package processing.mode.java;

import java.util.List;

import java.util.OptionalInt;

import java.util.stream.IntStream;

import processing.app.Problem;

import processing.app.ui.Editor;

import processing.mode.java.preproc.PdePreprocessIssue;

/**

* Factory which helps create {Problem}s during preprocessing.

*/

public class ProblemFactory {

/**

* Create a new {Problem}.

*

* @param pdePreprocessIssue The preprocess issue found.

* @param tabStarts The list of line numbers on which each tab starts.

* @param editor The editor in which errors will appear.

* @return Newly created problem.

*/

public static Problem build(PdePreprocessIssue pdePreprocessIssue, List<Integer> tabStarts,

int numLines, Editor editor) {

int line = pdePreprocessIssue.getLine();

// Sometimes errors are reported one line past end of sketch. Fix that.

if (line >= numLines) {

line = numLines - 1;

}

// Get local area

TabLine tabLine = getTab(tabStarts, line);

int tab = tabLine.getTab();

int localLine = tabLine.getLineInTab(); // Problems emitted in 0 index

// Generate syntax problem

String message = pdePreprocessIssue.getMsg();

int lineStart = editor.getLineStartOffset(localLine);

int lineStop = editor.getLineStopOffset(localLine) - 1;

if (lineStart == lineStop) {

lineStop++;

}

return new SyntaxProblem(

tab,

localLine,

message,

lineStart,

lineStop

);

}

/**

* Create a new {Problem}.

*

* @param pdePreprocessIssue The preprocess issue found.

* @param tabStarts The list of line numbers on which each tab starts.

* @return Newly created problem.

*/

public static Problem build(PdePreprocessIssue pdePreprocessIssue, List<Integer> tabStarts) {

int line = pdePreprocessIssue.getLine();

TabLine tabLine = getTab(tabStarts, line);

int tab = tabLine.getTab();

int localLine = tabLine.getLineInTab();

int col = pdePreprocessIssue.getCharPositionInLine();

String message = pdePreprocessIssue.getMsg();

if (col == 0) {

col = 1;

}

return new SyntaxProblem(

tab,

localLine,

message,

localLine,

localLine + col

);

}

/**

* Get the local tab and line number for a global line.

*

* @param tabStarts The lines on which each tab starts.

* @param line The global line to locate as a local line.

* @return The local tab number and local line number.

*/

protected static TabLine getTab(List<Integer> tabStarts, int line) {

OptionalInt tabMaybe = IntStream.range(0, tabStarts.size())

.filter((index) -> line >= tabStarts.get(index))

.max();

int tab = tabMaybe.orElse(0);

int localLine = line - tabStarts.get(tab);

return new TabLine(tab, line, localLine);

}

}