-- lib-core.input-test — P.3.3 test-module
-- Validates engine.input mouse surface + lib-core.input v0.4.0 (BIND_MAP + was_action_released).
-- Headless via P.3.1 test-mode pattern. 17 assertions.

local input = require("lib-core.input")

function init(ctx)
    -- Engine surface present (7 assertions)
    engine.test.assert(type(engine.input.MOUSE_LEFT)   == "number",
                       "MOUSE_LEFT constant is integer")
    engine.test.assert(type(engine.input.MOUSE_RIGHT)  == "number",
                       "MOUSE_RIGHT constant is integer")
    engine.test.assert(type(engine.input.MOUSE_MIDDLE) == "number",
                       "MOUSE_MIDDLE constant is integer")
    engine.test.assert(type(engine.input.is_mouse_down)     == "function",
                       "is_mouse_down function registered")
    engine.test.assert(type(engine.input.was_mouse_pressed) == "function",
                       "was_mouse_pressed function registered")
    engine.test.assert(type(engine.input.was_released)       == "function",
                       "was_released function registered")
    engine.test.assert(type(engine.input.was_mouse_released) == "function",
                       "was_mouse_released function registered")

    -- bind() accepts mouse-strings (1 assertion)
    input.bind("click", {"mouse_left"})
    engine.test.equals(input.action_count(), 1, "action_count == 1 after mouse bind")

    -- bind() accepts mixed key+mouse (1 assertion)
    input.bind("interact", {"e", "mouse_left"})
    engine.test.equals(input.action_count(), 2, "action_count == 2 after mixed bind")

    -- bind() rejects unknown mouse-name (atomic) (3 assertions)
    local ok, err = pcall(input.bind, "bad", {"mouse_xyz"})
    engine.test.assert(not ok, "bind('bad', {'mouse_xyz'}) raises Lua error")
    engine.test.assert(err and err:find("mouse_xyz", 1, true),
                       "error message mentions the bad string")
    engine.test.equals(input.action_count(), 2,
                       "no partial state mutation on failed bind")

    -- is_action_down / was_action_pressed / was_action_released return false in headless (4 assertions)
    engine.test.equals(input.is_action_down("click"), false,
                       "headless: unpressed mouse_left is_action_down=false")
    engine.test.equals(input.was_action_pressed("click"), false,
                       "headless: unpressed was_action_pressed=false")
    engine.test.equals(input.was_action_released("click"), false,
                       "headless: unpressed was_action_released=false")
    engine.test.equals(input.was_action_released("nonexistent_action"), false,
                       "was_action_released for unknown action returns false")

    -- Existing key-only binding still works (regression-check) (1 assertion)
    input.bind("walk_left", {"a", "left"})
    engine.test.equals(input.action_count(), 3,
                       "key-only bind still works after BIND_MAP refactor")
end