package models

import (
	"context"
	"time"
)

// ChannelMember represents a user's membership in a channel.
type ChannelMember struct {
	Base

	ChannelID string    `json:"channelId"`
	UserID    string    `json:"userId"`
	Modes     string    `json:"modes"`
	JoinedAt  time.Time `json:"joinedAt"`
	Nick      string    `json:"nick"` // denormalized from users table
}

// User returns the full User for this membership.
func (cm *ChannelMember) User(ctx context.Context) (*User, error) {
	u := &User{}
	u.SetDB(cm.db)

	err := cm.GetDB().QueryRowContext(ctx, `
		SELECT id, nick, password_hash, created_at, updated_at, last_seen_at
		FROM users WHERE id = ?`,
		cm.UserID,
	).Scan(
		&u.ID, &u.Nick, &u.PasswordHash,
		&u.CreatedAt, &u.UpdatedAt, &u.LastSeenAt,
	)
	if err != nil {
		return nil, err
	}

	return u, nil
}

// Channel returns the full Channel for this membership.
func (cm *ChannelMember) Channel(ctx context.Context) (*Channel, error) {
	c := &Channel{}
	c.SetDB(cm.db)

	err := cm.GetDB().QueryRowContext(ctx, `
		SELECT id, name, topic, modes, created_at, updated_at
		FROM channels WHERE id = ?`,
		cm.ChannelID,
	).Scan(
		&c.ID, &c.Name, &c.Topic, &c.Modes,
		&c.CreatedAt, &c.UpdatedAt,
	)
	if err != nil {
		return nil, err
	}

	return c, nil
}