using System;
using System.Collections;
using System.Linq;
using Luneraria.Core;
using Luneraria.View;
using NUnit.Framework;
using UnityEngine;
using UnityEngine.TestTools;

namespace Luneraria.UI.Tests
{
    /// <summary>
    /// U5.5 pilot pictures of one figure in the real game (the Meshy Kohlenbeißer against the
    /// Phase-4 model it replaces): the human seat plays the Glutpakt, buys the starter army and
    /// four Kohlenbeißer (g01) in round 3, and the camera shows them in the planning formation,
    /// in the HUD portrait and in the fight on the own lane, close (zoom 12) and at the benchmark's
    /// lane distance (zoom 22). Like HudViewsTests, commands go straight to the match followed by
    /// the preview rebuild. A capture tool, not part of the suite:
    /// -testFilter "Luneraria.UI.Tests.FigureViewsTests"; LUNE_EVIDENCE names the folder below
    /// docs/port/screenshots (default u5.5/spiel). LUNE_FIGURE names another Glutpakt troop
    /// (default g01); an upgraded troop (g02) is bought as its base and upgraded.
    /// </summary>
    [Explicit("Bildwerkzeug: nur gezielt per -testFilter")]
    public sealed class FigureViewsTests
    {
        /// <summary>The human seat 1 plays the Glutpakt, as do the bots of seats 2 and 5.</summary>
        static readonly string[] Bunds = { "wurzelbund", "glutpakt", "glutpakt", "wurzelbund", "wurzelbund", "glutpakt" };

        string _folder;

        IEnumerator Shot(HudSession s, string label)
        {
            yield return s.Shot(_folder + label + ".png");
        }

        static void Send(HudSession s, Command command)
        {
            CommandResult result = s.Match.Submit(HudSession.Human, command);
            Assert.IsTrue(result.Ok, command.Type + ": " + result.Message);
            s.Game.RebuildPreview();
            s.Sync();
        }

        /// <summary>The own Kohlenbeißer on the field: the one nearest to the enemy (the front of the fight).</summary>
        static LuneUnit Front(HudSession s, string figure)
        {
            int team = s.Me.Team;
            return s.Match.Combat.Units.Where(u => u.Alive && u.Team == team && u.Def.Id == figure)
                .OrderByDescending(u => u.Progress).FirstOrDefault();
        }

        [UnityTest, Timeout(900000)]
        public IEnumerator Kohlenbeisser()
        {
            string evidence = Environment.GetEnvironmentVariable("LUNE_EVIDENCE");
            _folder = "docs/port/screenshots/" + (string.IsNullOrEmpty(evidence) ? "u5.5/spiel" : evidence) + "/";
            string figure = Environment.GetEnvironmentVariable("LUNE_FIGURE");
            if (string.IsNullOrEmpty(figure))
                figure = "g01";
            bool upgrade = figure != "g01";
            var s = new HudSession();
            yield return s.Open(1920, 1080, seed: 4, bunds: Bunds);
            s.Match.RoundNumber = 3;
            s.Me.Draft.Gold = upgrade ? 2000 : 900;
            yield return s.Starter();
            s.Leave();
            for (int i = 0; i < 4; i++)
                Send(s, Command.Buy("g01", s.Me.Lane));
            if (upgrade)
            {
                foreach (RosterEntry entry in s.Me.Draft.Roster.Where(e => e.TypeId == "g01").ToList())
                    Send(s, Command.Upgrade(entry.Uid));
            }
            yield return new WaitForSecondsRealtime(.4f);
            RosterEntry first = s.Me.Draft.Roster.First(e => e.TypeId == figure);
            // The planning preview stands the army in its formation on the own lane.
            LuneUnit waiting = s.View.Preview?.Units.FirstOrDefault(u => u.Team == s.Me.Team && u.Def.Id == figure);
            Assert.IsNotNull(waiting, "Kohlenbeißer in the planning preview");
            s.Rig.LookAt(waiting.Position, 12f, true);
            yield return new WaitForSecondsRealtime(.5f);
            yield return Shot(s, "01-aufstellung-nah");
            s.Hud.SelectUnit(first.Uid);
            yield return new WaitForSecondsRealtime(.4f);
            yield return Shot(s, "02-portraet");
            s.Hud.ClearSelection();
            s.Game.Key(KeyCode.Space);
            yield return HudSession.Frames(1);
            Assert.AreEqual(LuneMatchRunner.Stage.Combat, s.Runner.Current, "combat of round 3");
            yield return s.Fight(7.0);
            s.Driver.Paused = true;
            LuneUnit front = Front(s, figure);
            Assert.IsNotNull(front, "a Kohlenbeißer on the field");
            s.Rig.LookAt(front.Position, 12f, true);
            yield return new WaitForSecondsRealtime(.5f);
            yield return Shot(s, "03-kampf-nah");
            s.Rig.LookAt(front.Position, 22f, true);
            yield return new WaitForSecondsRealtime(.5f);
            yield return Shot(s, "04-kampf-lane");
            s.Close();
        }
    }
}