import 'package:tasq/models/programmer_task.model.dart';
import 'package:tasq/models/programmer_task_activity_log.model.dart';
import 'package:tasq/models/programmer_task_work_log.model.dart';
import 'package:tasq/widgets/quill_field.dart';
import 'programmer_daily_time.dart';

/// A single row in a programmer's day sheet (assignee or helper work).
class DaySheetRow {
  final String taskId;
  final String title;
  final String category;
  final String kind; // 'assignee' or 'helper'
  final String? projectName;
  final String? helpedName;
  final int seconds;
  final List<String> notes;

  DaySheetRow({
    required this.taskId,
    required this.title,
    required this.category,
    required this.kind,
    this.projectName,
    this.helpedName,
    required this.seconds,
    required this.notes,
  });

  Map<String, dynamic> toJson() => {
        'task_id': taskId,
        'title': title,
        'category': category,
        'project_name': projectName,
        'kind': kind,
        'helped_name': helpedName,
        'seconds': seconds,
        'notes': notes,
      };

  factory DaySheetRow.fromJson(Map<String, dynamic> json) => DaySheetRow(
        taskId: json['task_id'] as String,
        title: json['title'] as String,
        category: json['category'] as String,
        kind: json['kind'] as String,
        projectName: json['project_name'] as String?,
        helpedName: json['helped_name'] as String?,
        seconds: json['seconds'] as int,
        notes: List<String>.from(json['notes'] as List? ?? []),
      );
}

/// Build day rows for a programmer on a specific day.
/// Returns rows for assignee tasks (by seconds desc) then helper tasks (by seconds desc).
List<DaySheetRow> buildDayRows({
  required String userId,
  required DateTime day,
  required List<ProgrammerTask> tasks,
  required Map<String, List<ProgrammerTaskActivityLog>> logsByTask,
  required List<ProgrammerTaskWorkLog> workLogs,
  required Map<String, String> projectNames,
  required Map<String, String> profileNames,
  required DateTime now,
}) {
  final taskMap = {for (final t in tasks) t.id: t};
  final workLogsByTaskAndAuthor = <String, List<ProgrammerTaskWorkLog>>{};

  // Group work logs by task and author for quick lookup
  for (final log in workLogs) {
    final key = '${log.taskId}:${log.authorId}';
    workLogsByTaskAndAuthor.putIfAbsent(key, () => []).add(log);
  }

  final rows = <DaySheetRow>[];

  // Process each task
  for (final task in tasks) {
    final assigneeId = task.assigneeId;

    // Compute daily seconds for this task
    final logs = logsByTask[task.id] ?? [];
    final dailyByAssignee = dailySecondsByAssignee(
      task: task,
      logs: logs,
      now: now,
    );
    final userDailySeconds = dailyByAssignee[userId] ?? {};
    final assigneeSeconds = userDailySeconds[day] ?? 0;

    // Check for assignee row: has seconds that day OR (is assignee AND authored notes-only log that day)
    final assigneeLogsKey = '${task.id}:$userId';
    final assigneeLogsThisDay = (userId == assigneeId)
        ? (workLogsByTaskAndAuthor[assigneeLogsKey]
                ?.where((l) => l.workDate == day && l.minutes == null)
                .toList() ??
            [])
        : [];

    if (assigneeSeconds > 0 || assigneeLogsThisDay.isNotEmpty) {
      final notes = assigneeLogsThisDay
          .map((l) => deltaJsonToPlainText(l.description))
          .where((n) => n.isNotEmpty)
          .toList();

      rows.add(DaySheetRow(
        taskId: task.id,
        title: task.title,
        category: task.category,
        kind: 'assignee',
        projectName: task.projectId != null ? projectNames[task.projectId] : null,
        helpedName: null,
        seconds: assigneeSeconds,
        notes: notes,
      ));
    }

    // Check for helper row: userId != assigneeId AND has minutes logs that day
    if (userId != assigneeId) {
      final helperLogsKey = '${task.id}:$userId';
      final helperLogs = workLogsByTaskAndAuthor[helperLogsKey]
              ?.where((l) => l.workDate == day && l.minutes != null && l.minutes! > 0)
              .toList() ??
          [];

      if (helperLogs.isNotEmpty) {
        final totalMinutes = helperLogs.fold<int>(0, (sum, l) => sum + (l.minutes ?? 0));
        final seconds = totalMinutes * 60;
        final notes = helperLogs
            .map((l) => deltaJsonToPlainText(l.description))
            .where((n) => n.isNotEmpty)
            .toList();

        rows.add(DaySheetRow(
          taskId: task.id,
          title: task.title,
          category: task.category,
          kind: 'helper',
          projectName: task.projectId != null ? projectNames[task.projectId] : null,
          helpedName: assigneeId != null ? profileNames[assigneeId] : null,
          seconds: seconds,
          notes: notes,
        ));
      }
    }
  }

  // Sort: assignee rows by seconds desc, then helper rows by seconds desc
  rows.sort((a, b) {
    if (a.kind != b.kind) {
      return a.kind == 'assignee' ? -1 : 1;
    }
    return b.seconds.compareTo(a.seconds);
  });

  return rows;
}

/// Calculate total seconds from day sheet rows.
int totalSeconds(List<DaySheetRow> rows) {
  return rows.fold(0, (sum, row) => sum + row.seconds);
}