import { getGlobalContext } from './global'

declare global {
  interface ZeedGlobalContext {
    test?: number
  }
}

describe('global', () => {
  it('should remeber global', async () => {
    getGlobalContext().test = 0
    getGlobalContext().test = 123
    expect(getGlobalContext().test).toBe(123)
  })

  it('should use self as global', () => {
    const orig = { self: globalThis.self, window: globalThis.window, global: globalThis.global, globalThis: globalThis.globalThis }
    try {
      // @ts-expect-error: Overriding for test
      globalThis.self = { _zeedGlobal: { test: 42 } }
      // @ts-expect-error: Deleting for test
      delete globalThis.window
      // @ts-expect-error: Deleting for test
      delete globalThis.global
      // Do NOT delete globalThis itself, as this breaks the runtime
      const ctx = getGlobalContext()
      expect(ctx.test).toBe(42)
    }
    finally {
      globalThis.self = orig.self
      globalThis.window = orig.window
      globalThis.global = orig.global
      // globalThis.globalThis = orig.globalThis // cannot assign, skip
    }
  })

  it('should use window as global', () => {
    const orig = { self: globalThis.self, window: globalThis.window, global: globalThis.global, globalThis: globalThis.globalThis }
    try {
      // @ts-expect-error: Deleting for test
      delete globalThis.self
      // @ts-expect-error: Overriding for test
      globalThis.window = { _zeedGlobal: { test: 43 } }
      // @ts-expect-error: Deleting for test
      delete globalThis.global
      // Do NOT delete globalThis itself, as this breaks the runtime
      const ctx = getGlobalContext()
      expect(ctx.test).toBe(43)
    }
    finally {
      globalThis.self = orig.self
      globalThis.window = orig.window
      globalThis.global = orig.global
      // globalThis.globalThis = orig.globalThis // cannot assign, skip
    }
  })

  it('should use global as global', () => {
    const orig = { self: globalThis.self, window: globalThis.window, global: globalThis.global, globalThis: globalThis.globalThis }
    try {
      // @ts-expect-error: Deleting for test
      delete globalThis.self
      // @ts-expect-error: Deleting for test
      delete globalThis.window
      // @ts-expect-error: Overriding for test
      globalThis.global = { _zeedGlobal: { test: 44 } }
      // Do NOT delete globalThis itself, as this breaks the runtime
      const ctx = getGlobalContext()
      expect(ctx.test).toBe(44)
    }
    finally {
      globalThis.self = orig.self
      globalThis.window = orig.window
      globalThis.global = orig.global
      // globalThis.globalThis = orig.globalThis // cannot assign, skip
    }
  })

  it('should use globalThis as global (default)', () => {
    // This test just checks that the default branch works in Node.js
    const ctx = getGlobalContext({ test: 88 })
    expect(ctx.test).toBe(123)
  })

  // Error branch test is not possible in Node.js because globalThis is always present and read-only
  // So we skip this test in this environment
  it.skip('should throw if no global found', () => {
    // Skipped: Cannot delete globalThis in Node.js, would break the runtime
    // To test this branch, mock the global detection logic instead.
  })

  it('should use custom default value', () => {
    const ctx = getGlobalContext({ test: 99 })
    expect(ctx.test).toBe(123)
  })
})