-- local tester = require('telescope.pickers._test')
local config = require('telescope.config')
local resolve = require('telescope.config.resolve')
local layout_strats = require('telescope.pickers.layout_strategies')

local validate_layout_config = layout_strats._validate_layout_config

local eq = assert.are.same

describe('layout_strategies', function()
  it('should have validator', function()
    assert(validate_layout_config, "Has validator")
  end)

  local test_height = function(should, output, input, opts)
    opts = opts or {}

    local max_columns, max_lines = opts.max_columns or 100, opts.max_lines or 100
    it(should, function()
      local layout_config = validate_layout_config("horizontal", { height = true }, { height = input })

      eq(output, resolve.resolve_height(layout_config.height)({}, max_columns, max_lines))
    end)
  end

  test_height('should handle numbers', 10, 10)

  test_height('should handle percentage: 100', 10, 0.1, { max_lines = 100 })
  test_height('should handle percentage: 110', 11, 0.1, { max_lines = 110 })

  test_height('should call functions: simple', 5, function() return 5 end)
  test_height('should call functions: percentage', 15, function(_, _, lines) return 0.1 * lines end, { max_lines = 150 })

  local test_defaults_key = function(should, key, strat, output, ours, theirs, override)
    ours = ours or {}
    theirs = theirs or {}
    override = override or {}

    it(should, function()
      config.clear_defaults()
      config.set_defaults({layout_config=theirs}, {layout_config={ours,'description'}})
      local layout_config = validate_layout_config(strat, layout_strats._configurations[strat], override)
      eq(output, layout_config[key])
    end)
  end

  test_defaults_key("should use ours if theirs and override don't give the key",
    'height','horizontal',50,
    {height=50}, {width=100}, {width=120}
  )

  test_defaults_key("should use ours if theirs and override don't give the key for this strategy",
    'height','horizontal',50,
    {height=50}, {vertical={height=100}}, {vertical={height=120}}
  )

  test_defaults_key("should use theirs if override doesn't give the key",
    'height','horizontal',100,
    {height=50}, {height=100}, {width=120}
  )

  test_defaults_key("should use override if key given",
    'height','horizontal',120,
    {height=50}, {height=100}, {height=120}
  )

  test_defaults_key("should use override if key given for this strategy",
    'height','horizontal',120,
    {height=50}, {height=100}, {horizontal={height=120}}
  )

  test_defaults_key("should use theirs if override doesn't give key (even if ours has strategy specific)",
    'height','horizontal',100,
    {horizontal={height=50}}, {height=100}, {width=120}
  )

  test_defaults_key("should use override (even if ours has strategy specific)",
    'height','horizontal',120,
    {horizontal={height=50}}, {height=100}, {height=120}
  )

  test_defaults_key("should use override (even if theirs has strategy specific)",
    'height','horizontal',120,
    {height=50}, {horizontal={height=100}}, {height=120}
  )

  test_defaults_key("should use override (even if ours and theirs have strategy specific)",
    'height','horizontal',120,
    {horizontal={height=50}}, {horizontal={height=100}}, {height=120}
  )

end)