using YD_Event.Application.Auth;
using YD_Event.Application.Client.Dtos;

namespace YD_Event.Application.Client;

/// <summary>小程序检录员按秩序册列进行顺序检录。</summary>
[ApiDescriptionSettings("微信小程序接口")]
[Authorize]
public class CheckinController : IDynamicApiController
{
    private readonly ISqlSugarRepository<YD_Event.Core.Entities.AppUser> _userRepository;
    private readonly ISqlSugarRepository<CheckinTask> _taskRepository;
    private readonly ISqlSugarRepository<CheckinRecord> _recordRepository;
    private readonly CheckinScheduleService _scheduleService;
    private readonly AuthManager _authManager;

    public CheckinController(
        ISqlSugarRepository<YD_Event.Core.Entities.AppUser> userRepository,
        ISqlSugarRepository<CheckinTask> taskRepository,
        ISqlSugarRepository<CheckinRecord> recordRepository,
        CheckinScheduleService scheduleService,
        AuthManager authManager)
    {
        _userRepository = userRepository;
        _taskRepository = taskRepository;
        _recordRepository = recordRepository;
        _scheduleService = scheduleService;
        _authManager = authManager;
    }

    [HttpGet("current")]
    [DisplayName("获取当前赛事检录任务")]
    public async Task<CheckinContextDto?> GetCurrent(
        [FromQuery] long? eventProjectId = null,
        [FromQuery] long? groupId = null)
    {
        var userId = await EnsureCheckerAsync();
        var task = await GetCurrentTaskAsync(userId);
        return task == null ? null : await BuildContextAsync(task, eventProjectId, groupId);
    }

    [HttpPost("status")]
    [UnitOfWork]
    [DisplayName("更新秩序册列当前检次状态")]
    public async Task<CheckinContextDto> UpdateStatus([FromBody] UpdateCheckinStatusInput input)
    {
        var checkerUserId = await EnsureCheckerAsync();
        var task = await GetCurrentTaskAsync(checkerUserId);
        if (task == null) throw Oops.Bah("当前账号尚未由后台绑定赛事检录任务");

        var options = await _scheduleService.GetOptionsAsync(task.EventId);
        var unit = CheckinScheduleService.ResolveUnit(options, input.UnitKey);

        if (task.CheckinNo > 1)
        {
            var previousTask = await GetEventTaskAsync(task.EventId, task.CheckinNo - 1);
            var previousPassed = previousTask != null && await _recordRepository.IsAnyAsync(x =>
                x.TaskId == previousTask.Id && x.SessionKey == unit.UnitKey && x.Checked && !x.DeleteMark);
            if (!previousPassed)
                throw Oops.Bah($"该秩序册列尚未通过{ToCheckinName(task.CheckinNo - 1)}，不能进行{ToCheckinName(task.CheckinNo)}");
        }

        if (!input.Checked)
        {
            var laterTasks = await _taskRepository.AsQueryable()
                .Where(x => x.EventId == task.EventId && x.CheckinNo > task.CheckinNo &&
                            x.TaskStatus == 1 && x.Status == AvailabilityStatus.Enable && !x.DeleteMark)
                .ToListAsync();
            var laterTaskIds = laterTasks.Select(x => x.Id).ToList();
            if (laterTaskIds.Count > 0 && await _recordRepository.IsAnyAsync(x =>
                    laterTaskIds.Contains(x.TaskId) && x.SessionKey == unit.UnitKey && x.Checked && !x.DeleteMark))
                throw Oops.Bah("该秩序册列已通过后续检录，不能取消当前检录");
        }

        var record = await _recordRepository.GetFirstAsync(x =>
            x.TaskId == task.Id && x.SessionKey == unit.UnitKey && !x.DeleteMark);
        if (record == null)
        {
            record = new CheckinRecord
            {
                TaskId = task.Id,
                Round = task.CheckinNo,
                SessionKey = unit.UnitKey,
                SessionOrder = unit.Order,
                GroupId = unit.GroupId,
                RegistrationPersonId = unit.RegistrationPersonIds.FirstOrDefault(),
                CheckerUserId = checkerUserId,
                Checked = input.Checked,
                CheckedTime = input.Checked ? DateTime.Now : null,
                CreatedUserId = checkerUserId,
                CreatedTime = DateTime.Now
            };
            await _recordRepository.InsertAsync(record);
        }
        else
        {
            record.Round = task.CheckinNo;
            record.SessionOrder = unit.Order;
            record.GroupId = unit.GroupId;
            record.CheckerUserId = checkerUserId;
            record.Checked = input.Checked;
            record.CheckedTime = input.Checked ? DateTime.Now : null;
            record.UpdatedUserId = checkerUserId;
            record.UpdatedTime = DateTime.Now;
            await _recordRepository.UpdateAsync(record);
        }

        // 保持页面当前项目/组别筛选；UnitKey 已独立校验检录项归属。
        return await BuildContextAsync(task, input.EventProjectId, input.GroupId);
    }

    private async Task<CheckinContextDto> BuildContextAsync(CheckinTask task, long? eventProjectId, long? groupId)
    {
        var options = await _scheduleService.GetOptionsAsync(task.EventId);
        var selectedProject = options.Projects.FirstOrDefault(x => x.EventProjectId == eventProjectId)
                              ?? options.Projects.FirstOrDefault();
        if (selectedProject == null) throw Oops.Bah("当前赛事秩序册没有可检录项目");
        var selectedGroup = selectedProject.Groups.FirstOrDefault(x => x.Id == groupId)
                            ?? selectedProject.Groups.FirstOrDefault();
        if (selectedGroup == null) throw Oops.Bah("所选参赛项目没有可检录组别");

        var allUnits = options.Units.OrderBy(x => x.Order).ToList();
        var units = allUnits
            .Where(x => x.EventProjectId == selectedProject.EventProjectId && x.GroupId == selectedGroup.Id)
            .OrderBy(x => x.Order).ToList();
        var allUnitKeys = allUnits.Select(x => x.UnitKey).ToHashSet();
        var records = await _recordRepository.AsQueryable()
            .Where(x => x.TaskId == task.Id && x.SessionKey != null && !x.DeleteMark)
            .ToListAsync();
        var checkedKeys = records.Where(x => x.Checked && allUnitKeys.Contains(x.SessionKey!))
            .Select(x => x.SessionKey!).ToHashSet();

        HashSet<string> previousPassedKeys;
        if (task.CheckinNo == 1)
        {
            previousPassedKeys = allUnitKeys;
        }
        else
        {
            var previousTask = await GetEventTaskAsync(task.EventId, task.CheckinNo - 1);
            var previousRecords = previousTask == null
                ? new List<CheckinRecord>()
                : await _recordRepository.AsQueryable()
                    .Where(x => x.TaskId == previousTask.Id && x.SessionKey != null && x.Checked && !x.DeleteMark)
                    .ToListAsync();
            previousPassedKeys = previousRecords.Where(x => allUnitKeys.Contains(x.SessionKey!))
                .Select(x => x.SessionKey!).ToHashSet();
        }

        var allStatusUnits = allUnits.Select(unit =>
        {
            var previousPassed = previousPassedKeys.Contains(unit.UnitKey);
            return new CheckinOrderBookUnitStatusDto
            {
                UnitKey = unit.UnitKey,
                Order = unit.Order,
                SessionIndex = unit.SessionIndex,
                VenueIndex = unit.VenueIndex,
                VenueName = unit.VenueName,
                EventProjectId = unit.EventProjectId,
                ProjectId = unit.ProjectId,
                ProjectName = unit.ProjectName,
                GroupId = unit.GroupId,
                GroupName = unit.GroupName,
                RegistrationItemId = unit.RegistrationItemId,
                TeamName = unit.TeamName,
                UnitName = unit.UnitName,
                RegistrationPersonIds = unit.RegistrationPersonIds,
                Athletes = unit.Athletes,
                Checked = checkedKeys.Contains(unit.UnitKey),
                PreviousPassed = previousPassed,
                CanCheck = previousPassed,
                LockReason = previousPassed ? string.Empty : $"待通过{ToCheckinName(task.CheckinNo - 1)}"
            };
        }).ToList();
        var statusUnits = allStatusUnits
            .Where(x => x.EventProjectId == selectedProject.EventProjectId && x.GroupId == selectedGroup.Id)
            .ToList();

        // 为项目、组别选择区计算当前检次概况，全部完成时由小程序显示绿色状态。
        foreach (var project in options.Projects)
        {
            var projectUnits = allStatusUnits.Where(x => x.EventProjectId == project.EventProjectId).ToList();
            ApplyProgress(projectUnits, out var projectTotal, out var projectChecked,
                out var projectLocked, out var projectPercent, out var projectCompleted);
            project.TotalUnits = projectTotal;
            project.CheckedUnits = projectChecked;
            project.LockedUnits = projectLocked;
            project.ProgressPercent = projectPercent;
            project.IsCompleted = projectCompleted;

            foreach (var group in project.Groups)
            {
                var groupUnits = projectUnits.Where(x => x.GroupId == group.Id).ToList();
                ApplyProgress(groupUnits, out var groupTotal, out var groupChecked,
                    out var groupLocked, out var groupPercent, out var groupCompleted);
                group.TotalUnits = groupTotal;
                group.CheckedUnits = groupChecked;
                group.LockedUnits = groupLocked;
                group.ProgressPercent = groupPercent;
                group.IsCompleted = groupCompleted;
            }
        }

        var activeTasks = await GetActiveEventTasksAsync(task.EventId);
        return new CheckinContextDto
        {
            TaskId = task.Id,
            EventId = task.EventId,
            EventName = options.EventName,
            TotalCheckins = activeTasks.Count,
            CurrentCheckinNo = task.CheckinNo,
            CurrentCheckinName = ToCheckinName(task.CheckinNo),
            TotalRounds = activeTasks.Count,
            CurrentRound = task.CheckinNo,
            RoundName = ToCheckinName(task.CheckinNo),
            SelectedEventProjectId = selectedProject.EventProjectId,
            SelectedGroupId = selectedGroup.Id,
            CurrentGroupId = selectedGroup.Id,
            CurrentGroupName = selectedGroup.GroupName,
            Projects = options.Projects,
            Units = statusUnits,
            PendingUnits = statusUnits.Where(x => x.CanCheck && !x.Checked).ToList(),
            // 已检录跟随当前选中的项目和组别，便于现场聚焦操作。
            CheckedUnits = statusUnits.Where(x => x.Checked).ToList(),
            LockedUnits = statusUnits.Where(x => !x.CanCheck).ToList(),
            Rounds = activeTasks.Select(x => new CheckinRoundOptionDto
                { Round = x.CheckinNo, RoundName = ToCheckinName(x.CheckinNo) }).ToList()
        };
    }

    private async Task<CheckinTask?> GetCurrentTaskAsync(long userId) =>
        await _taskRepository.AsQueryable()
            .Where(x => x.CheckerUserId == userId && x.TaskStatus == 1 &&
                        x.Status == AvailabilityStatus.Enable && !x.DeleteMark)
            .OrderByDescending(x => x.UpdatedTime).OrderByDescending(x => x.CreatedTime).FirstAsync();

    private async Task<CheckinTask?> GetEventTaskAsync(long eventId, int checkinNo) =>
        await _taskRepository.GetFirstAsync(x => x.EventId == eventId && x.CheckinNo == checkinNo &&
            x.TaskStatus == 1 && x.Status == AvailabilityStatus.Enable && !x.DeleteMark);

    private async Task<List<CheckinTask>> GetActiveEventTasksAsync(long eventId) =>
        await _taskRepository.AsQueryable()
            .Where(x => x.EventId == eventId && x.TaskStatus == 1 &&
                        x.Status == AvailabilityStatus.Enable && !x.DeleteMark)
            .OrderBy(x => x.CheckinNo).ToListAsync();

    private async Task<long> EnsureCheckerAsync()
    {
        var userId = _authManager.UserId;
        var user = await _userRepository.GetFirstAsync(x => x.Id == userId && !x.DeleteMark);
        if (user == null) throw Oops.Bah("用户不存在");
        if (user.MiniProgramRole != MiniProgramRole.Checker) throw Oops.Bah("当前账号不是检录员身份");
        return userId;
    }

    private static string ToCheckinName(int checkinNo) => checkinNo switch
    {
        1 => "一检", 2 => "二检", 3 => "三检", _ => $"第{checkinNo}检"
    };

    private static void ApplyProgress(
        List<CheckinOrderBookUnitStatusDto> units,
        out int total,
        out int checkedCount,
        out int lockedCount,
        out int percent,
        out bool completed)
    {
        total = units.Count;
        checkedCount = units.Count(x => x.Checked);
        lockedCount = units.Count(x => !x.CanCheck);
        percent = total == 0 ? 0 : (int)Math.Round(checkedCount * 100d / total);
        completed = total > 0 && checkedCount == total;
    }
}