/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.util.SortedSet;
import java.util.TreeSet;

public class Errors
{
    public static boolean hadError = false;
    private static boolean warningsAreErrors = false;
    private static TreeSet<Message> allErrors = new TreeSet<Message>();

    private static class Message implements Comparable {
        SourcePositionInfo pos;
        int level;
        String msg;

        Message(SourcePositionInfo p, int l, String m) {
            pos = p;
            level = l;
            msg = m;
        }

        public int compareTo(Object o) {
            Message that = (Message)o;
            int r = this.pos.compareTo(that.pos);
            if (r != 0) return r;
            return this.msg.compareTo(that.msg);
        }

        @Override
        public String toString() {
            String whereText = this.pos == null ? "unknown: " : this.pos.toString() + ':';
            return whereText + this.msg;
        }
    }

    public static void error(Error error, SourcePositionInfo where, String text) {
        if (error.level == HIDDEN) {
            return;
        }

        int level = (!warningsAreErrors && error.level == WARNING) ? WARNING : ERROR;
        String which = level == WARNING ? " warning " : " error ";
        String message = which + error.code + ": " + text;

        if (where == null) {
            where = new SourcePositionInfo("unknown", 0, 0);
        }

        allErrors.add(new Message(where, level, message));

        if (error.level == ERROR || (warningsAreErrors && error.level == WARNING)) {
            hadError = true;
        }
    }

    public static void printErrors() {
        for (Message m: allErrors) {
            if (m.level == WARNING) {
                System.err.println(m.toString());
            }
        }
        for (Message m: allErrors) {
            if (m.level == ERROR) {
                System.err.println(m.toString());
            }
        }
    }

    public static int HIDDEN = 0;
    public static int WARNING = 1;
    public static int ERROR = 2;

    public static void setWarningsAreErrors(boolean val) {
        warningsAreErrors = val;
    }

    public static class Error {
        public int code;
        public int level;

        public Error(int code, int level)
        {
            this.code = code;
            this.level = level;
        }
    }

    public static Error UNRESOLVED_LINK = new Error(1, WARNING);
    public static Error BAD_INCLUDE_TAG = new Error(2, WARNING);
    public static Error UNKNOWN_TAG = new Error(3, WARNING);
    public static Error UNKNOWN_PARAM_TAG_NAME = new Error(4, WARNING);
    public static Error UNDOCUMENTED_PARAMETER = new Error(5, HIDDEN);
    public static Error BAD_ATTR_TAG = new Error(6, ERROR);
    public static Error BAD_INHERITDOC = new Error(7, HIDDEN);
    public static Error HIDDEN_LINK = new Error(8, WARNING);
    public static Error HIDDEN_CONSTRUCTOR = new Error(9, WARNING);
    public static Error UNAVAILABLE_SYMBOL = new Error(10, ERROR);
    public static Error HIDDEN_SUPERCLASS = new Error(11, WARNING);
    public static Error DEPRECATED = new Error(12, HIDDEN);
    public static Error DEPRECATION_MISMATCH = new Error(13, WARNING);
    public static Error MISSING_COMMENT = new Error(14, WARNING);
    public static Error IO_ERROR = new Error(15, HIDDEN);
    public static Error NO_SINCE_DATA = new Error(16, HIDDEN);

    public static Error[] ERRORS = {
            UNRESOLVED_LINK,
            BAD_INCLUDE_TAG,
            UNKNOWN_TAG,
            UNKNOWN_PARAM_TAG_NAME,
            UNDOCUMENTED_PARAMETER,
            BAD_ATTR_TAG,
            BAD_INHERITDOC,
            HIDDEN_LINK,
            HIDDEN_CONSTRUCTOR,
            UNAVAILABLE_SYMBOL,
            HIDDEN_SUPERCLASS,
            DEPRECATED,
            DEPRECATION_MISMATCH,
            MISSING_COMMENT,
            IO_ERROR,
            NO_SINCE_DATA,
        };

    public static boolean setErrorLevel(int code, int level) {
        for (Error e: ERRORS) {
            if (e.code == code) {
                e.level = level;
                return true;
            }
        }
        return false;
    }
}
