local helpers = require('test.functional.helpers')(after_each)
local clear, eq, ok = helpers.clear, helpers.eq, helpers.ok
local api = helpers.api
local fn = helpers.fn
local request = helpers.request
local NIL = vim.NIL
local pcall_err = helpers.pcall_err
local command = helpers.command

describe('api/tabpage', function()
  before_each(clear)

  describe('list_wins and get_win', function()
    it('works', function()
      helpers.command('tabnew')
      helpers.command('vsplit')
      local tab1, tab2 = unpack(api.nvim_list_tabpages())
      local win1, win2, win3 = unpack(api.nvim_list_wins())
      eq({ win1 }, api.nvim_tabpage_list_wins(tab1))
      eq({ win2, win3 }, api.nvim_tabpage_list_wins(tab2))
      eq(win2, api.nvim_tabpage_get_win(tab2))
      api.nvim_set_current_win(win3)
      eq(win3, api.nvim_tabpage_get_win(tab2))
    end)

    it('validates args', function()
      eq('Invalid tabpage id: 23', pcall_err(api.nvim_tabpage_list_wins, 23))
    end)
  end)

  describe('{get,set,del}_var', function()
    it('works', function()
      api.nvim_tabpage_set_var(0, 'lua', { 1, 2, { ['3'] = 1 } })
      eq({ 1, 2, { ['3'] = 1 } }, api.nvim_tabpage_get_var(0, 'lua'))
      eq({ 1, 2, { ['3'] = 1 } }, api.nvim_eval('t:lua'))
      eq(1, fn.exists('t:lua'))
      api.nvim_tabpage_del_var(0, 'lua')
      eq(0, fn.exists('t:lua'))
      eq('Key not found: lua', pcall_err(api.nvim_tabpage_del_var, 0, 'lua'))
      api.nvim_tabpage_set_var(0, 'lua', 1)
      command('lockvar t:lua')
      eq('Key is locked: lua', pcall_err(api.nvim_tabpage_del_var, 0, 'lua'))
      eq('Key is locked: lua', pcall_err(api.nvim_tabpage_set_var, 0, 'lua', 1))
    end)

    it('tabpage_set_var returns the old value', function()
      local val1 = { 1, 2, { ['3'] = 1 } }
      local val2 = { 4, 7 }
      eq(NIL, request('tabpage_set_var', 0, 'lua', val1))
      eq(val1, request('tabpage_set_var', 0, 'lua', val2))
    end)

    it('tabpage_del_var returns the old value', function()
      local val1 = { 1, 2, { ['3'] = 1 } }
      local val2 = { 4, 7 }
      eq(NIL, request('tabpage_set_var', 0, 'lua', val1))
      eq(val1, request('tabpage_set_var', 0, 'lua', val2))
      eq(val2, request('tabpage_del_var', 0, 'lua'))
    end)
  end)

  describe('get_number', function()
    it('works', function()
      local tabs = api.nvim_list_tabpages()
      eq(1, api.nvim_tabpage_get_number(tabs[1]))

      helpers.command('tabnew')
      local tab1, tab2 = unpack(api.nvim_list_tabpages())
      eq(1, api.nvim_tabpage_get_number(tab1))
      eq(2, api.nvim_tabpage_get_number(tab2))

      helpers.command('-tabmove')
      eq(2, api.nvim_tabpage_get_number(tab1))
      eq(1, api.nvim_tabpage_get_number(tab2))
    end)
  end)

  describe('is_valid', function()
    it('works', function()
      helpers.command('tabnew')
      local tab = api.nvim_list_tabpages()[2]
      api.nvim_set_current_tabpage(tab)
      ok(api.nvim_tabpage_is_valid(tab))
      helpers.command('tabclose')
      ok(not api.nvim_tabpage_is_valid(tab))
    end)
  end)
end)