local tasty = require 'tasty'
local utils = require 'pandoc.utils'

local assert = tasty.assert
local test = tasty.test_case
local group = tasty.test_group

return {
  group 'blocks_to_inlines' {
    test('default separator', function ()
      local blocks = {
        pandoc.Para { pandoc.Str 'Paragraph1' },
        pandoc.Para { pandoc.Emph { pandoc.Str 'Paragraph2' } }
      }
      local expected = {
        pandoc.Str 'Paragraph1',
        pandoc.Space(), pandoc.Str '¶', pandoc.Space(),
        pandoc.Emph { pandoc.Str 'Paragraph2' }
      }
      assert.are_same(
        expected,
        utils.blocks_to_inlines(blocks)
      )
    end),
    test('custom separator', function ()
      local blocks = {
        pandoc.Para{ pandoc.Str 'Paragraph1' },
        pandoc.Para{ pandoc.Emph 'Paragraph2' }
      }
      local expected = {
        pandoc.Str 'Paragraph1',
        pandoc.LineBreak(),
        pandoc.Emph { pandoc.Str 'Paragraph2' }
      }
      assert.are_same(
        expected,
        utils.blocks_to_inlines(blocks, { pandoc.LineBreak() })
      )
    end)
  },

  group 'make_sections' {
    test('sanity check', function ()
      local blks = {
        pandoc.Header(1, {pandoc.Str 'First'}),
        pandoc.Header(2, {pandoc.Str 'Second'}),
        pandoc.Header(2, {pandoc.Str 'Third'}),
      }
      local hblks = utils.make_sections(true, 1, blks)
      assert.are_equal('Div', hblks[1].t)
      assert.are_equal('Header', hblks[1].content[1].t)
      assert.are_equal('1', hblks[1].content[1].attributes['number'])
    end)
  },

  group 'normalize_date' {
    test('09 Nov 1989', function ()
      assert.are_equal('1989-11-09', utils.normalize_date '09 Nov 1989')
    end),
    test('12/31/2017', function ()
      assert.are_equal('2017-12-31', utils.normalize_date '12/31/2017')
    end),
  },

  group 'sha1' {
    test('hashing', function ()
      local ref_hash = '0a0a9f2a6772942557ab5355d76af442f8f65e01'
      assert.are_equal(ref_hash, utils.sha1 'Hello, World!')
    end)
  },

  group 'stringify' {
    test('inlines', function ()
      local inline = pandoc.Emph{
        pandoc.Str 'Cogito',
        pandoc.Space(),
        pandoc.Str 'ergo',
        pandoc.Space(),
        pandoc.Str 'sum.',
      }
      assert.are_equal('Cogito ergo sum.', utils.stringify(inline))
    end)
  },

  group 'to_roman_numeral' {
    test('convertes number', function ()
      assert.are_equal('MDCCCLXXXVIII', utils.to_roman_numeral(1888))
    end),
    test('fails on non-convertible argument', function ()
      assert.is_falsy(pcall(utils.to_roman_numeral, 'not a number'))
    end)
  },

  group 'to_simple_table' {
    test('convertes Table', function ()
      function simple_cell (blocks)
        return {
          attr = pandoc.Attr(),
          alignment = "AlignDefault",
          contents = blocks,
          col_span = 1,
          row_span = 1,
        }
      end
      local tbl = pandoc.Table(
        {long = {pandoc.Plain {
                   pandoc.Str "the", pandoc.Space(), pandoc.Str "caption"}}},
        {{pandoc.AlignDefault, nil}},
        {pandoc.Attr(), {{pandoc.Attr(), {simple_cell{pandoc.Plain "head1"}}}}},
        {{
            attr = pandoc.Attr(),
            body = {{pandoc.Attr(), {simple_cell{pandoc.Plain "cell1"}}}},
            head = {},
            row_head_columns = 0
        }},
        {pandoc.Attr(), {}},
        pandoc.Attr()
      )
      local stbl = utils.to_simple_table(tbl)
      assert.are_equal('SimpleTable', stbl.t)
      assert.are_equal('head1', utils.stringify(stbl.headers[1]))
      assert.are_equal('cell1', utils.stringify(stbl.rows[1][1]))
      assert.are_equal('the caption', utils.stringify(pandoc.Span(stbl.caption)))
    end),
    test('fails on para', function ()
      assert.is_falsy(pcall(utils.to_simple_table, pandoc.Para "nope"))
    end),
  },
  group 'from_simple_table' {
    test('converts SimpleTable to Table', function ()
      local caption = {pandoc.Str "Overview"}
      local aligns = {pandoc.AlignDefault, pandoc.AlignDefault}
      local widths = {0, 0} -- let pandoc determine col widths
      local headers = {
        {pandoc.Plain "Language"},
        {pandoc.Plain "Typing"}
      }
      local rows = {
        {{pandoc.Plain "Haskell"}, {pandoc.Plain "static"}},
        {{pandoc.Plain "Lua"}, {pandoc.Plain "Dynamic"}},
      }
      local simple_table = pandoc.SimpleTable(
        caption,
        aligns,
        widths,
        headers,
        rows
      )
      local tbl = utils.from_simple_table(simple_table)
      assert.are_equal("Table", tbl.t)
      assert.are_same(
        {pandoc.Plain(caption)},
        tbl.caption.long
      )
      -- reversible
      assert.are_same(simple_table, utils.to_simple_table(tbl))
    end),
  }
}