using Microsoft.AspNetCore.Mvc;
using RobotNet10.FleetManager.Data;
using RobotNet10.FleetManager.Services;
using RobotNet10.FleetManager.Shared.DTOs.Robot;
using RobotNet10.FleetManager.Shared.DTOs.Responses;

namespace RobotNet10.FleetManager.Controllers;

/// <summary>
/// API controller for managing robots.
/// Provides RESTful endpoints for CRUD operations on robots.
/// </summary>
/// <remarks>
/// All endpoints return appropriate HTTP status codes and error responses.
/// Supports filtering by model ID and map ID.
/// </remarks>
[ApiController]
[Route("api/robots")]
public class RobotController(IRobotService robotService, Services.Logger<RobotController> logger) : ControllerBase
{
    private readonly IRobotService _robotService = robotService;
    private readonly Services.Logger<RobotController> _logger = logger;

    /// <summary>
    /// Get all robots with optional filters
    /// </summary>
    [HttpGet]
    [ProducesResponseType(typeof(List<RobotDto>), StatusCodes.Status200OK)]
    public async Task<ActionResult<List<RobotDto>>> GetAll([FromQuery] Guid? modelId, [FromQuery] Guid? mapId)
    {
        try
        {
            var robots = await _robotService.GetAllAsync(modelId, mapId);
            var dtos = robots.Select(r => MapToDto(r)).ToList();
            return Ok(dtos);
        }
        catch (Exception ex)
        {
            _logger.Error($"Error getting all robots: {ex.Message}");
            return StatusCode(500, new ErrorResponseDto { Error = "An error occurred while retrieving robots." });
        }
    }

    /// <summary>
    /// Get robot by ID
    /// </summary>
    [HttpGet("{id}")]
    [ProducesResponseType(typeof(RobotDto), StatusCodes.Status200OK)]
    [ProducesResponseType(StatusCodes.Status404NotFound)]
    public async Task<ActionResult<RobotDto>> GetById(Guid id)
    {
        try
        {
            var robot = await _robotService.GetByIdAsync(id);
            if (robot == null)
            {
                return NotFound(new ErrorResponseDto { Error = $"Robot with ID {id} not found." });
            }

            return Ok(MapToDto(robot));
        }
        catch (Exception ex)
        {
            _logger.Error($"Error getting robot {id}: {ex.Message}");
            return StatusCode(500, new ErrorResponseDto { Error = "An error occurred while retrieving the robot." });
        }
    }

    /// <summary>
    /// Get robot by RobotId (string identifier)
    /// </summary>
    [HttpGet("robotId/{robotId}")]
    [ProducesResponseType(typeof(RobotDto), StatusCodes.Status200OK)]
    [ProducesResponseType(StatusCodes.Status404NotFound)]
    public async Task<ActionResult<RobotDto>> GetByRobotId(string robotId)
    {
        try
        {
            var robot = await _robotService.GetByRobotIdAsync(robotId);
            if (robot == null)
            {
                return NotFound(new ErrorResponseDto { Error = $"Robot with RobotId '{robotId}' not found." });
            }

            return Ok(MapToDto(robot));
        }
        catch (Exception ex)
        {
            _logger.Error($"Error getting robot with RobotId '{robotId}': {ex.Message}");
            return StatusCode(500, new ErrorResponseDto { Error = "An error occurred while retrieving the robot." });
        }
    }

    /// <summary>
    /// Search robots by query string
    /// </summary>
    [HttpGet("search")]
    [ProducesResponseType(typeof(List<RobotDto>), StatusCodes.Status200OK)]
    public async Task<ActionResult<List<RobotDto>>> Search([FromQuery] string query)
    {
        try
        {
            var robots = await _robotService.SearchAsync(query);
            var dtos = robots.Select(r => MapToDto(r)).ToList();
            return Ok(dtos);
        }
        catch (Exception ex)
        {
            _logger.Error($"Error searching robots with query '{query}': {ex.Message}");
            return StatusCode(500, new ErrorResponseDto { Error = "An error occurred while searching robots." });
        }
    }

    /// <summary>
    /// Get all robots by model ID
    /// </summary>
    [HttpGet("model/{modelId}")]
    [ProducesResponseType(typeof(List<RobotDto>), StatusCodes.Status200OK)]
    public async Task<ActionResult<List<RobotDto>>> GetByModelId(Guid modelId)
    {
        try
        {
            var robots = await _robotService.GetByModelIdAsync(modelId);
            var dtos = robots.Select(r => MapToDto(r)).ToList();
            return Ok(dtos);
        }
        catch (Exception ex)
        {
            _logger.Error($"Error getting robots by model {modelId}: {ex.Message}");
            return StatusCode(500, new ErrorResponseDto { Error = "An error occurred while retrieving robots." });
        }
    }

    /// <summary>
    /// Create a new robot
    /// </summary>
    [HttpPost]
    [ProducesResponseType(typeof(RobotDto), StatusCodes.Status201Created)]
    [ProducesResponseType(StatusCodes.Status400BadRequest)]
    public async Task<ActionResult<RobotDto>> Create([FromBody] CreateRobotRequest request)
    {
        try
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(new ErrorResponseDto
                {
                    Error = "Validation failed",
                    Details = ModelState.ToDictionary(
                        kvp => kvp.Key,
                        kvp => (object)(kvp.Value?.Errors.Select(e => e.ErrorMessage).ToArray() ?? Array.Empty<string>()))
                });
            }

            var robot = await _robotService.CreateAsync(request);
            var dto = MapToDto(robot);
            return CreatedAtAction(nameof(GetById), new { id = robot.Id }, dto);
        }
        catch (InvalidOperationException ex)
        {
            return BadRequest(new ErrorResponseDto { Error = ex.Message });
        }
        catch (KeyNotFoundException ex)
        {
            return BadRequest(new ErrorResponseDto { Error = ex.Message });
        }
        catch (Exception ex)
        {
            _logger.Error($"Error creating robot: {ex.Message}");
            return StatusCode(500, new ErrorResponseDto { Error = "An error occurred while creating the robot." });
        }
    }

    /// <summary>
    /// Update an existing robot
    /// </summary>
    [HttpPut("{id}")]
    [ProducesResponseType(typeof(RobotDto), StatusCodes.Status200OK)]
    [ProducesResponseType(StatusCodes.Status404NotFound)]
    [ProducesResponseType(StatusCodes.Status400BadRequest)]
    public async Task<ActionResult<RobotDto>> Update(Guid id, [FromBody] UpdateRobotRequest request)
    {
        try
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(new ErrorResponseDto
                {
                    Error = "Validation failed",
                    Details = ModelState.ToDictionary(
                        kvp => kvp.Key,
                        kvp => (object)(kvp.Value?.Errors.Select(e => e.ErrorMessage).ToArray() ?? Array.Empty<string>()))
                });
            }

            var robot = await _robotService.UpdateAsync(id, request);
            var dto = MapToDto(robot);
            return Ok(dto);
        }
        catch (KeyNotFoundException ex)
        {
            return NotFound(new ErrorResponseDto { Error = ex.Message });
        }
        catch (InvalidOperationException ex)
        {
            return BadRequest(new ErrorResponseDto { Error = ex.Message });
        }
        catch (Exception ex)
        {
            _logger.Error($"Error updating robot {id}: {ex.Message}");
            return StatusCode(500, new ErrorResponseDto { Error = "An error occurred while updating the robot." });
        }
    }

    /// <summary>
    /// Delete a robot
    /// </summary>
    [HttpDelete("{id}")]
    [ProducesResponseType(StatusCodes.Status204NoContent)]
    [ProducesResponseType(StatusCodes.Status404NotFound)]
    public async Task<IActionResult> Delete(Guid id)
    {
        try
        {
            var deleted = await _robotService.DeleteAsync(id);
            if (!deleted)
            {
                return NotFound(new ErrorResponseDto { Error = $"Robot with ID {id} not found." });
            }

            return NoContent();
        }
        catch (Exception ex)
        {
            _logger.Error($"Error deleting robot {id}: {ex.Message}");
            return StatusCode(500, new ErrorResponseDto { Error = "An error occurred while deleting the robot." });
        }
    }

    private static RobotDto MapToDto(Robot robot)
    {
        return new RobotDto
        {
            Id = robot.Id,
            RobotId = robot.RobotId,
            Name = robot.Name,
            ModelId = robot.ModelId,
            ModelName = robot.Model?.ModelName,
            MapId = robot.MapId,
            CreatedDate = robot.CreatedDate,
            UpdatedDate = robot.UpdatedDate
        };
    }
}