using Marco.Pms.DataAccess.Data;
using Marco.Pms.Model.Activities;
using Marco.Pms.Model.Projects;
using Marco.Pms.Model.Utilities;
using Marco.Pms.Model.ViewModels.DashBoard;
using MarcoBMS.Services.Helpers;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

namespace Marco.Pms.Services.Controllers
{
    [Authorize]
    [Route("api/[controller]")]
    [ApiController]
    public class DashboardController : ControllerBase
    {
        private readonly ApplicationDbContext _context;
        private readonly UserHelper _userHelper;
        public DashboardController(ApplicationDbContext context,UserHelper userHelper)
        {
            _context = context;
            _userHelper = userHelper;
        }
        [HttpGet("progression")]
        public async Task<IActionResult> GetGraph([FromQuery] double days,[FromQuery] int projectId, [FromQuery] string? FromDate)
        {
            var tenantId = _userHelper.GetTenantId();
            DateTime fromDate = new DateTime();
            DateTime toDate = new DateTime();
            List<ProjectProgressionVM>? projectProgressionVMs = new List<ProjectProgressionVM>();
            if (FromDate != null && DateTime.TryParse(FromDate, out fromDate) == false)
            {
                return BadRequest(ApiResponse<object>.ErrorResponse("Invalid starting date.", "Invalid starting date.", 400));

            }
            if(projectId == null) { projectId = 0; }

            if (FromDate == null) fromDate = DateTime.UtcNow.Date;

            if (days >= 0)
            {
                double negativeDays = 0 - days;
                toDate = fromDate.AddDays(negativeDays);
                if (projectId == 0)
                {
                    List<TaskAllocation> tasks = await _context.TaskAllocations.Where(t => t.AssignmentDate <= fromDate && t.AssignmentDate >= toDate && t.TenantId == tenantId).ToListAsync();
                    
                    double flagDays = 0;
                    while (negativeDays < flagDays)
                    {
                        ProjectProgressionVM ProjectProgressionVM = new ProjectProgressionVM();
                        ProjectProgressionVM.ProjectId = projectId;
                        ProjectProgressionVM.ProjectName = "";
                        var date = fromDate.AddDays(flagDays);
                        var todayTasks = tasks.Where(t => t.AssignmentDate.Date == date.Date).ToList();
                        double plannedTaks = 0;
                        double completedTasks = 0;
                        ProjectProgressionVM.Date = date;

                        foreach (var task in todayTasks)
                        {
                            plannedTaks += task.PlannedTask;
                            completedTasks += task.CompletedTask;
                        }
                        ProjectProgressionVM.PlannedTask = plannedTaks;
                        ProjectProgressionVM.CompletedTask = completedTasks;

                        projectProgressionVMs.Add(ProjectProgressionVM);
                        flagDays -= 1;
                    }
                }
                else
                {
                    var project = await _context.Projects.FirstOrDefaultAsync(p => p.Id == projectId);
                    List<Building> buildings = await _context.Buildings.Where(b => b.ProjectId == projectId && b.TenantId == tenantId).ToListAsync();
                    List<int> idList = buildings.Select(b => b.Id).ToList();

                    List<Floor> floors = await _context.Floor.Where(f => idList.Contains(f.BuildingId) && f.TenantId == tenantId).ToListAsync();
                    idList = floors.Select(f => f.Id).ToList();

                    List<WorkArea> workAreas = await _context.WorkAreas.Where(a => idList.Contains(a.FloorId) && a.TenantId == tenantId).ToListAsync();
                    idList = workAreas.Select(a => a.Id).ToList();

                    List<WorkItem> workItems = await _context.WorkItems.Where(i => idList.Contains(i.WorkAreaId) && i.TenantId == tenantId).ToListAsync();
                    idList = workItems.Select(i => i.Id).ToList();

                    List<TaskAllocation> tasks = await _context.TaskAllocations.Where(t => idList.Contains(t.WorkItemId) && t.AssignmentDate <= fromDate && t.AssignmentDate >= toDate && t.TenantId == tenantId).ToListAsync();
                    if(project != null)
                    {
                        double flagDays = 0;
                        while (negativeDays < flagDays)
                        {
                            ProjectProgressionVM projectProgressionVM = new ProjectProgressionVM();
                            projectProgressionVM.ProjectId = projectId;
                            projectProgressionVM.ProjectName = project.Name;
                            var date = fromDate.AddDays(flagDays);
                            var todayTasks = tasks.Where(t => t.AssignmentDate.Date == date.Date).ToList();
                            double plannedTaks = 0;
                            double completedTasks = 0;
                            projectProgressionVM.Date = date;

                            foreach (var task in todayTasks)
                            {
                                plannedTaks += task.PlannedTask;
                                completedTasks += task.CompletedTask;
                            }
                            projectProgressionVM.PlannedTask = plannedTaks;
                            projectProgressionVM.CompletedTask = completedTasks;

                            projectProgressionVMs.Add(projectProgressionVM);
                            flagDays -= 1;
                        }
                    }
                }
            }
            return Ok(ApiResponse<object>.SuccessResponse(projectProgressionVMs, "Success", 200));
        }

        [HttpGet("projects")]
        public async Task<IActionResult> GetProjectCount()
        {
            var tenantId = _userHelper.GetTenantId();

            var projects = await _context.Projects.Where(p => p.TenantId == tenantId && p.ProjectStatusId != 4).ToListAsync();
            var ongoingProjects = projects.Where(p => p.ProjectStatusId == 1).ToList();

            ProjectDashboardVM projectDashboardVM = new ProjectDashboardVM
            {
                TotalProjects = projects.Count(),
                OngoingProjects = ongoingProjects.Count()
            };
            return Ok(ApiResponse<object>.SuccessResponse(projectDashboardVM, "Success", 200));
        }


        [HttpGet("teams")]
        public async Task<IActionResult> GetTotalEmployees()
        {
            var tenantId = _userHelper.GetTenantId();
            var date = DateTime.UtcNow.Date;

            var Employees = await _context.Employees.Where(e => e.TenantId == tenantId && e.IsActive == true).Select(e => e.Id).ToListAsync();

            var checkedInEmployee = await _context.Attendes.Where(e => e.Date.Date == date ).ToListAsync();

            TeamDashboardVM teamDashboardVM = new TeamDashboardVM
            {
                TotalEmployees = Employees.Count(),
                InToday = checkedInEmployee.Count()
            };
            return Ok(ApiResponse<object>.SuccessResponse(teamDashboardVM, "Success", 200));
        }

        [HttpGet("tasks")]
        public async Task<IActionResult> GetTotalTasks()
        {
            var tenantId = _userHelper.GetTenantId();

            var Tasks = await _context.WorkItems.Where(t => t.TenantId == tenantId).Select(t => new { PlannedWork = t.PlannedWork, CompletedWork = t.CompletedWork}).ToListAsync();
            TasksDashboardVM tasksDashboardVM = new TasksDashboardVM
            {
                TotalTasks = 0,
                CompletedTasks = 0
            };
            foreach (var task in Tasks)
            {
                tasksDashboardVM.TotalTasks += task.PlannedWork;
                tasksDashboardVM.CompletedTasks += task.CompletedWork;
            }

            return Ok(ApiResponse<object>.SuccessResponse(tasksDashboardVM, "Success", 200));
        }
    }
}