classdef tPhasePower < matlab.unittest.TestCase
    %TPHASEPOWER Tests for the phased days x tDCS LME (tdcs_phase_lme) and the
    %   Monte-Carlo power analysis (tdcs_power_sim).

    methods (Test)

        function testPhaseEarlyFasterAndSlowDown(testCase)
            % Early phase: Box-B2 slope > Box-A2 slope (faster acquisition) and
            % strong learning; late phase: shallower slopes (fast->slow).
            cfg = tdcs_config();
            evalc('P = tdcs_phase_lme(''mergeA2'', cfg);');   % run in-workspace, suppress print
            early = P.phases{1};   % [0 5]
            late = P.phases{2};    % [6 10]
            testCase.verifyEqual(early.phase, [0 5]);
            testCase.verifyGreaterThan(early.b2Slope, early.a2Slope);   % B2 faster early
            testCase.verifyLessThan(early.dayP, 0.01);                  % strong early learning
            testCase.verifyGreaterThan(early.b2Slope, late.b2Slope);    % slow-down (fast->slow)
            testCase.verifyGreaterThan(early.interEst, 0);              % positive interaction
        end

        function testPhaseSwitchWritesResults(testCase)
            here = fileparts(fileparts(mfilename('fullpath')));  % analysis/matlab
            outFile = fullfile(here, 'results', 'phase_mergeA2.txt');
            if exist(outFile, 'file'); delete(outFile); end
            evalc("tdcs_glm('phase_mergeA2')");
            testCase.verifyTrue(exist(outFile, 'file') == 2);
        end

        function testPowerMonotonicAndBounded(testCase)
            % Small, fast config: power rises with N and stays in [0,1].
            cfg = tdcs_config();
            PW = tdcs_power_sim('mergeA2', [0 5], [4 24], 1.0, 30, cfg);
            testCase.verifyTrue(all(PW.powerPerAnimal >= 0 & PW.powerPerAnimal <= 1));
            testCase.verifyTrue(all(PW.powerLME >= 0 & PW.powerLME <= 1));
            pSmall = PW.powerPerAnimal(PW.N == 4);
            pLarge = PW.powerPerAnimal(PW.N == 24);
            testCase.verifyGreaterThan(pLarge, pSmall);   % more subjects -> more power
        end

    end
end