let jobsApi: any
let companiesApi: any
let usersApi: any

// Mock environment variable
const ORIGINAL_ENV = process.env

beforeEach(() => {
    jest.resetModules()
    process.env = { ...process.env, NEXT_PUBLIC_API_URL: 'http://test-api.com/api/v1' }

    // Re-require modules to pick up new env vars
    const api = require('../api')
    jobsApi = api.jobsApi
    companiesApi = api.companiesApi
    usersApi = api.usersApi

    global.fetch = jest.fn()
})

afterEach(() => {
    jest.clearAllMocks()
})

afterAll(() => {
    process.env = ORIGINAL_ENV
})

describe('API Client', () => {
    describe('jobsApi', () => {
        it('should fetch jobs with correct parameters', async () => {
            const mockJobs = {
                data: [{ id: 1, title: 'Dev Job' }],
                pagination: { total: 1 }
            }
                ; (global.fetch as jest.Mock).mockResolvedValueOnce({
                    ok: true,
                    json: async () => mockJobs,
                })

            const response = await jobsApi.list({ page: 1, limit: 10, companyId: 5 })

            expect(global.fetch).toHaveBeenCalledWith(
                'http://test-api.com/api/v1/jobs?page=1&limit=10&companyId=5',
                expect.objectContaining({
                    headers: expect.objectContaining({
                        'Content-Type': 'application/json'
                    })
                })
            )
            expect(response).toEqual(mockJobs)
        })

        it('should handle API errors correctly', async () => {
            ; (global.fetch as jest.Mock).mockResolvedValueOnce({
                ok: false,
                status: 404,
                text: async () => 'Not Found',
            })

            await expect(jobsApi.list()).rejects.toThrow('Not Found')
        })
    })

    describe('companiesApi', () => {
        it('should create company correctly', async () => {
            const mockCompany = { id: '123', name: 'Test Corp' }
                ; (global.fetch as jest.Mock).mockResolvedValueOnce({
                    ok: true,
                    json: async () => mockCompany,
                })

            const newCompany = { name: 'Test Corp', slug: 'test-corp' }
            await companiesApi.create(newCompany)

            expect(global.fetch).toHaveBeenCalledWith(
                'http://test-api.com/api/v1/companies',
                expect.objectContaining({
                    method: 'POST',
                    body: JSON.stringify(newCompany)
                })
            )
        })
    })

    describe('URL Construction', () => {
        it('should handle double /api/v1 correctly', async () => {
            ; (global.fetch as jest.Mock).mockResolvedValueOnce({
                ok: true,
                json: async () => ([]),
            })

            // We need to import the raw apiRequest function to test this properly, 
            // but since it's not exported, we simulate via an exported function
            await usersApi.list()

            // The apiRequest logic handles URL cleaning.
            // Expected: base http://test-api.com/api/v1 + endpoint /api/v1/users -> http://test-api.com/api/v1/users
            // NOT http://test-api.com/api/v1/api/v1/users

            expect(global.fetch).toHaveBeenCalledWith(
                'http://test-api.com/api/v1/users',
                expect.any(Object)
            )
        })
    })
})