require("tests")
local kv = require("kv")

-- Clean up any existing test files
os.remove("test_store.json")
os.remove("test_store.txt")
os.remove("test_oop.json")
os.remove("test_temp.json")

-- ======================================================================
-- BASIC OPERATIONS
-- ======================================================================

test("Store creation and opening", function()
	assert(kv.open("test", "test_store.json"))
	assert(kv.open("memory_only", ""))
	assert(not kv.open("", "test.json")) -- Empty name should fail
end)

test("Set and get operations", function()
	assert(kv.set("test", "key1", "value1"))
	assert_equal("value1", kv.get("test", "key1"))
	assert_equal("default", kv.get("test", "nonexistent", "default"))
	assert_equal(nil, kv.get("test", "nonexistent"))

	-- Test with special characters
	assert(kv.set("test", "special:key", "value with spaces & symbols!"))
	assert_equal("value with spaces & symbols!", kv.get("test", "special:key"))
end)

test("Key existence and deletion", function()
	kv.set("test", "temp_key", "temp_value")
	assert(kv.has("test", "temp_key"))
	assert(not kv.has("test", "missing_key"))

	assert(kv.delete("test", "temp_key"))
	assert(not kv.has("test", "temp_key"))
	assert(not kv.delete("test", "missing_key"))
end)

test("Store size tracking", function()
	kv.clear("test")
	assert_equal(0, kv.size("test"))

	kv.set("test", "k1", "v1")
	kv.set("test", "k2", "v2")
	kv.set("test", "k3", "v3")
	assert_equal(3, kv.size("test"))

	kv.delete("test", "k2")
	assert_equal(2, kv.size("test"))
end)

test("Keys and values retrieval", function()
	kv.clear("test")
	kv.set("test", "a", "apple")
	kv.set("test", "b", "banana")
	kv.set("test", "c", "cherry")

	local keys = kv.keys("test")
	local values = kv.values("test")

	assert_equal(3, #keys)
	assert_equal(3, #values)

	-- Check all keys exist
	local key_set = {}
	for _, k in ipairs(keys) do
		key_set[k] = true
	end
	assert(key_set["a"] and key_set["b"] and key_set["c"])

	-- Check all values exist
	local value_set = {}
	for _, v in ipairs(values) do
		value_set[v] = true
	end
	assert(value_set["apple"] and value_set["banana"] and value_set["cherry"])
end)

test("Clear store", function()
	kv.set("test", "temp1", "value1")
	kv.set("test", "temp2", "value2")
	assert(kv.size("test") > 0)

	assert(kv.clear("test"))
	assert_equal(0, kv.size("test"))
	assert(not kv.has("test", "temp1"))
end)

test("Save and close operations", function()
	kv.set("test", "persistent", "data")
	assert(kv.save("test"))
	assert(kv.close("test"))

	-- Reopen and verify data persists
	assert(kv.open("test", "test_store.json"))
	assert_equal("data", kv.get("test", "persistent"))
end)

test("Invalid store operations", function()
	assert(not kv.set("nonexistent", "key", "value"))
	assert_equal(nil, kv.get("nonexistent", "key"))
	assert(not kv.has("nonexistent", "key"))
	assert_equal(0, kv.size("nonexistent"))
	assert(not kv.delete("nonexistent", "key"))
	assert(not kv.clear("nonexistent"))
	assert(not kv.save("nonexistent"))
	assert(not kv.close("nonexistent"))
end)

-- ======================================================================
-- OBJECT-ORIENTED INTERFACE
-- ======================================================================

test("OOP store creation", function()
	local store = kv.create("oop_test", "test_oop.json")
	assert_equal("oop_test", store.name)

	local memory_store = kv.create("memory_oop")
	assert_equal("memory_oop", memory_store.name)
end)

test("OOP basic operations", function()
	local store = kv.create("oop_basic")

	assert(store:set("foo", "bar"))
	assert_equal("bar", store:get("foo"))
	assert_equal("default", store:get("missing", "default"))
	assert(store:has("foo"))
	assert(not store:has("missing"))
	assert_equal(1, store:size())

	assert(store:delete("foo"))
	assert(not store:has("foo"))
	assert_equal(0, store:size())
end)

test("OOP collections", function()
	local store = kv.create("oop_collections")

	store:set("a", "apple")
	store:set("b", "banana")
	store:set("c", "cherry")

	local keys = store:keys()
	local values = store:values()

	assert_equal(3, #keys)
	assert_equal(3, #values)

	store:clear()
	assert_equal(0, store:size())

	store:close()
end)

-- ======================================================================
-- UTILITY FUNCTIONS
-- ======================================================================

test("Increment operations", function()
	kv.open("util_test")

	-- Increment non-existent key
	assert_equal(1, kv.increment("util_test", "counter"))
	assert_equal("1", kv.get("util_test", "counter"))

	-- Increment existing key
	assert_equal(6, kv.increment("util_test", "counter", 5))
	assert_equal("6", kv.get("util_test", "counter"))

	-- Decrement
	assert_equal(4, kv.increment("util_test", "counter", -2))

	kv.close("util_test")
end)

test("Append operations", function()
	kv.open("append_test")

	-- Append to non-existent key
	assert(kv.append("append_test", "list", "first"))
	assert_equal("first", kv.get("append_test", "list"))

	-- Append with separator
	assert(kv.append("append_test", "list", "second", ","))
	assert_equal("first,second", kv.get("append_test", "list"))

	assert(kv.append("append_test", "list", "third", ","))
	assert_equal("first,second,third", kv.get("append_test", "list"))

	kv.close("append_test")
end)

test("TTL and expiration", function()
	kv.open("ttl_test", "test_temp.json")

	kv.set("ttl_test", "temp_key", "temp_value")
	assert(kv.expire("ttl_test", "temp_key", 1)) -- 1 second TTL

	-- Key should still exist immediately
	assert(kv.has("ttl_test", "temp_key"))

	-- Wait for expiration
	os.execute("sleep 2")
	local expired = kv.cleanup_expired("ttl_test")
	assert(expired >= 1)

	-- Key should be gone
	assert(not kv.has("ttl_test", "temp_key"))

	kv.close("ttl_test")
end)

-- ======================================================================
-- FILE FORMAT TESTS
-- ======================================================================

test("JSON file format", function()
	kv.open("json_test", "test.json")
	kv.set("json_test", "key1", "value1")
	kv.set("json_test", "key2", "value2")
	kv.save("json_test")
	kv.close("json_test")

	-- Verify file exists and reload
	assert(file_exists("test.json"))
	kv.open("json_test", "test.json")
	assert_equal("value1", kv.get("json_test", "key1"))
	assert_equal("value2", kv.get("json_test", "key2"))
	kv.close("json_test")

	os.remove("test.json")
end)

test("Text file format", function()
	kv.open("txt_test", "test.txt")
	kv.set("txt_test", "setting1", "value1")
	kv.set("txt_test", "setting2", "value2")
	kv.save("txt_test")
	kv.close("txt_test")

	-- Verify file exists and reload
	assert(file_exists("test.txt"))
	kv.open("txt_test", "test.txt")
	assert_equal("value1", kv.get("txt_test", "setting1"))
	assert_equal("value2", kv.get("txt_test", "setting2"))
	kv.close("txt_test")

	os.remove("test.txt")
end)

-- ======================================================================
-- EDGE CASES AND ERROR HANDLING
-- ======================================================================

test("Empty values and keys", function()
	kv.open("edge_test")

	-- Empty value
	assert(kv.set("edge_test", "empty", ""))
	assert_equal("", kv.get("edge_test", "empty"))

	-- Unicode keys and values
	assert(kv.set("edge_test", "ключ", "значение"))
	assert_equal("значение", kv.get("edge_test", "ключ"))

	kv.close("edge_test")
end)

test("Special characters in data", function()
	kv.open("special_test")

	local special_value = 'Special chars: "quotes", \'apostrophes\', \n newlines, \t tabs, \\ backslashes'
	assert(kv.set("special_test", "special", special_value))
	assert_equal(special_value, kv.get("special_test", "special"))

	kv.close("special_test")
end)

test("Large data handling", function()
	kv.open("large_test")

	-- Large value
	local large_value = string.rep("x", 10000)
	assert(kv.set("large_test", "large", large_value))
	assert_equal(large_value, kv.get("large_test", "large"))

	-- Many keys
	for i = 1, 100 do
		kv.set("large_test", "key" .. i, "value" .. i)
	end
	assert_equal(101, kv.size("large_test")) -- 100 + 1 large value

	kv.close("large_test")
end)

-- ======================================================================
-- PERFORMANCE TESTS
-- ======================================================================

test("Performance test", function()
	kv.open("perf_test")

	local start = os.clock()

	-- Bulk insert
	for i = 1, 1000 do
		kv.set("perf_test", "key" .. i, "value" .. i)
	end
	local insert_time = os.clock() - start

	-- Bulk read
	start = os.clock()
	for i = 1, 1000 do
		local value = kv.get("perf_test", "key" .. i)
		assert_equal("value" .. i, value)
	end
	local read_time = os.clock() - start

	-- Check final size
	assert_equal(1000, kv.size("perf_test"))

	print(string.format("  Insert 1000 items: %.3fs", insert_time))
	print(string.format("  Read 1000 items: %.3fs", read_time))

	kv.close("perf_test")
end)

-- ======================================================================
-- INTEGRATION TESTS
-- ======================================================================

test("Multiple store integration", function()
	local users = kv.create("users_int")
	local cache = kv.create("cache_int")

	-- Simulate user data
	users:set("user:123", "john_doe")
	cache:set("user:123:last_seen", tostring(os.time()))

	-- Verify data in stores
	assert_equal("john_doe", users:get("user:123"))
	assert(cache:has("user:123:last_seen"))

	-- Clean up
	users:close()
	cache:close()
end)

-- Clean up test files
--os.remove("test_store.json")
--os.remove("test_oop.json")
--os.remove("test_temp.json")

summary()
test_exit()