-- Migration: Add documents table for linking validated PDFs to declarations
-- Version: 2.1.0
-- Date: 2025-01-06

-- Create table for linking documents to declarations
CREATE TABLE IF NOT EXISTS `llx_declarationtva_documents` (
  `rowid` int(11) NOT NULL AUTO_INCREMENT,
  `declaration_id` int(11) NOT NULL,
  `document_id` int(11) NOT NULL,
  `created_date` datetime NOT NULL,
  `entity` int(11) NOT NULL DEFAULT 1,
  PRIMARY KEY (`rowid`),
  KEY `idx_declaration_id` (`declaration_id`),
  KEY `idx_document_id` (`document_id`),
  KEY `idx_entity` (`entity`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- Add validated_date and validated_by columns to declarations table if they don't exist
-- Check if validated_date column exists first
SET @sql = (SELECT IF(
    (SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS 
     WHERE TABLE_SCHEMA = DATABASE() 
     AND TABLE_NAME = 'llx_declarationtva_declarations' 
     AND COLUMN_NAME = 'validated_date') = 0,
    'ALTER TABLE `llx_declarationtva_declarations` ADD COLUMN `validated_date` datetime DEFAULT NULL',
    'SELECT "validated_date column already exists" as message'
));
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

-- Check if validated_by column exists first
SET @sql = (SELECT IF(
    (SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS 
     WHERE TABLE_SCHEMA = DATABASE() 
     AND TABLE_NAME = 'llx_declarationtva_declarations' 
     AND COLUMN_NAME = 'validated_by') = 0,
    'ALTER TABLE `llx_declarationtva_declarations` ADD COLUMN `validated_by` int(11) DEFAULT NULL',
    'SELECT "validated_by column already exists" as message'
));
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

-- Add indexes for performance (only if they don't exist)
SET @sql = (SELECT IF(
    (SELECT COUNT(*) FROM INFORMATION_SCHEMA.STATISTICS 
     WHERE TABLE_SCHEMA = DATABASE() 
     AND TABLE_NAME = 'llx_declarationtva_declarations' 
     AND INDEX_NAME = 'idx_validated_date') = 0,
    'ALTER TABLE `llx_declarationtva_declarations` ADD INDEX `idx_validated_date` (`validated_date`)',
    'SELECT "idx_validated_date index already exists" as message'
));
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

SET @sql = (SELECT IF(
    (SELECT COUNT(*) FROM INFORMATION_SCHEMA.STATISTICS 
     WHERE TABLE_SCHEMA = DATABASE() 
     AND TABLE_NAME = 'llx_declarationtva_declarations' 
     AND INDEX_NAME = 'idx_validated_by') = 0,
    'ALTER TABLE `llx_declarationtva_declarations` ADD INDEX `idx_validated_by` (`validated_by`)',
    'SELECT "idx_validated_by index already exists" as message'
));
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;