using LCU.Library.Internal.IncentiveApiModels.Entities;
using LCU.Library.Internal.IncentiveApiModels.Common;
using LCU.Library.Internal.IncentiveApiModels.Requests;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.FeatureManagement.Mvc;
using LCU.API.Internal.Operations.IncentiveApi.Services;
using LCU.API.Internal.Operations.IncentiveApi.Models.DataTransfer;
using LCU.API.Internal.Operations.IncentiveApi.Models.GoalDispersal;
using LCU.API.Internal.Operations.IncentiveApi.Authorization;
using LCU.API.Internal.Operations.IncentiveApi.Configuration;
using LCU.API.Internal.Operations.IncentiveApiLib.Services;
using LCU.API.Internal.Operations.IncentiveApiLib.Persistence;

namespace LCU.API.Internal.Operations.IncentiveApi.Controllers;

[FeatureGate(FeatureFlags.EnableControllers)]
[ApiController]
[Route("api/[controller]")]
[Authorize(AuthenticationSchemes = JwtBearerDefaults.AuthenticationScheme)]
public class GoalController : ControllerBase
{
    private readonly IGoalService _goalService;
    private readonly IGoalDispersalService _goalDispersalService;
    private readonly IUserService _userService;
    private readonly ICurrentUserService _currentUser;

    public GoalController(IGoalService goalService, IGoalDispersalService goalDispersalService, ICurrentUserService currentUser, IUserService userService)
    {
        _goalService = goalService;
        _currentUser = currentUser;
        _userService = userService;
        _goalDispersalService = goalDispersalService;
    }

    [HttpGet("", Name = "GetGoals")]
    public async Task<IActionResult> GetGoals([FromQuery] int fromMonth, [FromQuery] int fromYear,
        [FromQuery] int toMonth, [FromQuery] int toYear, [FromQuery] int departmentId,
        [FromQuery] bool includePersonnel = true)
    {
        try
        {
            var monthRange = new MonthRange(fromYear, fromMonth, toYear, toMonth);
            var query = new GoalSearchRequest()
            {
                DateRange = monthRange,
                departmentId = departmentId,
                IncludePersonnel = includePersonnel
            };

            var result = await _goalService.GetGoalsAsync(query);
            return Ok(result);
        }
        catch (Exception ex)
        {
            Log.Error(ex, $"Failure in {GetType().Name}");
            return StatusCode(StatusCodes.Status500InternalServerError);
        }
    }


    [HttpGet("department/", Name = "GetAllDepartmentsGoals")]
    public async Task<IActionResult> GetAllDepartmentsGoals([FromQuery] int year)
    {
        try
        {
            var searchYear = year > 0 ? year : DateTime.Now.Year;
            var result = await _goalService.GetAllAnnualDepartmentGoalsAsync(searchYear);
            return Ok(result);
        }
        catch (Exception ex)
        {
            Log.Error(ex, $"Failure in {GetType().Name}");
            return StatusCode(StatusCodes.Status500InternalServerError);
        }
    }

    [HttpGet("department/{departmentId}", Name = "GetDepartmentGoals")]
    public async Task<IActionResult> GetDepartmentGoals(int departmentId, [FromQuery] int year)
    {
        try
        {
            var searchYear = year > 0 ? year : DateTime.Now.Year;
            var result = await _goalService.GetAnnualDepartmentGoalsAsync(departmentId, searchYear);
            return Ok(result);
        }
        catch (Exception ex)
        {
            Log.Error(ex, $"Failure in {GetType().Name}");
            return StatusCode(StatusCodes.Status500InternalServerError);
        }
    }

    [HttpGet("personnel/{departmentId}", Name = "GetPersonnelGoals")]
    public async Task<IActionResult> GetPersonnelGoals(int departmentId, [FromQuery] int month,
        [FromQuery] int year, [FromQuery] bool includeAllPersonnel  = false)
    {
        try
        {
            var searchYear = year > 0 ? year : DateTime.Now.Year;
            var searchMonth = month > 0 ? month : DateTime.Now.Month;
            var searchRequest = new DepartmentPersonnelSearchRequest()
            {
                DepartmentId = departmentId,
                Month = searchMonth,
                Year = searchYear,
                IncludeAllPersonnel = includeAllPersonnel
            };
            var result = await _goalService.GetMonthlyPersonnelGoalsAsync(searchRequest);
            return Ok(result);
        }
        catch (Exception ex)
        {
            Log.Error(ex, $"Failure in {GetType().Name}");
            return StatusCode(StatusCodes.Status500InternalServerError);
        }
    }

    [HttpPost("personnel/{departmentId}/disperse", Name = "DisperseByExtrapolation")]
    public async Task<IActionResult> GetPersonnelGoals(int departmentId, [FromBody] ExtrapolateGoalDispersalRequest request)
    {
        try
        {
            var result = await _goalDispersalService.DisperseGoalsByExtrapolatingLastMonth(departmentId, request.Month, request.Year);
            return Ok(result);
        }
        catch (Exception ex)
        {
            Log.Error(ex, $"Failure in {GetType().Name}");
            return StatusCode(StatusCodes.Status500InternalServerError);
        }
    }

    [HttpGet("me", Name = "GetCurrentUserGoals")]
    [RequirePermission("VIEW_DASHBOARD")]
    public async Task<IActionResult> GetCurrentUserGoals([FromQuery] int fromMonth, [FromQuery] int fromYear,
        [FromQuery] int toMonth, [FromQuery] int toYear)
    {
        try
        {
            var monthRange = new MonthRange(fromYear, fromMonth, toYear, toMonth);
            var appUser = _currentUser.GetCurrentUser();

            if (appUser?.Email == null)
            {
                return Unauthorized("No AD User Found.");
            }

            var employee = await _userService.GetUserByAdEmailAsync(appUser.Email);
            if (employee == null)
            {
                return NoContent();
            }

            var result = await _goalService.GetEmployeeGoalsForMonthRangeAsync(employee, monthRange);
            return Ok(result);
        }
        catch (Exception ex)
        {
            Log.Error(ex, $"Failure in {GetType().Name}");
            return StatusCode(StatusCodes.Status500InternalServerError);
        }
    }

    [HttpGet("me/departments", Name = "GetCurrentUserDepartmentsGoals")]
    [RequirePermission("VIEW_DASHBOARD,VIEW_PERFORMANCE_FOR_DEPARTMENT")]
    public async Task<IActionResult> GetCurrentUserDepartmentsGoals([FromQuery] int fromMonth,
        [FromQuery] int fromYear,
        [FromQuery] int toMonth, [FromQuery] int toYear)
    {
        try
        {
            var monthRange = new MonthRange(fromYear, fromMonth, toYear, toMonth);
            var appUser = _currentUser.GetCurrentUser();

            if (appUser?.Email == null)
            {
                return Unauthorized("No AD User Found.");
            }

            var employee = await _userService.GetUserByAdEmailAsync(appUser.Email);
            if (employee == null)
            {
                return NoContent();
            }

            var result = await _goalService.GetEmployeeDepartmentsGoalsForMonthRangeAsync(employee, monthRange);
            return Ok(result);
        }
        catch (Exception ex)
        {
            Log.Error(ex, $"Failure in {GetType().Name}");
            return StatusCode(StatusCodes.Status500InternalServerError);
        }
    }

    [HttpPost]
    public async Task<IActionResult> SetGoalForAudienceAndTimePeriod(GoalChange goalChange)
    {
        try
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            var result = await _goalService.SaveGoalAsync(goalChange);
            return Created($"{result.Select(x => x.Id)}", result);
        }
        catch (Exception ex)
        {
            Log.Error(ex, $"Failure in {GetType().Name}.");
            return StatusCode(StatusCodes.Status500InternalServerError);
        }
    }

    [HttpPost("multi")]
    public async Task<IActionResult> SetGoalsForAudienceAndTimePeriod(List<GoalChange> goalChanges)
    {
        try
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            var result = await _goalService.SaveGoalRangeAsync(goalChanges);
            return Created($"{result.Count}", result);
        }
        catch (Exception ex)
        {
            Log.Error(ex, $"Failure in {GetType().Name}.");
            return StatusCode(StatusCodes.Status500InternalServerError);
        }
    }

    [HttpPost("DisperseAll")]
    public async Task<IActionResult> DisperseAll(GoalDispersalRequest request)
    {
        try
        {
            await _goalDispersalService.ExecuteMonthStartDispersal(request);
            return Ok();
        }
        catch (Exception ex)
        {
            Log.Error(ex, $"Failure in {GetType().Name}.");
            return StatusCode(StatusCodes.Status500InternalServerError);
        }
    }

    [HttpPost("personnel/CustomWeightedDispersal")]
    public async Task<IActionResult> CustomWeightedDispersal([FromBody] CustomWeightedDispersalRequest request)
    {
        try
        {
            var result = await _goalDispersalService.CustomWeightedDispersal(request);
            return Ok(result);
        }
        catch (Exception ex)
        {
            Log.Error(ex, $"Failure in {GetType().Name}.");
            return StatusCode(StatusCodes.Status500InternalServerError);
        }
    }
}