import {
  PrismaClient,
  TaskStatus,
  TaskPriority,
  ProjectStatus,
  WorkspaceMemberRole,
} from "@prisma/client";

const prisma = new PrismaClient();

async function main() {
  console.log("Seeding database...");

  // IMPORTANT: This seed script should not be run concurrently
  // If running in CI/CD, ensure serialization of seed operations
  // to prevent race conditions and data corruption

  // Create test user
  const user = await prisma.user.upsert({
    where: { email: "dev@mosaic.local" },
    update: {},
    create: {
      email: "dev@mosaic.local",
      name: "Development User",
      preferences: {
        theme: "system",
        notifications: true,
      },
    },
  });

  console.log(`Created user: ${user.email}`);

  // Create workspace
  const workspace = await prisma.workspace.upsert({
    where: { id: "00000000-0000-0000-0000-000000000001" },
    update: {},
    create: {
      id: "00000000-0000-0000-0000-000000000001",
      name: "Development Workspace",
      ownerId: user.id,
      settings: {
        timezone: "America/New_York",
      },
    },
  });

  console.log(`Created workspace: ${workspace.name}`);

  // Add user as workspace owner
  await prisma.workspaceMember.upsert({
    where: {
      workspaceId_userId: {
        workspaceId: workspace.id,
        userId: user.id,
      },
    },
    update: {},
    create: {
      workspaceId: workspace.id,
      userId: user.id,
      role: WorkspaceMemberRole.OWNER,
    },
  });

  // Use transaction for atomic seed data reset and creation
  await prisma.$transaction(async (tx) => {
    // Delete existing seed data for idempotency (avoids duplicates on re-run)
    await tx.task.deleteMany({ where: { workspaceId: workspace.id } });
    await tx.event.deleteMany({ where: { workspaceId: workspace.id } });
    await tx.project.deleteMany({ where: { workspaceId: workspace.id } });

    // Create sample project
    const project = await tx.project.create({
      data: {
        workspaceId: workspace.id,
        name: "Sample Project",
        description: "A sample project for development",
        status: ProjectStatus.ACTIVE,
        creatorId: user.id,
        color: "#3B82F6",
      },
    });

    console.log(`Created project: ${project.name}`);

    // Create sample tasks
    const tasks = [
      {
        title: "Set up development environment",
        status: TaskStatus.COMPLETED,
        priority: TaskPriority.HIGH,
      },
      {
        title: "Review project requirements",
        status: TaskStatus.IN_PROGRESS,
        priority: TaskPriority.MEDIUM,
      },
      {
        title: "Design database schema",
        status: TaskStatus.COMPLETED,
        priority: TaskPriority.HIGH,
      },
      {
        title: "Implement NestJS integration",
        status: TaskStatus.COMPLETED,
        priority: TaskPriority.HIGH,
      },
      {
        title: "Create seed data",
        status: TaskStatus.IN_PROGRESS,
        priority: TaskPriority.MEDIUM,
      },
    ];

    // Use createMany for batch insertion (better performance)
    await tx.task.createMany({
      data: tasks.map((taskData) => ({
        workspaceId: workspace.id,
        title: taskData.title,
        status: taskData.status,
        priority: taskData.priority,
        creatorId: user.id,
        projectId: project.id,
      })),
    });

    console.log(`Created ${tasks.length} sample tasks`);

    // Create sample event
    const tomorrow = new Date();
    tomorrow.setDate(tomorrow.getDate() + 1);
    tomorrow.setHours(10, 0, 0, 0);

    await tx.event.create({
      data: {
        workspaceId: workspace.id,
        title: "Morning standup",
        description: "Daily team sync",
        startTime: tomorrow,
        endTime: new Date(tomorrow.getTime() + 30 * 60000), // 30 minutes later
        creatorId: user.id,
        projectId: project.id,
      },
    });

    console.log("Created sample event");
  });
  console.log("Seeding completed successfully!");
}

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