local log = require('plenary.log')
local utils = require('CopilotChat.utils')
local context = require('CopilotChat.context')
local M = {}

function M.open()
  local lines = {
    'If you are facing issues, run `:checkhealth CopilotChat` and share the output.',
    '',
    'Log file path:',
    '`' .. log.logfile .. '`',
    '',
    'Temp directory:',
    '`' .. vim.fn.fnamemodify(os.tmpname(), ':h') .. '`',
    '',
    'Data directory:',
    '`' .. vim.fn.stdpath('data') .. '`',
    '',
  }

  local outline = context.outline(vim.api.nvim_get_current_buf())
  if outline then
    table.insert(lines, 'Current buffer outline:')
    table.insert(lines, '`' .. outline.filename .. '`')
    table.insert(lines, '```' .. outline.filetype)
    local outline_lines = vim.split(outline.content, '\n')
    for _, line in ipairs(outline_lines) do
      table.insert(lines, line)
    end
    table.insert(lines, '```')
  end

  local files = context.files()
  if files then
    table.insert(lines, 'Current workspace file map:')
    table.insert(lines, '```text')
    for _, file in ipairs(files) do
      for _, line in ipairs(vim.split(file.content, '\n')) do
        table.insert(lines, line)
      end
    end
    table.insert(lines, '```')
  end

  local width = 0
  for _, line in ipairs(lines) do
    width = math.max(width, #line)
  end
  local height = math.min(vim.o.lines - 3, #lines)
  local opts = {
    title = 'CopilotChat.nvim Debug Info',
    relative = 'editor',
    width = width,
    height = height,
    row = (vim.o.lines - height) / 2 - 1,
    col = (vim.o.columns - width) / 2,
    style = 'minimal',
    border = 'rounded',
  }

  if not utils.is_stable() then
    opts.footer = "Press 'q' to close this window."
  end

  local bufnr = vim.api.nvim_create_buf(false, true)
  vim.bo[bufnr].syntax = 'markdown'
  vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, lines)
  vim.bo[bufnr].modifiable = false
  vim.treesitter.start(bufnr, 'markdown')

  local win = vim.api.nvim_open_win(bufnr, true, opts)
  vim.wo[win].wrap = true
  vim.wo[win].linebreak = true
  vim.wo[win].cursorline = true
  vim.wo[win].conceallevel = 2

  -- Bind 'q' to close the window
  vim.api.nvim_buf_set_keymap(bufnr, 'n', 'q', '<cmd>close<CR>', { noremap = true, silent = true })
end

return M