using System;
using System.Collections.Generic;
using System.Windows.Forms;

namespace MyAppPdf
{
    /// <summary>
    /// 新建项目 窗口(简化版,不依赖企业信息)。
    /// UI 布局见 新建项目.ui.cs,本文件只含交互逻辑。
    /// </summary>
    public partial class 新建项目 : Form
    {
        // 价格格式化选项(与主项目 价格格式化.cs 保持一致)
        private static readonly string[] 小数位选项 =
        {
            "保留整数", "保留1位小数", "保留2位小数", "保留3位小数",
            "保留4位小数", "保留5位小数", "保留6位小数"
        };
        private static readonly string[] 取整方式选项 =
        {
            "不取整", "四舍五入", "四舍五入到角", "四舍五入到元",
            "四舍五入到十元", "向上取整到元", "最近5元", "最近10元"
        };

        private readonly string _dbPath;
        private readonly string _tableName;

        public 新建项目() : this(null, null) { }

        /// <summary>带数据库路径的构造函数(用于自动生成项目编号)。</summary>
        public 新建项目(string dbPath, string tableName)
        {
            InitializeComponent();
            _dbPath = dbPath;
            _tableName = tableName;
            InitPriceFormatCombos();
            this.Load += 新建项目_Load;
        }

        private void InitPriceFormatCombos()
        {
            cmb单台价格.Items.Clear();
            cmb单台价格.Items.AddRange(小数位选项);
            cmb项目总价.Items.Clear();
            cmb项目总价.Items.AddRange(小数位选项);
            comboBox1.Items.Clear();
            comboBox1.Items.AddRange(取整方式选项);
            comboBox2.Items.Clear();
            comboBox2.Items.AddRange(取整方式选项);
        }

        private void 新建项目_Load(object sender, EventArgs e)
        {
            FillAutoFields();
        }

        /// <summary>自动填充项目日期(当天)和项目编号(yyyyMMdd+3位序号)。</summary>
        private void FillAutoFields()
        {
            DateTime today = DateTime.Today;
            txt项目日期.Text = today.ToString("yyyy-MM-dd");

            string datePart = today.ToString("yyyyMMdd");
            int seq = GetNextSeqForDate(datePart);
            txt项目编号.Text = datePart + seq.ToString("000");
            txt项目编号.ReadOnly = true;
            txt项目编号.TabStop = false;
            txt项目编号.BackColor = System.Drawing.SystemColors.Control;
        }

        /// <summary>查数据库当天最大序号+1,失败返回1。</summary>
        private int GetNextSeqForDate(string datePart)
        {
            if (string.IsNullOrEmpty(datePart) ||
                string.IsNullOrEmpty(_dbPath) ||
                string.IsNullOrEmpty(_tableName) ||
                !System.IO.File.Exists(_dbPath))
            {
                return 1;
            }
            try
            {
                string connStr = "Data Source=" + _dbPath + ";Version=3;";
                using (var conn = new System.Data.SQLite.SQLiteConnection(connStr))
                {
                    conn.Open();
                    string sql =
                        "SELECT MAX(CAST(SUBSTR(项目编号, 9) AS INTEGER)) " +
                        "FROM " + _tableName + " " +
                        "WHERE SUBSTR(项目编号, 1, 8) = '" + datePart + "';";
                    using (var cmd = new System.Data.SQLite.SQLiteCommand(sql, conn))
                    {
                        object result = cmd.ExecuteScalar();
                        if (result == null || result == DBNull.Value) return 1;
                        int maxSeq;
                        if (int.TryParse(result.ToString(), out maxSeq)) return maxSeq + 1;
                        return 1;
                    }
                }
            }
            catch { return 1; }
        }

        /// <summary>收集对话框字段,以列名为键返回(供 Form3 写入数据库)。</summary>
        public Dictionary<string, string> GetInputValues()
        {
            var values = new Dictionary<string, string>();
            AddIfNotEmpty(values, "项目编号", txt项目编号.Text);
            AddIfNotEmpty(values, "项目日期", txt项目日期.Text);
            AddIfNotEmpty(values, "项目名称", txt项目名称.Text);
            AddIfNotEmpty(values, "客户名称", txt客户名称.Text);
            AddIfNotEmpty(values, "客户地址", txt客户地址.Text);
            AddIfNotEmpty(values, "联系人", txt联系人.Text);
            AddIfNotEmpty(values, "联系电话", txt联系电话.Text);
            AddIfNotEmpty(values, "备注", txt备注.Text);
            AddIfNotEmpty(values, "成套厂名称", txt成套厂名称.Text);
            AddIfNotEmpty(values, "成套厂地址", txt成套厂地址.Text);
            AddIfNotEmpty(values, "成套厂联系人", txt成套厂联系人.Text);
            AddIfNotEmpty(values, "成套厂联系电话", txt成套厂联系电话.Text);
            values["单台小数位"] = (cmb单台价格.SelectedItem ?? cmb单台价格.Text ?? "").ToString();
            values["项目小数位"] = (cmb项目总价.SelectedItem ?? cmb项目总价.Text ?? "").ToString();
            values["单台取整方式"] = (comboBox1.SelectedItem ?? comboBox1.Text ?? "").ToString();
            values["项目取整方式"] = (comboBox2.SelectedItem ?? comboBox2.Text ?? "").ToString();
            return values;
        }

        private static void AddIfNotEmpty(Dictionary<string, string> dict, string key, string value)
        {
            if (!string.IsNullOrWhiteSpace(value)) dict[key] = value.Trim();
        }
    }
}