using System.Security.Claims;
using Microsoft.AspNetCore.Mvc;
using Rmsys.Api.Compat;
using Microsoft.EntityFrameworkCore;
using Rmsys.Infrastructure;

namespace Rmsys.Api.Endpoints;

/// <summary>
/// 干部任免审批表 3.0（.lrmx）导入接口 —— 后台「任免表导入 / 批量上传个人材料」用。
///   POST /api/admin/lrmx/import   multipart: file(.lrmx) + meetingId + dryRun(0/1)
/// dryRun=1 只解析并回执字段，不写库（向导里的「格式解析」预览步骤）。
/// </summary>
public static class LrmxEndpoints
{
    private const long MaxBytes = 20L * 1024 * 1024;   // .lrmx 含照片，给 20MB

    public static void MapLrmxEndpoints(this WebApplication app)
    {
        app.MapPost("/api/admin/lrmx/import",
            async (HttpRequest req, ClaimsPrincipal p, RmsysDbContext db, IWebHostEnvironment env) =>
        {
            // net6 不支持 IFormFile 参数绑定，统一手动读表单
            var form = await FormCompat.ReadFormAsync(req);
            if (form == null) return Results.Ok(new { ok = false, message = "请求格式不正确（需 multipart/form-data）" });
            var file = form.Files.GetFile("file");
            var meetingId = FormCompat.Int(form, "meetingId");
            var dryRun = FormCompat.Int(form, "dryRun");

            if (file == null || file.Length == 0)
                return Results.Ok(new { ok = false, message = "未收到文件" });
            if (file.Length > MaxBytes)
                return Results.Ok(new { ok = false, message = $"文件超过 20 MB（实际 {file.Length / 1024 / 1024} MB）" });
            if (!string.Equals(Path.GetExtension(file.FileName), ".lrmx", StringComparison.OrdinalIgnoreCase))
                return Results.Ok(new { ok = false, message = "只接受 .lrmx（干部任免审批表 3.0 导出文件）" });

            // 会议可写校验（已登记 / 已归档不允许再导入）
            if (meetingId > 0)
            {
                var m = await db.Meetings.FirstOrDefaultAsync(x => x.Id == meetingId && x.IsDeleted == 0);
                if (m == null) return Results.Ok(new { ok = false, message = "会议不存在" });
                var deny = Auth.MeetingGuard.CheckWritable(m);
                if (deny != null) return Results.Json(new { ok = false, message = deny }, statusCode: 409);
            }

            var tmp = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString("N") + ".lrmx");
            try
            {
                await using (var fs = File.Create(tmp)) await file.CopyToAsync(fs);

                LrmxPerson person;
                try { person = LrmxImporter.ParseFile(tmp); }
                catch (Exception ex) { return Results.Ok(new { ok = false, message = "解析失败：" + ex.Message }); }

                if (dryRun == 1)
                {
                    return Results.Ok(new
                    {
                        ok = true,
                        dryRun = true,
                        name = person.Name,
                        sex = person.Sex,
                        birth = person.Birth,
                        nation = person.Nation,
                        nativePlace = person.NativePlace,
                        partyDate = person.PartyDate,
                        workDate = person.WorkDate,
                        currentPost = person.CurrentPost,
                        proposedPost = person.ProposedPost,
                        dismissPost = person.DismissPost,
                        resumes = person.Resumes.Count,
                        family = person.Family.Count,
                        photo = person.Photo != null,
                        version = person.Version,
                        // 预览用：前若干段简历与家庭成员，便于干部科核对解析结果
                        resumeSample = person.Resumes.Take(3).Select(x => x.Period + "  " + x.Content).ToList(),
                        familySample = person.Family.Take(5)
                            .Select(x => $"{x.Relation} {x.Name}（{x.Birth}）{x.Political} {x.WorkUnit}").ToList()
                    });
                }

                var user = p.FindFirst(ClaimTypes.Name)?.Value ?? "—";
                var root = Path.Combine(env.ContentRootPath, "App_Data");
                var r = await LrmxImportService.ImportAsync(db, person, meetingId, root, tmp,
                    Path.GetFileName(file.FileName), user);

                return Results.Ok(new
                {
                    ok = true,
                    created = r.Created,
                    cadreId = r.CadreId,
                    name = r.Name,
                    resumes = r.Resumes,
                    family = r.Family,
                    photo = r.Photo,
                    onRoster = r.OnRoster,
                    version = r.Version,
                    message = (r.Created ? "新增干部 " : "更新干部 ") + r.Name
                              + $"｜简历 {r.Resumes} 段｜家庭 {r.Family} 人" + (r.Photo ? "｜照片已存" : "")
                });
            }
            finally
            {
                try { if (File.Exists(tmp)) File.Delete(tmp); } catch { /* 临时文件删不掉不影响结果 */ }
            }
        }).RequireAuthorization()
        // .NET 8 的 [FromForm] 绑定会给端点挂上防伪校验元数据；本项目用 Bearer 令牌而非 Cookie，
        // 且未注册防伪中间件，这里显式关闭，否则请求直接 500。
        .NoAntiforgery();
    }
}