//
// Created by robtor on 09.12.22.
//

#ifndef FLOATPUMP_MENU_H
#define FLOATPUMP_MENU_H

#include <vector>
#include "Menu_Entry.h"
#include "LCD_I2C_Driver.h"

namespace floatpump {
    namespace menu {

        class Menu {

        public:
            Menu(LCD_I2C_Driver &driver) : m_driver(driver) {

            }

            void addEntry(Menu_Entry entry) {
                m_entries.push_back(entry);
            }

            void displayMenu() {
                int page = m_first_index / 4;
                int pageindex = m_first_index % 4;

                for(int i = 0; i < 4; i++) {
                    m_driver.LCDSetCursor(0,i);

                    if(pageindex == i) {
                        m_driver.LCDSendChar(LCD_I2C_Driver::SpecialChars::RightArrow);
                    } else {
                        m_driver.LCDSendCString(" ");
                    }

                    m_driver.LCDSetCursor(1,i);
                    int entry_index = (page * 4) + i;
                    if( m_entries.size() > entry_index ) {
                        std::string dspstring = m_entries[entry_index].printLine();

                        if(dspstring.length() > 19) {
                            m_driver.LCDSendCString("-------------------");
                        } else {
                            dspstring.append((19 - dspstring.length()), ' ');
                            m_driver.LCDSendCString(const_cast<char *>(dspstring.c_str()));
                        }
                    } else {
                        m_driver.LCDSendCString("-------------------");
                    }
                }
            }

            void keypress() {
                if(m_first_index < m_entries.size()) {
                    m_entries[m_first_index].action_press();
                }

            }

            void increase() {
                if(m_entries[m_first_index].isEntered()) {
                    m_entries[m_first_index].action_increase();
                } else if(m_first_index < m_entries.size() - 1 && !m_entries[m_first_index].isEntered()) {
                    m_first_index++;
                }
            }

            void decrease() {
                if(m_entries[m_first_index].isEntered()) {
                    m_entries[m_first_index].action_decrease();
                } else if(m_first_index > 0) {
                    m_first_index--;
                }

            }
        private:
            LCD_I2C_Driver &m_driver;
            std::vector<Menu_Entry> m_entries;

            int m_first_index = 0;
        };

    } // floatpump
} // menu

#endif //FLOATPUMP_MENU_H