import { useState, useEffect } from "react";
import { useParams, useNavigate } from "react-router";
import { Masthead } from "../components/Masthead";
import { DirectiveList } from "../components/directives/DirectiveList";
import { DirectiveDetail } from "../components/directives/DirectiveDetail";
import { useDirectives, useDirective } from "../hooks/useDirectives";
import { useAuth } from "../contexts/AuthContext";

export default function DirectivesPage() {
  const { isAuthenticated, isAuthConfigured, isLoading: authLoading } = useAuth();
  const navigate = useNavigate();
  const { id: selectedId } = useParams<{ id: string }>();
  const { directives, loading: listLoading, create, remove } = useDirectives();
  const { directive, refresh: refreshDetail, start, pause, advance, completeStep, failStep, skipStep, updateGoal } = useDirective(selectedId);

  const [showCreate, setShowCreate] = useState(false);
  const [newTitle, setNewTitle] = useState("");
  const [newGoal, setNewGoal] = useState("");
  const [newRepoUrl, setNewRepoUrl] = useState("");

  useEffect(() => {
    if (!authLoading && isAuthConfigured && !isAuthenticated) {
      navigate("/login");
    }
  }, [authLoading, isAuthConfigured, isAuthenticated, navigate]);

  if (authLoading) {
    return (
      <div className="relative z-10 min-h-screen flex flex-col bg-[#0a1628]">
        <Masthead showNav />
        <main className="flex-1 flex items-center justify-center">
          <p className="text-[#7788aa] font-mono text-sm">Loading...</p>
        </main>
      </div>
    );
  }

  const handleCreate = async () => {
    if (!newTitle.trim() || !newGoal.trim()) return;
    try {
      const d = await create({
        title: newTitle.trim(),
        goal: newGoal.trim(),
        repositoryUrl: newRepoUrl.trim() || undefined,
      });
      setShowCreate(false);
      setNewTitle("");
      setNewGoal("");
      setNewRepoUrl("");
      navigate(`/directives/${d.id}`);
    } catch (e) {
      console.error("Failed to create directive:", e);
    }
  };

  const handleDelete = async () => {
    if (!selectedId) return;
    if (!window.confirm("Delete this directive?")) return;
    try {
      await remove(selectedId);
      navigate("/directives");
    } catch (e) {
      console.error("Failed to delete:", e);
    }
  };

  return (
    <div className="relative z-10 min-h-screen flex flex-col bg-[#0a1628]">
      <Masthead showNav />
      <main className="flex-1 flex overflow-hidden" style={{ height: "calc(100vh - 80px)" }}>
        {/* Left: List */}
        <div className="w-[280px] shrink-0 border-r border-dashed border-[rgba(117,170,252,0.2)] overflow-hidden flex flex-col">
          <DirectiveList
            directives={directives}
            selectedId={selectedId ?? null}
            onSelect={(id) => navigate(`/directives/${id}`)}
            onCreate={() => setShowCreate(true)}
          />
        </div>

        {/* Right: Detail or Create */}
        <div className="flex-1 overflow-hidden">
          {showCreate ? (
            <div className="p-4 max-w-lg">
              <h2 className="text-[14px] font-mono text-white font-medium mb-4">
                New Directive
              </h2>
              <div className="flex flex-col gap-3">
                <div>
                  <label className="text-[10px] font-mono text-[#9bc3ff] uppercase tracking-wide block mb-1">
                    Title
                  </label>
                  <input
                    value={newTitle}
                    onChange={(e) => setNewTitle(e.target.value)}
                    placeholder="Project title..."
                    className="w-full bg-[#0a1628] border border-[rgba(117,170,252,0.2)] rounded px-2 py-1.5 text-[12px] font-mono text-white"
                  />
                </div>
                <div>
                  <label className="text-[10px] font-mono text-[#9bc3ff] uppercase tracking-wide block mb-1">
                    Goal
                  </label>
                  <textarea
                    value={newGoal}
                    onChange={(e) => setNewGoal(e.target.value)}
                    placeholder="What should this directive accomplish?"
                    rows={4}
                    className="w-full bg-[#0a1628] border border-[rgba(117,170,252,0.2)] rounded px-2 py-1.5 text-[12px] font-mono text-white resize-y"
                  />
                </div>
                <div>
                  <label className="text-[10px] font-mono text-[#9bc3ff] uppercase tracking-wide block mb-1">
                    Repository URL (optional)
                  </label>
                  <input
                    value={newRepoUrl}
                    onChange={(e) => setNewRepoUrl(e.target.value)}
                    placeholder="https://github.com/..."
                    className="w-full bg-[#0a1628] border border-[rgba(117,170,252,0.2)] rounded px-2 py-1.5 text-[12px] font-mono text-white"
                  />
                </div>
                <div className="flex gap-2">
                  <button
                    type="button"
                    onClick={handleCreate}
                    disabled={!newTitle.trim() || !newGoal.trim()}
                    className="text-[11px] font-mono text-emerald-400 hover:text-emerald-300 border border-emerald-800 rounded px-3 py-1 disabled:opacity-50"
                  >
                    Create
                  </button>
                  <button
                    type="button"
                    onClick={() => setShowCreate(false)}
                    className="text-[11px] font-mono text-[#7788aa] hover:text-white border border-[#2a3a5a] rounded px-3 py-1"
                  >
                    Cancel
                  </button>
                </div>
              </div>
            </div>
          ) : selectedId && directive ? (
            <DirectiveDetail
              directive={directive}
              onStart={start}
              onPause={pause}
              onAdvance={advance}
              onCompleteStep={completeStep}
              onFailStep={failStep}
              onSkipStep={skipStep}
              onUpdateGoal={updateGoal}
              onDelete={handleDelete}
              onRefresh={refreshDetail}
            />
          ) : (
            <div className="flex-1 flex items-center justify-center h-full">
              <p className="text-[#556677] font-mono text-[12px]">
                {listLoading
                  ? "Loading..."
                  : "Select a directive or create a new one"}
              </p>
            </div>
          )}
        </div>
      </main>
    </div>
  );
}