From 073b576fd854a798ba7732819a805b0b91f9c3d2 Mon Sep 17 00:00:00 2001
From: Bert Peters <bert@bertptrs.nl>
Date: Thu, 26 Dec 2024 15:13:46 +0100
Subject: [PATCH] Implement 2024 day 25 in Terraform

---
 2024/bonus/day25/main.tf    | 23 +++++++++++++++++++++++
 2024/bonus/main.tf          |  9 +++++++++
 2024/bonus/tests.tftest.hcl | 17 +++++++++++++++++
 3 files changed, 49 insertions(+)
 create mode 100644 2024/bonus/day25/main.tf

diff --git a/2024/bonus/day25/main.tf b/2024/bonus/day25/main.tf
new file mode 100644
index 0000000..a54b198
--- /dev/null
+++ b/2024/bonus/day25/main.tf
@@ -0,0 +1,23 @@
+variable "input" {
+  type = string
+}
+
+locals {
+  blocks = split("\n\n", chomp(var.input))
+  heights = [
+    for block in local.blocks : [
+      for i in range(5) : length([
+        for line in split("\n", block) : line if substr(line, i, 1) == "#"
+      ])
+    ]
+  ]
+
+  locks = [for i in range(length(local.blocks)) : local.heights[i] if startswith(local.blocks[i], "#####")]
+  keys  = [for i in range(length(local.blocks)) : local.heights[i] if !startswith(local.blocks[i], "#####")]
+
+  combined = concat([for lock in local.locks : [for key in local.keys : [for i in range(5) : lock[i] + key[i] <= 7]]]...)
+}
+
+output "part1" {
+  value = length([for combination in local.combined : combination if alltrue(combination)])
+}
diff --git a/2024/bonus/main.tf b/2024/bonus/main.tf
index 8149729..ed96c52 100644
--- a/2024/bonus/main.tf
+++ b/2024/bonus/main.tf
@@ -87,3 +87,12 @@ module "day19" {
 output "day19_1" {
   value = module.day19.part1
 }
+
+module "day25" {
+  source = "./day25"
+  input  = file("../inputs/25.txt")
+}
+
+output "day25_1" {
+  value = module.day25.part1
+}
diff --git a/2024/bonus/tests.tftest.hcl b/2024/bonus/tests.tftest.hcl
index 1fc06f1..3fc450b 100644
--- a/2024/bonus/tests.tftest.hcl
+++ b/2024/bonus/tests.tftest.hcl
@@ -164,3 +164,20 @@ run "day19" {
     error_message = "Part1 output is wrong"
   }
 }
+
+run "day25" {
+  command = plan
+
+  module {
+    source = "./day25"
+  }
+
+  variables {
+    input = file("../tests/samples/25.txt")
+  }
+
+  assert {
+    condition     = output.part1 == 3
+    error_message = "Part1 output is wrong"
+  }
+}