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#include <cinttypes>
#include <fstream>
#include <functional>
#include <iostream>
#include <string>
#include <vector>

#include "codeview.hpp"
#include "udb_cpp.hpp"

using namespace finalcut;

CodeView::CodeView(finalcut::FWidget *parent)
  : FDialog{ parent }
{
    setResizeable();
    scrolltext.ignorePadding();
    scrolltext.setFocus();

    FString instrStr;
    char asmStr[40];

    FTextView::FTextViewList::size_type line = 0;
    for (uint64_t addr = 0; addr < ulm_brk; addr += 4, ++line) {
        uint32_t instr;
        ulm_fetch32(addr, &instr);
        ulm_asm(instr, asmStr, sizeof(asmStr));

        instrStr.sprintf("    0x%016" PRIX64 ": %02X %02X %02X %02X  # %s\n",
                         addr, int(instr >> 24 & 0xFF), int(instr >> 16 & 0xFF),
                         int(instr >> 8 & 0xFF), int(instr >> 0 & 0xFF),
                         asmStr);
        scrolltext.append(instrStr);
        auto &highlight = scrolltext.getLine(line).highlight;
        highlight = { hideBP, normInstr };
        if (udb_breakpoint.find(addr) != udb_breakpoint.end()) {
            highlight[0] = showBP;
            scrolltext.getLine(line).text.wc_str()[1] = 'B';
        }
    }
    notify();
}

void
CodeView::notify()
{
    update(true);
}

void
CodeView::update(bool scrollToIP)
{
    static std::uint64_t prevInstrPtr, currInstrPtr;

    scrolltext.getLine(prevInstrPtr).highlight[1] = normInstr;
    scrolltext.getLine(currInstrPtr).highlight[1] = normInstr;
    prevInstrPtr = udb_getPrevIP() / 4;
    currInstrPtr = udb_getIP() / 4;

    const auto &l = scrolltext.getLines();
    if (currInstrPtr >= l.size()) {
        return;
    }

    scrolltext.getLine(prevInstrPtr).highlight[1] = prevInstr;
    scrolltext.getLine(currInstrPtr).highlight[1] = currInstr;

    int offsetIP = currInstrPtr - scrolltext.getScrollPos().getY();
    if (scrollToIP &&
        (offsetIP < 0 ||
         offsetIP > int(scrolltext.getTextVisibleSize().getHeight())))
    {
        scrolltext.scrollBy(0, offsetIP);
    } else {
        scrolltext.redraw();
    }
}

void
CodeView::initLayout()
{
    FDialog::setText("Program (Stage D: %IP points to next instruction)");
    setMinimumSize(FSize{ 51, 6 });
    auto x = 1 + int((getDesktopWidth() - 72));
    auto y = 1;
    auto window_size = FSize{ 72, getDesktopHeight() - y -1 };
    FDialog::setGeometry(FPoint{ x, y }, window_size);
    scrolltext.setGeometry(FPoint{ 1, 2 },
                           FSize{ getWidth(), getHeight() - 1 });
    FDialog::initLayout();
}

void
CodeView::adjustSize()
{
    finalcut::FDialog::adjustSize();

    if (!isZoomed()) {
        auto desktop_size = FSize{ getDesktopWidth(), getDesktopHeight() };
        FRect screen(FPoint{ 1, 1 }, desktop_size);
        bool center = false;

        if (getWidth() > getDesktopWidth()) {
            setWidth(getDesktopWidth() * 9 / 10);
            center = true;
        }

        if (getHeight() > getDesktopHeight()) {
            setHeight(getDesktopHeight() * 7 / 8);
            center = true;
        }

        // Centering the window when it is no longer
        // in the visible area of the terminal
        if (!screen.contains(getPos()) || center) {
            int x = 1 + int((getDesktopWidth() - getWidth()) / 2);
            int y = 1 + int((getDesktopHeight() - getHeight()) / 2);
            setPos(FPoint{ x, y });
        }
    }
    scrolltext.setGeometry(FPoint{ 1, 2 }, FSize(getWidth(), getHeight() - 1));
}

void
CodeView::onAccel(finalcut::FAccelEvent *ev)
{
    close();
    ev->accept();
}

CodeView::TextView::TextView(CodeView *codeView)
  : FTextView{ codeView }
  , codeView{ codeView }
{
}

void
CodeView::TextView::onMouseDown(FMouseEvent *ev)
{
    FTextView::onMouseDown(ev);
    if (ev->getButton() == MouseButton::Left && ev->getX() < int(getWidth())) {
        std::size_t line =
          codeView->scrolltext.getScrollPos().getY() + ev->getY() - 2;
        const auto &l = codeView->scrolltext.getLines();
        if (line >= l.size()) {
            return;
        }
        std::uint64_t addr = line * 4;
        if (udb_breakpoint.find(addr) != udb_breakpoint.end()) {
            udb_breakpoint.erase(addr);
            codeView->scrolltext.addHighlight(line, codeView->hideBP);
            codeView->scrolltext.getLine(line).text.wc_str()[1] = ' ';
        } else {
            udb_breakpoint[addr] = addr;
            codeView->scrolltext.addHighlight(line, codeView->showBP);
            codeView->scrolltext.getLine(line).text.wc_str()[1] = 'B';
        }
        codeView->update(false);
    }
}