#!/usr/bin/env node

/**
 * Media Library Database Test Script
 * Tests all database operations for uploads and folders
 */

const { pool } = require("./config/database");
const logger = require("./config/logger");

async function testDatabaseOperations() {
  console.log("\n🧪 Testing Media Library Database Operations\n");
  console.log("=".repeat(60));

  try {
    // Test 1: Check database connection
    console.log("\n1️⃣  Testing Database Connection...");
    const connectionTest = await pool.query("SELECT NOW()");
    console.log("   ✅ Database connected:", connectionTest.rows[0].now);

    // Test 2: Check uploads table structure
    console.log("\n2️⃣  Checking uploads table structure...");
    const uploadsSchema = await pool.query(`
      SELECT column_name, data_type, is_nullable 
      FROM information_schema.columns 
      WHERE table_name = 'uploads' 
      ORDER BY ordinal_position
    `);
    console.log("   ✅ Uploads table columns:");
    uploadsSchema.rows.forEach((col) => {
      console.log(
        `      - ${col.column_name} (${col.data_type}, nullable: ${col.is_nullable})`
      );
    });

    // Test 3: Check media_folders table structure
    console.log("\n3️⃣  Checking media_folders table structure...");
    const foldersSchema = await pool.query(`
      SELECT column_name, data_type, is_nullable 
      FROM information_schema.columns 
      WHERE table_name = 'media_folders' 
      ORDER BY ordinal_position
    `);
    console.log("   ✅ Media folders table columns:");
    foldersSchema.rows.forEach((col) => {
      console.log(
        `      - ${col.column_name} (${col.data_type}, nullable: ${col.is_nullable})`
      );
    });

    // Test 4: Check foreign key constraints
    console.log("\n4️⃣  Checking foreign key constraints...");
    const constraints = await pool.query(`
      SELECT
        tc.constraint_name,
        tc.table_name,
        kcu.column_name,
        ccu.table_name AS foreign_table_name,
        ccu.column_name AS foreign_column_name
      FROM information_schema.table_constraints AS tc
      JOIN information_schema.key_column_usage AS kcu
        ON tc.constraint_name = kcu.constraint_name
        AND tc.table_schema = kcu.table_schema
      JOIN information_schema.constraint_column_usage AS ccu
        ON ccu.constraint_name = tc.constraint_name
        AND ccu.table_schema = tc.table_schema
      WHERE tc.constraint_type = 'FOREIGN KEY'
        AND tc.table_name IN ('uploads', 'media_folders')
    `);
    console.log("   ✅ Foreign key constraints:");
    constraints.rows.forEach((fk) => {
      console.log(
        `      - ${fk.table_name}.${fk.column_name} → ${fk.foreign_table_name}.${fk.foreign_column_name}`
      );
    });

    // Test 5: Count existing data
    console.log("\n5️⃣  Counting existing data...");
    const fileCount = await pool.query("SELECT COUNT(*) as count FROM uploads");
    const folderCount = await pool.query(
      "SELECT COUNT(*) as count FROM media_folders"
    );
    console.log(`   ✅ Total files: ${fileCount.rows[0].count}`);
    console.log(`   ✅ Total folders: ${folderCount.rows[0].count}`);

    // Test 6: List all files
    if (parseInt(fileCount.rows[0].count) > 0) {
      console.log("\n6️⃣  Listing all files in database...");
      const files = await pool.query(`
        SELECT id, original_name, file_size, folder_id, uploaded_by, created_at 
        FROM uploads 
        ORDER BY created_at DESC 
        LIMIT 10
      `);
      console.log("   ✅ Recent files:");
      files.rows.forEach((file) => {
        const size = (file.file_size / 1024).toFixed(2) + " KB";
        const folder = file.folder_id ? `Folder #${file.folder_id}` : "Root";
        console.log(
          `      - [ID: ${file.id}] ${file.original_name} (${size}) - ${folder}`
        );
      });
    }

    // Test 7: List all folders
    if (parseInt(folderCount.rows[0].count) > 0) {
      console.log("\n7️⃣  Listing all folders in database...");
      const folders = await pool.query(`
        SELECT id, name, parent_id, created_by, created_at,
               (SELECT COUNT(*) FROM uploads WHERE folder_id = media_folders.id) as file_count
        FROM media_folders 
        ORDER BY created_at DESC
      `);
      console.log("   ✅ Folders:");
      folders.rows.forEach((folder) => {
        const parent = folder.parent_id
          ? `Parent #${folder.parent_id}`
          : "Root";
        console.log(
          `      - [ID: ${folder.id}] ${folder.name} (${folder.file_count} files) - ${parent}`
        );
      });
    }

    // Test 8: Test folder query with file counts
    console.log("\n8️⃣  Testing folder query with file counts...");
    const foldersWithCounts = await pool.query(`
      SELECT 
        mf.*,
        COUNT(u.id) as file_count
      FROM media_folders mf
      LEFT JOIN uploads u ON u.folder_id = mf.id
      GROUP BY mf.id
      ORDER BY mf.created_at DESC
    `);
    console.log(
      `   ✅ Query returned ${foldersWithCounts.rows.length} folders with accurate file counts`
    );

    // Test 9: Test cascade delete (dry run)
    console.log("\n9️⃣  Testing cascade delete rules...");
    const cascadeRules = await pool.query(`
      SELECT
        tc.constraint_name,
        rc.delete_rule
      FROM information_schema.table_constraints tc
      JOIN information_schema.referential_constraints rc
        ON tc.constraint_name = rc.constraint_name
      WHERE tc.table_name IN ('uploads', 'media_folders')
        AND tc.constraint_type = 'FOREIGN KEY'
    `);
    console.log("   ✅ Delete rules:");
    cascadeRules.rows.forEach((rule) => {
      console.log(`      - ${rule.constraint_name}: ${rule.delete_rule}`);
    });

    // Test 10: Verify indexes
    console.log("\n🔟  Checking database indexes...");
    const indexes = await pool.query(`
      SELECT
        tablename,
        indexname,
        indexdef
      FROM pg_indexes
      WHERE tablename IN ('uploads', 'media_folders')
        AND schemaname = 'public'
      ORDER BY tablename, indexname
    `);
    console.log("   ✅ Indexes:");
    indexes.rows.forEach((idx) => {
      console.log(`      - ${idx.tablename}.${idx.indexname}`);
    });

    console.log("\n" + "=".repeat(60));
    console.log("✅ All database tests passed successfully!\n");

    console.log("📊 Summary:");
    console.log(`   - Database: Connected and operational`);
    console.log(
      `   - Tables: uploads (${uploadsSchema.rows.length} columns), media_folders (${foldersSchema.rows.length} columns)`
    );
    console.log(
      `   - Data: ${fileCount.rows[0].count} files, ${folderCount.rows[0].count} folders`
    );
    console.log(
      `   - Constraints: ${constraints.rows.length} foreign keys configured`
    );
    console.log(`   - Indexes: ${indexes.rows.length} indexes for performance`);
    console.log(
      "\n✅ Media library database is properly configured and operational!\n"
    );
  } catch (error) {
    console.error("\n❌ Database test failed:", error.message);
    console.error("Stack trace:", error.stack);
    process.exit(1);
  } finally {
    await pool.end();
  }
}

// Run tests
testDatabaseOperations();