-- Audit Bank Account Balances
-- Run this BEFORE applying balance constraints
-- Fix any inconsistencies found before running 004_balance_constraints.sql

-- Check for negative available balances
SELECT 
    id,
    account_number,
    currency_code,
    balance,
    available_balance,
    reserved_balance,
    'negative_available' as issue_type
FROM bank_accounts
WHERE available_balance < 0
ORDER BY available_balance ASC;

-- Check for negative reserved balances
SELECT 
    id,
    account_number,
    currency_code,
    balance,
    available_balance,
    reserved_balance,
    'negative_reserved' as issue_type
FROM bank_accounts
WHERE reserved_balance < 0
ORDER BY reserved_balance ASC;

-- Check for available > balance
SELECT 
    id,
    account_number,
    currency_code,
    balance,
    available_balance,
    reserved_balance,
    available_balance - balance as excess,
    'available_exceeds_balance' as issue_type
FROM bank_accounts
WHERE available_balance > balance
ORDER BY (available_balance - balance) DESC;

-- Check for (available + reserved) > balance
SELECT 
    id,
    account_number,
    currency_code,
    balance,
    available_balance,
    reserved_balance,
    (available_balance + reserved_balance) - balance as excess,
    'total_exceeds_balance' as issue_type
FROM bank_accounts
WHERE (available_balance + reserved_balance) > balance
ORDER BY ((available_balance + reserved_balance) - balance) DESC;

-- Summary count
SELECT 
    COUNT(*) FILTER (WHERE available_balance < 0) as negative_available_count,
    COUNT(*) FILTER (WHERE reserved_balance < 0) as negative_reserved_count,
    COUNT(*) FILTER (WHERE available_balance > balance) as available_exceeds_balance_count,
    COUNT(*) FILTER (WHERE (available_balance + reserved_balance) > balance) as total_exceeds_balance_count,
    COUNT(*) as total_accounts
FROM bank_accounts;