using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using EventsAppQuest.Web.Application;
using EventsAppQuest.Web.Domain;
using EventsAppQuest.Web.Producer.Application;

namespace EventsAppQuest.Web.Presentation
{
    /// <summary>
    /// Painel final de encerramento do ciclo: status global, resumo, principal bloqueio, principal progresso, recomendação e nota de gestão.
    /// </summary>
    public class EventCycleClosurePanel : MonoBehaviour, IWebContentRoot
    {
        private Transform _content;

        public void SetContentRoot(Transform contentRoot) => _content = contentRoot;

        private void Start()
        {
            Refresh();
            WebRuntimeContext.OnDataChanged += Refresh;
        }

        private void OnDestroy() => WebRuntimeContext.OnDataChanged -= Refresh;

        public void Refresh()
        {
            if (_content == null) return;
            ClearContent(_content);
            var data = WebRuntimeContext.DataService;
            if (data == null) return;
            var font = Resources.GetBuiltinResource<Font>("LegacyRuntime.ttf");

            var orders = HandoffStore.GetOrders();
            var opportunities = data.GetOpportunities();
            var proposals = data.GetProposals();
            var sessions = data.GetSessions();
            var followUps = data.GetFollowUpTasks();
            var closures = EventCycleClosureController.EvaluateClosure(orders, opportunities, proposals, sessions, followUps);

            var titleRow = new GameObject("TitleRow");
            titleRow.transform.SetParent(_content, false);
            titleRow.AddComponent<RectTransform>().sizeDelta = new Vector2(0, 26);
            var titleText = titleRow.AddComponent<Text>();
            titleText.text = "Painel final de encerramento do ciclo (estado global)";
            titleText.font = font;
            titleText.fontSize = 16;
            titleText.fontStyle = FontStyle.Bold;

            var btnRow = new GameObject("BtnRow");
            btnRow.transform.SetParent(_content, false);
            btnRow.AddComponent<RectTransform>().sizeDelta = new Vector2(0, 24);
            var hLayout = btnRow.AddComponent<HorizontalLayoutGroup>();
            hLayout.spacing = 6;
            hLayout.childForceExpandWidth = false;
            CreateSmallButton(btnRow.transform, "Atualizar", font, 70, Refresh);

            if (closures == null || closures.Count == 0)
            {
                var empty = new GameObject("Empty");
                empty.transform.SetParent(_content, false);
                var emptyText = empty.AddComponent<Text>();
                emptyText.font = font;
                emptyText.fontSize = 11;
                emptyText.text = "Nenhum ciclo com pedido. Gere um pedido para ver o estado de encerramento.";
                empty.GetComponent<RectTransform>().sizeDelta = new Vector2(0, 18);
                return;
            }

            foreach (var c in closures)
            {
                var block = new GameObject("Closure_" + c.CycleId);
                block.transform.SetParent(_content, false);
                var layout = block.AddComponent<VerticalLayoutGroup>();
                layout.spacing = 4;
                layout.childForceExpandHeight = false;
                layout.childForceExpandWidth = true;

                var header = new GameObject("Header");
                header.transform.SetParent(block.transform, false);
                var headerText = header.AddComponent<Text>();
                headerText.font = font;
                headerText.fontSize = 14;
                headerText.fontStyle = FontStyle.Bold;
                var statusLabel = c.ClosureStatus ?? "—";
                var healthLabel = c.IsCycleHealthy ? " (saudável)" : (c.IsCycleBlocked ? " (bloqueado)" : (c.IsCycleAtRisk ? " (em risco)" : ""));
                headerText.text = $"Ciclo {c.CycleId} | Status global: {statusLabel}{healthLabel} | Avaliado: {(c.EvaluatedAt?.ToString("yyyy-MM-dd HH:mm") ?? "—")}";
                if (c.IsCycleBlocked) headerText.color = new Color(0.75f, 0.2f, 0.2f);
                else if (c.IsCycleAtRisk) headerText.color = new Color(0.7f, 0.4f, 0f);
                else if (c.IsCycleCompleted) headerText.color = new Color(0.2f, 0.5f, 0.2f);
                header.GetComponent<RectTransform>().sizeDelta = new Vector2(0, 20);

                AddBlock(block.transform, font, "Resumo encerramento", c.ClosureSummary);
                AddBlock(block.transform, font, "Principal bloqueio/risco", c.MainBlockingReason);
                AddBlock(block.transform, font, "Principal progresso", c.MainProgressReason);
                AddBlock(block.transform, font, "Recomendação final", c.ClosingRecommendation);
                if (!string.IsNullOrEmpty(c.FinalManagementNote))
                    AddBlock(block.transform, font, "Nota de gestão", c.FinalManagementNote);
            }
        }

        private static void AddBlock(Transform parent, Font font, string title, string content)
        {
            var go = new GameObject("Block_" + title);
            go.transform.SetParent(parent, false);
            var text = go.AddComponent<Text>();
            text.font = font;
            text.fontSize = 10;
            text.text = title + ": " + (content ?? "—");
            go.GetComponent<RectTransform>().sizeDelta = new Vector2(0, 14);
        }

        private static void CreateSmallButton(Transform parent, string text, Font font, float width, System.Action onClick)
        {
            var go = new GameObject("Btn_" + text);
            go.transform.SetParent(parent, false);
            var rt = go.AddComponent<RectTransform>();
            rt.sizeDelta = new Vector2(width, 22);
            var le = go.AddComponent<LayoutElement>();
            le.preferredWidth = width;
            le.preferredHeight = 22;
            var img = go.AddComponent<Image>();
            img.color = new Color(0.4f, 0.7f, 0.5f);
            var btn = go.AddComponent<Button>();
            btn.targetGraphic = img;
            btn.onClick.AddListener(() => onClick?.Invoke());
            var tGo = new GameObject("Text");
            tGo.transform.SetParent(go.transform, false);
            var tRt = tGo.AddComponent<RectTransform>();
            tRt.anchorMin = Vector2.zero;
            tRt.anchorMax = Vector2.one;
            tRt.offsetMin = Vector2.zero;
            tRt.offsetMax = Vector2.zero;
            var t = tGo.AddComponent<Text>();
            t.text = text;
            t.font = font;
            t.fontSize = 9;
            t.alignment = TextAnchor.MiddleCenter;
        }

        private static void ClearContent(Transform content)
        {
            for (var i = content.childCount - 1; i >= 0; i--)
                Destroy(content.GetChild(i).gameObject);
        }
    }
}
