-- Workflow (c): follow a [[link]] under the cursor on <CR> to the target doc.

local h = require("e2e.helpers")

describe("follow link", function()
  local ctx
  before_each(function()
    ctx = h.start()
  end)
  after_each(function()
    h.stop(ctx)
  end)

  it("follows [[B]] under the cursor to doc B", function()
    local b = h.create_doc("B", "the B doc")
    local a = h.create_doc("A", "see [[B]] here")

    local buf = h.open(a.id)
    local line = vim.api.nvim_buf_get_lines(buf, 0, 1, false)[1]
    local open_at = line:find("%[%[B") -- start of "[[B"
    assert.is_truthy(open_at)
    -- Put the cursor on the target inside the brackets.
    vim.api.nvim_win_set_cursor(0, { 1, open_at + 1 })

    require("heph.link").follow()

    local cur = vim.api.nvim_get_current_buf()
    assert.are.equal("heph://node/" .. b.id, vim.api.nvim_buf_get_name(cur))
    assert.are.equal(b.id, vim.b[cur].heph_node_id)
  end)

  it("leaves an unresolved [[link]] in place without erroring", function()
    local a = h.create_doc("Lonely", "points to [[Nowhere]]")
    local buf = h.open(a.id)
    vim.api.nvim_win_set_cursor(0, { 1, 12 }) -- inside [[Nowhere]]
    require("heph.link").follow()
    -- Still on the same buffer; no jump happened.
    assert.are.equal(buf, vim.api.nvim_get_current_buf())
  end)
end)