package environment

import (
	"context"
	"encoding/json"
	"fmt"
)

// CreateStandaloneEnv creates only a browser environment; no social account or
// login profile exists until the browser's first verified login.
func (s *Store) CreateStandaloneEnv(ctx context.Context, gateway string, fingerprint Fingerprint) (EnvironmentContext, error) {
	if !gatewayNamePattern.MatchString(gateway) || fingerprint.Seed != 0 || fingerprint.ProxyServer != "" || fingerprint.Validate() != nil {
		return EnvironmentContext{}, ErrInvalid
	}
	alias := "env-" + newHubID()
	encoded, err := json.Marshal(fingerprint)
	if err != nil {
		return EnvironmentContext{}, fmt.Errorf("encode browser fingerprint: %w", err)
	}
	if err := s.db.QueryRowContext(ctx, `INSERT INTO browser_env(alias,name,gateway_id,fingerprint,profile_id) SELECT $1,$1,id,jsonb_set($3::jsonb,'{seed}',to_jsonb(nextval('browser_fingerprint_seed_seq'))),$1 FROM gateway WHERE name=$2 RETURNING alias`, alias, gateway, encoded).Scan(&alias); err != nil {
		return EnvironmentContext{}, rowError(err)
	}
	return s.GetEnvironmentContext(ctx, alias)
}

func (s *Store) ListPendingEnvironments(ctx context.Context) ([]EnvironmentContext, error) {
	rows, err := s.db.QueryContext(ctx, `SELECT alias FROM browser_env WHERE account_id IS NULL ORDER BY id DESC`)
	if err != nil {
		return nil, fmt.Errorf("list pending browser environments: %w", err)
	}
	aliases := []string{}
	for rows.Next() {
		var alias string
		if err := rows.Scan(&alias); err != nil {
			rows.Close()
			return nil, err
		}
		aliases = append(aliases, alias)
	}
	err = rows.Err()
	rows.Close()
	if err != nil {
		return nil, err
	}
	result := make([]EnvironmentContext, 0, len(aliases))
	for _, alias := range aliases {
		env, err := s.GetEnvironmentContext(ctx, alias)
		if err != nil {
			return nil, err
		}
		result = append(result, env)
	}
	return result, nil
}