import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:tasq/models/programmer_day_sheet.model.dart';
import 'package:tasq/models/programmer_task.model.dart';
import 'package:tasq/utils/app_time.dart';
import 'package:tasq/utils/programmer_stats.dart';

void main() {
  setUpAll(AppTime.initialize);

  ProgrammerDaySheet makeSheet({
    String id = 'id',
    String programmerId = 'user1',
    String status = 'pending',
    required DateTime workDate,
    int resubmissions = 0,
    DaySheetSnapshot? approvedSnapshot,
  }) {
    return ProgrammerDaySheet(
      id: id,
      programmerId: programmerId,
      status: status,
      workDate: workDate,
      resubmissions: resubmissions,
      approvedSnapshot: approvedSnapshot,
      createdAt: DateTime.utc(2026, 1, 1),
      updatedAt: DateTime.utc(2026, 1, 1),
    );
  }

  ProgrammerStats statsWith({
    int completedTotal = 0,
    int bugFixCompleted = 0,
    Duration approvedTotal = Duration.zero,
    Duration helpGivenTotal = Duration.zero,
    Duration helpGivenThisMonth = Duration.zero,
    Duration todayFocus = Duration.zero,
    int completedThisWeek = 0,
    int completedLastWeek = 0,
    int currentStreak = 0,
    int bestStreak = 0,
    double? firstPassRate,
    bool hasCleanWeek = false,
  }) {
    return ProgrammerStats(
      todayFocus: todayFocus,
      helpGivenThisMonth: helpGivenThisMonth,
      approvedTotal: approvedTotal,
      helpGivenTotal: helpGivenTotal,
      completedThisWeek: completedThisWeek,
      completedLastWeek: completedLastWeek,
      currentStreak: currentStreak,
      bestStreak: bestStreak,
      completedTotal: completedTotal,
      bugFixCompleted: bugFixCompleted,
      firstPassRate: firstPassRate,
      hasCleanWeek: hasCleanWeek,
    );
  }

  test('fromMap parses work_date and snapshot', () {
    final ts = DateTime.utc(2026, 9, 28).toIso8601String();
    final m = <String, dynamic>{
      'id': 'ds1',
      'programmer_id': 'user1',
      'status': 'approved',
      'work_date': '2026-09-23',
      'submitted_at': null,
      'reviewed_at': null,
      'auto_submitted': false,
      'reviewed_by': null,
      'resubmissions': 0,
      'approved_snapshot': <String, dynamic>{
        'v': 1,
        'total_seconds': 3600,
        'rows': <dynamic>[],
      },
      'created_at': ts,
      'updated_at': ts,
    };
    final sheet = ProgrammerDaySheet.fromMap(m);
    expect(sheet.workDate, DateTime.utc(2026, 9, 23));
    expect(sheet.approvedSnapshot?.totalSeconds, 3600);
    expect(sheet.isFirstPassApproved, isTrue);
  });

  group('computeStreak', () {
    test('streak counts weekdays back from today, skipping weekends', () {
      // today Mon Sep 28 (no sheet);
      // sheets: Wed Sep 23 pending, Thu Sep 24 pending, Fri Sep 25 approved
      final sheets = [
        makeSheet(id: 'a', workDate: DateTime.utc(2026, 9, 23), status: 'pending'),
        makeSheet(id: 'b', workDate: DateTime.utc(2026, 9, 24), status: 'pending'),
        makeSheet(id: 'c', workDate: DateTime.utc(2026, 9, 25), status: 'approved'),
      ];
      final result = computeStreak(
        sheets: sheets,
        leaveDays: {},
        today: DateTime.utc(2026, 9, 28),
      );
      expect(result.current, 3);
    });

    test('a disapproved day breaks the streak', () {
      // Fri Sep 25 disapproved -> streak breaks immediately after skipping today
      final sheets = [
        makeSheet(id: 'a', workDate: DateTime.utc(2026, 9, 25), status: 'disapproved'),
      ];
      final result = computeStreak(
        sheets: sheets,
        leaveDays: {},
        today: DateTime.utc(2026, 9, 28),
      );
      expect(result.current, 0);
    });

    test('approved leave days are neutral', () {
      // Thu Sep 24 in leaveDays (no sheet); Wed Sep 23 approved, Fri Sep 25 approved;
      // today Mon Sep 28 (no sheet) -> current 2
      final sheets = [
        makeSheet(id: 'a', workDate: DateTime.utc(2026, 9, 23), status: 'approved'),
        makeSheet(id: 'b', workDate: DateTime.utc(2026, 9, 25), status: 'approved'),
      ];
      final result = computeStreak(
        sheets: sheets,
        leaveDays: {DateTime.utc(2026, 9, 24)},
        today: DateTime.utc(2026, 9, 28),
      );
      expect(result.current, 2);
    });

    test('best streak finds the longest earlier run', () {
      // Earlier run of 4: Mon Sep 7, Tue Sep 8, Wed Sep 9, Thu Sep 10 all approved
      // Then gap (Fri Sep 11 missing), later Fri Sep 25 approved (run=1)
      // today Mon Sep 28 (no sheet) -> current=1, best=4
      final sheets = [
        makeSheet(id: 'a', workDate: DateTime.utc(2026, 9, 7), status: 'approved'),
        makeSheet(id: 'b', workDate: DateTime.utc(2026, 9, 8), status: 'approved'),
        makeSheet(id: 'c', workDate: DateTime.utc(2026, 9, 9), status: 'approved'),
        makeSheet(id: 'd', workDate: DateTime.utc(2026, 9, 10), status: 'approved'),
        makeSheet(id: 'e', workDate: DateTime.utc(2026, 9, 25), status: 'approved'),
      ];
      final result = computeStreak(
        sheets: sheets,
        leaveDays: {},
        today: DateTime.utc(2026, 9, 28),
      );
      expect(result.best, 4);
    });
  });

  group('firstPassRate', () {
    test('first-pass rate over 30 days', () {
      // 2 approved(r=0), 1 approved(r=1), 1 disapproved -> 2 first-pass / 4 reviewed = 0.5
      final now = DateTime.utc(2026, 9, 28);
      final base = DateTime.utc(2026, 9, 20);
      final sheets = [
        makeSheet(id: 'a', workDate: base, status: 'approved', resubmissions: 0),
        makeSheet(
            id: 'b',
            workDate: base.add(const Duration(days: 1)),
            status: 'approved',
            resubmissions: 0),
        makeSheet(
            id: 'c',
            workDate: base.add(const Duration(days: 2)),
            status: 'approved',
            resubmissions: 1),
        makeSheet(
            id: 'd',
            workDate: base.add(const Duration(days: 3)),
            status: 'disapproved',
            resubmissions: 0),
      ];
      final stats = computeProgrammerStats(
        userId: 'user1',
        now: now,
        tasks: [],
        sheets: sheets,
        leaveDays: {},
        todayFocus: Duration.zero,
      );
      expect(stats.firstPassRate, closeTo(0.5, 0.001));
    });

    test('no reviewed sheets gives null first-pass rate', () {
      final stats = computeProgrammerStats(
        userId: 'user1',
        now: DateTime.utc(2026, 9, 28),
        tasks: [],
        sheets: [
          makeSheet(
              id: 'a',
              workDate: DateTime.utc(2026, 9, 20),
              status: 'draft',
              resubmissions: 0),
        ],
        leaveDays: {},
        todayFocus: Duration.zero,
      );
      expect(stats.firstPassRate, isNull);
    });
  });

  test('completedThisWeek uses a Monday-start week', () {
    // now = Mon Sep 28, 2026
    // week Mon Sep 28 - Sun Oct 4; last week Mon Sep 21 - Sun Sep 27
    final now = DateTime.utc(2026, 9, 28);

    ProgrammerTask makeTask(String id, DateTime completedAt) {
      return ProgrammerTask(
        id: id,
        title: 'Task $id',
        category: ProgrammerTaskCategory.others,
        status: ProgrammerTaskStatus.completed,
        assigneeId: 'user1',
        createdAt: DateTime.utc(2026, 1, 1),
        updatedAt: DateTime.utc(2026, 1, 1),
        completedAt: completedAt,
      );
    }

    final tasks = [
      makeTask('t1', DateTime.utc(2026, 9, 28)), // this week (Mon)
      makeTask('t2', DateTime.utc(2026, 9, 29)), // this week (Tue)
      makeTask('t3', DateTime.utc(2026, 9, 27)), // last week (Sun Sep 27)
      makeTask('t4', DateTime.utc(2026, 9, 21)), // last week (Mon Sep 21)
    ];

    final stats = computeProgrammerStats(
      userId: 'user1',
      now: now,
      tasks: tasks,
      sheets: [],
      leaveDays: {},
      todayFocus: Duration.zero,
    );

    expect(stats.completedThisWeek, 2);
    expect(stats.completedLastWeek, 2);
  });

  group('computeBadges', () {
    test('tiered badge shows highest earned tier and next target', () {
      final b =
          computeBadges(statsWith(completedTotal: 12), includeSheetBadges: false)
              .firstWhere((b) => b.id == 'finisher');
      expect(b.earned, isTrue);
      expect(b.title, 'Finisher · 10');
      expect(b.target, 50);
    });

    test('includeSheetBadges false hides sheet-based badges', () {
      final ids =
          computeBadges(statsWith(), includeSheetBadges: false)
              .map((b) => b.id)
              .toSet();
      expect(
          ids,
          isNot(containsAll(
              ['deep_work', 'on_a_roll', 'team_player', 'clean_week'])));
    });
  });
}