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.sql.Date


packageName = "需要生成到的地方;"

typeMapping = [
        (~/(?i)tinyint|smallint|mediumint/)      : "Integer",
        (~/(?i)int/)                             : "Integer",
        (~/(?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)number/)                          : "Integer",
        (~/(?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 = javaClassName(table.getName(), true)
    def fields = calcFields(table)
    def targetClassName = className.substring(1, className.size())
    new File(dir, targetClassName + ".java").withPrintWriter { out -> generate(out, targetClassName, fields, table) }
}


def generate(out, className, fields, table) {
    out.println "package $packageName"
    out.println ""
    out.println "import javax.persistence.*;"
    out.println "import java.io.Serializable;"

    Set types = new HashSet()

    fields.each() {
        types.add(it.type)
    }

    if (types.contains("Date")) {
        out.println "import java.util.Date;"
        out.println "import org.springframework.data.annotation.LastModifiedDate;"
        out.println "import org.springframework.data.annotation.CreatedDate;"
    }

    if (types.contains("InputStream")) {
        out.println "import java.io.InputStream;"
    }
    out.println ""
    out.println "@Entity"
    out.println "@Table ( name =\"" + table.getName() + "\" )"
    out.println "public class $className  implements Serializable {"
    out.println ""
    fields.each() {
        out.println ""
        // 输出注释 暂时不输出注释了
        // if (isNotEmpty(it.commoent)) {
        //    out.println "\t/**${it.commoent}*/"
        //  }

        if (it.annos != "") out.println "   ${it.annos}"
        // 输出成员变量
        out.println "\tprivate ${it.type} ${it.name};"
    }
    out.println ""

    // set get 方法
    fields.each() {
        out.println ""
        out.println "\tpublic ${it.type} get${it.name.capitalize()}() {"
        out.println "\t\treturn ${it.name};"
        out.println "\t}"
        out.println ""
        out.println "\tpublic void set${it.name.capitalize()}(${it.type} ${it.name}) {"
        out.println "\t\tthis.${it.name} = ${it.name};"
        out.println "\t}"
        out.println ""
    }

    out.println "}"
}

def 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    : changeStyle(javaName(col.getName(), false), true),
                type    : typeStr,
                commoent: col.getComment(),
                annos   : "\t@Column(name = \"" + col.getName() + "\" )"]
        if ("id".equals(Case.LOWER.apply(col.getName()))){
            comm.annos = "\t@Id"
        }
        if ("create_time".equals(Case.LOWER.apply(col.getName()))){
            comm.annos += "\n\t@CreatedDate"
        }
        if ("update_time".equals(Case.LOWER.apply(col.getName()))){
            comm.annos += "\n\t@LastModifiedDate"
        }
        fields += [comm]
    }
}

// 处理类名
def javaClassName(str, capitalize) {
    def s = str.split(/[^\p{Alnum}]/).collect { def s = Case.LOWER.apply(it).capitalize() }.join("")
    s = s[1..s.size() - 1]
    capitalize ? s : Case.LOWER.apply(s[0]) + s[1..-1]
}

def javaName(str, capitalize) {
    def s = str.split(/(?<=[^\p{IsLetter}])/).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('')
    }
}