local t = require('test.testutil')
local n = require('test.functional.testnvim')()
local tt = require('test.functional.testterm')
local Screen = require('test.functional.ui.screen')

local uv = vim.uv
local eq, eval, expect, exec = t.eq, n.eval, n.expect, n.exec
local assert_alive = n.assert_alive
local clear = n.clear
local command = n.command
local feed = n.feed
local fn = n.fn
local neq = t.neq
local nvim_prog = n.nvim_prog
local ok = t.ok
local rmdir = n.rmdir
local new_pipename = n.new_pipename
local pesc = vim.pesc
local is_os = t.is_os
local skip = t.skip
local set_session = n.set_session
local async_meths = n.async_meths
local expect_msg_seq = n.expect_msg_seq
local pcall_err = t.pcall_err
local mkdir = t.mkdir
local poke_eventloop = n.poke_eventloop
local api = n.api
local retry = t.retry
local write_file = t.write_file
local expect_exitcode = tt.expect_exitcode

describe(':recover', function()
  before_each(clear)

  it('fails if given a non-existent swapfile', function()
    local swapname = 'bogus_swapfile'
    local swapname2 = 'bogus_swapfile.swp'
    eq(
      'Vim(recover):E305: No swap file found for ' .. swapname,
      pcall_err(command, 'recover ' .. swapname)
    ) -- Should not segfault. #2117
    -- Also check filename ending with ".swp". #9504
    eq('Vim(recover):E306: Cannot open ' .. swapname2, pcall_err(command, 'recover ' .. swapname2)) -- Should not segfault. #2117
    assert_alive()
  end)
end)

describe("preserve and (R)ecover with custom 'directory'", function()
  local swapdir = uv.cwd() .. '/Xtest_recover_dir'
  local testfile = 'Xtest_recover_file1'
  -- Put swapdir at the start of the 'directory' list. #1836
  -- Note: `set swapfile` *must* go after `set directory`: otherwise it may
  -- attempt to create a swapfile in different directory.
  local init = [[
    set directory^=]] .. swapdir:gsub([[\]], [[\\]]) .. [[//
    set swapfile fileformat=unix undolevels=-1
  ]]

  local nvim0 --- @type test.Session
  before_each(function()
    nvim0 = n.new_session(false)
    set_session(nvim0)
    rmdir(swapdir)
    mkdir(swapdir)
  end)
  after_each(function()
    command('%bwipeout!')
    rmdir(swapdir)
  end)

  --- @return string
  local function setup_swapname()
    exec(init)
    command('edit! ' .. testfile)
    feed('isometext<esc>')
    exec('redir => g:swapname | silent swapname | redir END')
    return eval('g:swapname'):match('[^\n]*$')
  end

  local function test_recover(swappath1)
    -- Start another Nvim instance.
    local nvim2 =
      n.new_session(false, { args = { '-u', 'NONE', '-i', 'NONE', '--embed' }, merge = false })
    set_session(nvim2)

    exec(init)

    -- Use the "SwapExists" event to choose the (R)ecover choice at the dialog.
    command('autocmd SwapExists * let v:swapchoice = "r"')
    command('silent edit! ' .. testfile)
    exec('redir => g:swapname | silent swapname | redir END')

    local swappath2 = eval('g:swapname')

    expect('sometext')
    -- swapfile from session 1 should end in .swp
    eq(testfile .. '.swp', string.match(swappath1, '[^%%]+$'))
    -- swapfile from session 2 should end in .swo
    eq(testfile .. '.swo', string.match(swappath2, '[^%%]+$'))
    -- Verify that :swapname was not truncated (:help 'shortmess').
    ok(nil == string.find(swappath1, '%.%.%.'))
    ok(nil == string.find(swappath2, '%.%.%.'))
  end

  it('with :preserve and SIGKILL', function()
    local swappath1 = setup_swapname()
    command('preserve')
    neq(nil, uv.fs_stat(swappath1))
    eq(0, vim.uv.kill(eval('getpid()'), 'sigkill'))
    test_recover(swappath1)
  end)

  it('closing stdio channel without :preserve #22096', function()
    local swappath1 = setup_swapname()
    nvim0:close()
    neq(nil, uv.fs_stat(swappath1))
    test_recover(swappath1)
  end)

  it('killing TUI process without :preserve #22096', function()
    -- Windows(#38669): inner server could attach to the outer Nvim terminal's console
    -- and die abruptly when the outer terminal job closed, leaving an unreadable swapfile
    skip(is_os('win'), 'unreadable swapfile on Windows after TUI process exit')

    local screen0 = Screen.new()
    local child_server = new_pipename()
    fn.jobstart({ nvim_prog, '-u', 'NONE', '-i', 'NONE', '--listen', child_server }, {
      term = true,
      env = { VIMRUNTIME = os.getenv('VIMRUNTIME') },
    })
    screen0:expect({ any = pesc('[No Name]') }) -- Wait for the child process to start.
    local child_session = n.connect(child_server)
    set_session(child_session)
    local swappath1 = setup_swapname()
    set_session(nvim0)
    -- n.exec_lua([[vim.uv.kill(vim.fn.jobpid(vim.bo.channel), 'sigterm')]])
    command('call chanclose(&channel)') -- Kill the child process.
    -- Wait for the child process to stop.
    -- FIXME: SIGHUP sometimes isn't caught with ASAN.
    screen0:expect({ any = t.is_asan() and '%[Process exited %d+%]' or '%[Process exited 1%]' })
    neq(nil, uv.fs_stat(swappath1))
    test_recover(swappath1)
  end)

  it('manual :recover with multiple swapfiles', function()
    local swappath1 = setup_swapname()
    eq('.swp', swappath1:match('%.[^.]+$'))
    nvim0:close()
    neq(nil, uv.fs_stat(swappath1))
    local swappath2 = swappath1:gsub('%.swp$', '.swo')
    eq(true, uv.fs_copyfile(swappath1, swappath2))
    clear()
    exec(init)
    local screen = Screen.new(256, 40)
    feed(':recover! ' .. testfile .. '<CR>')
    screen:expect({
      any = {
        '\nSwap files found:',
        '\n   In directory ',
        vim.pesc('\n1.    '),
        vim.pesc('\n2.    '),
        vim.pesc('\nEnter number of swap file to use (0 to quit): ^'),
      },
      none = vim.pesc('{18:^@}'),
    })
    feed('2<CR>')
    screen:expect({
      any = {
        vim.pesc('\nRecovery completed.'),
        vim.pesc('\n{6:Press ENTER or type command to continue}^'),
      },
    })
    feed('<CR>')
    expect('sometext')
  end)
end)

describe('swapfile detection', function()
  local swapdir = uv.cwd() .. '/Xtest_swapdialog_dir'
  local nvim0 --- @type test.Session
  -- Put swapdir at the start of the 'directory' list. #1836
  -- Note: `set swapfile` *must* go after `set directory`: otherwise it may
  -- attempt to create a swapfile in different directory.
  local init = [[
    set directory^=]] .. swapdir:gsub([[\]], [[\\]]) .. [[//
    set swapfile fileformat=unix nomodified undolevels=-1 nohidden
  ]]
  before_each(function()
    nvim0 = n.new_session(false)
    set_session(nvim0)
    rmdir(swapdir)
    mkdir(swapdir)
  end)
  after_each(function()
    set_session(nvim0)
    command('%bwipeout!')
    rmdir(swapdir)
  end)

  it('redrawing during prompt does not break treesitter', function()
    local testfile = 'Xtest_swapredraw.lua'
    finally(function()
      os.remove(testfile)
    end)
    write_file(
      testfile,
      [[
vim.o.foldmethod = 'expr'
vim.o.foldexpr = 'v:lua.vim.treesitter.foldexpr()'
vim.defer_fn(function()
  vim.api.nvim__redraw({ valid = false })
end, 500)
pcall(vim.cmd.edit, 'Xtest_swapredraw.lua')
    ]]
    )
    exec(init)
    command('edit! ' .. testfile)
    command('preserve')
    local args2 = { '--clean', '--embed', '--cmd', n.runtime_set }
    local nvim2 = n.new_session(true, { args = args2, merge = false })
    set_session(nvim2)
    local screen2 = Screen.new(100, 40)
    screen2:add_extra_attr_ids({
      [100] = { foreground = Screen.colors.NvimLightGrey2 },
      [101] = { foreground = Screen.colors.NvimLightGreen },
      [102] = {
        foreground = Screen.colors.NvimLightGrey4,
        background = Screen.colors.NvimDarkGrey1,
      },
      [104] = { foreground = Screen.colors.NvimLightCyan },
      [105] = { foreground = Screen.colors.NvimDarkGrey4 },
      [106] = {
        foreground = Screen.colors.NvimLightGrey2,
        background = Screen.colors.NvimDarkGrey4,
      },
      [107] = { foreground = Screen.colors.NvimLightGrey2, bold = true },
      [108] = { foreground = Screen.colors.NvimLightBlue },
    })
    exec(init)
    command('autocmd! nvim.swapfile') -- Delete the default handler (which skips the dialog).
    feed(':edit ' .. testfile .. '<CR>')
    eq('r?', api.nvim_get_mode().mode)
    feed('E:source<CR>')
    eq('r?', api.nvim_get_mode().mode)
    screen2:sleep(1000)
    feed('E')
    screen2:expect([[
      {100:^vim.o.foldmethod} {100:=} {101:'expr'}                                                                           |
      {100:vim.o.foldexpr} {100:=} {101:'v:lua.vim.treesitter.foldexpr()'}                                                  |
      {102:+--  3 lines: vim.defer_fn(function()·······························································}|
      {104:pcall}{100:(vim.cmd.edit,} {101:'Xtest_swapredraw.lua'}{100:)}                                                         |
      {105:~                                                                                                   }|*34
      {106:Xtest_swapredraw.lua                                                              1,1            All}|
                                                                                                          |
    ]])
    nvim2:close()
  end)

  it('always show swapfile dialog #8840 #9027', function()
    local testfile = 'Xtest_swapdialog_file1'

    local expected_no_dialog = '^' .. (' '):rep(256) .. '|\n'
    for _ = 1, 37 do
      expected_no_dialog = expected_no_dialog .. '~' .. (' '):rep(255) .. '|\n'
    end
    expected_no_dialog = expected_no_dialog .. testfile .. (' '):rep(216) .. '0,0-1          All|\n'
    expected_no_dialog = expected_no_dialog .. (' '):rep(256) .. '|\n'

    exec(init)
    command('edit! ' .. testfile)
    feed('isometext<esc>')
    command('preserve')

    -- Start another Nvim instance.
    local nvim2 =
      n.new_session(true, { args = { '-u', 'NONE', '-i', 'NONE', '--embed' }, merge = false })
    set_session(nvim2)
    local screen2 = Screen.new(256, 40)
    screen2._default_attr_ids = nil
    exec(init)
    command('autocmd! nvim.swapfile') -- Delete the default handler (which skips the dialog).

    -- With shortmess+=F
    command('set shortmess+=F')
    feed(':edit ' .. testfile .. '<CR>')
    screen2:expect {
      any = [[E325: ATTENTION.*]]
        .. '\n'
        .. [[Found a swap file by the name ".*]]
        .. [[Xtest_swapdialog_dir[/\].*]]
        .. testfile
        .. [[%.swp"]],
    }
    feed('e') -- Chose "Edit" at the swap dialog.
    screen2:expect(expected_no_dialog)

    -- With :silent and shortmess+=F
    feed(':silent edit %<CR>')
    screen2:expect {
      any = [[Found a swap file by the name ".*]]
        .. [[Xtest_swapdialog_dir[/\].*]]
        .. testfile
        .. [[%.swp"]],
    }
    feed('e') -- Chose "Edit" at the swap dialog.
    screen2:expect(expected_no_dialog)

    -- With :silent! and shortmess+=F
    feed(':silent! edit %<CR>')
    screen2:expect {
      any = [[Found a swap file by the name ".*]]
        .. [[Xtest_swapdialog_dir[/\].*]]
        .. testfile
        .. [[%.swp"]],
    }
    feed('e') -- Chose "Edit" at the swap dialog.
    screen2:expect(expected_no_dialog)

    -- With API (via eval/Vimscript) call and shortmess+=F
    feed(':call nvim_command("edit %")<CR>')
    screen2:expect {
      any = [[Found a swap file by the name ".*]]
        .. [[Xtest_swapdialog_dir[/\].*]]
        .. testfile
        .. [[%.swp"]],
    }
    feed('e') -- Chose "Edit" at the swap dialog.
    screen2:expect({ any = pesc('E5555: API call: Vim(edit):E325: ATTENTION') })
    feed('<c-c>')
    screen2:expect(expected_no_dialog)

    -- With API call and shortmess+=F
    async_meths.nvim_command('edit %')
    screen2:expect {
      any = [[Found a swap file by the name ".*]]
        .. [[Xtest_swapdialog_dir[/\].*]]
        .. testfile
        .. [[%.swp"]],
    }
    feed('e') -- Chose "Edit" at the swap dialog.
    expect_msg_seq({
      ignore = { 'redraw' },
      seqs = {
        { { 'notification', 'nvim_error_event', { 0, 'Vim(edit):E325: ATTENTION' } } },
      },
    })
    feed('<cr>')

    nvim2:close()
  end)

  it('default SwapExists handler selects "(E)dit" and skips prompt', function()
    exec(init)
    command('edit Xfile1')
    command("put ='some text...'")
    command('preserve') -- Make sure the swap file exists.
    local nvimpid = fn.getpid()

    local nvim1 = n.new_session(true)
    set_session(nvim1)
    local screen = Screen.new(75, 18)
    exec(init)

    feed(':edit Xfile1\n')
    local msg_expected = ('W325: Ignoring swapfile from Nvim process %d'):format(nvimpid)
    screen:expect({ any = vim.pesc(msg_expected) })
    eq(msg_expected, n.exec_capture('messages'))
    command('bwipe!')

    -- With smaller screen, the message should be truncated, but only in display.
    screen:try_resize(40, 18)
    feed(':edit Xfile1\n')
    screen:expect([[
      ^                                        |
      {1:~                                       }|*16
      {19:W325: Ignoring swapfile from Nvim proces}|
    ]])
    eq(('\n' .. msg_expected):rep(2):sub(2), n.exec_capture('messages'))
    command('bwipe!')

    -- Also test with 'ruler'.
    screen:try_resize(60, 18)
    command('set ruler')
    feed(':edit Xfile1\n')
    screen:expect([[
      ^                                                            |
      {1:~                                                           }|*16
      {19:W325: Ignoring swapfile from Nvim process }0,0-1         All |
    ]])
    eq(('\n' .. msg_expected):rep(3):sub(2), n.exec_capture('messages'))
    command('bwipe!')

    nvim1:close()
  end)

  -- oldtest: Test_swap_prompt_splitwin()
  it('selecting "q" in the attention prompt', function()
    exec(init)
    command('edit Xfile1')
    command('preserve') -- Make sure the swap file exists.

    local screen = Screen.new(75, 18)
    local nvim1 = n.new_session(true)
    set_session(nvim1)
    screen:attach()
    exec(init)
    command('autocmd! nvim.swapfile') -- Delete the default handler (which skips the dialog).
    feed(':split Xfile1\n')
    -- The default SwapExists handler does _not_ skip this prompt.
    screen:expect({
      any = pesc('{6:[O]pen Read-Only, (E)dit anyway, (R)ecover, (Q)uit, (A)bort: }^'),
    })
    feed('q')
    screen:expect([[
      ^                                                                           |
      {1:~                                                                          }|*16
                                                                                 |
    ]])
    feed(':<CR>')
    screen:expect([[
      ^                                                                           |
      {1:~                                                                          }|*16
      :                                                                          |
    ]])
    nvim1:close()

    local nvim2 = n.new_session(true)
    set_session(nvim2)
    screen:attach()
    exec(init)
    command('autocmd! nvim.swapfile') -- Delete the default handler (which skips the dialog).
    command('set more')
    command('au bufadd * let foo_w = wincol()')
    feed(':e Xfile1<CR>')
    screen:expect({ any = pesc('{6:-- More --}^') })
    feed('<Space>')
    screen:expect({
      any = pesc('{6:[O]pen Read-Only, (E)dit anyway, (R)ecover, (Q)uit, (A)bort: }^'),
    })
    feed('q')
    command([[echo 'hello']])
    screen:expect([[
      ^                                                                           |
      {1:~                                                                          }|*16
      hello                                                                      |
    ]])
    nvim2:close()
  end)

  --- @param swapexists boolean Enable the default SwapExists handler.
  --- @param on_swapfile_running fun(screen: any) Called after swapfile ("STILL RUNNING") prompt.
  local function test_swapfile_after_reboot(swapexists, on_swapfile_running)
    local screen = Screen.new(75, 30)

    exec(init)
    if not swapexists then
      command('autocmd! nvim.swapfile') -- Delete the default handler (which skips the dialog).
    end
    command('set nohidden')

    exec([=[
      " Make a copy of the current swap file to "Xswap".
      " Return the name of the swap file.
      func CopySwapfile()
        preserve
        " get the name of the swap file
        let swname = split(execute("swapname"))[0]
        let swname = substitute(swname, '[[:blank:][:cntrl:]]*\(.\{-}\)[[:blank:][:cntrl:]]*$', '\1', '')
        " make a copy of the swap file in Xswap
        set binary
        exe 'sp ' . fnameescape(swname)
        w! Xswap
        set nobinary
        return swname
      endfunc
    ]=])

    -- Edit a file and grab its swapfile.
    exec([[
      edit Xswaptest
      call setline(1, ['a', 'b', 'c'])
    ]])
    local swname = fn.CopySwapfile()

    -- Forget we edited this file
    exec([[
      new
      only!
      bwipe! Xswaptest
    ]])

    os.rename('Xswap', swname)

    feed(':edit Xswaptest<CR>')
    on_swapfile_running(screen)

    feed('e')

    -- Forget we edited this file
    exec([[
      new
      only!
      bwipe! Xswaptest
    ]])

    -- pretend that the swapfile was created before boot
    local atime = os.time() - uv.uptime() - 10
    uv.fs_utime(swname, atime, atime)

    feed(':edit Xswaptest<CR>')
    screen:expect({
      any = table.concat({
        '{9:E325: ATTENTION}',
        pesc('{6:[O]pen Read-Only, (E)dit anyway, (R)ecover, (D)elete it, (Q)uit, (A)bort: }^'),
      }, '.*'),
    })

    feed('e')
  end

  -- oldtest: Test_nocatch_process_still_running()
  it('swapfile created before boot vim-patch:8.2.2586', function()
    test_swapfile_after_reboot(false, function(screen)
      screen:expect({
        any = table.concat({
          '{9:E325: ATTENTION}',
          '{6:        process ID: %d* %(STILL RUNNING%)}',
          '{6:While opening file "Xswaptest"}',
          pesc('{6:[O]pen Read-Only, (E)dit anyway, (R)ecover, (Q)uit, (A)bort: }^'),
        }, '.*'),
      })
    end)
  end)

  it('swapfile created before boot + default SwapExists handler', function()
    test_swapfile_after_reboot(true, function(screen)
      screen:expect({ any = 'W325: Ignoring swapfile from Nvim process' })
    end)
  end)
end)

describe('quitting swapfile dialog on startup stops TUI properly', function()
  local swapdir = uv.cwd() .. '/Xtest_swapquit_dir'
  local testfile = 'Xtest_swapquit_file1'
  local otherfile = 'Xtest_swapquit_file2'
  -- Put swapdir at the start of the 'directory' list. #1836
  -- Note: `set swapfile` *must* go after `set directory`: otherwise it may
  -- attempt to create a swapfile in different directory.
  local init_dir = [[set directory^=]] .. swapdir:gsub([[\]], [[\\]]) .. [[//]]
  local init_set = [[set swapfile fileformat=unix nomodified undolevels=-1 nohidden]]

  before_each(function()
    clear({ args = { '--cmd', init_dir, '--cmd', init_set } })
    rmdir(swapdir)
    mkdir(swapdir)
    write_file(
      testfile,
      [[
      first
      second
      third

    ]]
    )
    command('edit! ' .. testfile)
    feed('Gisometext<esc>')
    poke_eventloop()
    clear() -- Leaves a swap file behind
    api.nvim_ui_attach(80, 30, {})
  end)
  after_each(function()
    rmdir(swapdir)
    os.remove(testfile)
    os.remove(otherfile)
  end)

  it('(Q)uit at first file argument', function()
    local chan = fn.jobstart(
      { nvim_prog, '-u', 'NONE', '-i', 'NONE', '--cmd', init_dir, '--cmd', init_set, testfile },
      {
        term = true,
        env = { VIMRUNTIME = os.getenv('VIMRUNTIME') },
      }
    )
    retry(nil, nil, function()
      eq(
        '[O]pen Read-Only, (E)dit anyway, (R)ecover, (D)elete it, (Q)uit, (A)bort:',
        eval("getline('$')->trim(' ', 2)")
      )
    end)
    api.nvim_chan_send(chan, 'q')
    expect_exitcode(1)
  end)

  it('(A)bort at second file argument with -p', function()
    local chan = fn.jobstart({
      nvim_prog,
      '-u',
      'NONE',
      '-i',
      'NONE',
      '--cmd',
      init_dir,
      '--cmd',
      init_set,
      '-p',
      otherfile,
      testfile,
    }, {
      term = true,
      env = { VIMRUNTIME = os.getenv('VIMRUNTIME') },
    })
    retry(nil, nil, function()
      eq(
        '[O]pen Read-Only, (E)dit anyway, (R)ecover, (D)elete it, (Q)uit, (A)bort:',
        eval("getline('$')->trim(' ', 2)")
      )
    end)
    api.nvim_chan_send(chan, 'a')
    expect_exitcode(1)
  end)

  it('(Q)uit at file opened by -t', function()
    write_file(
      otherfile,
      ([[
      !_TAG_FILE_ENCODING	utf-8	//
      first	%s	/^  \zsfirst$/
      second	%s	/^  \zssecond$/
      third	%s	/^  \zsthird$/]]):format(testfile, testfile, testfile)
    )
    local chan = fn.jobstart({
      nvim_prog,
      '-u',
      'NONE',
      '-i',
      'NONE',
      '--cmd',
      init_dir,
      '--cmd',
      init_set,
      '--cmd',
      'set tags=' .. otherfile,
      '-tsecond',
    }, {
      term = true,
      env = { VIMRUNTIME = os.getenv('VIMRUNTIME') },
    })
    retry(nil, nil, function()
      eq(
        '[O]pen Read-Only, (E)dit anyway, (R)ecover, (D)elete it, (Q)uit, (A)bort:',
        eval("getline('$')->trim(' ', 2)")
      )
    end)
    api.nvim_chan_send(chan, 'q')
    expect_exitcode(1)
  end)
end)
