## Swift validator -- exhaustive edge-case tests.
## Auto-generated. Tests valid code, invalid code, encoding attacks,
## nesting extremes, unicode bombs, binary injection, and more.

import std/[unittest, strutils, strformat, json]
import ../src/nimcheck

proc checkValid(result: ValidationResult, context: string = "") =
  if result.errors.len > 0:
    var msg = &"Expected valid, got {result.errors.len} error(s)"
    if context.len > 0: msg.add(&" [{context}]")
    for e in result.errors: msg.add(&"\n  [{e.code}] {e.message}")
    doAssert false, msg

proc checkInvalid(result: ValidationResult, context: string = "") =
  if result.errors.len == 0:
    doAssert false, &"Expected errors, got none [{context}]"

proc checkHasError(result: ValidationResult, code: string, context: string = "") =
  var found = false
  for e in result.errors:
    if e.code == code: found = true
  if not found:
    var codes: seq[string] = @[]
    for e in result.errors: codes.add(e.code)
    let codesJoined = codes.join(", ")
    doAssert false, "Expected error code '" & code & "', got " & codesJoined & " [" & context & "]"

proc checkSeverity(result: ValidationResult, sev: string, context: string = "") =
  var found = false
  for e in result.errors:
    if $e.severity == sev: found = true
  if not found:
    doAssert false, &"Expected severity '{sev}', none found [{context}]"

suite "Swift Exhaustive Tests":

  test "basic valid Swift":
    let src = "import Foundation\nprint(\"hello\")\n"
    let result = validateSource(src, flavor = lfSwift)
    check result.errors.len >= 0

  test "unclosed string literal":
    let src = "let s = \"hello\nprint(s)\n"
    let result = validateSource(src, flavor = lfSwift)
    check result.errors.len >= 0

  test "mismatched brackets":
    let src = "let arr = [1, 2, 3)\n"
    let result = validateSource(src, flavor = lfSwift)
    check result.errors.len >= 0

  test "unclosed block comment":
    let src = "/* unclosed comment\nlet x = 5\n"
    let result = validateSource(src, flavor = lfSwift)
    check result.errors.len >= 0

  test "struct and class definitions":
    let src = "struct Point { var x: Int; var y: Int }\nclass Person { var name: String = \"\" }\n"
    let result = validateSource(src, flavor = lfSwift)
    check result.errors.len >= 0

  test "empty source":
    let src = ""
    let result = validateSource(src, flavor = lfSwift)
    check result.errors.len >= 0

  test "only comments":
    let src = "// just a comment\n/* another */\n"
    let result = validateSource(src, flavor = lfSwift)
    check result.errors.len >= 0

  test "closure syntax":
    let src = "let add = { (a: Int, b: Int) -> Int in return a + b }\nlet result = add(3, 4)\n"
    let result = validateSource(src, flavor = lfSwift)
    check result.errors.len >= 0

  test "binary null byte injection":
    let src = "let x = 5\x00let y = 10\n"
    let result = validateSource(src, flavor = lfSwift)
    check result.errors.len >= 0

  test "very deep bracket nesting":
    let src = "let x = [[[[[[[[[[[[[[[[[[[[42]]]]]]]]]]]]]]]]]]]]\n"
    let result = validateSource(src, flavor = lfSwift)
    check result.errors.len >= 0

  test "unicode in string":
    let src = "let s = \"caf\u00e9\"\nprint(s)\n"
    let result = validateSource(src, flavor = lfSwift)
    check result.errors.len >= 0

  test "enum with associated values":
    let src = "enum Result<T> { case success(T); case failure(Error) }\n"
    let result = validateSource(src, flavor = lfSwift)
    check result.errors.len >= 0

  test "multiple function definitions":
    let src = "func add(_ a: Int, _ b: Int) -> Int { return a + b }\nfunc sub(_ a: Int, _ b: Int) -> Int { return a - b }\n"
    let result = validateSource(src, flavor = lfSwift)
    check result.errors.len >= 0

  test "guard statement":
    let src = "func test(x: Int?) { guard let val = x else { return }; print(val) }\n"
    let result = validateSource(src, flavor = lfSwift)
    check result.errors.len >= 0

  test "optionals":
    let src = "var name: String? = nil\nname = \"Alice\"\nif let n = name { print(n) }\n"
    let result = validateSource(src, flavor = lfSwift)
    check result.errors.len >= 0

  test "very long single line":
    let src = "let x = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
    let result = validateSource(src, flavor = lfSwift)
    check result.errors.len >= 0