...
        '请按%s。 \n\n\n\n'...
        '如果两张面孔中白色方框提示的部分不同,\n\n\n'...
        '请按%s。 \n\n\n\n'...
        '请尽量又快又准地做出反应。\n\n\n' ...
        '准备好后请告知实验主试。'...
        ], param.respKeyNames{1,1}, param.respKeyNames{1,2}));

end

%% Define the specific functions
% cf functions
param.do_stim = @cf_stim;  % process stimuli after initializing windows
param.do_trial = @cf_trial; % run trials
param.do_output = @cf_outtable;  % process output

%% Update fieldnames of param with pre-defined values
param = ptb_mergestruct(param, varargin);

%% Run the experiment
ptb_runexp(param);

%% remove path
cellfun(@rmpath, funcFolers);
% rmpath(genpath('functions/'));

end