-- Test suite for vim.range
local t = require('test.testutil')
local n = require('test.functional.testnvim')()
local eq = t.eq

local clear = n.clear
local exec_lua = n.exec_lua
local insert = n.insert

describe('vim.range', function()
  before_each(clear)

  it('creates a range with or without optional fields', function()
    local range = exec_lua(function()
      return vim.range(3, 5, 4, 6)
    end)
    eq(3, range[1])
    eq(5, range[2])
    eq(4, range[3])
    eq(6, range[4])
    eq(nil, range[5])
    local buf = exec_lua(function()
      return vim.api.nvim_create_buf(false, true)
    end)
    range = exec_lua(function()
      return vim.range(3, 5, 4, 6, { buf = buf })
    end)
    eq(buf, range[5])
  end)

  it('creates a range from two positions when optional fields are not matched', function()
    local range = exec_lua(function()
      return vim.range(vim.pos(3, 5), vim.pos(4, 6))
    end)
    eq(3, range[1])
    eq(5, range[2])
    eq(4, range[3])
    eq(6, range[4])
    eq(nil, range[5])

    local buf1 = exec_lua(function()
      return vim.api.nvim_create_buf(false, true)
    end)
    range = exec_lua(function()
      return vim.range(vim.pos(3, 5, { buf = buf1 }), vim.pos(4, 6, { buf = buf1 }))
    end)
    eq(buf1, range[5])

    local buf2 = exec_lua(function()
      return vim.api.nvim_create_buf(false, true)
    end)
    local success = exec_lua(function()
      return pcall(function()
        return vim.range(vim.pos(3, 5, { buf = buf1 }), vim.pos(4, 6, { buf = buf2 }))
      end)
    end)
    eq(success, false)
  end)

  it('converts between vim.Range and lsp.Range', function()
    local buf = exec_lua(function()
      return vim.api.nvim_get_current_buf()
    end)
    insert('Neovim 是 Vim 的分支，专注于扩展性和可用性。')
    local lsp_range = exec_lua(function()
      local range = vim.range(0, 10, 0, 36, { buf = buf })
      return range:to_lsp('utf-16')
    end)
    eq({
      ['start'] = { line = 0, character = 8 },
      ['end'] = { line = 0, character = 20 },
    }, lsp_range)
    local range = exec_lua(function()
      return vim.range.lsp(buf, lsp_range, 'utf-16')
    end)
    eq({
      0,
      10,
      0,
      36,
      buf,
    }, range)
  end)

  it('checks whether a range contains a position', function()
    eq(
      true,
      exec_lua(function()
        return vim.range(0, 0, 1, 5):has(vim.pos(0, 1))
      end)
    )
  end)

  it('checks whether a range does not contain an empty range just outside it', function()
    eq(
      false,
      exec_lua(function()
        return vim.range(0, 0, 0, 4):has(vim.range(0, 0, 0, 0))
      end)
    )
  end)
end)