package models

// Code generated by xo. DO NOT EDIT.

import (
	"context"
)

// LeaderboardEntry represents a row from 'leaderboard_entry'.
type LeaderboardEntry struct {
	Name      string `json:"name"`       // name
	Points    int    `json:"points"`     // points
	LastValid Time   `json:"last_valid"` // last_valid
}

// Leaderboard runs a custom query, returning results as LeaderboardEntry.
func Leaderboard(ctx context.Context, db DB) ([]*LeaderboardEntry, error) {
	// query
	const sqlstr = `SELECT u.name, ` +
		`COALESCE(SUM(qa.points_awarded), 0) AS points, ` +
		`COALESCE(MAX(qa.submitted_at), u.created_at) as last_valid_submission ` +
		`FROM users u ` +
		`LEFT JOIN question_attempt qa ON u.id = qa.user_id AND qa.correct ` +
		`GROUP BY u.id ` +
		`ORDER BY COALESCE(SUM(qa.points_awarded), 0) DESC, ` +
		`MAX(qa.submitted_at) ASC`
	// run
	logf(sqlstr)
	rows, err := db.QueryContext(ctx, sqlstr)
	if err != nil {
		return nil, logerror(err)
	}
	defer rows.Close()
	// load results
	var res []*LeaderboardEntry
	for rows.Next() {
		var le LeaderboardEntry
		// scan
		if err := rows.Scan(&le.Name, &le.Points, &le.LastValid); err != nil {
			return nil, logerror(err)
		}
		res = append(res, &le)
	}
	if err := rows.Err(); err != nil {
		return nil, logerror(err)
	}
	return res, nil
}