package com.alibaba.mybatis.entity
import com.intellij.database.model.DasTable
import com.intellij.database.model.ObjectKind
import com.intellij.database.util.Case
import com.intellij.database.util.DasUtil
import java.text.SimpleDateFormat
/*
 *   Available   context bindings:
 *   SELECTION   Iterable<DasObject>
 *   PROJECT     project
 *   FILES       files helper
 */
packageName = ""
typeMapping = [
        (~/(?i)tinyint|smallint|mediumint|int/)  : "Integer",
        (~/(?i)bigint/)                          : "Long",
        (~/(?i)bool|bit/)                        : "Boolean",
        (~/(?i)float|double|decimal|real/)       : "Double",
        (~/(?i)datetime|timestamp|date|time/)    : "Date",
        (~/(?i)blob|binary|bfile|clob|raw|image/): "InputStream",
        (~/(?i)/)                                : "String"
]
FILES.chooseDirectoryAndSave("Choose directory", "Choose where to store generated files") { dir ->
    SELECTION.filter { it instanceof DasTable && it.getKind() == ObjectKind.TABLE }.each { generate(it, dir) }
}
def generate(table, dir) {
    def className = javaName(table.getName(), true)
    def fields = calcFields(table)
    packageName = getPackageName(dir)
    PrintWriter printWriter = new PrintWriter(new OutputStreamWriter(new FileOutputStream(new File(dir, className + ".java")), "UTF-8"))
    printWriter.withPrintWriter { out -> generate(out, className, fields, table) }
}
// 获取包所在文件夹路径
def getPackageName(dir) {
    return dir.toString().replaceAll("\\\\", ".").replaceAll("/", ".").replaceAll("^.*src(\\.main\\.java\\.)?", "") + ";"
}
def generate(out, className, fields, table) {
    out.println "package $packageName"
    out.println ""
    Set types = new HashSet()
    fields.each() {
        types.add(it.type)
    }
    if (types.contains("Date")) {
        out.println "import java.util.Date;"
    }
    // 生成开头文档
    out.println ""
    out.println "/**\n" +
            " * @author xiaozhi\n" + //1. 修改idea为自己名字
            " * @create " + new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()) + " \n" +
            " * @description  \n" +
            " */"
    out.println ""
    out.println '@SuppressWarnings("all")' // 去除右边黄色警告，清爽编码环境
    out.println "public class $className {"
    fields.each() {
        out.println ""
        // 输出数据库的字段注释
        if (isNotEmpty(it.commoent)) {
            out.println "\t/**"
            out.println "\t * ${it.commoent.toString()}"
            out.println "\t */"
        }
        // 输出成员变量
        out.println "\tprivate ${it.type} ${it.name};"
    }
    //生成无参构造函数
    out.println ""
    out.print "\tpublic "
    out.print className
    out.print "() {"
    out.println "}"
    //生成全参构造函数
    out.println ""
    out.print "\tpublic "
    out.print className
    out.print "("
    out.print getAllArgs(fields)
    out.print ") {"
    out.println ""
    fields.each() {
        out.println "\t\tthis.${it.name} = ${it.name};"
    }
    out.println "\t}"
    // 输出toString方法
    out.println ""
    out.println "\t@Override"
    out.println "\tpublic String toString() {"
    out.println "\t\treturn \"" + className + "{\" +"
    out.println getToString(fields)
    out.println "\t\t\t\t'}';"
    out.println "\t}"
    // 输出get/set方法
    fields.each() {
        out.println ""
        out.println "\tpublic ${it.type} get${it.name.capitalize()}() {"
        out.println "\t\treturn this.${it.name};"
        out.println "\t}"
        out.println ""
        out.println "\tpublic void set${it.name.capitalize()}(${it.type} ${it.name}) {"
        out.println "\t\tthis.${it.name} = ${it.name};"
        out.println "\t}"
    }
    out.println ""
    out.println "}"
}
def getToString(fields) {
    StringBuilder str = new StringBuilder()
    fields.each() {
        str = str.append("\t\t\t\t\", ${it.name}='\" + ${it.name} + '\\'' +\n")
    }
    def s = str.toString().replaceFirst(', ', "")
    return s.toString().replaceAll('\\n$', "")
}
def getAllArgs(fields) {
    StringBuilder AllArgs = new StringBuilder()
    fields.each() {
        AllArgs = AllArgs.append("${it.type} ${it.name}, ")
    }
    return AllArgs.toString().replaceAll(', $', "")
}
def calcFields(table) {
    DasUtil.getColumns(table).reduce([]) { fields, col ->
        def spec = Case.LOWER.apply(col.getDataType().getSpecification())
        def typeStr = typeMapping.find { p, t -> p.matcher(spec).find() }.value
        def comm = [
                colName : col.getName(),
                name    : javaName(col.getName(), false),
                type    : typeStr,
                commoent: col.getComment(),
                annos   : "\t@Column(name = \"" + col.getName() + "\")"]
        if ("id".equals(Case.LOWER.apply(col.getName())))
            comm.annos += ["@Id"]
        fields += [comm]
    }
}
def javaName(str, capitalize) {
    str = str.toString()
    str = str.replaceFirst('t_', "")
    def s = com.intellij.psi.codeStyle.NameUtil.splitNameIntoWords(str)
            .collect { Case.LOWER.apply(it).capitalize() }
            .join("")
            .replaceAll(/[^\p{javaJavaIdentifierPart}[_]]/, "_")
    capitalize || s.length() == 1 ? s : Case.LOWER.apply(s[0]) + s[1..-1]
}
def isNotEmpty(content) {
    return content != null && content.toString().trim().length() > 0
}
static String changeStyle(String str, boolean toCamel) {
    if (!str || str.size() <= 1)
        return str
    if (toCamel) {
        String r = str.toLowerCase().split('_').collect { cc -> Case.LOWER.apply(cc).capitalize() }.join('')
        return r[0].toLowerCase() + r[1..-1]
    } else {
        str = str[0].toLowerCase() + str[1..-1]
        return str.collect { cc -> ((char) cc).isUpperCase() ? '_' + cc.toLowerCase() : cc }.join('')
    }
}