"use client";

import { useState, useEffect } from "react";

interface PersonalInfo {
  name: string;
  title: string;
  email: string;
  phone: string;
  location: string;
  linkedin: string;
  website: string;
}

interface Experience {
  id: string;
  title: string;
  company: string;
  location: string;
  startDate: string;
  endDate: string;
  bullets: string[];
}

interface Education {
  id: string;
  degree: string;
  school: string;
  location: string;
  graduationDate: string;
  gpa: string;
  honors: string;
}

export default function ResumePage() {
  const [activeTab, setActiveTab] = useState<"edit" | "preview">("edit");
  const [personal, setPersonal] = useState<PersonalInfo>({
    name: "Your Name",
    title: "Your Professional Title",
    email: "your.email@email.com",
    phone: "+1 (555) 000-0000",
    location: "City, State",
    linkedin: "linkedin.com/in/yourprofile",
    website: "yourwebsite.com"
  });

  const [experiences, setExperiences] = useState<Experience[]>([
    {
      id: "1",
      title: "Job Title",
      company: "Company Name",
      location: "City, State",
      startDate: "Jan 2020",
      endDate: "Present",
      bullets: [
        "Key achievement or responsibility with measurable impact",
        "Another accomplishment that demonstrates your skills",
        "Additional relevant contribution"
      ]
    }
  ]);

  const [education, setEducation] = useState<Education[]>([
    {
      id: "1",
      degree: "Bachelor of Science in Computer Science",
      school: "University Name",
      location: "City, State",
      graduationDate: "May 2016",
      gpa: "3.8/4.0",
      honors: "Magna Cum Laude"
    }
  ]);

  const [skills, setSkills] = useState<string[]>([
    "JavaScript/TypeScript", "React/Next.js", "Node.js", "Python",
    "AWS/Cloud Services", "Database Management", "Agile/Scrum", "Git"
  ]);

  const [languages, setLanguages] = useState<{name: string, level: string}[]>([
    { name: "English", level: "Native" },
    { name: "Spanish", level: "Professional" },
    { name: "Arabic", level: "Native" }
  ]);

  const [certifications, setCertifications] = useState<string[]>([
    "AWS Solutions Architect",
    "Google Cloud Professional"
  ]);

  useEffect(() => {
    const saved = localStorage.getItem("haitham_resume_v2");
    if (saved) {
      try {
        const data = JSON.parse(saved);
        if (data.personal) setPersonal(data.personal);
        if (data.experiences) setExperiences(data.experiences);
        if (data.education) setEducation(data.education);
        if (data.skills) setSkills(data.skills);
        if (data.languages) setLanguages(data.languages);
        if (data.certifications) setCertifications(data.certifications);
      } catch (e) {}
    }
  }, []);

  useEffect(() => {
    localStorage.setItem("haitham_resume_v2", JSON.stringify({
      personal, experiences, education, skills, languages, certifications
    }));
  }, [personal, experiences, education, skills, languages, certifications]);

  const addExperience = () => {
    setExperiences([...experiences, {
      id: Date.now().toString(),
      title: "", company: "", location: "", startDate: "", endDate: "", bullets: [""]
    }]);
  };

  const updateExperience = (id: string, field: keyof Experience, value: any) => {
    setExperiences(experiences.map(e => e.id === id ? { ...e, [field]: value } : e));
  };

  const addBullet = (id: string) => {
    setExperiences(experiences.map(e => 
      e.id === id ? { ...e, bullets: [...e.bullets, ""] } : e
    ));
  };

  const updateBullet = (expId: string, index: number, value: string) => {
    setExperiences(experiences.map(e =>
      e.id === expId ? { ...e, bullets: e.bullets.map((b, i) => i === index ? value : b) } : e
    ));
  };

  const removeBullet = (expId: string, index: number) => {
    setExperiences(experiences.map(e =>
      e.id === expId ? { ...e, bullets: e.bullets.filter((_, i) => i !== index) } : e
    ));
  };

  const addEducation = () => {
    setEducation([...education, {
      id: Date.now().toString(), degree: "", school: "", location: "",
      graduationDate: "", gpa: "", honors: ""
    }]);
  };

  const updateEducation = (id: string, field: keyof Education, value: string) => {
    setEducation(education.map(e => e.id === id ? { ...e, [field]: value } : e));
  };

  const handlePrint = () => {
    setActiveTab("preview");
    setTimeout(() => window.print(), 100);
  };

  const inputClass = "w-full bg-slate-900 border border-slate-700 rounded-lg px-3 py-2 text-white text-sm focus:outline-none focus:border-blue-500";
  const labelClass = "block text-slate-400 text-xs mb-1 font-medium";

  return (
    <div className="min-h-screen bg-slate-950 flex flex-col">
      {/* Header */}
      <div className="bg-slate-900 border-b border-slate-800 px-6 py-4 flex items-center justify-between">
        <div>
          <h1 className="text-2xl font-bold text-white">📝 Professional Resume</h1>
          <p className="text-slate-400 text-sm">Edit • Preview • Download PDF</p>
        </div>
        <div className="flex gap-2">
          <button
            onClick={() => setActiveTab(activeTab === "edit" ? "preview" : "edit")}
            className={`px-4 py-2 rounded-lg text-sm font-medium transition-colors ${
              activeTab === "edit" ? "bg-slate-700 text-white" : "bg-blue-600 text-white"
            }`}
          >
            {activeTab === "edit" ? "👁️ Preview" : "✏️ Edit"}
          </button>
          <button
            onClick={handlePrint}
            className="bg-emerald-600 hover:bg-emerald-500 text-white px-4 py-2 rounded-lg text-sm font-medium transition-colors"
          >
            📄 Download PDF
          </button>
        </div>
      </div>

      {activeTab === "edit" ? (
        <div className="flex-1 overflow-auto p-6">
          <div className="max-w-4xl mx-auto space-y-6">
            
            {/* Personal Info */}
            <div className="bg-slate-800 rounded-xl p-6 border border-slate-700">
              <h2 className="text-white font-bold mb-4">👤 Personal Information</h2>
              <div className="grid grid-cols-2 gap-4">
                <div>
                  <label className={labelClass}>Full Name</label>
                  <input type="text" value={personal.name} onChange={e => setPersonal({...personal, name: e.target.value})} className={inputClass} />
                </div>
                <div>
                  <label className={labelClass}>Professional Title</label>
                  <input type="text" value={personal.title} onChange={e => setPersonal({...personal, title: e.target.value})} className={inputClass} />
                </div>
                <div>
                  <label className={labelClass}>Email</label>
                  <input type="email" value={personal.email} onChange={e => setPersonal({...personal, email: e.target.value})} className={inputClass} />
                </div>
                <div>
                  <label className={labelClass}>Phone</label>
                  <input type="tel" value={personal.phone} onChange={e => setPersonal({...personal, phone: e.target.value})} className={inputClass} />
                </div>
                <div>
                  <label className={labelClass}>Location</label>
                  <input type="text" value={personal.location} onChange={e => setPersonal({...personal, location: e.target.value})} className={inputClass} />
                </div>
                <div>
                  <label className={labelClass}>LinkedIn</label>
                  <input type="text" value={personal.linkedin} onChange={e => setPersonal({...personal, linkedin: e.target.value})} className={inputClass} />
                </div>
              </div>
            </div>

            {/* Experience */}
            <div className="bg-slate-800 rounded-xl p-6 border border-slate-700">
              <div className="flex items-center justify-between mb-4">
                <h2 className="text-white font-bold">💼 Work Experience</h2>
                <button onClick={addExperience} className="bg-blue-600 hover:bg-blue-500 text-white px-3 py-1 rounded text-sm">+ Add Position</button>
              </div>
              {experiences.map((exp) => (
                <div key={exp.id} className="bg-slate-900 rounded-lg p-4 mb-4 border border-slate-700">
                  <div className="grid grid-cols-2 gap-4 mb-3">
                    <div>
                      <label className={labelClass}>Job Title</label>
                      <input type="text" value={exp.title} onChange={e => updateExperience(exp.id, "title", e.target.value)} className={inputClass} />
                    </div>
                    <div>
                      <label className={labelClass}>Company</label>
                      <input type="text" value={exp.company} onChange={e => updateExperience(exp.id, "company", e.target.value)} className={inputClass} />
                    </div>
                    <div>
                      <label className={labelClass}>Location</label>
                      <input type="text" value={exp.location} onChange={e => updateExperience(exp.id, "location", e.target.value)} className={inputClass} />
                    </div>
                    <div className="flex gap-2">
                      <div className="flex-1">
                        <label className={labelClass}>Start</label>
                        <input type="text" value={exp.startDate} onChange={e => updateExperience(exp.id, "startDate", e.target.value)} className={inputClass} placeholder="Jan 2020" />
                      </div>
                      <div className="flex-1">
                        <label className={labelClass}>End</label>
                        <input type="text" value={exp.endDate} onChange={e => updateExperience(exp.id, "endDate", e.target.value)} className={inputClass} placeholder="Present" />
                      </div>
                    </div>
                  </div>
                  <div className="mb-2">
                    <label className={labelClass}>Key Achievements</label>
                    {exp.bullets.map((bullet, i) => (
                      <div key={i} className="flex gap-2 mb-2">
                        <input type="text" value={bullet} onChange={e => updateBullet(exp.id, i, e.target.value)} className={inputClass} placeholder={`Achievement ${i + 1}`} />
                        {exp.bullets.length > 1 && (
                          <button onClick={() => removeBullet(exp.id, i)} className="text-red-400 hover:text-red-300 text-sm px-2">✕</button>
                        )}
                      </div>
                    ))}
                    <button onClick={() => addBullet(exp.id)} className="text-blue-400 hover:text-blue-300 text-xs">+ Add achievement</button>
                  </div>
                </div>
              ))}
            </div>

            {/* Education */}
            <div className="bg-slate-800 rounded-xl p-6 border border-slate-700">
              <div className="flex items-center justify-between mb-4">
                <h2 className="text-white font-bold">🎓 Education</h2>
                <button onClick={addEducation} className="bg-blue-600 hover:bg-blue-500 text-white px-3 py-1 rounded text-sm">+ Add</button>
              </div>
              {education.map((edu) => (
                <div key={edu.id} className="bg-slate-900 rounded-lg p-4 mb-4 border border-slate-700">
                  <div className="grid grid-cols-2 gap-4">
                    <div>
                      <label className={labelClass}>Degree</label>
                      <input type="text" value={edu.degree} onChange={e => updateEducation(edu.id, "degree", e.target.value)} className={inputClass} />
                    </div>
                    <div>
                      <label className={labelClass}>School</label>
                      <input type="text" value={edu.school} onChange={e => updateEducation(edu.id, "school", e.target.value)} className={inputClass} />
                    </div>
                    <div>
                      <label className={labelClass}>Location</label>
                      <input type="text" value={edu.location} onChange={e => updateEducation(edu.id, "location", e.target.value)} className={inputClass} />
                    </div>
                    <div>
                      <label className={labelClass}>Graduation Date</label>
                      <input type="text" value={edu.graduationDate} onChange={e => updateEducation(edu.id, "graduationDate", e.target.value)} className={inputClass} />
                    </div>
                    <div>
                      <label className={labelClass}>GPA (optional)</label>
                      <input type="text" value={edu.gpa} onChange={e => updateEducation(edu.id, "gpa", e.target.value)} className={inputClass} />
                    </div>
                    <div>
                      <label className={labelClass}>Honors (optional)</label>
                      <input type="text" value={edu.honors} onChange={e => updateEducation(edu.id, "honors", e.target.value)} className={inputClass} placeholder="Magna Cum Laude" />
                    </div>
                  </div>
                </div>
              ))}
            </div>

            {/* Skills */}
            <div className="bg-slate-800 rounded-xl p-6 border border-slate-700">
              <h2 className="text-white font-bold mb-4">🛠️ Technical Skills</h2>
              <div className="flex flex-wrap gap-2">
                {skills.map((skill, i) => (
                  <div key={i} className="flex items-center gap-2 bg-slate-900 rounded-lg px-3 py-1">
                    <input
                      type="text"
                      value={skill}
                      onChange={e => {
                        const newSkills = [...skills];
                        newSkills[i] = e.target.value;
                        setSkills(newSkills);
                      }}
                      className="bg-transparent text-white text-sm w-24 focus:outline-none"
                    />
                    <button onClick={() => setSkills(skills.filter((_, j) => j !== i))} className="text-slate-500 hover:text-red-400 text-xs">✕</button>
                  </div>
                ))}
                <button onClick={() => setSkills([...skills, ""])} className="bg-slate-700 hover:bg-slate-600 text-white text-sm px-3 py-1 rounded-lg">+ Add</button>
              </div>
            </div>

            {/* Languages */}
            <div className="bg-slate-800 rounded-xl p-6 border border-slate-700">
              <h2 className="text-white font-bold mb-4">🌍 Languages</h2>
              <div className="flex flex-wrap gap-3">
                {languages.map((lang, i) => (
                  <div key={i} className="flex items-center gap-2 bg-slate-900 rounded-lg px-3 py-2">
                    <input
                      type="text"
                      value={lang.name}
                      onChange={e => {
                        const newLangs = [...languages];
                        newLangs[i].name = e.target.value;
                        setLanguages(newLangs);
                      }}
                      className="bg-transparent text-white text-sm w-24 focus:outline-none"
                    />
                    <span className="text-slate-500 text-xs">•</span>
                    <input
                      type="text"
                      value={lang.level}
                      onChange={e => {
                        const newLangs = [...languages];
                        newLangs[i].level = e.target.value;
                        setLanguages(newLangs);
                      }}
                      className="bg-transparent text-slate-400 text-sm w-20 focus:outline-none"
                    />
                  </div>
                ))}
                <button onClick={() => setLanguages([...languages, {name: "", level: ""}])} className="bg-slate-700 hover:bg-slate-600 text-white text-sm px-3 py-2 rounded-lg">+ Add</button>
              </div>
            </div>

            {/* Certifications */}
            <div className="bg-slate-800 rounded-xl p-6 border border-slate-700">
              <h2 className="text-white font-bold mb-4">📜 Certifications</h2>
              <div className="flex flex-wrap gap-2">
                {certifications.map((cert, i) => (
                  <div key={i} className="flex items-center gap-2 bg-slate-900 rounded-lg px-3 py-1">
                    <input
                      type="text"
                      value={cert}
                      onChange={e => {
                        const newCerts = [...certifications];
                        newCerts[i] = e.target.value;
                        setCertifications(newCerts);
                      }}
                      className="bg-transparent text-white text-sm w-40 focus:outline-none"
                    />
                    <button onClick={() => setCertifications(certifications.filter((_, j) => j !== i))} className="text-slate-500 hover:text-red-400 text-xs">✕</button>
                  </div>
                ))}
                <button onClick={() => setCertifications([...certifications, ""])} className="bg-slate-700 hover:bg-slate-600 text-white text-sm px-3 py-1 rounded-lg">+ Add</button>
              </div>
            </div>

          </div>
        </div>
      ) : (
        /* PREVIEW - Professional Resume Template */
        <div className="flex-1 overflow-auto bg-slate-100 p-8">
          <div className="max-w-850px mx-auto bg-white shadow-xl rounded-lg overflow-hidden" style={{maxWidth: "850px"}}>
            
            {/* Header - Dark Blue Professional */}
            <div className="bg-gradient-to-r from-slate-800 to-slate-700 text-white px-8 py-10">
              <div className="text-center mb-4">
                <h1 className="text-3xl font-bold tracking-wide mb-2">{personal.name || "Your Name"}</h1>
                <div className="text-slate-300 text-lg font-light">{personal.title || "Professional Title"}</div>
              </div>
              <div className="flex justify-center flex-wrap gap-4 text-sm text-slate-300">
                {personal.email && <span>✉️ {personal.email}</span>}
                {personal.phone && <span>📱 {personal.phone}</span>}
                {personal.location && <span>📍 {personal.location}</span>}
                {personal.linkedin && <span>💼 {personal.linkedin}</span>}
              </div>
            </div>

            {/* Body */}
            <div className="px-8 py-6 space-y-6">
              
              {/* Summary */}
              <div>
                <div className="border-b-2 border-slate-800 pb-1 mb-3">
                  <span className="text-sm font-bold text-slate-800 uppercase tracking-wider">Professional Summary</span>
                </div>
                <p className="text-slate-600 text-sm leading-relaxed">
                  Results-driven professional with proven expertise in delivering high-impact solutions. Skilled in modern technologies and best practices. Demonstrated ability to lead projects, optimize processes, and achieve organizational goals.
                </p>
              </div>

              {/* Experience */}
              <div>
                <div className="border-b-2 border-slate-800 pb-1 mb-3">
                  <span className="text-sm font-bold text-slate-800 uppercase tracking-wider">Work Experience</span>
                </div>
                {experiences.filter(e => e.title || e.company).map((exp) => (
                  <div key={exp.id} className="mb-4">
                    <div className="flex justify-between items-baseline mb-1">
                      <div>
                        <span className="font-bold text-slate-800">{exp.title || "Job Title"}</span>
                        <span className="text-slate-600"> | {exp.company || "Company"}</span>
                      </div>
                      <span className="text-slate-500 text-sm">{exp.startDate} - {exp.endDate}</span>
                    </div>
                    {exp.location && <div className="text-slate-500 text-sm mb-2">{exp.location}</div>}
                    <ul className="space-y-1">
                      {exp.bullets.filter(b => b).map((bullet, i) => (
                        <li key={i} className="text-slate-600 text-sm flex items-start gap-2">
                          <span className="text-slate-400">•</span>
                          <span>{bullet}</span>
                        </li>
                      ))}
                    </ul>
                  </div>
                ))}
              </div>

              {/* Education */}
              <div>
                <div className="border-b-2 border-slate-800 pb-1 mb-3">
                  <span className="text-sm font-bold text-slate-800 uppercase tracking-wider">Education</span>
                </div>
                {education.filter(e => e.degree || e.school).map((edu) => (
                  <div key={edu.id} className="mb-3">
                    <div className="flex justify-between items-baseline">
                      <div>
                        <span className="font-bold text-slate-800">{edu.degree || "Degree"}</span>
                        {edu.honors && <span className="text-slate-500"> ({edu.honors})</span>}
                      </div>
                      <span className="text-slate-500 text-sm">{edu.graduationDate}</span>
                    </div>
                    <div className="text-slate-600 text-sm">{edu.school}{edu.location && `, ${edu.location}`}</div>
                    {edu.gpa && <div className="text-slate-500 text-sm">GPA: {edu.gpa}</div>}
                  </div>
                ))}
              </div>

              {/* Skills */}
              <div>
                <div className="border-b-2 border-slate-800 pb-1 mb-3">
                  <span className="text-sm font-bold text-slate-800 uppercase tracking-wider">Technical Skills</span>
                </div>
                <div className="flex flex-wrap gap-2">
                  {skills.filter(s => s).map((skill, i) => (
                    <span key={i} className="bg-slate-100 text-slate-700 px-3 py-1 rounded text-sm">{skill}</span>
                  ))}
                </div>
              </div>

              {/* Languages & Certs */}
              <div className="grid grid-cols-2 gap-6">
                <div>
                  <div className="border-b-2 border-slate-800 pb-1 mb-3">
                    <span className="text-sm font-bold text-slate-800 uppercase tracking-wider">Languages</span>
                  </div>
                  <div className="space-y-1">
                    {languages.filter(l => l.name).map((lang, i) => (
                      <div key={i} className="text-sm">
                        <span className="text-slate-800 font-medium">{lang.name}</span>
                        <span className="text-slate-500"> - {lang.level}</span>
                      </div>
                    ))}
                  </div>
                </div>
                <div>
                  <div className="border-b-2 border-slate-800 pb-1 mb-3">
                    <span className="text-sm font-bold text-slate-800 uppercase tracking-wider">Certifications</span>
                  </div>
                  <div className="space-y-1">
                    {certifications.filter(c => c).map((cert, i) => (
                      <div key={i} className="text-slate-700 text-sm">{cert}</div>
                    ))}
                  </div>
                </div>
              </div>

            </div>
          </div>
        </div>
      )}

      <style jsx global>{`
        @media print {
          body { background: white !important; }
          .bg-slate-100 { background: white !important; }
        }
      `}</style>
    </div>
  );
}