local dap = require 'dap'
local dapui = require 'dapui'

-- Basic debugging keymaps, feel free to change to your liking!
vim.keymap.set('n', '<F5>', dap.continue, {desc = 'Debug: Start/Continue'})
vim.keymap.set('n', '<F1>', dap.step_into, {desc = 'Debug: Step Into'})
vim.keymap.set('n', '<F2>', dap.step_over, {desc = 'Debug: Step Over'})
vim.keymap.set('n', '<F3>', dap.step_out, {desc = 'Debug: Step Out'})
vim.keymap.set('n', '<leader>b', dap.toggle_breakpoint,
               {desc = 'Debug: Toggle Breakpoint'})
vim.keymap.set('n', '<leader>B', function()
    dap.set_breakpoint(vim.fn.input 'Breakpoint condition: ')
end, {desc = 'Debug: Set Breakpoint'})

-- Toggle to see last session result. Without this, you can't see session output in case of unhandled exception.
vim.keymap.set('n', '<F7>', dapui.toggle,
               {desc = 'Debug: See last session result.'})

dap.listeners.after.event_initialized['dapui_config'] = dapui.open
dap.listeners.before.event_terminated['dapui_config'] = dapui.close
dap.listeners.before.event_exited['dapui_config'] = dapui.close

-- Dap UI setup
-- For more information, see |:help nvim-dap-ui|
dapui.setup {
    -- Set icons to characters that are more likely to work in every terminal.
    --    Feel free to remove or use ones that you like more! :)
    --    Don't feel like these are good choices.
    icons = {expanded = '▾', collapsed = '▸', current_frame = '*'},
    controls = {
        icons = {
            pause = '⏸',
            play = '▶',
            step_into = '⏎',
            step_over = '⏭',
            step_out = '⏮',
            step_back = 'b',
            run_last = '▶▶',
            terminate = '⏹',
            disconnect = '⏏'
        }
    }
}

require("nvim-dap-virtual-text").setup {
    enabled = true, -- enable this plugin (the default)
    enabled_commands = true, -- create commands DapVirtualTextEnable, DapVirtualTextDisable, DapVirtualTextToggle, (DapVirtualTextForceRefresh for refreshing when debug adapter did not notify its termination)
    highlight_changed_variables = true, -- highlight changed values with NvimDapVirtualTextChanged, else always NvimDapVirtualText
    highlight_new_as_changed = false, -- highlight new variables in the same way as changed variables (if highlight_changed_variables)
    show_stop_reason = true, -- show stop reason when stopped for exceptions
    commented = false, -- prefix virtual text with comment string
    only_first_definition = true, -- only show virtual text at first definition (if there are multiple)
    all_references = false, -- show virtual text on all all references of the variable (not only definitions)
    clear_on_continue = false, -- clear virtual text on "continue" (might cause flickering when stepping)
    --- A callback that determines how a variable is displayed or whether it should be omitted
    --- variable Variable https://microsoft.github.io/debug-adapter-protocol/specification#Types_Variable
    --- buf number
    --- stackframe dap.StackFrame https://microsoft.github.io/debug-adapter-protocol/specification#Types_StackFrame
    --- node userdata tree-sitter node identified as variable definition of reference (see `:h tsnode`)
    --- options nvim_dap_virtual_text_options Current options for nvim-dap-virtual-text
    --- string|nil A text how the virtual text should be displayed or nil, if this variable shouldn't be displayed
    display_callback = function(variable, buf, stackframe, node, options)
        if options.virt_text_pos == 'inline' then
            return ' = ' .. variable.value
        else
            return variable.name .. ' = ' .. variable.value
        end
    end,
    -- position of virtual text, see `:h nvim_buf_set_extmark()`, default tries to inline the virtual text. Use 'eol' to set to end of line
    virt_text_pos = vim.fn.has 'nvim-0.10' == 1 and 'inline' or 'eol',

    -- experimental features:
    all_frames = false, -- show virtual text for all stack frames not only current. Only works for debugpy on my machine.
    virt_lines = false, -- show virtual lines instead of virtual text (will flicker!)
    virt_text_win_col = nil -- position the virtual text at a fixed window column (starting from the first text column) ,
    -- e.g. 80 to position at column 80, see `:h nvim_buf_set_extmark()`
}

-- Install lang specific config
-- check language categories, require file with debugger setup in it.
