Shatteredvoid/src/database/migrations/007_research_system.js

/**
 * Research System Migration
 * Creates tables for the technology tree and research system
 */

exports.up = async function(knex) {
  console.log('Creating research system tables...');

  // Technology tree table
  await knex.schema.createTable('technologies', (table) => {
    table.increments('id').primary();
    table.string('name', 100).unique().notNullable();
    table.text('description');
    table.string('category', 50).notNullable(); // 'military', 'industrial', 'social', 'exploration'
    table.integer('tier').notNullable().defaultTo(1);
    table.jsonb('prerequisites'); // Array of required technology IDs
    table.jsonb('research_cost').notNullable(); // Resource costs
    table.integer('research_time').notNullable(); // In minutes
    table.jsonb('effects'); // Bonuses, unlocks, etc.
    table.boolean('is_active').defaultTo(true);
    table.timestamp('created_at').defaultTo(knex.fn.now());

    table.index(['category']);
    table.index(['tier']);
    table.index(['is_active']);
  });

  // Player research progress table
  await knex.schema.createTable('player_research', (table) => {
    table.increments('id').primary();
    table.integer('player_id').notNullable().references('id').inTable('players').onDelete('CASCADE');
    table.integer('technology_id').notNullable().references('id').inTable('technologies');
    table.string('status', 20).defaultTo('available').checkIn(['unavailable', 'available', 'researching', 'completed']);
    table.integer('progress').defaultTo(0);
    table.timestamp('started_at');
    table.timestamp('completed_at');
    table.unique(['player_id', 'technology_id']);

    table.index(['player_id']);
    table.index(['status']);
    table.index(['player_id', 'status']);
  });

  // Research facilities table (already exists but let's ensure it has proper constraints)
  const hasResearchFacilities = await knex.schema.hasTable('research_facilities');
  if (!hasResearchFacilities) {
    await knex.schema.createTable('research_facilities', (table) => {
      table.increments('id').primary();
      table.integer('colony_id').notNullable().references('id').inTable('colonies').onDelete('CASCADE');
      table.string('name', 100).notNullable();
      table.string('facility_type', 50).notNullable();
      table.decimal('research_bonus', 3, 2).defaultTo(1.0); // Multiplier for research speed
      table.jsonb('specialization'); // Categories this facility is good at
      table.boolean('is_active').defaultTo(true);
      table.timestamp('created_at').defaultTo(knex.fn.now());

      table.index(['colony_id']);
      table.index(['is_active']);
    });
  }

  // Add missing indexes to existing tables if they don't exist
  const hasPlayerResourcesIndex = await knex.schema.hasTable('player_resources');
  if (hasPlayerResourcesIndex) {
    // Check if index exists before creating
    try {
      await knex.schema.table('player_resources', (table) => {
        table.index(['player_id'], 'idx_player_resources_player_id');
      });
    } catch (e) {
      // Index likely already exists, ignore
      console.log('Player resources index already exists or error creating it');
    }
  }

  console.log('Research system tables created successfully');
};

exports.down = async function(knex) {
  await knex.schema.dropTableIfExists('player_research');
  await knex.schema.dropTableIfExists('technologies');
  // Don't drop research_facilities as it might be used by other systems
};