package com.doumee.lib_coremodel.util;

import androidx.annotation.Nullable;

/**
 * @see <a href="https://github.com/google/guava/blob/b86fe4fc7ec511d78507c3ba32c789d1f250f827/guava/src/com/google/common/base/Preconditions.java">guava</a>
 * @author <a href="mailto:jenly1314@gmail.com">Jenly</a>
 */
public final class Preconditions {
    private Preconditions() {}

    /**
     * Ensures the truth of an expression involving one or more parameters to the calling method.
     *
     * @param expression a boolean expression
     * @throws IllegalArgumentException if {@code expression} is false
     */
    public static void checkArgument(boolean expression) {
        if (!expression) {
            throw new IllegalArgumentException();
        }
    }

    /**
     * Ensures the truth of an expression involving one or more parameters to the calling method.
     *
     * @param expression a boolean expression
     * @param errorMessage the exception message to use if the check fails; will be converted to a
     *     string using {@link String#valueOf(Object)}
     * @throws IllegalArgumentException if {@code expression} is false
     */
    public static void checkArgument(boolean expression, @Nullable Object errorMessage) {
        if (!expression) {
            throw new IllegalArgumentException(String.valueOf(errorMessage));
        }
    }

    /**
     * Ensures the truth of an expression involving one or more parameters to the calling method.
     *
     * @param expression a boolean expression
     * @param errorMessageTemplate a template for the exception message should the check fail. The
     *     message is formed by replacing each {@code %s} placeholder in the template with an
     *     argument. These are matched by position - the first {@code %s} gets {@code
     *     errorMessageArgs[0]}, etc. Unmatched arguments will be appended to the formatted message in
     *     square braces. Unmatched placeholders will be left as-is.
     * @param errorMessageArgs the arguments to be substituted into the message template. Arguments
     *     are converted to strings using {@link String#valueOf(Object)}.
     * @throws IllegalArgumentException if {@code expression} is false
     */
    public static void checkArgument(
            boolean expression,
            @Nullable String errorMessageTemplate,
            @Nullable Object... errorMessageArgs) {
        if (!expression) {
            throw new IllegalArgumentException(lenientFormat(errorMessageTemplate, errorMessageArgs));
        }
    }

    /**
     * Ensures the truth of an expression involving the state of the calling instance, but not
     * involving any parameters to the calling method.
     *
     * @param expression a boolean expression
     * @throws IllegalStateException if {@code expression} is false
     */
    public static void checkState(boolean expression) {
        if (!expression) {
            throw new IllegalStateException();
        }
    }

    /**
     * Ensures the truth of an expression involving the state of the calling instance, but not
     * involving any parameters to the calling method.
     *
     * @param expression a boolean expression
     * @param errorMessage the exception message to use if the check fails; will be converted to a
     *     string using {@link String#valueOf(Object)}
     * @throws IllegalStateException if {@code expression} is false
     */
    public static void checkState(boolean expression, @Nullable Object errorMessage) {
        if (!expression) {
            throw new IllegalStateException(String.valueOf(errorMessage));
        }
    }

    /**
     * Ensures the truth of an expression involving the state of the calling instance, but not
     * involving any parameters to the calling method.
     *
     * @param expression a boolean expression
     * @param errorMessageTemplate a template for the exception message should the check fail. The
     *     message is formed by replacing each {@code %s} placeholder in the template with an
     *     argument. These are matched by position - the first {@code %s} gets {@code
     *     errorMessageArgs[0]}, etc. Unmatched arguments will be appended to the formatted message in
     *     square braces. Unmatched placeholders will be left as-is.
     * @param errorMessageArgs the arguments to be substituted into the message template. Arguments
     *     are converted to strings using {@link String#valueOf(Object)}.
     * @throws IllegalStateException if {@code expression} is false
     */
    public static void checkState(
            boolean expression,
            @Nullable String errorMessageTemplate,
            @Nullable Object... errorMessageArgs) {
        if (!expression) {
            throw new IllegalStateException(lenientFormat(errorMessageTemplate, errorMessageArgs));
        }
    }

    /**
     * Ensures that an object reference passed as a parameter to the calling method is not null.
     *
     * @param reference an object reference
     * @return the non-null reference that was validated
     * @throws NullPointerException if {@code reference} is null
     */
    
    public static <T> T checkNotNull(T reference) {
        if (reference == null) {
            throw new NullPointerException();
        }
        return reference;
    }

    /**
     * Ensures that an object reference passed as a parameter to the calling method is not null.
     *
     * @param reference an object reference
     * @param errorMessage the exception message to use if the check fails; will be converted to a
     *     string using {@link String#valueOf(Object)}
     * @return the non-null reference that was validated
     * @throws NullPointerException if {@code reference} is null
     */

    public static <T> T checkNotNull(T reference, @Nullable Object errorMessage) {
        if (reference == null) {
            throw new NullPointerException(String.valueOf(errorMessage));
        }
        return reference;
    }

    /**
     * Ensures that an object reference passed as a parameter to the calling method is not null.
     *
     * @param reference an object reference
     * @param errorMessageTemplate a template for the exception message should the check fail. The
     *     message is formed by replacing each {@code %s} placeholder in the template with an
     *     argument. These are matched by position - the first {@code %s} gets {@code
     *     errorMessageArgs[0]}, etc. Unmatched arguments will be appended to the formatted message in
     *     square braces. Unmatched placeholders will be left as-is.
     * @param errorMessageArgs the arguments to be substituted into the message template. Arguments
     *     are converted to strings using {@link String#valueOf(Object)}.
     * @return the non-null reference that was validated
     * @throws NullPointerException if {@code reference} is null
     */
    
    public static <T> T checkNotNull(
            T reference, @Nullable String errorMessageTemplate, @Nullable Object... errorMessageArgs) {
        if (reference == null) {
            throw new NullPointerException(lenientFormat(errorMessageTemplate, errorMessageArgs));
        }
        return reference;
    }

    public static String lenientFormat(
            @Nullable String template, @Nullable Object... args) {
        template = String.valueOf(template); // null -> "null"

        if (args == null) {
            args = new Object[] {"(Object[])null"};
        }

        // start substituting the arguments into the '%s' placeholders
        StringBuilder builder = new StringBuilder(template.length() + 16 * args.length);
        int templateStart = 0;
        int i = 0;
        while (i < args.length) {
            int placeholderStart = template.indexOf("%s", templateStart);
            if (placeholderStart == -1) {
                break;
            }
            builder.append(template, templateStart, placeholderStart);
            builder.append(args[i++]);
            templateStart = placeholderStart + 2;
        }
        builder.append(template, templateStart, template.length());

        // if we run out of placeholders, append the extra args in square braces
        if (i < args.length) {
            builder.append(" [");
            builder.append(args[i++]);
            while (i < args.length) {
                builder.append(", ");
                builder.append(args[i++]);
            }
            builder.append(']');
        }

        return builder.toString();
    }
    

}