using JavaCode.cs;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace JavaCode
{
    public partial class FrmMyBatisPlus : Form
    {
        #region 成员变量+构造函数
        string baseDir = AppDomain.CurrentDomain.BaseDirectory;

        private PostgreHelper _dbHelper;

        private List<TabInfo> _list;

        public FrmMyBatisPlus()
        {
            InitializeComponent();
        }

        private void FrmMyBatisPlus_Load(object sender, EventArgs e)
        {
            _dbHelper = new PostgreHelper(DbEnum.langfang);
        }
        #endregion


        #region 查询表结构：135502,69701  29257,20582
        private void btnReadTab_Click(object sender, EventArgs e)
        {
            try
            {
                string tabName = this.txtTabPre.Text.Trim();
                string tabFilter = string.IsNullOrEmpty(tabName) ? "" : string.Format("and c.relname like '{0}%'", tabName);

                string sql = string.Format("select c.relname \"tab\", cast(obj_description(c.oid) as varchar) \"desc\", a.attnum \"num\", a.attname \"col\", t.typname \"type\", d.description \"bak\" from pg_attribute a left join pg_description d on d.objoid = a.attrelid and d.objsubid = a.attnum left join pg_class c on a.attrelid = c.oid left join pg_type t on a.atttypid = t.oid where a.attnum >= 0 and reltype>0 and relnamespace in ({0}) {1} order by c.relname desc, a.attnum asc", this.txtNS.Text.Trim(), tabFilter);

                DataTable dt = _dbHelper.GetDataTable(sql, null);
                _list = ModelHandler.FillModel<TabInfo>(dt);
                if (_list == null || _list.Count == 0)
                {
                    MessageBox.Show("没有查询到数据！");
                    return;
                }

                List<string> tabList = new List<string>();
                foreach (TabInfo ti in _list)
                {
                    if (!tabList.Contains(ti.tab))
                    {
                        tabList.Add(ti.tab);
                    }
                }
                this.tabList.DataSource = tabList;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        private void btnAll_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < this.tabList.Items.Count; i++)
            {
                this.tabList.SetSelected(i, true);
            }
        }

        private void btnAnti_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < this.tabList.Items.Count; i++)
            {
                bool flag = this.tabList.GetSelected(i);
                this.tabList.SetSelected(i, !flag);
            }
        }

        private void btnNone_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < this.tabList.Items.Count; i++)
            {
                this.tabList.SetSelected(i, false);
            }
        }

        private void tabList_SelectedIndexChanged(object sender, EventArgs e)
        {
            string tab = this.tabList.SelectedItem as string;
            List<TabInfo> tabs = (from p in _list where p.tab == tab orderby p.num select p).ToList<TabInfo>();

            this.dgvTab.DataSource = new BindingList<TabInfo>(tabs);
            if (tabs != null && tabs.Count > 1)
            {
                this.dgvTab.Rows[1].Selected = true;
                this.dgvTab.CurrentCell = this.dgvTab.Rows[1].Cells[0];
            }
        }
        #endregion

        #region 按钮事件
        private void btnGeneMapper_Click(object sender, EventArgs e)
        {
            try
            {
                string path = Path.Combine(baseDir, "BsGenerate\\Mapper");

                List<string> names = GetTabList();
                foreach (string name in names)
                {
                    List<TabInfo> tabs = GetTabInfo(name);
                    GenerateMapper(path, name, tabs);
                }

                OpenFolder(path);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        private void btnGeneEntity_Click(object sender, EventArgs e)
        {
            try
            {
                string path = Path.Combine(baseDir, "BsGenerate\\Entity");

                List<string> names = GetTabList();
                foreach (string name in names)
                {
                    List<TabInfo> tabs = GetTabInfo(name);
                    GenerateEntity(path, name, tabs);
                }

                OpenFolder(path);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        private void btnGeneAll_Click(object sender, EventArgs e)
        {
            try
            {
                string mapperPath = Path.Combine(baseDir, "BsGenerate\\Mapper");
                string entityPath = Path.Combine(baseDir, "BsGenerate\\Entity");

                List<string> names = GetTabList();
                foreach (string name in names)
                {
                    List<TabInfo> tabs = GetTabInfo(name);
                    GenerateMapper(mapperPath, name, tabs);
                    GenerateEntity(entityPath, name, tabs);
                }

                string path = Path.Combine(baseDir, "BsGenerate");
                OpenFolder(path);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
        #endregion

        #region 生成 Mapper
        private void GenerateMapper(string path, string name, List<TabInfo> tabs)
        {
            if (!Directory.Exists(path)) Directory.CreateDirectory(path);

            string tabName = this.txtTabNS.Text.Trim() + name;
            string shortName = NameConvert(name, true);

            string mapperNS = this.txtMapperNS.Text.Trim();
            string mapperName = shortName + "Mapper";

            string entityNS = this.txtEntityNS.Text.Trim();
            string entityName = shortName + "Entity";

            string bak = string.IsNullOrWhiteSpace(tabs[0].desc) ? shortName : tabs[0].desc.Replace("表", "");

            string wkt = this.HasGeom(tabs) ?
                    "    /**\r\n" +
                    "     * 根据ID查询WKT\r\n" +
                    "     *\r\n" +
                    "     * @param gid\r\n" +
                    "     * @return\r\n" +
                    "     */\r\n" +
                    "    @Select(\"select st_astext(geom) geom from " + tabName + " where gid = #{gid}\")\r\n" +
                    "    String selectWktById(@Param(\"gid\") Integer gid);" : "";

            string xml = File.ReadAllText(Path.Combine(baseDir, "BsTemplate\\Mapper.java"));
            xml = xml
                .Replace("{mapperNS}", mapperNS)
                .Replace("{mapperName}", mapperName)
                .Replace("{entityNS}", entityNS)
                .Replace("{entityName}", entityName)
                .Replace("{wkt}", wkt)
                .Replace("{bak}", bak);

            string fileName = shortName + "Mapper.java";
            File.WriteAllText(Path.Combine(path, fileName), xml);
        }
        #endregion

        #region 生成 Entity
        private void GenerateEntity(string path, string name, List<TabInfo> tabs)
        {
            if (!Directory.Exists(path)) Directory.CreateDirectory(path);

            string tabName = this.txtTabNS.Text.Trim() + name;
            string shortName = NameConvert(name, true);

            string entityNS = this.txtEntityNS.Text.Trim();
            string entityName = shortName + "Entity";

            string bak = string.IsNullOrWhiteSpace(tabs[0].desc) ? shortName : tabs[0].desc.Replace("表", "");
            long uid = (long)Math.Floor((new Random()).NextDouble() * 1000000000000000000D);

            string xml = File.ReadAllText(Path.Combine(baseDir, "BsTemplate\\Entity.java"));
            xml = xml
                .Replace("{entityNS}", entityNS)
                .Replace("{entityName}", entityName)
                .Replace("{bak}", bak)
                .Replace("{tabName}", tabName)
                .Replace("{uid}", uid.ToString());

            StringBuilder sb = new StringBuilder();
            foreach (TabInfo ti in tabs)
            {
                string type = GetJavaType(ti);
                if (ti.col == "gid") sb.Append("\r\n    @TableId(type = IdType.AUTO)");
                if (ti.col == "geom") sb.Append("\r\n    @TableField(select = false)");
                if (ti.col == "class")
                {
                    sb.Append("\r\n    @TableField(value = \"class\")");
                    ti.col = "clazz";
                }

                string colName = NameConvert(ti.col, false);
                sb.Append("\r\n    private " + type + " " + colName + ";\r\n");
            }
            sb.Append("\r\n    public " + entityName + "() {\r\n    }\r\n");

            foreach (TabInfo ti in tabs)
            {
                string type = GetJavaType(ti);
                string col1 = NameConvert(ti.col, true);
                string col2 = NameConvert(ti.col, false);

                sb.Append("\r\n    public " + type + " get" + col1 + "() {\r\n        return " + col2 + ";\r\n    }\r\n");
                sb.Append("\r\n    public void set" + col1 + "(" + type + " " + col2 + ") {\r\n        this." + col2 + " = " + col2 + ";\r\n    }\r\n");
            }
            sb.Append("}\r\n");
            sb.Insert(0, xml);

            string fileName = shortName + "Entity.java";
            File.WriteAllText(Path.Combine(path, fileName), sb.ToString());
        }
        #endregion

        #region 公共方法
        private List<string> GetTabList()
        {
            List<string> list = new List<string>();
            for (int i = 0, c = this.tabList.SelectedItems.Count; i < c; i++)
            {
                string item = this.tabList.SelectedItems[i] as String;
                if (!string.IsNullOrEmpty(item))
                {
                    list.Add(item);
                }
            }

            return list;
        }

        private List<TabInfo> GetTabInfo(string name)
        {
            List<TabInfo> tabs = (from p in _list where p.tab == name orderby p.num select p).ToList<TabInfo>();

            return tabs;
        }

        private static string NameConvert(string name, bool firstUpper)
        {
            string[] strs = name.Split(new char[] { '_' });

            string str = "";
            for (int i = 0, c = strs.Length; i < c; i++)
            {
                if (i == 0 && !firstUpper)
                {
                    str += strs[i];
                    continue;
                }
                str += ToUpperFirst(strs[i]);
            }

            return str;
        }

        public static string ToUpperFirst(string str)
        {
            return Regex.Replace(str, @"^\w", t => t.Value.ToUpper());
        }

        private string GetJavaType(TabInfo ti)
        {
            switch (ti.type)
            {
                case "timestamp":
                    return "Timestamp";
                case "float4": // float
                    return "Float";
                case "float8": // double
                    return "Double";
                case "bool": // boolean
                    return "Boolean";
                case "numeric":
                    return "BigDecimal";
                case "int8": // long
                    return "Long";
                case "int2":
                case "int4": // int
                    return "Integer";
                default:
                    return "String";
            }
        }

        private bool HasGeom(List<TabInfo> tabs)
        {
            foreach (TabInfo ti in tabs)
            {
                if (ti.col == "geom") return true;
            }

            return false;
        }

        private static void OpenFolder(string folderPath)
        {
            if (string.IsNullOrEmpty(folderPath)) return;

            Process process = new Process();
            ProcessStartInfo psi = new ProcessStartInfo("Explorer.exe");
            psi.Arguments = folderPath;
            process.StartInfo = psi;

            try
            {
                process.Start();
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                process.Close();
            }
        }

        private String QueryPrimaryKey(string tab)
        {
            string sql = string.Format("select pg_attribute.attname as colname from pg_constraint inner join pg_class on pg_constraint.conrelid = pg_class.oid inner join pg_attribute on pg_attribute.attrelid = pg_class.oid and pg_attribute.attnum = pg_constraint.conkey[1] inner join pg_type on pg_type.oid = pg_attribute.atttypid where pg_class.relname = '{0}' and pg_constraint.contype='p'", tab);

            object obj = _dbHelper.GetScalar(sql, null);

            return obj == null ? null : obj.ToString();
        }
        #endregion
    }
}