249 lines
11 KiB
TypeScript
249 lines
11 KiB
TypeScript
import { eq } from 'drizzle-orm'
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import type { GameDb } from '@/lib/db/client'
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import { persist } from '@/lib/db/client'
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import * as schema from '@/lib/db/schema'
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import { bodyRng, explorationRng, generatePlanets, generateRing, generateStartRegion, mulberry32, rollExploration, type FoundItem } from './world'
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// Save lifecycle: auto-init on first hit, world state reads, and the jump action.
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// Single-player by design — exactly one save row ever exists, so every query below is
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// unscoped (there is nothing to scope against).
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export interface WorldSystemDto {
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id: number
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name: string
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x: number
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y: number
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discovered: boolean
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current: boolean
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}
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export interface WorldState {
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systems: WorldSystemDto[]
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edges: [number, number][] // undirected system-id pairs, deduped + sorted for stable output
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turn: number
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}
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// Carries an HTTP status so route handlers can map failures to responses without re-parsing.
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export class JumpError extends Error {
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constructor(
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public readonly status: number,
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message: string,
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) {
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super(message)
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}
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}
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function newSeed(): string {
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const buf = new Uint32Array(1)
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crypto.getRandomValues(buf)
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return String(buf[0])
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}
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// Deterministic per save+turn: the whole world of a seed is reproducible from (seed, turn).
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function expansionRng(seed: string, turn: number): () => number {
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return mulberry32((Number(seed) + turn * 1_000_003) >>> 0)
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}
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// Inserts one system together with its generated bodies (planets + moons), so a system is
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// never left without worlds to explore. Bodies derive from (seed, system id) via bodyRng —
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// independent of generation order and every other system.
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async function insertSystemWithBodies(db: GameDb, saveId: number, ws: { name: string; x: number; y: number }, seed: string): Promise<number> {
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const [row] = await db.db.insert(schema.solarSystems).values({ saveId, name: ws.name, x: ws.x, y: ws.y }).returning({ id: schema.solarSystems.id })
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for (const body of generatePlanets(bodyRng(seed, row.id))) {
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const [planet] = await db.db.insert(schema.planets).values({ systemId: row.id, parentId: null, name: body.name, type: body.type, hazard: body.hazard }).returning({ id: schema.planets.id })
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for (const moon of body.moons) {
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await db.db.insert(schema.planets).values({ systemId: row.id, parentId: planet.id, name: moon.name, type: moon.type, hazard: moon.hazard })
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}
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}
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return row.id
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}
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async function insertRoutes(db: GameDb, edges: [number, number][], resolve: (index: number) => number): Promise<void> {
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for (const [a, b] of edges) {
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const from = resolve(a)
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const to = resolve(b)
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await db.db.insert(schema.jumpRoutes).values({ fromSystem: from, toSystem: to })
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await db.db.insert(schema.jumpRoutes).values({ fromSystem: to, toSystem: from }) // both directions → adjacency is a single-row lookup
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}
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}
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// Creates the save + starting region when the DB has none. No-op otherwise — safe to call
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// on every request (single player, one process: check-then-insert cannot race in practice).
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export async function ensureSave(db: GameDb): Promise<void> {
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const existing = await db.db.select().from(schema.saves).limit(1)
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if (existing.length > 0) return
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const seed = newSeed()
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const region = generateStartRegion(mulberry32(Number(seed)))
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const nowIso = new Date().toISOString()
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const [save] = await db.db.insert(schema.saves).values({ seed, turn: 0, createdAt: nowIso }).returning()
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// All inserted as undiscovered first; the start is then marked discovered + current.
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const startId = await insertSystemWithBodies(db, save.id, region.start, seed)
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const neighborIds: number[] = []
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for (const n of region.neighbors) neighborIds.push(await insertSystemWithBodies(db, save.id, n, seed))
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await db.db.update(schema.solarSystems).set({ discovered: true, isCurrent: true }).where(eq(schema.solarSystems.id, startId))
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const resolve = (index: number) => (index === 0 ? startId : neighborIds[index - 1])
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await insertRoutes(db, region.edges, resolve)
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await db.db.insert(schema.events).values({ saveId: save.id, turn: 0, type: 'new_game', message: `New game — seed ${seed}, starting system ${region.start.name}`, createdAt: nowIso })
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await persist(db)
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}
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export async function getWorldState(db: GameDb): Promise<WorldState> {
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await ensureSave(db)
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const [save] = await db.db.select().from(schema.saves).limit(1)
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const systems = await db.db.select().from(schema.solarSystems)
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const routes = await db.db.select().from(schema.jumpRoutes)
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// Dedupe the stored directed pairs into sorted undirected edges.
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const seen = new Set<string>()
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const edges: [number, number][] = []
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for (const r of routes) {
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const a = Math.min(r.fromSystem, r.toSystem)
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const b = Math.max(r.fromSystem, r.toSystem)
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const key = `${a}-${b}`
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if (!seen.has(key)) {
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seen.add(key)
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edges.push([a, b])
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}
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}
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return {
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systems: systems.map((s) => ({ id: s.id, name: s.name, x: s.x, y: s.y, discovered: s.discovered, current: s.isCurrent })),
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edges,
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turn: save.turn,
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}
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}
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export async function jumpToSystem(db: GameDb, systemId: number): Promise<WorldState> {
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await ensureSave(db)
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const [save] = await db.db.select().from(schema.saves).limit(1)
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const systems = await db.db.select().from(schema.solarSystems)
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const target = systems.find((s) => s.id === systemId)
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if (!target) throw new JumpError(404, `Unknown system ${systemId}`)
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const current = systems.find((s) => s.isCurrent)!
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if (current.id === target.id) throw new JumpError(409, 'Already at this system')
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const routes = await db.db.select().from(schema.jumpRoutes)
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const adjacent = routes.some((r) => r.fromSystem === current.id && r.toSystem === target.id)
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if (!adjacent) throw new JumpError(409, `${target.name} is not reachable from ${current.name}`)
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const turn = save.turn + 1
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await db.db.update(schema.solarSystems).set({ isCurrent: false }).where(eq(schema.solarSystems.id, current.id))
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await db.db.update(schema.solarSystems).set({ isCurrent: true, discovered: true }).where(eq(schema.solarSystems.id, target.id))
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if (!target.discovered) {
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// Growing the chart: a ring of new (undiscovered) neighbours around the newly reached
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// system, so there is always somewhere to jump next and a route back.
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const rng = expansionRng(save.seed, turn)
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const takenNames = new Set(systems.map((s) => s.name))
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const ring = generateRing(rng, target.x, target.y, takenNames, systems)
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const ringIds: number[] = []
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for (const s of ring.systems) ringIds.push(await insertSystemWithBodies(db, save.id, s, save.seed))
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const resolve = (index: number) => (index === 0 ? target.id : ringIds[index - 1])
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await insertRoutes(db, ring.edges, resolve)
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}
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await db.db.update(schema.saves).set({ turn }).where(eq(schema.saves.id, save.id))
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await db.db.insert(schema.events).values({ saveId: save.id, turn, type: 'jump', message: `Jumped to ${target.name}`, createdAt: new Date().toISOString() })
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await persist(db)
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return getWorldState(db)
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}
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// --- Local system + exploration ---------------------------------------------
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export interface PlanetDto {
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id: number
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name: string
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type: string
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hazard: boolean
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explored: boolean
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parent: number | null // NULL for a planet, the parent planet's id for a moon
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}
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export interface InventoryItemDto {
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kind: 'resource' | 'part'
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name: string
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qty: number
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}
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export interface SystemState {
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systemId: number
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systemName: string
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planets: PlanetDto[] // insertion order = display order (a moon follows its parent row)
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inventory: InventoryItemDto[]
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turn: number
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}
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// Carries an HTTP status so route handlers can map failures to responses without re-parsing.
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export class ExploreError extends Error {
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constructor(
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public readonly status: number,
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message: string,
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) {
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super(message)
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}
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}
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async function readSystemState(db: GameDb): Promise<SystemState> {
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const [save] = await db.db.select().from(schema.saves).limit(1)
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const systems = await db.db.select().from(schema.solarSystems)
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const current = systems.find((s) => s.isCurrent)!
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const planets = (await db.db.select().from(schema.planets).where(eq(schema.planets.systemId, current.id))).map((p) => ({
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id: p.id,
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name: p.name,
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type: p.type,
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hazard: p.hazard,
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explored: p.explored,
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parent: p.parentId,
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}))
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const inventory = (await db.db.select().from(schema.inventoryItems)).map((i) => ({ kind: i.kind as 'resource' | 'part', name: i.name, qty: i.qty }))
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return { systemId: current.id, systemName: current.name, planets, inventory, turn: save.turn }
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}
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export async function getSystemState(db: GameDb): Promise<SystemState> {
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await ensureSave(db)
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return readSystemState(db)
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}
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export interface ExploreResult extends SystemState {
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outcome: FoundItem[] // what this scan found (may be empty — some scans find nothing)
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}
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// Scan one body of the save: deterministic haul from (seed, planet id), marks it explored,
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// costs a turn, accumulates finds into inventory and writes an event. Any existing planet
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// may be scanned (the UI only offers the current system's rows).
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export async function explorePlanet(db: GameDb, planetId: number): Promise<ExploreResult> {
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await ensureSave(db)
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const [save] = await db.db.select().from(schema.saves).limit(1)
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const planets = await db.db.select().from(schema.planets)
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const target = planets.find((p) => p.id === planetId)
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if (!target) throw new ExploreError(404, `Unknown planet ${planetId}`)
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if (target.explored) throw new ExploreError(409, `${target.name} was already explored`)
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const outcome = rollExploration(explorationRng(save.seed, target.id))
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const turn = save.turn + 1
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await db.db.update(schema.planets).set({ explored: true }).where(eq(schema.planets.id, target.id))
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for (const item of outcome) {
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// Accumulate: the same kind+name on this save bumps qty instead of adding a row.
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const existing = (await db.db.select().from(schema.inventoryItems)).find((i) => i.kind === item.kind && i.name === item.name)
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if (existing) {
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await db.db.update(schema.inventoryItems).set({ qty: existing.qty + item.qty }).where(eq(schema.inventoryItems.id, existing.id))
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} else {
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await db.db.insert(schema.inventoryItems).values({ saveId: save.id, kind: item.kind, name: item.name, qty: item.qty })
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}
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}
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const foundText = outcome.length > 0 ? outcome.map((i) => `${i.qty}× ${i.name}`).join(', ') : 'nothing'
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await db.db.update(schema.saves).set({ turn }).where(eq(schema.saves.id, save.id))
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await db.db.insert(schema.events).values({ saveId: save.id, turn, type: 'explore', message: `Explored ${target.name} — found ${foundText}`, createdAt: new Date().toISOString() })
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await persist(db)
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return { ...(await readSystemState(db)), outcome }
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}
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