import { PrismaClient } from "@prisma/client";
import * as bcrypt from "bcryptjs";

const prisma = new PrismaClient();

// ─── Helpers ─────────────────────────────────────────────────────────────────

function cuid(seed: string): string {
  // Deterministic CUID-like string for idempotent seeding
  return seed.padStart(25, "c");
}

function mockCmsId(prefix: string, index: number): string {
  return `${prefix}_${String(index).padStart(4, "0")}`;
}

async function ensureTenant(
  slug: string,
  data: Parameters<typeof prisma.tenant.create>[0]["data"],
) {
  const existing = await prisma.tenant.findUnique({ where: { slug } });
  if (existing) {
    console.log(`  ℹ Tenant "${slug}" already exists, skipping`);
    return existing;
  }
  return prisma.tenant.create({ data });
}

async function ensureUser(
  email: string,
  data: Parameters<typeof prisma.user.create>[0]["data"],
) {
  const existing = await prisma.user.findUnique({ where: { email } });
  if (existing) {
    console.log(`  ℹ User "${email}" already exists, skipping`);
    return existing;
  }
  return prisma.user.create({ data });
}

async function ensureModule(
  cmsId: string,
  data: Parameters<typeof prisma.module.create>[0]["data"],
) {
  const existing = await prisma.module.findFirst({ where: { cmsId } });
  if (existing) {
    return existing;
  }
  return prisma.module.create({ data });
}

async function ensureLesson(
  cmsId: string,
  data: Parameters<typeof prisma.lesson.create>[0]["data"],
) {
  const existing = await prisma.lesson.findFirst({ where: { cmsId } });
  if (existing) {
    return existing;
  }
  return prisma.lesson.create({ data });
}

async function ensureBadge(
  key: string,
  data: Parameters<typeof prisma.badge.create>[0]["data"],
) {
  const existing = await prisma.badge.findUnique({ where: { key } });
  if (existing) {
    console.log(`  ℹ Badge "${key}" already exists, skipping`);
    return existing;
  }
  return prisma.badge.create({ data });
}

// ─── Data Definitions ────────────────────────────────────────────────────────

const CURRICULUM_DATA: Array<{
  track: string;
  modules: Array<{
    title: string;
    description: string;
    order: number;
    estimatedHours: number;
    lessons: Array<{
      title: string;
      description: string;
      order: number;
      estimatedMins: number;
    }>;
  }>;
}> = [
  {
    track: "SURVIVAL_BASICS",
    modules: [
      {
        title: "Budgeting 101",
        description: "Learn how to create and maintain a personal budget",
        order: 1,
        estimatedHours: 1.5,
        lessons: [
          {
            title: "What is a Budget?",
            description: "Understanding the fundamentals of budgeting",
            order: 1,
            estimatedMins: 10,
          },
          {
            title: "Tracking Your Expenses",
            description: "How to monitor where your money goes",
            order: 2,
            estimatedMins: 15,
          },
          {
            title: "The 50/30/20 Rule",
            description: "A simple framework for allocating your income",
            order: 3,
            estimatedMins: 12,
          },
        ],
      },
      {
        title: "Emergency Fund",
        description: "Build your financial safety net",
        order: 2,
        estimatedHours: 1.0,
        lessons: [
          {
            title: "Why You Need an Emergency Fund",
            description: "The importance of having cash reserves",
            order: 1,
            estimatedMins: 8,
          },
          {
            title: "How Much to Save",
            description: "Calculating your target emergency fund amount",
            order: 2,
            estimatedMins: 10,
          },
          {
            title: "Where to Keep Your Fund",
            description: "High-yield savings accounts and other options",
            order: 3,
            estimatedMins: 7,
          },
        ],
      },
    ],
  },
  {
    track: "CREDIT_DEBT",
    modules: [
      {
        title: "Understanding Credit Scores",
        description: "Demystifying credit reporting and scoring",
        order: 1,
        estimatedHours: 1.5,
        lessons: [
          {
            title: "What Is a Credit Score?",
            description: "The basics of credit scoring models",
            order: 1,
            estimatedMins: 10,
          },
          {
            title: "Factors That Affect Your Score",
            description: "Payment history, utilization, and more",
            order: 2,
            estimatedMins: 15,
          },
          {
            title: "How to Improve Your Credit",
            description: "Actionable steps to build better credit",
            order: 3,
            estimatedMins: 12,
          },
        ],
      },
      {
        title: "Debt Repayment Strategies",
        description: "Methods to eliminate debt efficiently",
        order: 2,
        estimatedHours: 1.0,
        lessons: [
          {
            title: "Snowball vs Avalanche",
            description: "Comparing two popular debt payoff methods",
            order: 1,
            estimatedMins: 10,
          },
          {
            title: "Debt Consolidation",
            description: "When and how to consolidate your debts",
            order: 2,
            estimatedMins: 8,
          },
          {
            title: "Avoiding Debt Traps",
            description: "Predatory lending and high-interest pitfalls",
            order: 3,
            estimatedMins: 10,
          },
        ],
      },
    ],
  },
  {
    track: "WEALTH_BUILDER",
    modules: [
      {
        title: "Investing Basics",
        description: "Getting started with investing",
        order: 1,
        estimatedHours: 2.0,
        lessons: [
          {
            title: "Stocks, Bonds & ETFs",
            description: "Understanding different asset classes",
            order: 1,
            estimatedMins: 15,
          },
          {
            title: "Risk & Return",
            description: "The fundamental trade-off in investing",
            order: 2,
            estimatedMins: 12,
          },
          {
            title: "Dollar-Cost Averaging",
            description: "A disciplined approach to investing regularly",
            order: 3,
            estimatedMins: 10,
          },
        ],
      },
      {
        title: "Compound Interest",
        description: "The eighth wonder of the world",
        order: 2,
        estimatedHours: 1.0,
        lessons: [
          {
            title: "How Compounding Works",
            description: "The math behind exponential growth",
            order: 1,
            estimatedMins: 10,
          },
          {
            title: "Time Is Your Superpower",
            description: "Why starting early matters more than timing",
            order: 2,
            estimatedMins: 8,
          },
          {
            title: "The Rule of 72",
            description: "A quick way to estimate doubling time",
            order: 3,
            estimatedMins: 6,
          },
        ],
      },
    ],
  },
  {
    track: "ANTI_HYPE",
    modules: [
      {
        title: "Critical Thinking in Finance",
        description: "Developing a skeptic's mindset",
        order: 1,
        estimatedHours: 1.5,
        lessons: [
          {
            title: "Identifying Hype Cycles",
            description: "Recognizing when euphoria drives markets",
            order: 1,
            estimatedMins: 12,
          },
          {
            title: "Social Media & Investing",
            description: "How online echo chambers affect decisions",
            order: 2,
            estimatedMins: 10,
          },
          {
            title: "Due Diligence 101",
            description: "Researching before you invest",
            order: 3,
            estimatedMins: 15,
          },
        ],
      },
      {
        title: "Recognizing Bubbles",
        description: "Historical and modern market bubbles",
        order: 2,
        estimatedHours: 1.5,
        lessons: [
          {
            title: "Tulip Mania to Dot-Com",
            description: "Classic bubble case studies",
            order: 1,
            estimatedMins: 15,
          },
          {
            title: "Crypto Mania",
            description: "Evaluating digital asset hype",
            order: 2,
            estimatedMins: 12,
          },
          {
            title: "Bubble Indicators",
            description: "Signs that a market is overheating",
            order: 3,
            estimatedMins: 10,
          },
        ],
      },
    ],
  },
  {
    track: "MACROECONOMICS",
    modules: [
      {
        title: "Supply and Demand",
        description: "The foundation of economic thinking",
        order: 1,
        estimatedHours: 1.5,
        lessons: [
          {
            title: "Market Equilibrium",
            description: "How prices are determined",
            order: 1,
            estimatedMins: 12,
          },
          {
            title: "Elasticity",
            description: "How quantity responds to price changes",
            order: 2,
            estimatedMins: 10,
          },
          {
            title: "Market Failures",
            description: "Externalities, public goods, and inefficiencies",
            order: 3,
            estimatedMins: 14,
          },
        ],
      },
      {
        title: "Monetary Policy",
        description: "How central banks shape the economy",
        order: 2,
        estimatedHours: 1.5,
        lessons: [
          {
            title: "Interest Rates & Inflation",
            description: "The tools central banks use",
            order: 1,
            estimatedMins: 12,
          },
          {
            title: "Quantitative Easing",
            description: "Unconventional monetary policy explained",
            order: 2,
            estimatedMins: 10,
          },
          {
            title: "Global Economic Indicators",
            description: "GDP, unemployment, and CPI",
            order: 3,
            estimatedMins: 15,
          },
        ],
      },
    ],
  },
];

const BADGE_DATA: Array<{
  key: string;
  name: string;
  description: string;
  icon: string;
  category: string;
  criteria: Record<string, unknown>;
  xpReward: number;
}> = [
  {
    key: "first-trade",
    name: "First Trade",
    description: "Execute your very first trade in any simulation",
    icon: "trophy",
    category: "MILESTONE",
    criteria: { type: "trade_count", threshold: 1 },
    xpReward: 25,
  },
  {
    key: "diversifier",
    name: "Diversifier",
    description: "Hold 5 or more different assets in a single portfolio",
    icon: "pie-chart",
    category: "SKILL",
    criteria: { type: "asset_diversity", threshold: 5 },
    xpReward: 75,
  },
  {
    key: "crash-survivor",
    name: "Crash Survivor",
    description: "Survive a market crash simulation without going bankrupt",
    icon: "shield",
    category: "CHALLENGE",
    criteria: { type: "simulation_survive", simulationType: "MARKET_CRASH" },
    xpReward: 100,
  },
  {
    key: "debt-destroyer",
    name: "Debt Destroyer",
    description: "Successfully complete the debt repayment simulation",
    icon: "broken-chain",
    category: "CHALLENGE",
    criteria: { type: "simulation_complete", simulationType: "DEBT_REPAYMENT" },
    xpReward: 100,
  },
  {
    key: "the-skeptic",
    name: "The Skeptic",
    description: "Correctly identify and avoid 3 hype traps",
    icon: "magnifying-glass",
    category: "SKILL",
    criteria: { type: "hype_avoided", threshold: 3 },
    xpReward: 150,
  },
  {
    key: "streak-master",
    name: "Streak Master",
    description: "Maintain a 30-day login streak",
    icon: "fire",
    category: "STREAK",
    criteria: { type: "streak_days", threshold: 30 },
    xpReward: 200,
  },
  {
    key: "portfolio-millionaire",
    name: "Portfolio Millionaire",
    description: "Reach a portfolio value of $1,000,000",
    icon: "diamond",
    category: "MILESTONE",
    criteria: { type: "portfolio_value", threshold: 1_000_000 },
    xpReward: 500,
  },
  {
    key: "quick-learner",
    name: "Quick Learner",
    description: "Complete 10 lessons in a single day",
    icon: "rocket",
    category: "CHALLENGE",
    criteria: { type: "lessons_in_day", threshold: 10 },
    xpReward: 100,
  },
  {
    key: "teacher-pet",
    name: "Teacher's Pet",
    description: "Score 100% on 5 different quizzes",
    icon: "apple",
    category: "MILESTONE",
    criteria: { type: "perfect_quizzes", threshold: 5 },
    xpReward: 150,
  },
  {
    key: "risk-avoider",
    name: "Risk Avoider",
    description: "Heed 5 risk warnings instead of ignoring them",
    icon: "umbrella",
    category: "SKILL",
    criteria: { type: "risk_warnings_heeded", threshold: 5 },
    xpReward: 75,
  },
  {
    key: "simulation-champion",
    name: "Simulation Champion",
    description: "Win or top the leaderboard in 3 different simulations",
    icon: "crown",
    category: "CHALLENGE",
    criteria: { type: "simulation_wins", threshold: 3 },
    xpReward: 250,
  },
  {
    key: "hype-avoider",
    name: "Hype Avoider",
    description: "Resist the urge to buy into a trending hype asset",
    icon: "eye",
    category: "SPECIAL",
    criteria: { type: "hype_trap_resisted", threshold: 1 },
    xpReward: 50,
  },
];

// ─── Main Seeding Logic ──────────────────────────────────────────────────────

async function main() {
  console.log("🌱 Seeding InvestPlay database...\n");

  // ── 1. Tenants ──────────────────────────────────────────────────────────

  console.log("📋 Creating tenants...");
  const platformTenant = await ensureTenant("investplay", {
    id: cuid("tenant-platform"),
    name: "InvestPlay",
    slug: "investplay",
    domain: "app.investplay.dev",
    domains: ["app.investplay.dev"],
    branding: {
      logoUrl: "https://investplay.dev/logo.png",
      primaryColor: "#6366f1",
      accentColor: "#06b6d4",
    },
    featureFlags: {
      aiCoach: true,
      simulations: true,
      classrooms: true,
      newsFeed: true,
    },
    aiMode: "MANAGED",
    aiMonthlyTokenBudget: 10_000_000,
    defaultLocale: "en",
    subscriptionStatus: "ACTIVE",
    maxStudents: 1000,
  });
  console.log(`  ✅ Platform tenant: ${platformTenant.slug}`);

  const demoTenant = await ensureTenant("demo-university", {
    id: cuid("tenant-demo"),
    name: "Demo University",
    slug: "demo-university",
    domain: "demo.university.edu",
    domains: ["demo.university.edu", "student.demo.edu"],
    branding: {
      logoUrl: "https://demo.university.edu/logo.png",
      primaryColor: "#059669",
      accentColor: "#f59e0b",
    },
    featureFlags: {
      aiCoach: true,
      simulations: true,
      classrooms: true,
      newsFeed: false,
    },
    aiMode: "MANAGED",
    aiMonthlyTokenBudget: 5_000_000,
    defaultLocale: "en",
    subscriptionStatus: "ACTIVE",
    maxStudents: 200,
  });
  console.log(`  ✅ Demo tenant: ${demoTenant.slug}\n`);

  // ── 2. Users ────────────────────────────────────────────────────────────

  console.log("👤 Creating users...");
  const passwordHash = await bcrypt.hash("Admin123!", 10);

  const adminUser = await ensureUser("admin@investplay.dev", {
    id: cuid("user-admin"),
    email: "admin@investplay.dev",
    passwordHash,
    firstName: "Platform",
    lastName: "Admin",
    role: "PLATFORM_ADMIN",
    locale: "en",
    tenantId: platformTenant.id,
    xp: 9999,
    level: 50,
    streakDays: 100,
    emailVerifiedAt: new Date(),
  });
  console.log(`  ✅ Platform admin: ${adminUser.email}`);

  const teacherUser = await ensureUser("teacher@demouni.edu", {
    id: cuid("user-teacher"),
    email: "teacher@demouni.edu",
    passwordHash,
    firstName: "Jane",
    lastName: "Educator",
    role: "TEACHER",
    locale: "en",
    tenantId: demoTenant.id,
    xp: 2500,
    level: 15,
    streakDays: 30,
    emailVerifiedAt: new Date(),
  });
  console.log(`  ✅ Demo teacher: ${teacherUser.email}`);

  const studentUser = await ensureUser("student@demo.edu", {
    id: cuid("user-student"),
    email: "student@demo.edu",
    passwordHash,
    firstName: "Alex",
    lastName: "Learner",
    role: "STUDENT",
    locale: "en",
    tenantId: demoTenant.id,
    xp: 450,
    level: 5,
    streakDays: 7,
    emailVerifiedAt: new Date(),
  });
  console.log(`  ✅ Demo student: ${studentUser.email}\n`);

  // ── 3. Curriculum ───────────────────────────────────────────────────────

  console.log("📚 Creating curriculum...");

  let lessonIdCounter = 0;
  const createdLessons: Array<{ cmsId: string; lessonId: string; track: string }> = [];

  for (const trackData of CURRICULUM_DATA) {
    let moduleIndex = 0;
    for (const moduleData of trackData.modules) {
      moduleIndex++;
      const moduleCmsId = mockCmsId(
        trackData.track.substring(0, 3),
        moduleIndex,
      );

      const module = await ensureModule(moduleCmsId, {
        id: cuid(`module-${trackData.track}-${moduleIndex}`),
        cmsId: moduleCmsId,
        track: trackData.track as any,
        title: moduleData.title,
        description: moduleData.description,
        order: moduleData.order,
        estimatedHours: moduleData.estimatedHours,
        xpReward: 100,
        tenantId: null,
        isActive: true,
      });

      let lessonIndex = 0;
      for (const lessonData of moduleData.lessons) {
        lessonIndex++;
        lessonIdCounter++;
        const lessonCmsId = mockCmsId(
          `${trackData.track.substring(0, 3)}${moduleIndex}L`,
          lessonIndex,
        );

        // Determine gating: first lesson of each module has no prerequisite
        // Subsequent lessons require the previous lesson in the module
        const requiredLessonCmsId =
          lessonIndex > 1
            ? mockCmsId(
                `${trackData.track.substring(0, 3)}${moduleIndex}L`,
                lessonIndex - 1,
              )
            : null;

        const requiredLesson =
          requiredLessonCmsId !== null
            ? createdLessons.find(
                (l) => l.cmsId === requiredLessonCmsId && l.track === trackData.track,
              )
            : null;

        const lesson = await ensureLesson(lessonCmsId, {
          id: cuid(`lesson-${trackData.track}-${moduleIndex}-${lessonIndex}`),
          cmsId: lessonCmsId,
          moduleId: module.id,
          title: lessonData.title,
          description: lessonData.description,
          order: lessonData.order,
          estimatedMins: lessonData.estimatedMins,
          xpReward: 25,
          requiredLessonId: requiredLesson?.lessonId ?? null,
          blocks: {
            type: "doc",
            content: [
              {
                type: "heading",
                attrs: { level: 1 },
                content: [{ type: "text", text: lessonData.title }],
              },
              {
                type: "paragraph",
                content: [
                  {
                    type: "text",
                    text: lessonData.description,
                  },
                ],
              },
            ],
          },
          isActive: true,
        });

        createdLessons.push({
          cmsId: lessonCmsId,
          lessonId: lesson.id,
          track: trackData.track,
        });
      }
    }
  }
  console.log(`  ✅ Created ${createdLessons.length} lessons across 10 modules\n`);

  // ── 4. Badges ───────────────────────────────────────────────────────────

  console.log("🏅 Creating badges...");
  for (const badgeData of BADGE_DATA) {
    await ensureBadge(badgeData.key, {
      id: cuid(`badge-${badgeData.key}`),
      key: badgeData.key,
      name: badgeData.name,
      description: badgeData.description,
      icon: badgeData.icon,
      category: badgeData.category as any,
      criteria: badgeData.criteria,
      xpReward: badgeData.xpReward,
    });
  }
  console.log(`  ✅ Created ${BADGE_DATA.length} badges\n`);

  // ── 5. Classroom ────────────────────────────────────────────────────────

  console.log("🏫 Creating demo classroom...");
  const classroomId = cuid("classroom-demo");
  const existingClassroom = await prisma.classroom.findFirst({
    where: { inviteCode: "DEMO123" },
  });

  let classroom;
  if (existingClassroom) {
    classroom = existingClassroom;
    console.log(`  ℹ Classroom "Demo 101" already exists, skipping`);
  } else {
    classroom = await prisma.classroom.create({
      data: {
        id: classroomId,
        name: "Demo 101 – Personal Finance",
        description:
          "Introduction to personal finance for first-year students. This classroom covers budgeting, credit, and investing fundamentals.",
        tenantId: demoTenant.id,
        teacherId: teacherUser.id,
        inviteCode: "DEMO123",
        isActive: true,
      },
    });
    console.log(`  ✅ Created classroom: ${classroom.name}`);

    // Enroll the student
    const existingEnrollment = await prisma.classroomStudent.findUnique({
      where: {
        classroomId_userId: {
          classroomId: classroom.id,
          userId: studentUser.id,
        },
      },
    });

    if (!existingEnrollment) {
      await prisma.classroomStudent.create({
        data: {
          id: cuid("enrollment-demo"),
          classroomId: classroom.id,
          userId: studentUser.id,
        },
      });
      console.log(`  ✅ Enrolled ${studentUser.email} in ${classroom.name}`);
    } else {
      console.log(`  ℹ ${studentUser.email} already enrolled, skipping`);
    }
  }

  // ── 6. Assign first-module lesson progress for the demo student ────────

  const firstLesson = createdLessons.find((l) => l.track === "SURVIVAL_BASICS");
  if (firstLesson) {
    const existingProgress = await prisma.userProgress.findUnique({
      where: {
        userId_lessonId: {
          userId: studentUser.id,
          lessonId: firstLesson.lessonId,
        },
      },
    });

    if (!existingProgress) {
      await prisma.userProgress.create({
        data: {
          id: cuid("progress-demo-1"),
          userId: studentUser.id,
          lessonId: firstLesson.lessonId,
          status: "COMPLETED",
          quizScore: 90,
          quizAttempts: 1,
          timeSpentSeconds: 420,
          completedAt: new Date(),
        },
      });

      // Also grant XP for the completed lesson
      await prisma.xPEvent.create({
        data: {
          id: cuid("xpevent-demo-1"),
          userId: studentUser.id,
          reason: "LESSON_COMPLETED",
          amount: 25,
          context: { lessonId: firstLesson.lessonId },
        },
      });
      console.log(`  ✅ Demo student progress created for first lesson\n`);
    } else {
      console.log(`  ℹ Demo student progress exists, skipping\n`);
    }
  }

  console.log("────────────────────────────────────────────");
  console.log("✅ Seeding complete!");
  console.log("────────────────────────────────────────────");
  console.log("  Admin:   admin@investplay.dev / Admin123!");
  console.log("  Teacher: teacher@demouni.edu / Admin123!");
  console.log("  Student: student@demo.edu   / Admin123!");
  console.log("────────────────────────────────────────────");
}

main()
  .catch((e) => {
    console.error("❌ Seeding failed:", e);
    process.exit(1);
  })
  .finally(async () => {
    await prisma.$disconnect();
  });