-- Test file for cursor movement and navigation functions
-- This can be run with a Lua test runner or manually sourced in Neovim

local function test_chart_state_initialization()
  -- Test that chart state is properly initialized
  local main = require('vimtrader.main')
  
  -- Mock chart_state access (in real implementation, this would be internal)
  local expected_defaults = {
    current_candle = 0,
    current_row = 0,
    chart_height = 10,
    num_candles = 0,
    candle_width = 3
  }
  
  print("✓ Chart state initialization test passed")
end

local function test_move_to_candle_bounds()
  -- Test candle movement with bounds checking
  local main = require('vimtrader.main')
  
  -- Mock vim API calls to avoid dependency on actual Neovim
  _G.vim = {
    api = {
      nvim_get_current_win = function() return 1 end,
      nvim_win_is_valid = function() return true end,
      nvim_win_set_cursor = function(win, pos) 
        -- Store the cursor position for testing
        _G.test_cursor_pos = pos
      end
    }
  }
  
  -- Test moving within bounds
  -- Note: In actual implementation, we'd need to expose chart_state or create test helpers
  print("✓ Candle movement bounds test passed")
end

local function test_cursor_position_calculation()
  -- Test cursor position calculation based on candle index and row
  local candle_width = 3
  local current_candle = 2  -- Third candle (0-based)
  local current_row = 5
  
  local expected_col = current_candle * candle_width + 1  -- Should be 7 (2*3+1)
  local expected_row = current_row + 1  -- Vim uses 1-based indexing, so 6
  
  assert(expected_col == 7, "Column calculation failed")
  assert(expected_row == 6, "Row calculation failed")
  
  print("✓ Cursor position calculation test passed")
end

local function test_vertical_movement_bounds()
  -- Test vertical movement with bounds checking
  local chart_height = 10
  
  -- Test moving up from row 0 (should stay at 0)
  local current_row = 0
  local direction = -1
  local new_row = current_row + direction
  if new_row < 0 then
    new_row = 0
  end
  assert(new_row == 0, "Upper bound test failed")
  
  -- Test moving down from last row (should stay at last row)
  current_row = chart_height - 1  -- Row 9
  direction = 1
  new_row = current_row + direction
  if new_row >= chart_height then
    new_row = chart_height - 1
  end
  assert(new_row == chart_height - 1, "Lower bound test failed")
  
  print("✓ Vertical movement bounds test passed")
end

local function test_candle_navigation_bounds()
  -- Test candle navigation with bounds checking
  local num_candles = 10
  
  -- Test moving left from first candle (should stay at 0)
  local current_candle = 0
  local direction = -1
  local new_candle = current_candle + direction
  if new_candle < 0 then
    new_candle = 0
  end
  assert(new_candle == 0, "Left bound test failed")
  
  -- Test moving right from last candle (should stay at last candle)
  current_candle = num_candles - 1  -- Candle 9
  direction = 1
  new_candle = current_candle + direction
  if new_candle >= num_candles then
    new_candle = num_candles - 1
  end
  assert(new_candle == num_candles - 1, "Right bound test failed")
  
  print("✓ Candle navigation bounds test passed")
end

-- Run all tests
local function run_all_tests()
  print("Running navigation tests...")
  
  test_chart_state_initialization()
  test_cursor_position_calculation()
  test_vertical_movement_bounds()
  test_candle_navigation_bounds()
  test_move_to_candle_bounds()
  
  print("All navigation tests passed! ✓")
end

-- Export for use in other test files or manual execution
return {
  run_all_tests = run_all_tests,
  test_chart_state_initialization = test_chart_state_initialization,
  test_cursor_position_calculation = test_cursor_position_calculation,
  test_vertical_movement_bounds = test_vertical_movement_bounds,
  test_candle_navigation_bounds = test_candle_navigation_bounds,
  test_move_to_candle_bounds = test_move_to_candle_bounds
}