param(
    [string]$SkillFile = "Unity/Assets/Scripts/TH1_Logic/Skill/AllSkill/HakureiNorwayHeroSkill.cs",
    [string]$UnitLogicFile = "Unity/Assets/Scripts/TH1_Logic/Unit/UnitLogic.cs"
)

$ErrorActionPreference = "Stop"

$repoRoot = git rev-parse --show-toplevel 2>$null
if (-not $repoRoot) {
    throw "Not inside a git repository."
}
$repoRoot = [System.IO.Path]::GetFullPath($repoRoot.Trim())

function Read-RepoFile([string]$relativePath) {
    $fullPath = Join-Path $repoRoot $relativePath
    if (-not (Test-Path -LiteralPath $fullPath)) {
        throw "Required file not found: $fullPath"
    }
    return Get-Content -LiteralPath $fullPath -Raw -Encoding UTF8
}

function Assert-Contains([string]$text, [string]$needle, [string]$label) {
    if (-not $text.Contains($needle)) {
        throw "Suika falling splash targeting guardrail failed: $label missing '$needle'."
    }
}

$skillText = Read-RepoFile $SkillFile
$unitLogicText = Read-RepoFile $UnitLogicFile

Assert-Contains $skillText 'private static bool CanUseGridAsSuikaFallingSplashTarget' 'shared target grid predicate'
Assert-Contains $skillText 'grid.Terrain is TerrainType.ShallowSea or TerrainType.DeepSea' 'water target rejection'
Assert-Contains $skillText 'public static bool IsSuikaFallingSplashAttackAttempt' 'falling splash attack attempt predicate'
Assert-Contains $skillText 'public override bool IsCanAttackTargetUnit' 'authoritative UnitAttack CheckCan gate'
Assert-Contains $unitLogicText 'HakureiNorwayHeroSkillUtil.CanSuikaFlyAttackTarget' 'move/attack UI and AI entrypoint'

$flyGridMethod = [regex]::Match($skillText, '(?ms)public static bool CanSuikaFlyToGrid\(MapData map, UnitData suika, GridData target\).*?^\s*public static bool CanSuikaFlyAttackTarget')
if (-not $flyGridMethod.Success) {
    throw "Suika falling splash targeting guardrail failed: cannot locate CanSuikaFlyToGrid body."
}
if ($flyGridMethod.Value -notmatch 'CanUseGridAsSuikaFallingSplashTarget\(map, suika, target\)[\s\S]*?CanUnitLandOnGrid\(map, suika, target\)') {
    throw "Suika falling splash targeting guardrail failed: ground-target path must reject water before landing/occupancy checks."
}

$flyAttackMethod = [regex]::Match($skillText, '(?ms)public static bool CanSuikaFlyAttackTarget\(MapData map, UnitData suika, UnitData target\).*?^\s*public static bool IsSuikaFallingSplashAttackAttempt')
if (-not $flyAttackMethod.Success) {
    throw "Suika falling splash targeting guardrail failed: cannot locate CanSuikaFlyAttackTarget body."
}
if ($flyAttackMethod.Value -notmatch 'IsSuikaFallingSplashAttackAttempt\(map, suika, target, out var targetGrid\)[\s\S]*?CanUseGridAsSuikaFallingSplashTarget\(map, suika, targetGrid\)') {
    throw "Suika falling splash targeting guardrail failed: unit-target path must reuse the same water target predicate."
}

$skillClassMethod = [regex]::Match($skillText, '(?ms)public partial class SuikaFallingSplashSkill.*?^\s*public partial class SuikaThrowReadySkill')
if (-not $skillClassMethod.Success) {
    throw "Suika falling splash targeting guardrail failed: cannot locate SuikaFallingSplashSkill body."
}
if ($skillClassMethod.Value -notmatch 'public override bool IsCanAttackTargetUnit\(MapData map, UnitData self, UnitData target\)[\s\S]*?IsSuikaFallingSplashAttackAttempt\(map, self, target, out _\)[\s\S]*?CanSuikaFlyAttackTarget\(map, self, target\)') {
    throw "Suika falling splash targeting guardrail failed: SuikaFallingSplashSkill must block invalid falling-splash UnitAttack params in CheckCan."
}

Write-Host "Suika falling splash targeting guardrail passed."