using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Moq;
using FluentAssertions;
using Xunit;
using Haoliang.Api.Controllers;
using Haoliang.Core.Services;
using Haoliang.Models.Common;
using Haoliang.Models.System;

namespace Haoliang.Tests.Controllers
{
    public class AlarmControllerTests
    {
        private readonly Mock<IAlarmService> _alarmService;
        private readonly Mock<IAlarmRuleService> _alarmRuleService;
        private readonly Mock<IAlarmNotificationService> _notificationService;
        private readonly Mock<ILoggingService> _loggingService;
        private readonly AlarmController _controller;

        public AlarmControllerTests()
        {
            _alarmService = new Mock<IAlarmService>();
            _alarmRuleService = new Mock<IAlarmRuleService>();
            _notificationService = new Mock<IAlarmNotificationService>();
            _loggingService = new Mock<ILoggingService>();
            _controller = new AlarmController(
                _alarmService.Object,
                _alarmRuleService.Object,
                _notificationService.Object,
                _loggingService.Object);
        }

        // GetAllAlarms - 3 branches
        [Fact]
        public async Task GetAllAlarms_WithType_ReturnsOk()
        {
            _alarmService.Setup(s => s.GetAlarmsByTypeAsync(It.IsAny<AlarmType>()))
                .ReturnsAsync(new List<Alarm>());

            var result = await _controller.GetAllAlarms(AlarmType.DeviceError);

            result.Should().BeOfType<OkObjectResult>();
        }

        [Fact]
        public async Task GetAllAlarms_WithStatus_ReturnsOk()
        {
            _alarmService.Setup(s => s.GetActiveAlarmsAsync())
                .ReturnsAsync(new List<Alarm>());

            var result = await _controller.GetAllAlarms(null, AlarmStatus.Active);

            result.Should().BeOfType<OkObjectResult>();
        }

        [Fact]
        public async Task GetAllAlarms_WithoutFilters_ReturnsOk()
        {
            _alarmService.Setup(s => s.GetAllAlarmsAsync())
                .ReturnsAsync(new List<Alarm>());

            var result = await _controller.GetAllAlarms();

            result.Should().BeOfType<OkObjectResult>();
        }

        [Fact]
        public async Task GetAllAlarms_WhenException_Returns500()
        {
            _alarmService.Setup(s => s.GetAllAlarmsAsync())
                .ThrowsAsync(new Exception("test"));

            var result = await _controller.GetAllAlarms();

            var objResult = result.Should().BeOfType<ObjectResult>().Subject;
            objResult.StatusCode.Should().Be(500);
        }

        // GetAlarm
        [Fact]
        public async Task GetAlarm_WhenFound_ReturnsOk()
        {
            _alarmService.Setup(s => s.GetAlarmByIdAsync(1))
                .ReturnsAsync(new Alarm());

            var result = await _controller.GetAlarm(1);

            result.Should().BeOfType<OkObjectResult>();
        }

        [Fact]
        public async Task GetAlarm_WhenNotFound_ReturnsNotFound()
        {
            _alarmService.Setup(s => s.GetAlarmByIdAsync(999))
                .ReturnsAsync((Alarm?)null);

            var result = await _controller.GetAlarm(999);

            result.Should().BeOfType<NotFoundObjectResult>();
        }

        [Fact]
        public async Task GetAlarm_WhenException_Returns500()
        {
            _alarmService.Setup(s => s.GetAlarmByIdAsync(It.IsAny<int>()))
                .ThrowsAsync(new Exception("test"));

            var result = await _controller.GetAlarm(1);

            var objResult = result.Should().BeOfType<ObjectResult>().Subject;
            objResult.StatusCode.Should().Be(500);
        }

        // CreateAlarm
        [Fact]
        public async Task CreateAlarm_WhenSuccess_ReturnsOk()
        {
            _alarmService.Setup(s => s.CreateAlarmAsync(It.IsAny<Alarm>()))
                .ReturnsAsync(new Alarm());

            var result = await _controller.CreateAlarm(new Alarm());

            result.Should().BeOfType<OkObjectResult>();
        }

        [Fact]
        public async Task CreateAlarm_WhenException_Returns500()
        {
            _alarmService.Setup(s => s.CreateAlarmAsync(It.IsAny<Alarm>()))
                .ThrowsAsync(new Exception("test"));

            var result = await _controller.CreateAlarm(new Alarm());

            var objResult = result.Should().BeOfType<ObjectResult>().Subject;
            objResult.StatusCode.Should().Be(500);
        }

        // UpdateAlarm
        [Fact]
        public async Task UpdateAlarm_WhenFound_ReturnsOk()
        {
            _alarmService.Setup(s => s.UpdateAlarmAsync(It.IsAny<int>(), It.IsAny<Alarm>()))
                .ReturnsAsync(new Alarm());

            var result = await _controller.UpdateAlarm(1, new Alarm());

            result.Should().BeOfType<OkObjectResult>();
        }

        [Fact]
        public async Task UpdateAlarm_WhenNotFound_ReturnsNotFound()
        {
            _alarmService.Setup(s => s.UpdateAlarmAsync(It.IsAny<int>(), It.IsAny<Alarm>()))
                .ReturnsAsync((Alarm?)null);

            var result = await _controller.UpdateAlarm(999, new Alarm());

            result.Should().BeOfType<NotFoundObjectResult>();
        }

        [Fact]
        public async Task UpdateAlarm_WhenException_Returns500()
        {
            _alarmService.Setup(s => s.UpdateAlarmAsync(It.IsAny<int>(), It.IsAny<Alarm>()))
                .ThrowsAsync(new Exception("test"));

            var result = await _controller.UpdateAlarm(1, new Alarm());

            var objResult = result.Should().BeOfType<ObjectResult>().Subject;
            objResult.StatusCode.Should().Be(500);
        }

        // DeleteAlarm
        [Fact]
        public async Task DeleteAlarm_WhenFound_ReturnsOk()
        {
            _alarmService.Setup(s => s.DeleteAlarmAsync(1))
                .ReturnsAsync(true);

            var result = await _controller.DeleteAlarm(1);

            result.Should().BeOfType<OkObjectResult>();
        }

        [Fact]
        public async Task DeleteAlarm_WhenNotFound_ReturnsNotFound()
        {
            _alarmService.Setup(s => s.DeleteAlarmAsync(999))
                .ReturnsAsync(false);

            var result = await _controller.DeleteAlarm(999);

            result.Should().BeOfType<NotFoundObjectResult>();
        }

        [Fact]
        public async Task DeleteAlarm_WhenException_Returns500()
        {
            _alarmService.Setup(s => s.DeleteAlarmAsync(It.IsAny<int>()))
                .ThrowsAsync(new Exception("test"));

            var result = await _controller.DeleteAlarm(1);

            var objResult = result.Should().BeOfType<ObjectResult>().Subject;
            objResult.StatusCode.Should().Be(500);
        }

        // ResolveAlarm
        [Fact]
        public async Task ResolveAlarm_WhenFound_ReturnsOk()
        {
            _alarmService.Setup(s => s.ResolveAlarmAsync(1, It.IsAny<string?>()))
                .ReturnsAsync(true);

            var result = await _controller.ResolveAlarm(1, new ResolveAlarmRequest { ResolutionNote = "fixed" });

            result.Should().BeOfType<OkObjectResult>();
        }

        [Fact]
        public async Task ResolveAlarm_WhenNotFound_ReturnsNotFound()
        {
            _alarmService.Setup(s => s.ResolveAlarmAsync(It.IsAny<int>(), It.IsAny<string?>()))
                .ReturnsAsync(false);

            var result = await _controller.ResolveAlarm(999, new ResolveAlarmRequest());

            result.Should().BeOfType<NotFoundObjectResult>();
        }

        [Fact]
        public async Task ResolveAlarm_WhenException_Returns500()
        {
            _alarmService.Setup(s => s.ResolveAlarmAsync(It.IsAny<int>(), It.IsAny<string?>()))
                .ThrowsAsync(new Exception("test"));

            var result = await _controller.ResolveAlarm(1, new ResolveAlarmRequest());

            var objResult = result.Should().BeOfType<ObjectResult>().Subject;
            objResult.StatusCode.Should().Be(500);
        }

        // AcknowledgeAlarm
        [Fact]
        public async Task AcknowledgeAlarm_WhenFound_ReturnsOk()
        {
            _alarmService.Setup(s => s.AcknowledgeAlarmAsync(1, It.IsAny<string?>()))
                .ReturnsAsync(true);

            var result = await _controller.AcknowledgeAlarm(1, new AcknowledgeAlarmRequest { AcknowledgeNote = "ok" });

            result.Should().BeOfType<OkObjectResult>();
        }

        [Fact]
        public async Task AcknowledgeAlarm_WhenNotFound_ReturnsNotFound()
        {
            _alarmService.Setup(s => s.AcknowledgeAlarmAsync(It.IsAny<int>(), It.IsAny<string?>()))
                .ReturnsAsync(false);

            var result = await _controller.AcknowledgeAlarm(999, new AcknowledgeAlarmRequest());

            result.Should().BeOfType<NotFoundObjectResult>();
        }

        [Fact]
        public async Task AcknowledgeAlarm_WhenException_Returns500()
        {
            _alarmService.Setup(s => s.AcknowledgeAlarmAsync(It.IsAny<int>(), It.IsAny<string?>()))
                .ThrowsAsync(new Exception("test"));

            var result = await _controller.AcknowledgeAlarm(1, new AcknowledgeAlarmRequest());

            var objResult = result.Should().BeOfType<ObjectResult>().Subject;
            objResult.StatusCode.Should().Be(500);
        }

        // GetDeviceAlarms
        [Fact]
        public async Task GetDeviceAlarms_WhenSuccess_ReturnsOk()
        {
            _alarmService.Setup(s => s.GetDeviceAlarmsAsync(1, 7))
                .ReturnsAsync(new List<Alarm>());

            var result = await _controller.GetDeviceAlarms(1);

            result.Should().BeOfType<OkObjectResult>();
        }

        [Fact]
        public async Task GetDeviceAlarms_WhenException_Returns500()
        {
            _alarmService.Setup(s => s.GetDeviceAlarmsAsync(It.IsAny<int>(), It.IsAny<int>()))
                .ThrowsAsync(new Exception("test"));

            var result = await _controller.GetDeviceAlarms(1);

            var objResult = result.Should().BeOfType<ObjectResult>().Subject;
            objResult.StatusCode.Should().Be(500);
        }

        // GetCriticalAlarms
        [Fact]
        public async Task GetCriticalAlarms_WhenSuccess_ReturnsOk()
        {
            _alarmService.Setup(s => s.GetCriticalAlarmsAsync())
                .ReturnsAsync(new List<Alarm>());

            var result = await _controller.GetCriticalAlarms();

            result.Should().BeOfType<OkObjectResult>();
        }

        [Fact]
        public async Task GetCriticalAlarms_WhenException_Returns500()
        {
            _alarmService.Setup(s => s.GetCriticalAlarmsAsync())
                .ThrowsAsync(new Exception("test"));

            var result = await _controller.GetCriticalAlarms();

            var objResult = result.Should().BeOfType<ObjectResult>().Subject;
            objResult.StatusCode.Should().Be(500);
        }

        // GetAlarmStatistics
        [Fact]
        public async Task GetAlarmStatistics_WhenSuccess_ReturnsOk()
        {
            _alarmService.Setup(s => s.GetAlarmStatisticsAsync(It.IsAny<DateTime>()))
                .ReturnsAsync(new AlarmStatistics());

            var result = await _controller.GetAlarmStatistics(DateTime.Today);

            result.Should().BeOfType<OkObjectResult>();
        }

        [Fact]
        public async Task GetAlarmStatistics_WhenException_Returns500()
        {
            _alarmService.Setup(s => s.GetAlarmStatisticsAsync(It.IsAny<DateTime>()))
                .ThrowsAsync(new Exception("test"));

            var result = await _controller.GetAlarmStatistics(DateTime.Today);

            var objResult = result.Should().BeOfType<ObjectResult>().Subject;
            objResult.StatusCode.Should().Be(500);
        }

        // GetAlarmsByDateRange
        [Fact]
        public async Task GetAlarmsByDateRange_WhenSuccess_ReturnsOk()
        {
            _alarmService.Setup(s => s.GetAlarmsByDateRangeAsync(It.IsAny<DateTime>(), It.IsAny<DateTime>()))
                .ReturnsAsync(new List<Alarm>());

            var result = await _controller.GetAlarmsByDateRange(DateTime.Today, DateTime.Today);

            result.Should().BeOfType<OkObjectResult>();
        }

        [Fact]
        public async Task GetAlarmsByDateRange_WhenException_Returns500()
        {
            _alarmService.Setup(s => s.GetAlarmsByDateRangeAsync(It.IsAny<DateTime>(), It.IsAny<DateTime>()))
                .ThrowsAsync(new Exception("test"));

            var result = await _controller.GetAlarmsByDateRange(DateTime.Today, DateTime.Today);

            var objResult = result.Should().BeOfType<ObjectResult>().Subject;
            objResult.StatusCode.Should().Be(500);
        }

        // TestNotification
        [Fact]
        public async Task TestNotification_WhenSuccess_ReturnsOk()
        {
            var result = await _controller.TestNotification(new TestNotificationRequest
            {
                DeviceId = 1,
                NotificationType = NotificationType.Email,
                Recipient = "test@test.com"
            });

            result.Should().BeOfType<OkObjectResult>();
        }

        [Fact]
        public async Task TestNotification_WhenException_Returns500()
        {
            _notificationService.Setup(s => s.SendAlarmNotificationAsync(It.IsAny<AlarmNotification>()))
                .ThrowsAsync(new Exception("test"));

            var result = await _controller.TestNotification(new TestNotificationRequest());

            var objResult = result.Should().BeOfType<ObjectResult>().Subject;
            objResult.StatusCode.Should().Be(500);
        }

        // GetAlarmRules
        [Fact]
        public async Task GetAlarmRules_WhenSuccess_ReturnsOk()
        {
            _alarmRuleService.Setup(s => s.GetAllAlarmRulesAsync())
                .ReturnsAsync(new List<AlarmRule>());

            var result = await _controller.GetAlarmRules();

            result.Should().BeOfType<OkObjectResult>();
        }

        [Fact]
        public async Task GetAlarmRules_WhenException_Returns500()
        {
            _alarmRuleService.Setup(s => s.GetAllAlarmRulesAsync())
                .ThrowsAsync(new Exception("test"));

            var result = await _controller.GetAlarmRules();

            var objResult = result.Should().BeOfType<ObjectResult>().Subject;
            objResult.StatusCode.Should().Be(500);
        }

        // CreateAlarmRule
        [Fact]
        public async Task CreateAlarmRule_WhenSuccess_ReturnsOk()
        {
            _alarmRuleService.Setup(s => s.CreateAlarmRuleAsync(It.IsAny<AlarmRule>()))
                .ReturnsAsync(new AlarmRule());

            var result = await _controller.CreateAlarmRule(new AlarmRule());

            result.Should().BeOfType<OkObjectResult>();
        }

        [Fact]
        public async Task CreateAlarmRule_WhenException_Returns500()
        {
            _alarmRuleService.Setup(s => s.CreateAlarmRuleAsync(It.IsAny<AlarmRule>()))
                .ThrowsAsync(new Exception("test"));

            var result = await _controller.CreateAlarmRule(new AlarmRule());

            var objResult = result.Should().BeOfType<ObjectResult>().Subject;
            objResult.StatusCode.Should().Be(500);
        }

        // TestAlarmRule
        [Fact]
        public async Task TestAlarmRule_WhenSuccess_ReturnsOk()
        {
            var result = await _controller.TestAlarmRule(1);

            result.Should().BeOfType<OkObjectResult>();
        }

        [Fact]
        public async Task TestAlarmRule_WhenException_Returns500()
        {
            _alarmRuleService.Setup(s => s.TestAlarmRuleAsync(It.IsAny<int>()))
                .ThrowsAsync(new Exception("test"));

            var result = await _controller.TestAlarmRule(1);

            var objResult = result.Should().BeOfType<ObjectResult>().Subject;
            objResult.StatusCode.Should().Be(500);
        }
    }
}