package main

import (
	"database/sql"
	"log"
	"strings"
)

func runMigrations(database *sql.DB) {
	migrations := []string{
		`ALTER TABLE events ADD COLUMN description TEXT DEFAULT ''`,
		`ALTER TABLE events ADD COLUMN user_id INTEGER REFERENCES users(id)`,
		// Users may have email, phone, or both. Add whichever column is missing.
		`ALTER TABLE users ADD COLUMN phone TEXT UNIQUE`,
		`ALTER TABLE users ADD COLUMN email TEXT UNIQUE`,
		// Verification codes use a generic identifier column.
		`ALTER TABLE verification_codes ADD COLUMN identifier TEXT NOT NULL DEFAULT ''`,
		// Indexes for auth tables (created here so they run after column migrations).
		`CREATE INDEX IF NOT EXISTS idx_sessions_user ON sessions(user_id)`,
		`CREATE INDEX IF NOT EXISTS idx_verification_codes_identifier ON verification_codes(identifier)`,
		// Dedupe RSVPs: keep earliest per (event_id, name).
		`DELETE FROM rsvps WHERE id NOT IN (SELECT MIN(id) FROM rsvps GROUP BY event_id, name COLLATE NOCASE)`,
		// Plus-one tracking for RSVPs.
		`ALTER TABLE rsvps ADD COLUMN plus_one INTEGER NOT NULL DEFAULT 0`,
		// Drop legacy phone/email columns from verification_codes. They were
		// NOT NULL with no default, so inserts using only identifier failed.
		`DROP INDEX IF EXISTS idx_verification_codes_phone`,
		`DROP INDEX IF EXISTS idx_verification_codes_email`,
		`ALTER TABLE verification_codes DROP COLUMN phone`,
		`ALTER TABLE verification_codes DROP COLUMN email`,
		// SMS consent logging for Twilio compliance.
		`CREATE TABLE IF NOT EXISTS sms_consents (
			id         INTEGER PRIMARY KEY AUTOINCREMENT,
			phone      TEXT    NOT NULL,
			ip_address TEXT    NOT NULL DEFAULT '',
			user_agent TEXT    NOT NULL DEFAULT '',
			created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
		)`,
	}
	for _, m := range migrations {
		_, err := database.Exec(m)
		if err != nil {
			if strings.Contains(err.Error(), "duplicate column name") ||
				strings.Contains(err.Error(), "no such column") {
				continue
			}
			log.Printf("migration warning: %v", err)
		}
	}
}