package db

import (
	"context"
)

func (r *PGRepository) ListEmailTemplates(ctx context.Context, tenantID string) ([]EmailTemplateRecord, error) {
	rows, err := r.pool.Query(ctx, `
		SELECT id, tenant_id, type, subject, body_html, body_text, is_enabled, updated_at
		FROM email_templates
		WHERE tenant_id = $1
		ORDER BY type
	`, tenantID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()

	var records []EmailTemplateRecord
	for rows.Next() {
		var rec EmailTemplateRecord
		if err := rows.Scan(&rec.ID, &rec.TenantID, &rec.Type, &rec.Subject, &rec.BodyHTML, &rec.BodyText, &rec.IsEnabled, &rec.UpdatedAt); err != nil {
			return nil, err
		}
		records = append(records, rec)
	}
	return records, rows.Err()
}

func (r *PGRepository) GetEmailTemplate(ctx context.Context, tenantID string, templateType string) (EmailTemplateRecord, error) {
	var rec EmailTemplateRecord
	err := r.pool.QueryRow(ctx, `
		SELECT id, tenant_id, type, subject, body_html, body_text, is_enabled, updated_at
		FROM email_templates
		WHERE tenant_id = $1 AND type = $2
	`, tenantID, templateType).Scan(&rec.ID, &rec.TenantID, &rec.Type, &rec.Subject, &rec.BodyHTML, &rec.BodyText, &rec.IsEnabled, &rec.UpdatedAt)
	return rec, err
}

func (r *PGRepository) UpsertEmailTemplate(ctx context.Context, params EmailTemplateRecord) (EmailTemplateRecord, error) {
	var rec EmailTemplateRecord
	err := r.pool.QueryRow(ctx, `
		INSERT INTO email_templates (tenant_id, type, subject, body_html, body_text, is_enabled)
		VALUES ($1, $2, $3, $4, $5, $6)
		ON CONFLICT (tenant_id, type) DO UPDATE SET
			subject = EXCLUDED.subject,
			body_html = EXCLUDED.body_html,
			body_text = EXCLUDED.body_text,
			is_enabled = EXCLUDED.is_enabled,
			updated_at = now()
		RETURNING id, tenant_id, type, subject, body_html, body_text, is_enabled, updated_at
	`, params.TenantID, params.Type, params.Subject, params.BodyHTML, params.BodyText, params.IsEnabled).Scan(
		&rec.ID, &rec.TenantID, &rec.Type, &rec.Subject, &rec.BodyHTML, &rec.BodyText, &rec.IsEnabled, &rec.UpdatedAt)
	return rec, err
}