package net.knarcraft.paidsigns.command;

import net.knarcraft.paidsigns.PaidSigns;
import net.knarcraft.paidsigns.container.PaidSign;
import net.knarcraft.paidsigns.container.PaidSignCondition;
import net.knarcraft.paidsigns.formatting.StringFormatter;
import net.knarcraft.paidsigns.formatting.TranslatableMessage;
import net.knarcraft.paidsigns.manager.PaidSignManager;
import net.knarcraft.paidsigns.property.OptionState;
import net.knarcraft.paidsigns.property.PaidSignConditionProperty;
import net.knarcraft.paidsigns.property.PaidSignProperty;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.jetbrains.annotations.NotNull;

import java.io.IOException;

/**
 * A representation of the command for editing a new paid sign
 */
public class EditCommand extends TokenizedCommand {

    @Override
    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label,
                             @NotNull String[] args) {
        if (argumentSize < 3) {
            return false;
        }

        PaidSign sign = PaidSigns.getInstance().getSignManager().getPaidSign(arguments.get(0));
        if (sign == null) {
            sender.sendMessage(StringFormatter.getTranslatedErrorMessage(TranslatableMessage.ERROR_PAID_SIGN_NOT_FOUND));
            return false;
        }

        try {
            try {
                //First, assume a condition is changed
                return parseGivenConditionLine(sign, sender);
            } catch (NumberFormatException exception) {
                //Fall back to assume a sign is changed
                return parseGivenProperty(sign, sender);
            }
        } catch (IOException e) {
            sender.sendMessage(StringFormatter.getTranslatedErrorMessage(TranslatableMessage.ERROR_EXCEPTION_OCCURRED));
            return false;
        }
    }

    /**
     * Parses the given condition line and the rest of the input
     *
     * @param sign   <p>The paid sign the user is trying to edit</p>
     * @param sender <p>The command sender to notify of any errors</p>
     * @return <p>True if the command was executed successfully</p>
     * @throws NumberFormatException <p>If the given argument is not a number</p>
     */
    private boolean parseGivenConditionLine(@NotNull PaidSign sign,
                                            @NotNull CommandSender sender) throws NumberFormatException {
        short signLine = (short) (Short.parseShort(arguments.get(1)) - 1);
        if (signLine < 0 || signLine > 3 || sign.getConditions().get(signLine) == null) {
            sender.sendMessage(StringFormatter.getTranslatedErrorMessage(TranslatableMessage.ERROR_NO_SUCH_CONDITION));
            return false;
        }
        if (argumentSize < 4) {
            return false;
        }

        PaidSignConditionProperty conditionProperty = PaidSignConditionProperty.getFromString(arguments.get(2));
        if (conditionProperty == null) {
            sender.sendMessage(StringFormatter.getTranslatedErrorMessage(
                    TranslatableMessage.ERROR_PROPERTY_NOT_RECOGNIZED));
            return false;
        }
        String value = arguments.get(3);
        return updateConditionProperty(sender, sign, signLine, conditionProperty, value);
    }

    /**
     * Parses the given paid sign property and the rest of the input
     *
     * @param sign   <p>The paid sign the user is trying to edit</p>
     * @param sender <p>The command sender to notify of any errors</p>
     * @return <p>True if the command was executed successfully</p>
     * @throws IOException <p>If unable to remove or save the sign</p>
     */
    private boolean parseGivenProperty(@NotNull PaidSign sign,
                                       @NotNull CommandSender sender) throws IOException {
        PaidSignProperty property = PaidSignProperty.getFromString(arguments.get(1));
        if (property == null) {
            sender.sendMessage(StringFormatter.getTranslatedErrorMessage(
                    TranslatableMessage.ERROR_PROPERTY_NOT_RECOGNIZED));
            return false;
        }
        String value = arguments.get(2);
        try {
            updateProperty(sender, sign, property, value);
            return true;
        } catch (NumberFormatException exception) {
            sender.sendMessage(StringFormatter.getTranslatedErrorMessage(TranslatableMessage.ERROR_INVALID_NUMBER));
            return false;
        }
    }

    /**
     * Updates a property for a paid sign
     *
     * @param sender   <p>The command sender to notify of any errors or success</p>
     * @param sign     <p>The sign to be updated</p>
     * @param property <p>The property to update</p>
     * @param newValue <p>The new value of the property</p>
     * @throws IOException <p>If unable to remove or save the sign</p>
     */
    private void updateProperty(CommandSender sender, PaidSign sign, PaidSignProperty property,
                                String newValue) throws IOException {
        String signName = property == PaidSignProperty.NAME ? newValue : sign.getName();
        OptionState ignoreCase = property == PaidSignProperty.IGNORE_CASE ? OptionState.fromString(newValue) :
                OptionState.getFromBoolean(sign.getIgnoreCase());
        OptionState ignoreColor = property == PaidSignProperty.IGNORE_COLOR ? OptionState.fromString(newValue) :
                OptionState.getFromBoolean(sign.getIgnoreColor());
        boolean matchAnyCondition = property == PaidSignProperty.MATCH_ANY_CONDITION ? Boolean.parseBoolean(newValue) :
                sign.matchAnyCondition();
        double cost = property == PaidSignProperty.COST ? Double.parseDouble(newValue) : sign.getCost();
        String permission = property == PaidSignProperty.PERMISSION ? newValue : sign.getPermission();

        PaidSignManager manager = PaidSigns.getInstance().getSignManager();
        PaidSign updatedSign = new PaidSign(signName, cost, permission, ignoreCase, ignoreColor, matchAnyCondition);
        manager.removePaidSign(sign.getName());
        manager.addPaidSign(updatedSign);

        sender.sendMessage(StringFormatter.getTranslatedInfoMessage(TranslatableMessage.SUCCESS_UPDATED_PAID_SIGN));
    }

    /**
     * Updates a property of a condition of a paid sign
     *
     * @param sender         <p>The command sender to notify of any errors or success</p>
     * @param sign           <p>The sign the condition belongs to</p>
     * @param conditionIndex <p>The line index that identifies the sign condition</p>
     * @param property       <p>The condition property to update</p>
     * @param newValue       <p>The new value of the property</p>
     * @return <p>True if the property was successfully changed</p>
     */
    private boolean updateConditionProperty(CommandSender sender, PaidSign sign, short conditionIndex,
                                            PaidSignConditionProperty property, String newValue) {
        PaidSignCondition condition = sign.getConditions().get(conditionIndex);
        String stringToMatch = property == PaidSignConditionProperty.STRING_TO_MATCH ? newValue :
                condition.getStringToMatch();
        boolean executeRegEx = property == PaidSignConditionProperty.EXECUTE_REG_EX ? Boolean.parseBoolean(newValue) :
                condition.executeRegex();
        boolean ignoreCase = property == PaidSignConditionProperty.IGNORE_CASE ? Boolean.parseBoolean(newValue) :
                condition.ignoreCase();
        boolean ignoreColor = property == PaidSignConditionProperty.IGNORE_COLOR ? Boolean.parseBoolean(newValue) :
                condition.ignoreColor();

        //Make sure to test the regular expression in case anything changed
        if (executeRegEx && isRegExInvalid(sender, stringToMatch)) {
            return false;
        }

        sign.addCondition(conditionIndex, stringToMatch, executeRegEx, OptionState.getFromBoolean(ignoreCase),
                OptionState.getFromBoolean(ignoreColor));

        try {
            PaidSigns.getInstance().getSignManager().saveSigns();
        } catch (IOException e) {
            sender.sendMessage(StringFormatter.getTranslatedErrorMessage(TranslatableMessage.ERROR_EXCEPTION_OCCURRED));
            return false;
        }

        sender.sendMessage(StringFormatter.getTranslatedInfoMessage(
                TranslatableMessage.SUCCESS_UPDATED_PAID_SIGN_CONDITION));
        return true;
    }

}