import { describe, expect, it } from "vitest"
import { formatBalanceError, formatCredits, readFoldOpen } from "../src/format"

describe("formatCredits", () => {
  it("formats with two decimals", () => {
    expect(formatCredits(5.309411174)).toBe("5.31")
  })

  it("formats zero", () => {
    expect(formatCredits(0)).toBe("0.00")
  })

  it("returns a dash for non-finite input", () => {
    expect(formatCredits(Number.NaN)).toBe("-")
  })
})

describe("formatBalanceError", () => {
  it("renders each error kind", () => {
    expect(formatBalanceError({ kind: "unauthorized" })).toContain("invalide")
    expect(formatBalanceError({ kind: "network" })).toContain("réseau")
    expect(formatBalanceError({ kind: "missing-header", status: 400 })).toContain("400")
    expect(formatBalanceError({ kind: "no-credential", reason: "missing" })).toContain("GreenPT")
  })
})

describe("readFoldOpen", () => {
  it("defaults to open when the KV store is absent", () => {
    expect(readFoldOpen(undefined)).toBe(true)
  })

  it("reads a persisted boolean", () => {
    expect(readFoldOpen({ get: () => false })).toBe(false)
  })

  it("falls back when the stored value is not a boolean", () => {
    expect(readFoldOpen({ get: () => "nope" })).toBe(true)
  })

  it("survives a throwing KV store", () => {
    expect(
      readFoldOpen({
        get: () => {
          throw new Error("kv down")
        },
      }),
    ).toBe(true)
  })
})