import { integer, primaryKey, real, sqliteTable, text, uniqueIndex } from 'drizzle-orm/sqlite-core'

// Drizzle schema for game state. Single-player by design: exactly ONE save row ever exists
// (no auth/accounts), so every table hangs off saves.id but only one save is in play.
// Column names/types here are the source of truth; matching CREATE TABLE statements live
// in lib/db/client.ts (DDL) and must stay in sync with this file.

export const saves = sqliteTable('saves', {
  id: integer('id').primaryKey({ autoIncrement: true }),
  // Seed for the deterministic world generator — same seed always regenerates the same world.
  seed: text('seed').notNull(),
  turn: integer('turn').notNull().default(0),
  createdAt: text('created_at').notNull(),
  // Which schema version this save was last brought up to (NULL on saves from before the
  // column existed = v1). ensureSave runs ordered idempotent backfill steps for anything below.
  schemaVersion: integer('schema_version'),
})

export const solarSystems = sqliteTable('solar_systems', {
  id: integer('id').primaryKey({ autoIncrement: true }),
  saveId: integer('save_id').notNull().references(() => saves.id),
  name: text('name').notNull(),
  // 0–100 coordinate space, rendered directly by the NodeGraph component.
  x: real('x').notNull(),
  y: real('y').notNull(),
  discovered: integer('discovered', { mode: 'boolean' }).notNull().default(false),
  isCurrent: integer('is_current', { mode: 'boolean' }).notNull().default(false),
})

// Jump routes, stored as directed pairs (both directions of each route) so adjacency and
// "reachable from current" are single-row lookups. Read side dedupes for display.
export const jumpRoutes = sqliteTable(
  'jump_routes',
  {
    fromSystem: integer('from_system').notNull().references(() => solarSystems.id),
    toSystem: integer('to_system').notNull().references(() => solarSystems.id),
  },
  (t) => [primaryKey({ columns: [t.fromSystem, t.toSystem] })],
)

// Bodies of a solar system: planets (parent_id NULL) and moons (parent_id = their planet's
// id). Generated when the system is generated, so every system has 2–5 planets, some with
// 1–3 moons. Insertion order is display order — a moon always follows its parent row.
export const planets = sqliteTable('planets', {
  id: integer('id').primaryKey({ autoIncrement: true }),
  systemId: integer('system_id').notNull().references(() => solarSystems.id),
  parentId: integer('parent_id'), // NULL for a planet, set for a moon
  name: text('name').notNull(),
  type: text('type').notNull(),
  hazard: integer('hazard', { mode: 'boolean' }).notNull().default(false),
  explored: integer('explored', { mode: 'boolean' }).notNull().default(false),
})

// Dumb-simple cargo hold on the save: what exploration has found so far. SHIP SYSTEMS (#8)
// will spend parts from here later; nothing consumes it yet.
export const inventoryItems = sqliteTable('inventory_items', {
  id: integer('id').primaryKey({ autoIncrement: true }),
  saveId: integer('save_id').notNull().references(() => saves.id),
  kind: text('kind').notNull(), // 'resource' | 'part'
  name: text('name').notNull(),
  qty: integer('qty').notNull().default(1),
})

// The ship's crew roster: the starting crew (seeded on new game) plus members found while
// exploring planets/moons. Display-only for now — no dismiss/assign actions yet (#7 scope).
export const crew = sqliteTable('crew', {
  id: integer('id').primaryKey({ autoIncrement: true }),
  saveId: integer('save_id').notNull().references(() => saves.id),
  name: text('name').notNull(),
  role: text('role').notNull(),
  traitGood: text('trait_good').notNull(),
  traitBad: text('trait_bad').notNull(),
  // Where the member came from: 'STARTING CREW' or '<planet>, <system>' for found members.
  origin: text('origin').notNull(),
})

// The ship's systems, one row per known type (see SHIP_TYPES in lib/game/ship-costs.ts).
// `built` is derived, not stored: level > 0 means built — unbuilt rows sit at level/capacity 0.
export const shipSystems = sqliteTable(
  'ship_systems',
  {
    id: integer('id').primaryKey({ autoIncrement: true }),
    saveId: integer('save_id').notNull().references(() => saves.id),
    type: text('type').notNull(),
    level: integer('level').notNull().default(0), // 0 = not built yet
    capacity: integer('capacity').notNull().default(0),
  },
  (t) => [uniqueIndex('ship_systems_save_type_unique').on(t.saveId, t.type)],
)

// The technology tree, one row per known tech (see TECHS in lib/game/tech.ts). Definitions are
// seeded from the pure module on new game / backfill v5 — same pattern as ship_systems.
// `researched` is the per-save progress; prerequisites/effect are stored for completeness but
// the canonical semantics live in lib/game/tech.ts (EFFECTS).
export const tech = sqliteTable(
  'tech',
  {
    id: integer('id').primaryKey({ autoIncrement: true }),
    saveId: integer('save_id').notNull().references(() => saves.id),
    slug: text('slug').notNull(), // stable key, e.g. WEAPONS_SYSTEMS
    name: text('name').notNull(), // display name, e.g. 'WEAPONS SYSTEMS'
    costKind: text('cost_kind').notNull(), // 'resource' | 'part'
    costQty: integer('cost_qty').notNull().default(1),
    prerequisites: text('prerequisites').notNull().default(''), // comma-separated tech slugs, '' when none
    effect: text('effect').notNull(), // effect slug — semantics in EFFECTS (lib/game/tech.ts)
    researched: integer('researched', { mode: 'boolean' }).notNull().default(false),
  },
  (t) => [uniqueIndex('tech_save_slug_unique').on(t.saveId, t.slug)],
)

// Append-only game log. Writers so far: new-game + jump events; later issues add more
// writers and a read endpoint.
export const events = sqliteTable('events', {
  id: integer('id').primaryKey({ autoIncrement: true }),
  saveId: integer('save_id').notNull().references(() => saves.id),
  turn: integer('turn').notNull(),
  type: text('type').notNull(),
  message: text('message').notNull(),
  createdAt: text('created_at').notNull(),
})