/**
 * Migration Runner: Restores sqlite-export.json into target PostgreSQL instance
 * Usage: DATABASE_URL="postgresql://user:password@host:5432/jobsboard" node scripts/import-postgres-data.js
 */
const { PrismaClient } = require("@prisma/client");
const fs = require("fs");
const path = require("path");

const prisma = new PrismaClient();

async function importData() {
  const exportFile = path.join(__dirname, "sqlite-export.json");
  if (!fs.existsSync(exportFile)) {
    console.error("Export file not found: sqlite-export.json. Run export-sqlite-data.js first.");
    process.exit(1);
  }

  const data = JSON.parse(fs.readFileSync(exportFile, "utf-8"));
  console.log("Starting import into target database...");

  // 1. Companies
  console.log(`Importing ${data.companies.length} companies...`);
  for (const c of data.companies) {
    await prisma.company.upsert({
      where: { id: c.id },
      update: {},
      create: {
        id: c.id,
        name: c.name,
        logoUrl: c.logoUrl,
        website: c.website,
        cultureInfo: c.cultureInfo,
        location: c.location,
        description: c.description,
        createdAt: new Date(c.createdAt),
        updatedAt: new Date(c.updatedAt),
      },
    });
  }

  // 2. Users
  console.log(`Importing ${data.users.length} users...`);
  for (const u of data.users) {
    await prisma.user.upsert({
      where: { id: u.id },
      update: {},
      create: {
        id: u.id,
        email: u.email,
        passwordHash: u.passwordHash,
        name: u.name,
        role: u.role,
        companyId: u.companyId,
        failedLoginAttempts: u.failedLoginAttempts || 0,
        lockedUntil: u.lockedUntil ? new Date(u.lockedUntil) : null,
        createdAt: new Date(u.createdAt),
        updatedAt: new Date(u.updatedAt),
      },
    });
  }

  // 3. User Profiles & Children
  console.log(`Importing profiles and skills...`);
  for (const p of data.userProfiles) {
    await prisma.userProfile.upsert({
      where: { id: p.id },
      update: {},
      create: {
        id: p.id,
        userId: p.userId,
        headline: p.headline,
        bio: p.bio,
        phone: p.phone,
        location: p.location,
        isPublic: p.isPublic,
        searchableToEmployers: p.searchableToEmployers,
        createdAt: new Date(p.createdAt),
        updatedAt: new Date(p.updatedAt),
      },
    });
  }

  for (const s of data.candidateSkills) {
    await prisma.candidateSkill.upsert({
      where: { id: s.id },
      update: {},
      create: {
        id: s.id,
        profileId: s.profileId,
        name: s.name,
        level: s.level,
      },
    });
  }

  // 4. Resumes
  console.log(`Importing ${data.resumes.length} resumes...`);
  for (const r of data.resumes) {
    await prisma.resume.upsert({
      where: { id: r.id },
      update: {},
      create: {
        id: r.id,
        userId: r.userId,
        title: r.title,
        data: r.data,
        isActiveForMatching: r.isActiveForMatching,
        createdAt: new Date(r.createdAt),
        updatedAt: new Date(r.updatedAt),
      },
    });
  }

  // 5. Jobs
  console.log(`Importing ${data.jobs.length} jobs...`);
  for (const j of data.jobs) {
    await prisma.job.upsert({
      where: { id: j.id },
      update: {},
      create: {
        id: j.id,
        jobUrlHash: j.jobUrlHash,
        title: j.title,
        company: j.company,
        location: j.location,
        isRemote: j.isRemote,
        department: j.department,
        experienceLevel: j.experienceLevel,
        description: j.description,
        salaryMin: j.salaryMin,
        salaryMax: j.salaryMax,
        jobUrl: j.jobUrl,
        source: j.source,
        datePosted: j.datePosted ? new Date(j.datePosted) : null,
        companyId: j.companyId,
        postedById: j.postedById,
        createdAt: new Date(j.createdAt),
        updatedAt: new Date(j.updatedAt),
      },
    });
  }

  // 6. Applications
  console.log(`Importing ${data.applications.length} applications...`);
  for (const a of data.applications) {
    await prisma.application.upsert({
      where: { id: a.id },
      update: {},
      create: {
        id: a.id,
        jobId: a.jobId,
        applicantId: a.applicantId,
        status: a.status,
        coverLetter: a.coverLetter,
        snapshotJson: a.snapshotJson,
        employerNotes: a.employerNotes,
        createdAt: new Date(a.createdAt),
        updatedAt: new Date(a.updatedAt),
      },
    });
  }

  console.log("Migration complete!");
}

importData()
  .catch(console.error)
  .finally(() => prisma.$disconnect());