"use client";

import { useState, useEffect } from "react";
import { useParams, useRouter } from "next/navigation";
import Link from "next/link";

interface ProjectData {
  id: string;
  name: string;
  description: string;
  status: string;
  progress: number;
  createdAt: string;
  updatedAt: string;
  sections: Section[];
  agents: Agent[];
  tasks: Task[];
}

interface Section {
  id: string;
  type: string;
  status: string;
  progress?: number;
  assets?: Asset[];
}

interface Agent {
  id: string;
  name: string;
  type: string;
  status: string;
  provider: string;
  currentTask?: string;
  progress?: number;
}

interface Task {
  id: string;
  title: string;
  description?: string;
  status: string;
  priority: string;
  assignedTo?: string;
  createdAt: string;
  completedAt?: string;
}

interface Asset {
  id: string;
  name: string;
  type: string;
  url: string;
  createdAt: string;
}

export default function ProjectDetailPage() {
  const params = useParams();
  const router = useRouter();
  const projectId = params.id as string;

  const [project, setProject] = useState<ProjectData | null>(null);
  const [loading, setLoading] = useState(true);
  const [selectedTab, setSelectedTab] = useState<"overview" | "sections" | "tasks">("overview");
  const [agentWorking, setAgentWorking] = useState<string | null>(null);

  useEffect(() => {
    fetchProject();
  }, [projectId]);

  const fetchProject = async () => {
    try {
      const res = await fetch(`/api/projects/${projectId}`);
      if (res.ok) {
        const data = await res.json();
        setProject(data.project);
      } else {
        console.error("Failed to fetch project");
      }
    } catch (error) {
      console.error("Error fetching project:", error);
    } finally {
      setLoading(false);
    }
  };

  const handleTriggerAgent = async (agentId: string) => {
    setAgentWorking(agentId);
    // TODO: Implement actual agent trigger logic
    setTimeout(() => {
      setAgentWorking(null);
      fetchProject();
    }, 2000);
  };

  const getStatusColor = (status: string) => {
    const colors: Record<string, string> = {
      PENDING: "bg-gray-500",
      "IN_PROGRESS": "bg-blue-500",
      COMPLETED: "bg-green-500",
      BLOCKED: "bg-red-500",
      planning: "bg-gray-500",
      designing: "bg-purple-500",
      developing: "bg-blue-500",
      testing: "bg-yellow-500",
      deploying: "bg-orange-500",
      deployed: "bg-green-500",
    };
    return colors[status] || "bg-gray-500";
  };

  const getAgentStatusColor = (status: string) => {
    const colors: Record<string, string> = {
      IDLE: "bg-gray-500",
      WORKING: "bg-vylo-primary",
      COMPLETED: "bg-vylo-success",
      ERROR: "bg-vylo-error",
    };
    return colors[status] || "bg-gray-500";
  };

  const getSectionIcon = (type: string) => {
    const icons: Record<string, string> = {
      LOGO: "🎨",
      ICONS: "✨",
      GRAPHICS: "🖼️",
      MARKETING: "📢",
      WIREFRAME: "📐",
      CODE: "💻",
      TESTING: "🧪",
      DEPLOYMENT: "🚀",
    };
    return icons[type] || "📦";
  };

  const getAgentIcon = (type: string) => {
    const icons: Record<string, string> = {
      CODE: "💻",
      DESIGN: "🎨",
      MARKETING: "📝",
      TESTING: "🧪",
      DEPLOYMENT: "🚀",
    };
    return icons[type] || "🤖";
  };

  const getPriorityColor = (priority: string) => {
    const colors: Record<string, string> = {
      low: "text-gray-400",
      medium: "text-yellow-400",
      high: "text-orange-400",
      urgent: "text-red-400",
    };
    return colors[priority] || "text-gray-400";
  };

  if (loading) {
    return (
      <div className="min-h-screen bg-gradient-to-br from-vylo-darker via-vylo-dark to-vylo-darker flex items-center justify-center">
        <div className="text-center">
          <div className="w-16 h-16 border-4 border-vylo-accent border-t-vylo-primary rounded-full animate-spin mx-auto mb-4"></div>
          <p className="text-gray-400">Loading project...</p>
        </div>
      </div>
    );
  }

  if (!project) {
    return (
      <div className="min-h-screen bg-gradient-to-br from-vylo-darker via-vylo-dark to-vylo-darker flex items-center justify-center">
        <div className="text-center">
          <h2 className="text-2xl font-bold mb-4">Project Not Found</h2>
          <Link href="/dashboard" className="vylo-button">
            Back to Dashboard
          </Link>
        </div>
      </div>
    );
  }

  return (
    <div className="min-h-screen bg-gradient-to-br from-vylo-darker via-vylo-dark to-vylo-darker">
      {/* Header */}
      <header className="border-b border-vylo-accent/20 bg-vylo-dark/50 backdrop-blur-xl sticky top-0 z-50">
        <div className="container mx-auto px-6 py-4">
          <div className="flex justify-between items-center">
            <Link href="/dashboard" className="flex items-center gap-3">
              <div className="w-10 h-10 rounded-full bg-gradient-to-br from-vylo-accent to-vylo-primary vylo-glow"></div>
              <h1 className="text-2xl font-black vylo-text-gradient">VYLO</h1>
            </Link>

            <nav className="flex items-center gap-6">
              <Link href="/dashboard" className="text-gray-400 hover:text-white transition">
                Dashboard
              </Link>
              <button className="vylo-button text-sm">
                Save Changes
              </button>
            </nav>
          </div>
        </div>
      </header>

      <div className="container mx-auto px-6 py-8">
        {/* Project Header */}
        <div className="mb-8">
          <div className="flex justify-between items-start mb-4">
            <div>
              <div className="flex items-center gap-3 mb-2">
                <h2 className="text-4xl font-black">{project.name}</h2>
                <span className={`px-3 py-1 rounded-full text-xs font-semibold ${getStatusColor(project.status)}`}>
                  {project.status}
                </span>
              </div>
              <p className="text-gray-400 text-lg">{project.description}</p>
            </div>
            <div className="flex gap-3">
              <button className="px-4 py-2 bg-vylo-dark border border-vylo-accent/30 hover:border-vylo-primary rounded-lg transition-all">
                Settings
              </button>
              <button className="px-4 py-2 bg-vylo-dark border border-vylo-accent/30 hover:border-vylo-primary rounded-lg transition-all">
                Export
              </button>
            </div>
          </div>

          {/* Progress Bar */}
          <div className="vylo-card">
            <div className="flex justify-between text-sm mb-2">
              <span className="font-semibold">Overall Progress</span>
              <span className="text-vylo-primary font-bold">{project.progress}%</span>
            </div>
            <div className="h-3 bg-vylo-darker rounded-full overflow-hidden">
              <div
                className="h-full bg-gradient-to-r from-vylo-accent via-vylo-primary to-vylo-secondary transition-all duration-500 animate-gradient"
                style={{ width: `${project.progress}%` }}
              ></div>
            </div>
            <div className="flex gap-6 mt-4 text-sm">
              <div className="flex items-center gap-2">
                <span className="text-vylo-success">●</span>
                <span className="text-gray-400">{project.agents?.filter(a => a.status === "WORKING").length || 0} agents active</span>
              </div>
              <div className="flex items-center gap-2">
                <span className="text-vylo-warning">●</span>
                <span className="text-gray-400">{project.tasks?.filter(t => t.status === "todo" || t.status === "in-progress").length || 0} tasks pending</span>
              </div>
              <div className="flex items-center gap-2">
                <span className="text-vylo-primary">●</span>
                <span className="text-gray-400">{project.sections?.filter(s => s.status === "COMPLETED").length || 0}/{project.sections?.length || 0} sections done</span>
              </div>
            </div>
          </div>
        </div>

        {/* Tabs */}
        <div className="flex gap-4 mb-6 border-b border-vylo-accent/20">
          <button
            onClick={() => setSelectedTab("overview")}
            className={`px-6 py-3 font-semibold transition-all ${
              selectedTab === "overview"
                ? "text-vylo-primary border-b-2 border-vylo-primary"
                : "text-gray-400 hover:text-white"
            }`}
          >
            Overview
          </button>
          <button
            onClick={() => setSelectedTab("sections")}
            className={`px-6 py-3 font-semibold transition-all ${
              selectedTab === "sections"
                ? "text-vylo-primary border-b-2 border-vylo-primary"
                : "text-gray-400 hover:text-white"
            }`}
          >
            Sections
          </button>
          <button
            onClick={() => setSelectedTab("tasks")}
            className={`px-6 py-3 font-semibold transition-all ${
              selectedTab === "tasks"
                ? "text-vylo-primary border-b-2 border-vylo-primary"
                : "text-gray-400 hover:text-white"
            }`}
          >
            Tasks
          </button>
        </div>

        {/* Content */}
        <div className="grid grid-cols-1 lg:grid-cols-3 gap-8">
          {/* Main Content */}
          <div className="lg:col-span-2 space-y-6">
            {selectedTab === "overview" && (
              <>
                {/* Quick Actions */}
                <div className="vylo-card">
                  <h3 className="text-xl font-bold mb-4">Quick Actions</h3>
                  <div className="grid grid-cols-2 md:grid-cols-4 gap-3">
                    <button className="vylo-button flex flex-col items-center gap-2 py-4">
                      <span className="text-2xl">➕</span>
                      <span className="text-sm">Add Task</span>
                    </button>
                    <Link
                      href={`/dashboard/projects/${projectId}/logo-generator`}
                      className="bg-gradient-to-br from-vylo-accent to-vylo-primary hover:scale-105 rounded-lg transition-all flex flex-col items-center gap-2 py-4 vylo-glow"
                    >
                      <span className="text-2xl">🎨</span>
                      <span className="text-sm font-semibold">Logo Generator</span>
                    </Link>
                    <button className="bg-vylo-dark border border-vylo-accent/30 hover:border-vylo-primary rounded-lg transition-all flex flex-col items-center gap-2 py-4">
                      <span className="text-2xl">📊</span>
                      <span className="text-sm">Analytics</span>
                    </button>
                    <button className="bg-vylo-dark border border-vylo-accent/30 hover:border-vylo-primary rounded-lg transition-all flex flex-col items-center gap-2 py-4">
                      <span className="text-2xl">🚀</span>
                      <span className="text-sm">Deploy</span>
                    </button>
                  </div>
                </div>

                {/* AI Agents Overview */}
                <div className="vylo-card">
                  <h3 className="text-xl font-bold mb-4">AI Agents Working</h3>
                  <div className="space-y-4">
                    {project.agents?.map((agent) => (
                      <div key={agent.id} className="bg-vylo-darker/50 border border-vylo-accent/10 rounded-lg p-4">
                        <div className="flex items-center gap-4">
                          <div className={`w-12 h-12 rounded-full ${getAgentStatusColor(agent.status)} vylo-glow flex items-center justify-center text-2xl`}>
                            {getAgentIcon(agent.type)}
                          </div>
                          <div className="flex-1">
                            <div className="flex justify-between items-start mb-2">
                              <div>
                                <h4 className="font-semibold">{agent.name}</h4>
                                <p className="text-xs text-gray-500">{agent.provider} • {agent.type}</p>
                              </div>
                              <span className={`w-2 h-2 rounded-full ${getAgentStatusColor(agent.status)} ${agent.status === "WORKING" ? "animate-pulse" : ""}`}></span>
                            </div>
                            {agent.currentTask && (
                              <p className="text-sm text-gray-400 mb-2">{agent.currentTask}</p>
                            )}
                            {agent.status === "WORKING" && agent.progress !== undefined && (
                              <div className="h-1.5 bg-vylo-darker rounded-full overflow-hidden">
                                <div
                                  className="h-full bg-vylo-primary transition-all duration-300"
                                  style={{ width: `${agent.progress}%` }}
                                ></div>
                              </div>
                            )}
                          </div>
                          <button
                            onClick={() => handleTriggerAgent(agent.id)}
                            disabled={agentWorking === agent.id || agent.status === "WORKING"}
                            className="px-4 py-2 bg-gradient-to-r from-vylo-accent to-vylo-primary text-white rounded-lg hover:scale-105 transition-all disabled:opacity-50 disabled:cursor-not-allowed text-sm font-semibold"
                          >
                            {agentWorking === agent.id ? "Triggering..." : agent.status === "WORKING" ? "Working" : "Trigger"}
                          </button>
                        </div>
                      </div>
                    ))}
                  </div>
                </div>

                {/* Recent Activity */}
                <div className="vylo-card">
                  <h3 className="text-xl font-bold mb-4">Recent Activity</h3>
                  <div className="space-y-3">
                    {project.tasks?.slice(0, 5).map((task) => (
                      <div key={task.id} className="flex items-center gap-3 text-sm">
                        <div className={`w-2 h-2 rounded-full ${task.status === "done" ? "bg-vylo-success" : task.status === "in-progress" ? "bg-vylo-primary" : "bg-gray-500"}`}></div>
                        <span className="flex-1 text-gray-300">{task.title}</span>
                        <span className="text-gray-500 text-xs">{new Date(task.createdAt).toLocaleDateString()}</span>
                      </div>
                    ))}
                  </div>
                </div>
              </>
            )}

            {selectedTab === "sections" && (
              <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
                {project.sections?.map((section) => (
                  <div key={section.id} className="vylo-card hover:scale-[1.02] cursor-pointer">
                    <div className="flex items-start gap-3 mb-3">
                      <div className="text-3xl">{getSectionIcon(section.type)}</div>
                      <div className="flex-1">
                        <div className="flex justify-between items-start mb-2">
                          <h4 className="font-bold capitalize">{section.type.toLowerCase()}</h4>
                          <span className={`px-2 py-1 rounded text-xs font-semibold ${getStatusColor(section.status)}`}>
                            {section.status}
                          </span>
                        </div>
                        {section.progress !== undefined && section.progress > 0 && (
                          <>
                            <div className="h-1.5 bg-vylo-darker rounded-full overflow-hidden mb-2">
                              <div
                                className="h-full bg-gradient-to-r from-vylo-accent to-vylo-primary transition-all"
                                style={{ width: `${section.progress}%` }}
                              ></div>
                            </div>
                            <p className="text-xs text-gray-500">{section.progress}% complete</p>
                          </>
                        )}
                        {section.assets && section.assets.length > 0 && (
                          <p className="text-xs text-gray-400 mt-2">{section.assets.length} assets</p>
                        )}
                      </div>
                    </div>
                  </div>
                ))}
              </div>
            )}

            {selectedTab === "tasks" && (
              <div className="space-y-3">
                {project.tasks?.map((task) => (
                  <div key={task.id} className="vylo-card">
                    <div className="flex items-start gap-4">
                      <input
                        type="checkbox"
                        checked={task.status === "done"}
                        className="mt-1 w-5 h-5 rounded border-vylo-accent/30"
                        readOnly
                      />
                      <div className="flex-1">
                        <div className="flex justify-between items-start mb-2">
                          <h4 className={`font-semibold ${task.status === "done" ? "line-through text-gray-500" : ""}`}>
                            {task.title}
                          </h4>
                          <span className={`px-2 py-1 rounded text-xs font-semibold ${getPriorityColor(task.priority)}`}>
                            {task.priority}
                          </span>
                        </div>
                        {task.description && (
                          <p className="text-sm text-gray-400 mb-2">{task.description}</p>
                        )}
                        <div className="flex gap-4 text-xs text-gray-500">
                          <span>Status: {task.status}</span>
                          <span>Created: {new Date(task.createdAt).toLocaleDateString()}</span>
                          {task.completedAt && (
                            <span>Completed: {new Date(task.completedAt).toLocaleDateString()}</span>
                          )}
                        </div>
                      </div>
                    </div>
                  </div>
                ))}
                {(!project.tasks || project.tasks.length === 0) && (
                  <div className="vylo-card text-center py-12">
                    <p className="text-gray-400">No tasks yet. Create your first task!</p>
                    <button className="vylo-button mt-4">Add Task</button>
                  </div>
                )}
              </div>
            )}
          </div>

          {/* Sidebar */}
          <div className="space-y-6">
            {/* Project Stats */}
            <div className="vylo-card">
              <h4 className="font-semibold mb-4">Project Stats</h4>
              <div className="space-y-3">
                <div className="flex justify-between">
                  <span className="text-gray-400 text-sm">Total Tasks</span>
                  <span className="font-semibold">{project.tasks?.length || 0}</span>
                </div>
                <div className="flex justify-between">
                  <span className="text-gray-400 text-sm">Completed</span>
                  <span className="font-semibold text-vylo-success">
                    {project.tasks?.filter(t => t.status === "done").length || 0}
                  </span>
                </div>
                <div className="flex justify-between">
                  <span className="text-gray-400 text-sm">In Progress</span>
                  <span className="font-semibold text-vylo-primary">
                    {project.tasks?.filter(t => t.status === "in-progress").length || 0}
                  </span>
                </div>
                <div className="flex justify-between">
                  <span className="text-gray-400 text-sm">Active Agents</span>
                  <span className="font-semibold">
                    {project.agents?.filter(a => a.status === "WORKING").length || 0}
                  </span>
                </div>
              </div>
            </div>

            {/* AI Agents Quick View */}
            <div className="vylo-card">
              <h4 className="font-semibold mb-4">AI Agents</h4>
              <div className="space-y-3">
                {project.agents?.map((agent) => (
                  <div key={agent.id} className="flex items-center gap-3">
                    <div className={`w-3 h-3 rounded-full ${getAgentStatusColor(agent.status)} ${agent.status === "WORKING" ? "animate-pulse" : ""}`}></div>
                    <div className="flex-1">
                      <p className="text-sm font-medium">{agent.name}</p>
                      <p className="text-xs text-gray-500">{agent.status}</p>
                    </div>
                  </div>
                ))}
              </div>
            </div>

            {/* Project Info */}
            <div className="vylo-card">
              <h4 className="font-semibold mb-4">Information</h4>
              <div className="space-y-3 text-sm">
                <div>
                  <span className="text-gray-400 block mb-1">Created</span>
                  <span className="font-medium">{new Date(project.createdAt).toLocaleDateString()}</span>
                </div>
                <div>
                  <span className="text-gray-400 block mb-1">Last Updated</span>
                  <span className="font-medium">{new Date(project.updatedAt).toLocaleDateString()}</span>
                </div>
                <div>
                  <span className="text-gray-400 block mb-1">Project ID</span>
                  <span className="font-mono text-xs text-gray-500">{project.id}</span>
                </div>
              </div>
            </div>

            {/* Danger Zone */}
            <div className="vylo-card border-vylo-error/30">
              <h4 className="font-semibold mb-4 text-vylo-error">Danger Zone</h4>
              <button className="w-full px-4 py-2 bg-vylo-error/10 border border-vylo-error/30 hover:bg-vylo-error/20 text-vylo-error rounded-lg transition-all text-sm">
                Delete Project
              </button>
            </div>
          </div>
        </div>
      </div>
    </div>
  );
}