using System;
using System.Collections.Generic;
using System.Data;
using System.Globalization;
using System.IO;
using System.Windows.Forms;
using System.Data.SQLite;
using Smart.CustomComponents;

namespace 成套报价软件
{
    /// <summary>
    /// 调系数 的交互逻辑(事件处理)。
    /// UI 布局定义见 调系数.ui.cs。
    /// 本窗体作为 MainForm 的对话框使用,故不含独立的 Main 入口点。
    ///
    /// 功能:批量修改元件表中的"采购系数"和"报出系数"。
    ///   - multiSelectComboBox1:多选元件类型(元件/壳体/母排),只显示/修改所选类型
    ///   - resizableComboBox1:调整范围(项目/图号)
    ///   - resizableComboBox2:图号列表(范围=图号时启用)
    ///   - resizableComboBox3:选择要修改的系数(采购系数/报价系数)
    ///   - resizableComboBox4:修改方法(等于/加/减)
    ///   - resizableTextBox1:输入数值
    ///   - button1:启动调整
    /// </summary>
    public partial class 调系数
    {
        // ====== 常量 ======

        /// <summary>图号表名(与主窗口一致)。</summary>
        private const string TuhaoTableName = "advancedDataGridView9Table";

        // ====== 字段 ======

        /// <summary>当前项目编号(主窗口传入)。</summary>
        private string _projectId;

        /// <summary>当前项目的报价库绝对路径。</summary>
        private string _quoteDbPath;

        /// <summary>内存中的全部元件行(已按当前类型筛选)。</summary>
        private readonly List<YuanjianRow> _allRows = new List<YuanjianRow>();

        // ====== 内部数据结构 ======

        /// <summary>元件表一行的内存表示(含定位信息,用于回写数据库)。</summary>
        private class YuanjianRow
        {
            public string Tuhao;          // 所属图号
            public string Xianghao;       // 所属箱号
            public string RealTableName;  // 该箱号元件表的真实表名(SQLite 表名)
            public long RowId;            // 在元件表中的 rowid
            public string Name;           // 元件名称
            public string Unit;           // 单位
            public string Count;          // 数量
            public string CaiGouXishu;    // 原采购系数
            public string BaoChuXishu;    // 原报出系数
            public string Leixing;        // 类型
        }

        // ====== 构造函数 ======

        /// <summary>无参构造函数(设计器/独立测试用,不绑定业务逻辑)。</summary>
        public 调系数()
        {
            InitializeComponent();
        }

        /// <summary>
        /// 带项目编号的构造函数(主窗口调用此版本)。
        /// 传入后窗体在 Load 时会从该项目的报价库加载数据。
        /// </summary>
        /// <param name="projectId">当前项目编号。</param>
        public 调系数(string projectId)
        {
            InitializeComponent();
            _projectId = projectId;
            _quoteDbPath = GetQuoteDbPath(projectId);

            this.Load += 调系数_Load;
            this.multiSelectComboBox1.SelectedItemsChanged += multiSelectComboBox1_SelectedIndexChanged;
            this.resizableComboBox1.SelectedIndexChanged += resizableComboBox1_SelectedIndexChanged;
            this.resizableComboBox2.SelectedIndexChanged += resizableComboBox2_SelectedIndexChanged;
            this.resizableComboBox3.SelectedIndexChanged += OnPreviewChanged;
            this.resizableComboBox4.SelectedIndexChanged += OnPreviewChanged;
            this.resizableTextBox1.TextChanged += OnPreviewChanged;
            this.button1.Click += button1_Click;
        }

        // ====== 窗体事件 ======

        private void 调系数_Load(object sender, EventArgs e)
        {
            // 默认勾选"元件"(用户最常用)
            if (this.multiSelectComboBox1.Items.Count > 0)
                // multiSelectComboBox 默认不选中

            // 默认范围=项目,resizableComboBox2 禁用
            this.resizableComboBox2.Enabled = false;

            // 表格只读(只用于预览,不能直接编辑)
            this.advancedDataGridView1.ReadOnly = true;
            this.advancedDataGridView1.AllowUserToAddRows = false;
            this.advancedDataGridView1.AllowUserToDeleteRows = false;
            this.advancedDataGridView1.SelectionMode = DataGridViewSelectionMode.CellSelect;

            // 加载数据
            ReloadData();
        }

        /// <summary>multiSelectComboBox1 选择变化:重新加载表格数据(按所选类型筛选)。</summary>
        private void multiSelectComboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            // SelectedItemsChanged 在多选场景下会触发多次,用 BeginInvoke 合并到 UI 空闲时执行
            this.BeginInvoke((Action)ReloadData);
        }

        /// <summary>resizableComboBox1 选择变化:切换"项目/图号"模式。</summary>
        private void resizableComboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            string scope = this.resizableComboBox1.Text;
            if (scope == "图号")
            {
                this.resizableComboBox2.Enabled = true;
                LoadTuhaoList();
            }
            else
            {
                this.resizableComboBox2.Enabled = false;
                this.resizableComboBox2.Items.Clear();
                ReloadData();
            }
        }

        /// <summary>resizableComboBox2 选择变化:加载指定图号的数据。</summary>
        private void resizableComboBox2_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (!this.resizableComboBox2.Enabled) return;
            ReloadData();
        }

        /// <summary>修改规则变化(系数类型/方法/数值):只刷新"新系数"列预览,不写库。</summary>
        private void OnPreviewChanged(object sender, EventArgs e)
        {
            RefreshPreviewColumns();
        }

        // ====== button1:启动调整 ======

        private void button1_Click(object sender, EventArgs e)
        {
            if (_allRows.Count == 0)
            {
                MessageBox.Show(this, "没有可调整的数据,请先选择类型和范围。",
                    "调系数", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }

            // 解析输入数值
            string numStr = this.resizableTextBox1.Text.Trim();
            double numVal;
            if (!double.TryParse(numStr, NumberStyles.Any, CultureInfo.InvariantCulture, out numVal) &&
                !double.TryParse(numStr, NumberStyles.Any, CultureInfo.CurrentCulture, out numVal))
            {
                MessageBox.Show(this, "请输入有效的数字。", "调系数",
                    MessageBoxButtons.OK, MessageBoxIcon.Warning);
                this.resizableTextBox1.Focus();
                return;
            }

            string xishu = this.resizableComboBox3.Text;        // 采购系数 / 报价系数
            string method = this.resizableComboBox4.Text;       // 等于 / 加 / 减
            string colName = (xishu == "采购系数") ? "采购系数" : "报出系数";

            // 二次确认
            string scope = this.resizableComboBox1.Text;
            string tuhaoInfo = (scope == "图号")
                ? "图号[" + this.resizableComboBox2.Text + "]"
                : "整个项目";
            string typeInfo = string.Join("/", GetSelectedTypes());
            if (typeInfo == "") typeInfo = "(未选类型)";
            string msg = string.Format(
                "将调整 {0} 内所有类型为 [{1}] 的元件行\n" +
                "调整对象:{2}\n调整方法:{3} {4}\n\n确认继续?",
                tuhaoInfo, typeInfo, colName, method, numStr);
            if (MessageBox.Show(this, msg, "调系数确认",
                MessageBoxButtons.OKCancel, MessageBoxIcon.Question) != DialogResult.OK)
                return;

            // 写回数据库
            int affected = 0;
            try
            {
                if (!File.Exists(_quoteDbPath))
                {
                    MessageBox.Show(this, "报价库不存在:" + _quoteDbPath, "调系数",
                        MessageBoxButtons.OK, MessageBoxIcon.Error);
                    return;
                }

                using (var conn = new SQLiteConnection(GetConnString(_quoteDbPath)))
                {
                    conn.Open();
                    using (var tx = conn.BeginTransaction())
                    {
                        // 按 RealTableName 分组,减少重复 SQL 解析
                        var groups = new Dictionary<string, List<YuanjianRow>>();
                        foreach (var r in _allRows)
                        {
                            if (string.IsNullOrEmpty(r.RealTableName)) continue;
                            if (!groups.ContainsKey(r.RealTableName))
                                groups[r.RealTableName] = new List<YuanjianRow>();
                            groups[r.RealTableName].Add(r);
                        }

                        foreach (var kv in groups)
                        {
                            string tbl = "\"" + kv.Key + "\"";
                            string sql = "UPDATE " + tbl +
                                " SET " + colName + " = @v WHERE rowid = @rid;";
                            using (var cmd = new SQLiteCommand(sql, conn, tx))
                            {
                                cmd.Parameters.Add("@v", DbType.String);
                                cmd.Parameters.Add("@rid", DbType.Int64);
                                foreach (var r in kv.Value)
                                {
                                    double oldVal = ParseXishu(r.CaiGouXishu, r.BaoChuXishu, colName);
                                    double newVal = ApplyMethod(oldVal, method, numVal);
                                    cmd.Parameters["@v"].Value = newVal.ToString("0.######", CultureInfo.InvariantCulture);
                                    cmd.Parameters["@rid"].Value = r.RowId;
                                    affected += cmd.ExecuteNonQuery();
                                }
                            }
                        }
                        tx.Commit();
                    }
                }

                MessageBox.Show(this, "调整完成,共更新 " + affected + " 条记录。", "调系数",
                    MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            catch (Exception ex)
            {
                MessageBox.Show(this, "调整失败:" + ex.Message, "调系数",
                    MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }

            // 重新加载数据(刷新原系数列)
            ReloadData();
        }

        // ====== 数据加载 ======

        /// <summary>根据当前选择重新加载表格数据。</summary>
        private void ReloadData()
        {
            _allRows.Clear();
            this.advancedDataGridView1.Rows.Clear();

            if (string.IsNullOrEmpty(_projectId) || !File.Exists(_quoteDbPath))
                return;

            var selTypes = GetSelectedTypes();
            if (selTypes.Count == 0) return;

            string scope = this.resizableComboBox1.Text;
            string targetTuhao = null;
            if (scope == "图号")
            {
                targetTuhao = this.resizableComboBox2.Text;
                if (string.IsNullOrEmpty(targetTuhao)) return;
            }

            try
            {
                using (var conn = new SQLiteConnection(GetConnString(_quoteDbPath)))
                {
                    conn.Open();

                    // 取所有图号名
                    var tuhaoList = new List<string>();
                    if (targetTuhao != null)
                    {
                        tuhaoList.Add(targetTuhao);
                    }
                    else
                    {
                        string sqlTh = "SELECT 图号 FROM " + TuhaoTableName + " ORDER BY rowid;";
                        using (var cmd = new SQLiteCommand(sqlTh, conn))
                        using (var rdr = cmd.ExecuteReader())
                        {
                            while (rdr.Read())
                            {
                                string t = rdr.IsDBNull(0) ? "" : rdr.GetValue(0).ToString();
                                if (!string.IsNullOrEmpty(t)) tuhaoList.Add(t);
                            }
                        }
                    }

                    foreach (var th in tuhaoList)
                    {
                        // 取该图号的箱号表真实表名
                        string xhTbl = LookupTableByIndex(conn, "箱号", th, "");
                        if (string.IsNullOrEmpty(xhTbl)) continue;

                        // 取该图号的所有箱号
                        var xhList = new List<string>();
                        try
                        {
                            string sqlXh = "SELECT 箱号 FROM \"" + xhTbl + "\" ORDER BY rowid;";
                            using (var cmd = new SQLiteCommand(sqlXh, conn))
                            using (var rdr = cmd.ExecuteReader())
                            {
                                while (rdr.Read())
                                {
                                    string x = rdr.IsDBNull(0) ? "" : rdr.GetValue(0).ToString();
                                    if (!string.IsNullOrEmpty(x)) xhList.Add(x);
                                }
                            }
                        }
                        catch { continue; }

                        foreach (var xh in xhList)
                        {
                            string yjTbl = LookupTableByIndex(conn, "元件", th, xh);
                            if (string.IsNullOrEmpty(yjTbl)) continue;

                            try
                            {
                                string sqlYj = "SELECT rowid, 元件名称, 单位, 数量, 采购系数, 报出系数, 类型 " +
                                               "FROM \"" + yjTbl + "\" ORDER BY rowid;";
                                using (var cmd = new SQLiteCommand(sqlYj, conn))
                                using (var rdr = cmd.ExecuteReader())
                                {
                                    while (rdr.Read())
                                    {
                                        string leixing = rdr.IsDBNull(6) ? "" : rdr.GetValue(6).ToString();
                                        // 只保留所选类型
                                        if (!selTypes.Contains(leixing)) continue;

                                        var r = new YuanjianRow();
                                        r.Tuhao = th;
                                        r.Xianghao = xh;
                                        r.RealTableName = yjTbl;
                                        r.RowId = rdr.GetInt64(0);
                                        r.Name = rdr.IsDBNull(1) ? "" : rdr.GetValue(1).ToString();
                                        r.Unit = rdr.IsDBNull(2) ? "" : rdr.GetValue(2).ToString();
                                        r.Count = rdr.IsDBNull(3) ? "" : rdr.GetValue(3).ToString();
                                        r.CaiGouXishu = rdr.IsDBNull(4) ? "" : rdr.GetValue(4).ToString();
                                        r.BaoChuXishu = rdr.IsDBNull(5) ? "" : rdr.GetValue(5).ToString();
                                        r.Leixing = leixing;
                                        _allRows.Add(r);
                                    }
                                }
                            }
                            catch { }
                        }
                    }
                }

                // 填充表格(按图号→箱号顺序,顺序与 _allRows 一致)
                this.advancedDataGridView1.RowCount = 0;
                foreach (var r in _allRows)
                {
                    int idx = this.advancedDataGridView1.Rows.Add();
                    var row = this.advancedDataGridView1.Rows[idx];
                    row.Cells[0].Value = r.Name;
                    row.Cells[1].Value = r.Unit;
                    row.Cells[2].Value = r.Count;
                    row.Cells[3].Value = r.CaiGouXishu;
                    row.Cells[4].Value = "";  // 新采购系数(预览)
                    row.Cells[5].Value = r.BaoChuXishu;
                    row.Cells[6].Value = "";  // 新报价系数(预览)
                    row.Tag = r;
                }

                // 计算预览列
                RefreshPreviewColumns();
            }
            catch (Exception ex)
            {
                MessageBox.Show(this, "加载数据失败:" + ex.Message, "调系数",
                    MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        /// <summary>刷新"新采购系数/新报价系数"两列的预览值(根据当前规则不写库)。</summary>
        private void RefreshPreviewColumns()
        {
            string xishu = this.resizableComboBox3.Text;
            string method = this.resizableComboBox4.Text;
            string numStr = this.resizableTextBox1.Text.Trim();
            double numVal;
            bool okNum = double.TryParse(numStr, NumberStyles.Any, CultureInfo.InvariantCulture, out numVal) ||
                         double.TryParse(numStr, NumberStyles.Any, CultureInfo.CurrentCulture, out numVal);

            bool modifyCaiGou = (xishu == "采购系数");
            bool modifyBaoChu = (xishu == "报价系数");

            for (int i = 0; i < this.advancedDataGridView1.Rows.Count; i++)
            {
                var row = this.advancedDataGridView1.Rows[i];
                var r = row.Tag as YuanjianRow;
                if (r == null) continue;

                // 新采购系数列
                if (modifyCaiGou && okNum)
                {
                    double oldVal = ParseXishu(r.CaiGouXishu, r.BaoChuXishu, "采购系数");
                    row.Cells[4].Value = ApplyMethod(oldVal, method, numVal)
                        .ToString("0.######", CultureInfo.InvariantCulture);
                }
                else
                {
                    row.Cells[4].Value = r.CaiGouXishu;
                }

                // 新报价系数列
                if (modifyBaoChu && okNum)
                {
                    double oldVal = ParseXishu(r.CaiGouXishu, r.BaoChuXishu, "报出系数");
                    row.Cells[6].Value = ApplyMethod(oldVal, method, numVal)
                        .ToString("0.######", CultureInfo.InvariantCulture);
                }
                else
                {
                    row.Cells[6].Value = r.BaoChuXishu;
                }
            }
        }

        /// <summary>把所有图号加载到 resizableComboBox2。</summary>
        private void LoadTuhaoList()
        {
            this.resizableComboBox2.Items.Clear();
            if (string.IsNullOrEmpty(_projectId) || !File.Exists(_quoteDbPath)) return;

            try
            {
                using (var conn = new SQLiteConnection(GetConnString(_quoteDbPath)))
                {
                    conn.Open();
                    string sql = "SELECT 图号 FROM " + TuhaoTableName + " ORDER BY rowid;";
                    using (var cmd = new SQLiteCommand(sql, conn))
                    using (var rdr = cmd.ExecuteReader())
                    {
                        while (rdr.Read())
                        {
                            string t = rdr.IsDBNull(0) ? "" : rdr.GetValue(0).ToString();
                            if (!string.IsNullOrEmpty(t)) this.resizableComboBox2.Items.Add(t);
                        }
                    }
                }
                if (this.resizableComboBox2.Items.Count > 0)
                    this.resizableComboBox2.SelectedIndex = 0;
                else
                    ReloadData();
            }
            catch { }
        }

        // ====== 辅助方法 ======

        /// <summary>获取 multiSelectComboBox1 选中的类型列表(元件/壳体/母排)。</summary>
        private List<string> GetSelectedTypes()
        {
            var result = new List<string>();
            var valsList = this.multiSelectComboBox1.SelectedValues;
            if (valsList != null) foreach (var v in valsList) if (!string.IsNullOrEmpty(v)) result.Add(v);
            return result;
        }

        /// <summary>根据系数列名从行中解析原系数值(空值当 1.0)。</summary>
        private double ParseXishu(string caiGou, string baoChu, string colName)
        {
            string s = (colName == "采购系数") ? caiGou : baoChu;
            double d;
            if (double.TryParse(s, NumberStyles.Any, CultureInfo.InvariantCulture, out d)) return d;
            if (double.TryParse(s, NumberStyles.Any, CultureInfo.CurrentCulture, out d)) return d;
            return 1.0;  // 默认值
        }

        /// <summary>按"等于/加/减"方法应用数值。</summary>
        private double ApplyMethod(double oldVal, string method, double numVal)
        {
            switch (method)
            {
                case "加": return oldVal + numVal;
                case "减": return oldVal - numVal;
                case "等于":
                default: return numVal;
            }
        }

        private string GetQuoteDbPath(string projectId)
        {
            string safeName = projectId;
            foreach (char c in Path.GetInvalidFileNameChars())
                safeName = safeName.Replace(c, '_');
            return Path.Combine(AppDomain.CurrentDomain.BaseDirectory, @"sjk\bjb\项目" + safeName + ".db");
        }

        private string GetConnString(string dbPath)
        {
            return "Data Source=" + dbPath + ";Version=3;";
        }

        /// <summary>查表索引(复用连接版本)。</summary>
        private string LookupTableByIndex(SQLiteConnection conn, string type,
            string tuhao, string xianghao)
        {
            if (conn == null || string.IsNullOrEmpty(tuhao)) return "";
            try
            {
                string sql = "SELECT 实际表名 FROM 表索引 WHERE 类型=@t AND 图号=@th AND 箱号=@xh LIMIT 1;";
                using (var cmd = new SQLiteCommand(sql, conn))
                {
                    cmd.Parameters.AddWithValue("@t", type);
                    cmd.Parameters.AddWithValue("@th", tuhao);
                    cmd.Parameters.AddWithValue("@xh", xianghao ?? "");
                    object o = cmd.ExecuteScalar();
                    return (o == null || o == DBNull.Value) ? "" : o.ToString();
                }
            }
            catch { return ""; }
        }
    }
}