using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;

using PrivaPub.ClientModels;
using PrivaPub.Domain.Statistics;
using PrivaPub.Infrastructure.Jobs;
using PrivaPub.Infrastructure.Statistics;
using PrivaPub.Models.Jobs;

using System.Globalization;

namespace PrivaPub.Controllers.ClientToServer
{
	[ApiController,
		Route("clientapi/admin/statistics"),
		Authorize(Policy = Policies.IsAdmin)]
	public class StatisticsController : ControllerBase
	{
		readonly StatisticsQueries _queries;
		readonly IJobQueue _queue;
		readonly Microsoft.Extensions.Options.IOptionsMonitor<StatisticsOptions> _options;

		public StatisticsController(StatisticsQueries queries, IJobQueue queue, Microsoft.Extensions.Options.IOptionsMonitor<StatisticsOptions> options)
		{
			_queries = queries;
			_queue = queue;
			_options = options;
		}

		[HttpGet, Route("/clientapi/admin/statistics/crawler")]
		public async Task<IActionResult> Crawler(CancellationToken token) =>
			Ok(await _queries.Crawler(_options.CurrentValue.Crawler.Enabled, _options.CurrentValue.Crawler.RevisitDays, token));

		[HttpGet, Route("/clientapi/admin/statistics/overview")]
		public async Task<IActionResult> Overview([FromQuery] int days = 30, CancellationToken token = default) =>
			Ok(await _queries.Overview(days, token));

		[HttpGet, Route("/clientapi/admin/statistics/hosts")]
		public async Task<IActionResult> Hosts([FromQuery] int days = 30, [FromQuery] string sort = default, [FromQuery] string software = default,
			[FromQuery] int page = 1, [FromQuery] int limit = 50, CancellationToken token = default) =>
			Ok(await _queries.Hosts(days, sort, software, page, limit, token));

		[HttpGet, Route("/clientapi/admin/statistics/hosts/{host}")]
		public async Task<IActionResult> Host(string host, [FromQuery] int days = 90, CancellationToken token = default) =>
			await _queries.Host(host, days, token) is { } found ? Ok(found) : NotFound();

		[HttpGet, Route("/clientapi/admin/statistics/events")]
		public async Task<IActionResult> Events([FromQuery] string host = default, [FromQuery] string channel = default, [FromQuery] string outcome = default,
			[FromQuery] string reason = default, [FromQuery] DateTime? before = default, [FromQuery] int limit = 100, CancellationToken token = default) =>
			Ok(await _queries.Events(host, channel, outcome, reason, before, limit, token));

		[HttpGet, Route("/clientapi/admin/statistics/server")]
		public async Task<IActionResult> Server([FromQuery] int days = 30, CancellationToken token = default) =>
			Ok(await _queries.Server(days, token));

		[HttpPost, Route("/clientapi/admin/statistics/rollups/{day}")]
		public async Task<IActionResult> Rollup(string day, CancellationToken token)
		{
			if (!DateTime.TryParseExact(day, "yyyy-MM-dd", CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out var parsed)
				|| parsed.Date >= DateTime.UtcNow.Date)
				return BadRequest();
			var job = RollupJob.For(parsed.Date, $"rollup|{day}|rerun|{DateTime.UtcNow.Ticks}");
			job.RunAt = DateTime.UtcNow;
			await _queue.EnqueueMany(new[] { job }, token);
			return Accepted();
		}

		[HttpPost, Route("/clientapi/admin/statistics/hosts/{host}/describe")]
		public async Task<IActionResult> Describe(string host, CancellationToken token)
		{
			host = Interactions.Host(host);
			if (host == Interactions.Unknown)
				return BadRequest();
			await _queue.Enqueue(JobKind.DescribeInstance, host, host, $"describe|{host}|admin|{DateTime.UtcNow.Ticks}", token);
			return Accepted();
		}
	}
}