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package behavior
import (
"fmt"
"math/rand"
"os"
"path/filepath"
"strings"
"sync"
"gopkg.in/yaml.v3"
)
func BuildPathIndex(dir string) map[string]string {
index := make(map[string]string)
filepath.WalkDir(dir, func(path string, d os.DirEntry, err error) error {
if err != nil || d.IsDir() || !strings.HasSuffix(d.Name(), ".yaml") {
return nil
}
id := strings.TrimSuffix(d.Name(), ".yaml")
index[id] = path
return nil
})
return index
}
func BuildRoomIndex(dir string) map[int]string {
index := make(map[int]string)
filepath.WalkDir(dir, func(path string, d os.DirEntry, err error) error {
if err != nil || d.IsDir() || !strings.HasSuffix(d.Name(), ".yaml") {
return nil
}
id := strings.TrimSuffix(d.Name(), ".yaml")
var n int
if _, scanErr := fmt.Sscanf(id, "%d", &n); scanErr == nil {
index[n] = path
}
return nil
})
return index
}
func WalkYAMLDir(dir string, fn func(path, id string, data []byte) error) error {
return filepath.WalkDir(dir, func(path string, d os.DirEntry, err error) error {
if err != nil || d.IsDir() || !strings.HasSuffix(d.Name(), ".yaml") {
return nil
}
data, readErr := os.ReadFile(path)
if readErr != nil {
return nil
}
id := strings.TrimSuffix(d.Name(), ".yaml")
return fn(path, id, data)
})
}
type Duplicate struct {
ID string
Paths []string
}
func CheckDuplicateIDs(dir string) []Duplicate {
seen := make(map[string][]string)
filepath.WalkDir(dir, func(path string, d os.DirEntry, err error) error {
if err != nil || d.IsDir() || !strings.HasSuffix(d.Name(), ".yaml") {
return nil
}
id := strings.TrimSuffix(d.Name(), ".yaml")
seen[id] = append(seen[id], path)
return nil
})
var dups []Duplicate
for id, paths := range seen {
if len(paths) > 1 {
dups = append(dups, Duplicate{ID: id, Paths: paths})
}
}
return dups
}
func SuccessChance(cfg SuccessFormula, level int, requiredLevel int) float64 {
chance := cfg.Base + float64(level-requiredLevel)*cfg.PerLevel
if chance > cfg.Cap {
chance = cfg.Cap
}
if chance < 0 {
chance = 0
}
return chance
}
var (
dropIndex map[string]string
dropIndexMu sync.Mutex
)
func loadDropIndex(dataDir string) map[string]string {
dropIndexMu.Lock()
defer dropIndexMu.Unlock()
if dropIndex == nil {
dropIndex = BuildPathIndex(filepath.Join(dataDir, "drops"))
}
return dropIndex
}
func ClearDropIndex() {
dropIndexMu.Lock()
defer dropIndexMu.Unlock()
dropIndex = nil
}
func LoadDropTable(dataDir, id string) (*DropTableDef, error) {
index := loadDropIndex(dataDir)
path, ok := index[id]
if !ok {
path = filepath.Join(dataDir, "drops", id+".yaml")
}
data, err := os.ReadFile(path)
if err != nil {
return nil, fmt.Errorf("read drop table %s: %w", id, err)
}
var dt DropTableDef
if err := yaml.Unmarshal(data, &dt); err != nil {
return nil, fmt.Errorf("parse drop table %s: %w", id, err)
}
return &dt, nil
}
// pickWeighted returns a single entry chosen by weight, without resolving any
// table reference on it. Returns nil if the list is empty or has no weight.
func pickWeighted(drops []DropEntry) *DropEntry {
if len(drops) == 0 {
return nil
}
total := 0
for _, d := range drops {
total += d.Weight
}
if total <= 0 {
return nil
}
roll := rand.Intn(total)
cumulative := 0
for i := range drops {
cumulative += drops[i].Weight
if roll < cumulative {
return &drops[i]
}
}
return &drops[0]
}
func ResolveDrop(dataDir string, drops []DropEntry) *DropEntry {
picked := pickWeighted(drops)
if picked == nil {
return nil
}
if picked.Table != "" {
sub, err := LoadDropTable(dataDir, picked.Table)
if err != nil {
return nil
}
resolved := ResolveDrop(dataDir, sub.Drops)
if resolved == nil {
return nil
}
qty := picked.Quantity
if qty <= 0 {
qty = resolved.Quantity
}
if qty <= 0 {
qty = 1
}
return &DropEntry{
ItemID: resolved.ItemID,
Quantity: qty,
Depletes: picked.Depletes,
SuccessMessage: picked.SuccessMessage,
}
}
return picked
}
// ResolveDropList performs one weighted pick from drops. A plain item entry
// yields a single result. When the picked entry references a sub-table, its
// Quantity is treated as the number of INDEPENDENT rolls against that sub-table
// (default 1) — each roll may produce a different item — and all results are
// returned. Tables are just weighted lists of items; this is skill-independent.
func ResolveDropList(dataDir string, drops []DropEntry) []DropEntry {
picked := pickWeighted(drops)
if picked == nil {
return nil
}
if picked.Table == "" {
return []DropEntry{*picked}
}
sub, err := LoadDropTable(dataDir, picked.Table)
if err != nil {
return nil
}
rolls := picked.Quantity
if rolls <= 0 {
rolls = 1
}
var out []DropEntry
for i := 0; i < rolls; i++ {
if resolved := ResolveDrop(dataDir, sub.Drops); resolved != nil && resolved.ItemID != "" {
out = append(out, *resolved)
}
}
return out
}
|
