-- tests for config module
local config = require("tiny-debugger.config")

local function assert_eq(a, b, msg)
  if a ~= b then
    error(string.format("FAIL: %s — expected %s, got %s", msg, vim.inspect(b), vim.inspect(a)))
  end
end

-- test 1: defaults unchanged after empty merge
local opts = config.merge({})
assert_eq(opts.keys.continue, "c", "default continue key")
assert_eq(opts.help_on_enter, true, "default help_on_enter")
assert_eq(opts.builtin_adapters, true, "default builtin_adapters")
assert_eq(#opts.dapui.layouts, 2, "default layout count")

-- test 2: partial key override
opts = config.merge({ keys = { continue = "g" } })
assert_eq(opts.keys.continue, "g", "overridden continue key")
assert_eq(opts.keys.step_over, "s", "preserved step_over key")
assert_eq(opts.keys.terminate, "q", "preserved terminate key")

-- test 3: disable a key with false
opts = config.merge({ keys = { continue = false } })
assert_eq(opts.keys.continue, false, "disabled continue key")
assert_eq(opts.keys.step_over, "s", "preserved step_over after disable")

-- test 4: override help_on_enter
opts = config.merge({ help_on_enter = false })
assert_eq(opts.help_on_enter, false, "overridden help_on_enter")
assert_eq(opts.keys.continue, "c", "keys preserved after help override")

-- test 5: merge doesn't mutate defaults
config.merge({ keys = { continue = "z" } })
assert_eq(config.defaults.keys.continue, "c", "defaults not mutated")

print("ALL CONFIG TESTS PASSED")