extends GutTest

## Unit tests for Player.gd

var player: Player


func before_each():
	player = Player.new(0, "Test Player")


## Initialization Tests

func test_initialization():
	assert_eq(player.player_index, 0)
	assert_eq(player.player_name, "Test Player")
	assert_not_null(player.deck)
	assert_not_null(player.hand)
	assert_not_null(player.field_forwards)
	assert_not_null(player.field_backups)
	assert_not_null(player.damage_zone)
	assert_not_null(player.break_zone)
	assert_not_null(player.cp_pool)


func test_default_name():
	var player1 = Player.new(0)
	var player2 = Player.new(1)

	assert_eq(player1.player_name, "Player 1")
	assert_eq(player2.player_name, "Player 2")


func test_zones_have_correct_owner():
	assert_eq(player.deck.owner_index, 0)
	assert_eq(player.hand.owner_index, 0)
	assert_eq(player.field_forwards.owner_index, 0)


func test_constants():
	assert_eq(Player.MAX_HAND_SIZE, 5)
	assert_eq(Player.MAX_BACKUPS, 5)
	assert_eq(Player.DAMAGE_TO_LOSE, 7)


## Drawing Tests

func test_draw_cards():
	# Manually add cards to deck
	for i in range(10):
		var card = CardInstance.new(TestCardData.create_forward("c" + str(i), "Card " + str(i)), 0)
		player.deck.add_card(card)

	var drawn = player.draw_cards(5)

	assert_eq(drawn.size(), 5)
	assert_eq(player.hand.get_count(), 5)
	assert_eq(player.deck.get_count(), 5)


func test_draw_from_empty_deck():
	var drawn = player.draw_cards(3)

	assert_eq(drawn.size(), 0)
	assert_eq(player.hand.get_count(), 0)


func test_draw_partial_deck():
	for i in range(2):
		var card = CardInstance.new(TestCardData.create_forward("c" + str(i)), 0)
		player.deck.add_card(card)

	var drawn = player.draw_cards(5)  # Try to draw 5, only 2 available

	assert_eq(drawn.size(), 2)
	assert_eq(player.hand.get_count(), 2)
	assert_eq(player.deck.get_count(), 0)


func test_can_draw():
	assert_false(player.can_draw())

	player.deck.add_card(CardInstance.new(TestCardData.create_forward(), 0))

	assert_true(player.can_draw())


## CP Generation Tests

func test_discard_for_cp():
	var card = CardInstance.new(TestCardData.create_forward("test", "Test Card", Enums.Element.FIRE), 0)
	player.hand.add_card(card)

	var result = player.discard_for_cp(card)

	assert_true(result)
	assert_eq(player.hand.get_count(), 0)
	assert_eq(player.break_zone.get_count(), 1)
	assert_eq(player.cp_pool.get_cp(Enums.Element.FIRE), 2)


func test_discard_for_cp_generates_correct_element():
	var ice_card = CardInstance.new(TestCardData.create_forward("test", "Ice Card", Enums.Element.ICE), 0)
	player.hand.add_card(ice_card)

	player.discard_for_cp(ice_card)

	assert_eq(player.cp_pool.get_cp(Enums.Element.ICE), 2)
	assert_eq(player.cp_pool.get_cp(Enums.Element.FIRE), 0)


func test_discard_light_card_for_cp_fails():
	var card = CardInstance.new(TestCardData.create_light_forward(), 0)
	player.hand.add_card(card)

	var result = player.discard_for_cp(card)

	assert_false(result)
	assert_eq(player.hand.get_count(), 1)  # Still in hand
	assert_eq(player.cp_pool.get_total_cp(), 0)


func test_discard_dark_card_for_cp_fails():
	var card = CardInstance.new(TestCardData.create_dark_forward(), 0)
	player.hand.add_card(card)

	var result = player.discard_for_cp(card)

	assert_false(result)
	assert_eq(player.hand.get_count(), 1)


func test_discard_card_not_in_hand_fails():
	var card = CardInstance.new(TestCardData.create_forward(), 0)
	# Don't add to hand

	var result = player.discard_for_cp(card)

	assert_false(result)


func test_dull_backup_for_cp():
	var backup = CardInstance.new(TestCardData.create_backup("test", "Test Backup", Enums.Element.ICE), 0)
	player.field_backups.add_card(backup)

	var result = player.dull_backup_for_cp(backup)

	assert_true(result)
	assert_true(backup.is_dull())
	assert_eq(player.cp_pool.get_cp(Enums.Element.ICE), 1)


func test_dull_already_dull_backup_fails():
	var backup = CardInstance.new(TestCardData.create_backup(), 0)
	backup.dull()
	player.field_backups.add_card(backup)

	var result = player.dull_backup_for_cp(backup)

	assert_false(result)


func test_dull_forward_for_cp_fails():
	var forward = CardInstance.new(TestCardData.create_forward(), 0)
	player.field_backups.add_card(forward)  # Incorrectly in backups zone

	var result = player.dull_backup_for_cp(forward)

	assert_false(result)  # is_backup() check fails


func test_dull_backup_not_on_field_fails():
	var backup = CardInstance.new(TestCardData.create_backup(), 0)
	player.hand.add_card(backup)  # In hand, not on field

	var result = player.dull_backup_for_cp(backup)

	assert_false(result)


## Card Play Tests - Forward

func test_play_forward_card():
	var card = CardInstance.new(TestCardData.create_forward("test", "Test Forward", Enums.Element.FIRE, 3), 0)
	player.hand.add_card(card)
	player.cp_pool.add_cp(Enums.Element.FIRE, 3)

	var spent = player.play_card(card)

	assert_false(spent.is_empty())
	assert_eq(player.hand.get_count(), 0)
	assert_eq(player.field_forwards.get_count(), 1)
	assert_true(card.is_active())


func test_play_forward_calls_entered_field():
	var card = CardInstance.new(TestCardData.create_forward("test", "Test Forward", Enums.Element.FIRE, 3), 0)
	card.turns_on_field = 5  # Artificially set
	player.hand.add_card(card)
	player.cp_pool.add_cp(Enums.Element.FIRE, 3)

	player.play_card(card)

	assert_eq(card.turns_on_field, 0)  # Reset by entered_field


## Card Play Tests - Backup

func test_play_backup_enters_dull():
	var card = CardInstance.new(TestCardData.create_backup("test", "Test Backup", Enums.Element.EARTH, 2), 0)
	player.hand.add_card(card)
	player.cp_pool.add_cp(Enums.Element.EARTH, 2)

	player.play_card(card)

	assert_eq(player.field_backups.get_count(), 1)
	assert_true(card.is_dull())  # Backups enter dull


func test_play_card_insufficient_cp():
	var card = CardInstance.new(TestCardData.create_forward("test", "Test Forward", Enums.Element.FIRE, 3), 0)
	player.hand.add_card(card)
	player.cp_pool.add_cp(Enums.Element.FIRE, 1)  # Not enough

	var spent = player.play_card(card)

	assert_true(spent.is_empty())
	assert_eq(player.hand.get_count(), 1)  # Still in hand
	assert_eq(player.field_forwards.get_count(), 0)


func test_play_card_not_in_hand():
	var card = CardInstance.new(TestCardData.create_forward("test", "Test Forward", Enums.Element.FIRE, 3), 0)
	# Don't add to hand
	player.cp_pool.add_cp(Enums.Element.FIRE, 5)

	var spent = player.play_card(card)

	assert_true(spent.is_empty())


## Field Limit Tests

func test_max_backups_limit():
	# Fill backup field
	for i in range(5):
		var backup = CardInstance.new(TestCardData.create_backup("b" + str(i), "Backup " + str(i), Enums.Element.FIRE, 1, true), 0)
		player.field_backups.add_card(backup)

	# Try to play 6th backup
	var sixth_backup = CardInstance.new(TestCardData.create_backup("b5", "Backup 6", Enums.Element.FIRE, 1, true), 0)
	player.hand.add_card(sixth_backup)
	player.cp_pool.add_cp(Enums.Element.FIRE, 2)

	var spent = player.play_card(sixth_backup)

	assert_true(spent.is_empty())
	assert_eq(player.field_backups.get_count(), 5)
	assert_eq(player.hand.get_count(), 1)  # Still in hand


## Unique Name Restriction Tests

func test_unique_name_restriction_forwards():
	var cloud1 = CardInstance.new(TestCardData.create_forward("c1", "Cloud", Enums.Element.FIRE, 2, 5000, false), 0)
	player.field_forwards.add_card(cloud1)

	var cloud2 = CardInstance.new(TestCardData.create_forward("c2", "Cloud", Enums.Element.FIRE, 2, 5000, false), 0)
	player.hand.add_card(cloud2)
	player.cp_pool.add_cp(Enums.Element.FIRE, 3)

	var spent = player.play_card(cloud2)

	assert_true(spent.is_empty())  # Can't play same name


func test_unique_name_restriction_backups():
	var aerith1 = CardInstance.new(TestCardData.create_backup("a1", "Aerith", Enums.Element.EARTH, 2, false), 0)
	player.field_backups.add_card(aerith1)

	var aerith2 = CardInstance.new(TestCardData.create_backup("a2", "Aerith", Enums.Element.EARTH, 2, false), 0)
	player.hand.add_card(aerith2)
	player.cp_pool.add_cp(Enums.Element.EARTH, 3)

	var spent = player.play_card(aerith2)

	assert_true(spent.is_empty())


func test_unique_name_restriction_cross_zone():
	# Cloud as forward
	var cloud_forward = CardInstance.new(TestCardData.create_forward("cf", "Cloud", Enums.Element.FIRE, 3, 5000, false), 0)
	player.field_forwards.add_card(cloud_forward)

	# Try to play Cloud as backup (same name)
	var cloud_backup = CardInstance.new(TestCardData.create_backup("cb", "Cloud", Enums.Element.FIRE, 2, false), 0)
	player.hand.add_card(cloud_backup)
	player.cp_pool.add_cp(Enums.Element.FIRE, 3)

	var spent = player.play_card(cloud_backup)

	assert_true(spent.is_empty())


func test_generic_cards_can_share_names():
	var mog1 = CardInstance.new(TestCardData.create_forward("m1", "Moogle", Enums.Element.WIND, 1, 3000, true), 0)
	player.field_forwards.add_card(mog1)

	var mog2 = CardInstance.new(TestCardData.create_forward("m2", "Moogle", Enums.Element.WIND, 1, 3000, true), 0)
	player.hand.add_card(mog2)
	player.cp_pool.add_cp(Enums.Element.WIND, 2)

	var spent = player.play_card(mog2)

	assert_false(spent.is_empty())  # Generic cards allowed
	assert_eq(player.field_forwards.get_count(), 2)


## Light/Dark Restriction Tests

func test_light_dark_restriction():
	var light1 = CardInstance.new(TestCardData.create_light_forward("l1", "Light Forward 1", 3, 7000), 0)
	player.field_forwards.add_card(light1)

	var light2 = CardInstance.new(TestCardData.create_light_forward("l2", "Light Forward 2", 3, 7000), 0)
	player.hand.add_card(light2)
	player.cp_pool.add_cp(Enums.Element.FIRE, 5)

	var spent = player.play_card(light2)

	assert_true(spent.is_empty())  # Can't have two Light/Dark cards


func test_light_dark_restriction_dark_after_light():
	var light = CardInstance.new(TestCardData.create_light_forward("l", "Light Forward", 3, 7000), 0)
	player.field_forwards.add_card(light)

	var dark = CardInstance.new(TestCardData.create_dark_forward("d", "Dark Forward", 3, 7000), 0)
	player.hand.add_card(dark)
	player.cp_pool.add_cp(Enums.Element.FIRE, 5)

	var spent = player.play_card(dark)

	assert_true(spent.is_empty())


func test_light_dark_restriction_backup_zone():
	var light_backup = CardInstance.new(TestCardData.create_backup("lb", "Light Backup", Enums.Element.LIGHT, 2), 0)
	player.field_backups.add_card(light_backup)

	var light_forward = CardInstance.new(TestCardData.create_light_forward("lf", "Light Forward", 3, 7000), 0)
	player.hand.add_card(light_forward)
	player.cp_pool.add_cp(Enums.Element.FIRE, 5)

	var spent = player.play_card(light_forward)

	assert_true(spent.is_empty())  # Light in backups blocks light forward


## Damage Tests

func test_take_damage():
	for i in range(10):
		var card = CardInstance.new(TestCardData.create_forward("d" + str(i)), 0)
		player.deck.add_card(card)

	var damage_cards = player.take_damage(3)

	assert_eq(damage_cards.size(), 3)
	assert_eq(player.damage_zone.get_count(), 3)
	assert_eq(player.deck.get_count(), 7)


func test_take_damage_from_empty_deck():
	var damage_cards = player.take_damage(3)

	assert_eq(damage_cards.size(), 0)
	assert_eq(player.damage_zone.get_count(), 0)


func test_take_damage_partial_deck():
	for i in range(2):
		var card = CardInstance.new(TestCardData.create_forward("d" + str(i)), 0)
		player.deck.add_card(card)

	var damage_cards = player.take_damage(5)  # Try 5, only 2 in deck

	assert_eq(damage_cards.size(), 2)
	assert_eq(player.damage_zone.get_count(), 2)


func test_has_lost():
	for i in range(10):
		var card = CardInstance.new(TestCardData.create_forward("d" + str(i)), 0)
		player.deck.add_card(card)

	player.take_damage(6)
	assert_false(player.has_lost())

	player.take_damage(1)
	assert_true(player.has_lost())


func test_get_damage_count():
	for i in range(5):
		var card = CardInstance.new(TestCardData.create_forward("d" + str(i)), 0)
		player.deck.add_card(card)

	player.take_damage(3)

	assert_eq(player.get_damage_count(), 3)


## Break Card Tests

func test_break_forward():
	var card = CardInstance.new(TestCardData.create_forward(), 0)
	player.field_forwards.add_card(card)

	var result = player.break_card(card)

	assert_true(result)
	assert_eq(player.field_forwards.get_count(), 0)
	assert_eq(player.break_zone.get_count(), 1)


func test_break_backup():
	var card = CardInstance.new(TestCardData.create_backup(), 0)
	player.field_backups.add_card(card)

	var result = player.break_card(card)

	assert_true(result)
	assert_eq(player.field_backups.get_count(), 0)
	assert_eq(player.break_zone.get_count(), 1)


func test_break_card_not_on_field():
	var card = CardInstance.new(TestCardData.create_forward(), 0)
	player.hand.add_card(card)

	var result = player.break_card(card)

	assert_false(result)


## Turn Cleanup Tests

func test_activate_all():
	var forward = CardInstance.new(TestCardData.create_forward("f", "Forward"), 0)
	var backup = CardInstance.new(TestCardData.create_backup("b", "Backup"), 0)
	forward.dull()
	backup.dull()
	player.field_forwards.add_card(forward)
	player.field_backups.add_card(backup)

	player.activate_all()

	assert_true(forward.is_active())
	assert_true(backup.is_active())


func test_discard_to_hand_limit():
	# Add 8 cards to hand
	for i in range(8):
		var card = CardInstance.new(TestCardData.create_forward("h" + str(i)), 0)
		player.hand.add_card(card)

	var discarded = player.discard_to_hand_limit()

	assert_eq(discarded.size(), 3)
	assert_eq(player.hand.get_count(), 5)
	assert_eq(player.break_zone.get_count(), 3)


func test_discard_to_hand_limit_already_under():
	for i in range(3):
		var card = CardInstance.new(TestCardData.create_forward("h" + str(i)), 0)
		player.hand.add_card(card)

	var discarded = player.discard_to_hand_limit()

	assert_eq(discarded.size(), 0)
	assert_eq(player.hand.get_count(), 3)


func test_end_turn_cleanup():
	player.cp_pool.add_cp(Enums.Element.FIRE, 3)

	var forward = CardInstance.new(TestCardData.create_forward(), 0)
	forward.power_modifiers.append(1000)
	forward.damage_received = 2000
	forward.attacked_this_turn = true
	player.field_forwards.add_card(forward)

	player.end_turn_cleanup()

	assert_eq(player.cp_pool.get_total_cp(), 0)
	assert_eq(forward.power_modifiers.size(), 0)
	assert_eq(forward.damage_received, 0)
	assert_false(forward.attacked_this_turn)


func test_start_turn():
	var forward = CardInstance.new(TestCardData.create_forward(), 0)
	forward.turns_on_field = 0
	player.field_forwards.add_card(forward)

	player.start_turn()

	assert_eq(forward.turns_on_field, 1)


## Query Tests

func test_get_all_field_cards():
	var forward1 = CardInstance.new(TestCardData.create_forward("f1"), 0)
	var forward2 = CardInstance.new(TestCardData.create_forward("f2"), 0)
	var backup = CardInstance.new(TestCardData.create_backup("b"), 0)
	player.field_forwards.add_card(forward1)
	player.field_forwards.add_card(forward2)
	player.field_backups.add_card(backup)

	var all_cards = player.get_all_field_cards()

	assert_eq(all_cards.size(), 3)


func test_get_attackable_forwards():
	var can_attack = CardInstance.new(TestCardData.create_forward("a"), 0)
	can_attack.turns_on_field = 1

	var cannot_attack_dull = CardInstance.new(TestCardData.create_forward("b"), 0)
	cannot_attack_dull.turns_on_field = 1
	cannot_attack_dull.dull()

	var cannot_attack_sickness = CardInstance.new(TestCardData.create_forward("c"), 0)
	cannot_attack_sickness.turns_on_field = 0

	player.field_forwards.add_card(can_attack)
	player.field_forwards.add_card(cannot_attack_dull)
	player.field_forwards.add_card(cannot_attack_sickness)

	var attackers = player.get_attackable_forwards()

	assert_eq(attackers.size(), 1)
	assert_eq(attackers[0], can_attack)


func test_get_blockable_forwards():
	var can_block = CardInstance.new(TestCardData.create_forward("a"), 0)

	var cannot_block_dull = CardInstance.new(TestCardData.create_forward("b"), 0)
	cannot_block_dull.dull()

	player.field_forwards.add_card(can_block)
	player.field_forwards.add_card(cannot_block_dull)

	var blockers = player.get_blockable_forwards()

	assert_eq(blockers.size(), 1)
	assert_eq(blockers[0], can_block)


## Summon Tests

func test_cast_summon():
	var summon = CardInstance.new(TestCardData.create_summon("s", "Test Summon", Enums.Element.FIRE, 2), 0)
	player.hand.add_card(summon)
	player.cp_pool.add_cp(Enums.Element.FIRE, 2)

	var cast = player.cast_summon(summon)

	assert_eq(cast, summon)
	assert_eq(player.hand.get_count(), 0)


func test_cast_summon_insufficient_cp():
	var summon = CardInstance.new(TestCardData.create_summon("s", "Test Summon", Enums.Element.FIRE, 2), 0)
	player.hand.add_card(summon)
	player.cp_pool.add_cp(Enums.Element.FIRE, 1)

	var cast = player.cast_summon(summon)

	assert_null(cast)
	assert_eq(player.hand.get_count(), 1)


func test_cast_non_summon_fails():
	var forward = CardInstance.new(TestCardData.create_forward(), 0)
	player.hand.add_card(forward)
	player.cp_pool.add_cp(Enums.Element.FIRE, 5)

	var cast = player.cast_summon(forward)

	assert_null(cast)