import { describe, expect, test } from "bun:test"
import { resolveKeybindOption, upsertCommandRegistration } from "./command"

describe("upsertCommandRegistration", () => {
  test("replaces keyed registrations", () => {
    const one = () => [{ id: "one", title: "One" }]
    const two = () => [{ id: "two", title: "Two" }]

    const next = upsertCommandRegistration([{ key: "layout", options: one }], { key: "layout", options: two })

    expect(next).toHaveLength(1)
    expect(next[0]?.options).toBe(two)
  })

  test("keeps unkeyed registrations additive", () => {
    const one = () => [{ id: "one", title: "One" }]
    const two = () => [{ id: "two", title: "Two" }]

    const next = upsertCommandRegistration([{ options: one }], { options: two })

    expect(next).toHaveLength(2)
    expect(next[0]?.options).toBe(two)
    expect(next[1]?.options).toBe(one)
  })
})

describe("resolveKeybindOption", () => {
  test("prefers a matching contextual command over the global fallback", () => {
    const fallback = { id: "tab.close", title: "Close tab" }
    const contextual = { id: "terminal.close", title: "Close terminal", when: () => true }

    expect(resolveKeybindOption([fallback, contextual], new KeyboardEvent("keydown"))).toBe(contextual)
  })

  test("uses the global fallback outside the command context", () => {
    const fallback = { id: "tab.close", title: "Close tab" }
    const contextual = { id: "terminal.close", title: "Close terminal", when: () => false }

    expect(resolveKeybindOption([fallback, contextual], new KeyboardEvent("keydown"))).toBe(fallback)
  })
})
