import fs from 'node:fs';


const file = fs.readFileSync('./2025/inputs/7').toString();
const lines = file.split("\n").map(e => e.split(""))


const table: Node[][] = []
const nodes: Node[] = []

class Node {
    isBeam = false
    isSplitter = false
    hasSplit = false
    constructor(public x: number, public y: number, public character: string) {
        if (this.character == "^") {
            this.isSplitter = true
        }
        if (this.character == "S") {
            this.isBeam = true
        }
        nodes.push(this)
    }
    toString() {
        if (this.isSplitter) { return "^" }
        if (this.isBeam) { return "|" }
        return "."
    }
}

table.push(...lines.map((l, i) => l.map((e, j) => new Node(j, i, e))))


table.forEach((line, lineN) => {
    if (lineN == 0) {
        return
    }
    line.forEach((node, colN) => {
        if (!table[lineN - 1][colN].isBeam) { return }
        if (!node.isSplitter) {
            node.isBeam = true
            return
        }
        let s = 0
        if (colN != 0) {
            if (!table[lineN][colN - 1].isBeam) {
                node.hasSplit = true
                table[lineN][colN - 1].isBeam = true
            }
        }
        if (colN + 1 < line.length) {
            if (!table[lineN][colN + 1].isBeam) {
                node.hasSplit = true
                table[lineN][colN + 1].isBeam = true
            }
        }
    })
})

console.log(nodes.reduce((acc, n) => {
    if (n.hasSplit) {
        acc++
    }
    return acc
}, 0))