program task3;

{$APPTYPE CONSOLE}
{$R *.res}

uses
    System.SysUtils, Math, Classes;

type
    Arr = Array of Double;
    TwoDimArr = Array of Arr;

var
    MatrixRows, MatrixCols, VectorLength: Integer;
    VectorType, FilePath: String;
    Vector: Arr;
    Matrix, Product: TwoDimArr;
    InputFile: TextFile;
    NotCorrect: Boolean;

procedure Split(Delimiter: Char; Str: string; ListOfStrings: TStrings);
begin
    ListOfStrings.Clear();
    ListOfStrings.Delimiter := Delimiter;
    ListOfStrings.DelimitedText := Str;
end;

function ReadNextLine(const FileToRead: TextFile): String;
var
    Line: String;
begin
    Line := '';
    try
        Readln(FileToRead, Line);
    except
        Writeln('Возникла ошибка при чтении файла.');
    end;
    ReadNextLine := Line;
end;

procedure ShowMatrix(const Matrix: TwoDimArr);
var
    i, j: Integer;
begin
    for i := 0 to High(Matrix) do
    begin
        for j := 0 to High(Matrix[i]) do
            Write(Matrix[i, j]:5:2, ' ');
        Writeln;
    end;
end;

procedure ShowVector(const Vector: Arr);
var
    i: Integer;
begin
    for i := 0 to High(Vector) do
        Write(Vector[i]:5:2, ' ');
    Writeln;
end;

function TakeRow(Str: String; Size: Integer): Arr;
var
    i, Len, El: Integer;
    Row: Arr;
    NumsStr: String;
    OutputList: TStringList;
begin
    SetLength(Row, Size);
    OutputList := TStringList.Create();
    Split(' ', Str, OutputList);
    Len := Size - 1;
    if (Len = OutputList.Count - 1) then
        for i := 0 to Len do
        begin
            El := StrToInt(OutputList[i]);
            if (El in [0 .. 9]) then
                Row[i] := El;
        end
    else
        Writeln('Количество столбцов, введенных в файле, должно совпадать с количеством столбцов в матрице');

    TakeRow := Row;
end;

function TakeVector(const InputFile: TextFile; var VectorType: String): Arr;
var
    Vector: Arr;
    VectorLength: Integer;
    CurrentString: String;
    NotCorrect, Stop: Boolean;
begin
    NotCorrect := true;
    Stop := false;
    Reset(InputFile);
    while (NotCorrect and (Not Stop)) do
    begin
        if (EOF(InputFile)) then
        begin
            Writeln('Вы не указали тип вектора');
            Stop := true;
        end

        else
        begin
            VectorType := ReadNextLine(InputFile);
            if ((VectorType = 'вектор-столбец') or
                (VectorType = 'вектор-строка')) then
                NotCorrect := false;
        end;
    end;

    if (Not NotCorrect) then
    begin
        VectorLength := StrToInt(ReadNextLine(InputFile));
        SetLength(Vector, VectorLength);
        CurrentString := ReadNextLine(InputFile);
        Vector := TakeRow(CurrentString, VectorLength);
    end;
    TakeVector := Vector;
end;

function TakeMatrixFromFile(const InputFile: TextFile): TwoDimArr;
var
    CurrentString: String;
    MatrixRows, MatrixCols, i: Integer;
    Matrix: TwoDimArr;
    MatrixRow: Arr;
begin
    i := 0;
    Reset(InputFile);

    MatrixRows := StrToInt(ReadNextLine(InputFile));
    MatrixCols := StrToInt(ReadNextLine(InputFile));

    SetLength(Matrix, MatrixRows, MatrixCols);

    while (i < MatrixRows) do
    begin
        CurrentString := ReadNextLine(InputFile);
        MatrixRow := TakeRow(CurrentString, MatrixCols);
        Matrix[i] := MatrixRow;
        i := i + 1;
    end;

    CloseFile(InputFile);
    TakeMatrixFromFile := Matrix;
end;

function TakeProduct(const Matrix: TwoDimArr; const Vector: Arr;
    VectorLength: Integer): TwoDimArr;
var
    i, j, k: Integer;
    Product: TwoDimArr;
begin
    SetLength(Product, VectorLength, Length(Matrix[0]));
    for i := 0 to High(Product) do
        for j := 0 to High(Matrix) do
            for k := 0 to High(Matrix[j]) do
                Product[i, k] := Product[i, k] +
                    Vector[IfThen(VectorLength = 1, j, i)] * Matrix[j, k];

    TakeProduct := Product;
end;

begin
    NotCorrect := true;
    Writeln('Данная программа находит произведение вектора на матрицу');
    Writeln;
    Writeln('Введите путь до файла');
    Readln(FilePath);
    if (FileExists(FilePath)) then
    begin
        AssignFile(InputFile, FilePath);
        Matrix := TakeMatrixFromFile(InputFile);
        Writeln('Матрица:');
        ShowMatrix(Matrix);
        Vector := TakeVector(InputFile, VectorType);
        Writeln('Тип вектора: ', VectorType);
        Writeln('Вектор:');
        ShowVector(Vector);

        MatrixRows := Length(Matrix);
        MatrixCols := Length(Matrix[0]);
        VectorLength := Length(Vector);
        NotCorrect := false;
    end
    else
        Writeln('Указанный вами файл не существует');

    if (Not NotCorrect) then
    begin
        if (((VectorType = 'вектор-столбец') and (MatrixRows <> 1)) or
            ((VectorType = 'вектор-строка') and (MatrixRows <> VectorLength)))
        then
        begin
            Writeln('Число строк в матрице должно быть равно числу столбцов в векторе');
        end
        else
        begin
            if (VectorType = 'вектор-строка') then
                VectorLength := 1;

            SetLength(Product, VectorLength, MatrixCols);
            Product := TakeProduct(Matrix, Vector, VectorLength);

            Writeln('Результат :');
            ShowMatrix(Product);
        end;
    end;

    Readln;
end.