using Microsoft.AspNetCore.Mvc;
using ResourceMonitorService.Models;
using ResourceMonitorService.Services;
using System.Diagnostics;

namespace ResourceMonitorService.Controllers
{
    [ApiController]
    [Route("api/[controller]")]
    public class ResourceController : ControllerBase
    {
        private readonly IResourceMonitorService _resourceMonitorService;
        private readonly ISystemInfoService _systemInfoService;
        private readonly ILogger<ResourceController> _logger;

        public ResourceController(
            IResourceMonitorService resourceMonitorService,
            ISystemInfoService systemInfoService,
            ILogger<ResourceController> logger)
        {
            _resourceMonitorService = resourceMonitorService;
            _systemInfoService = systemInfoService;
            _logger = logger;
        }

        [HttpGet("usage")]
        public async Task<ActionResult<ResourceUsage>> GetResourceUsage()
        {
            try
            {
                var usage = await _resourceMonitorService.GetResourceUsageAsync();
                return Ok(usage);
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error getting resource usage");
                return StatusCode(500, "Internal server error");
            }
        }

        [HttpGet("system-info")]
        public async Task<ActionResult<SystemInfo>> GetSystemInfo()
        {
            try
            {
                var systemInfo = await _systemInfoService.GetSystemInfoAsync();
                return Ok(systemInfo);
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error getting system info");
                return StatusCode(500, "Internal server error");
            }
        }

        [HttpGet("cpu")]
        public async Task<ActionResult<CpuUsage>> GetCpuUsage()
        {
            try
            {
                var cpuUsage = await _resourceMonitorService.GetCpuUsageAsync();
                return Ok(cpuUsage);
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error getting CPU usage");
                return StatusCode(500, "Internal server error");
            }
        }

        [HttpGet("memory")]
        public async Task<ActionResult<MemoryUsage>> GetMemoryUsage()
        {
            try
            {
                var memoryUsage = await _resourceMonitorService.GetMemoryUsageAsync();
                return Ok(memoryUsage);
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error getting memory usage");
                return StatusCode(500, "Internal server error");
            }
        }

        [HttpGet("gpu")]
        public async Task<ActionResult<GpuUsage>> GetGpuUsage()
        {
            try
            {
                var gpuUsage = await _resourceMonitorService.GetGpuUsageAsync();
                return Ok(gpuUsage);
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error getting GPU usage");
                return StatusCode(500, "Internal server error");
            }
        }

        [HttpGet("disks")]
        public async Task<ActionResult<List<DiskUsage>>> GetDiskUsage()
        {
            try
            {
                var diskUsage = await _resourceMonitorService.GetDiskUsageAsync();
                return Ok(diskUsage);
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error getting disk usage");
                return StatusCode(500, "Internal server error");
            }
        }

        [HttpGet("processes")]
        public async Task<ActionResult<List<ProcessInfo>>> GetTopProcesses([FromQuery] int count = 10)
        {
            try
            {
                var processes = await _resourceMonitorService.GetTopProcessesAsync(count);
                return Ok(processes);
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error getting top processes");
                return StatusCode(500, "Internal server error");
            }
        }

        [HttpPost("kill-process/{processId}")]
        public ActionResult KillProcess(int processId)
        {
            try
            {
                var process = Process.GetProcessById(processId);
                if (process == null)
                {
                    return NotFound($"Process with ID {processId} not found");
                }

                process.Kill();
                _logger.LogInformation($"Process {process.ProcessName} (ID: {processId}) was terminated");
                
                return Ok(new { message = $"Process {process.ProcessName} (ID: {processId}) was terminated successfully" });
            }
            catch (ArgumentException)
            {
                return NotFound($"Process with ID {processId} not found");
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, $"Error killing process {processId}");
                return StatusCode(500, "Internal server error");
            }
        }
    }
}