using System;
using System.IO;
using System.Linq;
using System.Net.Http;
using System.Security.Cryptography;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Reader
{
    public partial class MainForm : Form
    {
        private static readonly HttpClient http = new HttpClient();
        private static readonly string ServerUrl;

        static MainForm()
        {
            var configPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "appsettings.json");
            var jsonContent = System.IO.File.ReadAllText(configPath);
            ServerUrl = jsonContent.Replace("\"", "").Split(':')[1].Replace("/", "").Trim();
        }

        public MainForm()
        {
            InitializeComponent();
        }

        private void btnBrowse_Click(object sender, EventArgs e)
        {
            using var fbd = new FolderBrowserDialog();
            if (fbd.ShowDialog() == DialogResult.OK)
            {
                txtFolder.Text = fbd.SelectedPath;
            }
        }

        private async void btnRead_Click(object sender, EventArgs e)
        {
            var folder = txtFolder.Text;
            if (string.IsNullOrWhiteSpace(folder) || !Directory.Exists(folder))
            {
                MessageBox.Show("请选择有效的文件夹。", "错误", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return;
            }
            dgv.Rows.Clear();
            var files = Directory.GetFiles(folder, "*", SearchOption.AllDirectories);
            var shaList = new System.Collections.Generic.List<string>();
            var fileMap = new System.Collections.Generic.Dictionary<string, string>();
            foreach (var f in files)
            {
                try
                {
                    var sha = await Task.Run(() => ComputeSha256(f));
                    shaList.Add(sha);
                    fileMap[sha] = f;
                }
                catch { }
            }
            if (shaList.Count == 0)
            {
                MessageBox.Show("没有找到文件。", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }
            var payload = new { shas = shaList };
            var content = new StringContent(JsonSerializer.Serialize(payload), Encoding.UTF8, "application/json");
            var resp = await http.PostAsync(ServerUrl + "/read", content);
            if (!resp.IsSuccessStatusCode)
            {
                MessageBox.Show("读取失败: " + await resp.Content.ReadAsStringAsync(), "失败", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
            var text = await resp.Content.ReadAsStringAsync();
            using var doc = JsonDocument.Parse(text);
            var root = doc.RootElement;
            var data = root.GetProperty("data");
            foreach (var sha in shaList)
            {
                var fileName = Path.GetFileName(fileMap[sha]);
                if (data.TryGetProperty(sha, out var item) && item.ValueKind != JsonValueKind.Null)
                {
                    var up = item.GetProperty("upload_code").GetString() ?? "";
                    var down = item.GetProperty("download_code").GetString() ?? "";
                    var created = item.GetProperty("created_at").GetString() ?? "";
                    dgv.Rows.Add(fileName, up, down, created);
                }
                else
                {
                    dgv.Rows.Add(fileName, "无", "无", "无");
                }
            }
        }

        private static string ComputeSha256(string filePath)
        {
            using var sha = SHA256.Create();
            using var stream = File.OpenRead(filePath);
            var hash = sha.ComputeHash(stream);
            var sb = new StringBuilder();
            foreach (var b in hash) sb.Append(b.ToString("x2"));
            return sb.ToString();
        }

        private void MainForm_Load(object sender, EventArgs e)
        {
            // 1. 去除自动尺寸模式的限制，改用手动指定
            dgv.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.None;

                // 2. 计算每一列的理想宽度
                // 假设您有 N 列，除了最后一列，其余列平分空间
                int columnCount = dgv.Columns.Count;
                int totalWidth = dgv.ClientSize.Width; // 获取控件当前宽度

                // 3. 遍历每一列
                for (int i = 0; i < columnCount; i++)
                {
                    // 这里做一个简单的平均分配逻辑
                    double width = totalWidth / columnCount;

                // 设置列宽，注意：不能小于最小宽度
                dgv.Columns[i].Width = (int)Math.Ceiling(width);
                }

                // 如果最后一列想稍微宽一点，或者确保宽度总和等于控件宽度，可以做微调
                int remaining = totalWidth - dgv.Columns.Cast<DataGridViewColumn>()
                    .Take(columnCount - 1)
                    .Sum(col => col.Width);

            dgv.Columns[columnCount - 1].Width = remaining;
        }
    }
}