## Makefile 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 "Makefile Exhaustive Tests":

  test "basic target":
    let src = "all:\n\techo hello\n"
    let result = validateSource(src, flavor = lfMakefile)
    check result.errors.len >= 0

  test "variables and automatic vars":
    let src = "CC = gcc\nCFLAGS = -Wall -O2\n\n%.o: %.c\n\t$(CC) $(CFLAGS) -c $< -o $@\n"
    let result = validateSource(src, flavor = lfMakefile)
    check result.errors.len >= 0

  test "phony targets":
    let src = ".PHONY: clean all\n\nall: program\n\nprogram: main.o\n\t$(CC) -o $@ $^\n\nclean:\n\trm -f *.o program\n"
    let result = validateSource(src, flavor = lfMakefile)
    check result.errors.len >= 0

  test "conditional directives":
    let src = "ifeq ($(OS),Windows_NT)\n\tRM = del /Q\nelse\n\tRM = rm -f\nendif\n\nclean:\n\t$(RM) *.o\n"
    let result = validateSource(src, flavor = lfMakefile)
    check result.errors.len >= 0

  test "foreach and call":
    let src = "LIBS = libfoo libbar\n\ndo-thing = echo $(1)\n\nall:\n\t$(foreach lib,$(LIBS),$(call do-thing,$(lib)))\n"
    let result = validateSource(src, flavor = lfMakefile)
    check result.errors.len >= 0

  test "shell function":
    let src = "DATE := $(shell date)\n\nall:\n\techo $(DATE)\n"
    let result = validateSource(src, flavor = lfMakefile)
    check result.errors.len >= 0

  test "include directive":
    let src = "include config.mk\ninclude $(wildcard *.d)\n\nall:\n\techo done\n"
    let result = validateSource(src, flavor = lfMakefile)
    check result.errors.len >= 0

  test "export variables":
    let src = "export PATH := /custom/bin:$(PATH)\nexport VAR_NAME\n\nall:\n\techo done\n"
    let result = validateSource(src, flavor = lfMakefile)
    check result.errors.len >= 0

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

  test "null byte injection":
    let src = "all:\n\techo hello\x00\nclean:\n\trm -f\n"
    let result = validateSource(src, flavor = lfMakefile)
    check result.errors.len >= 0

  test "subst and patsubst":
    let src = "SRC = foo.c bar.c\nOBJ = $(SRC:.c=.o)\nOBJ2 = $(patsubst %.c,%.o,$(SRC))\n\nall:\n\techo $(OBJ) $(OBJ2)\n"
    let result = validateSource(src, flavor = lfMakefile)
    check result.errors.len >= 0

  test "vpath directive":
    let src = "vpath %.c src\nvpath %.h include\n\nall:\n\techo done\n"
    let result = validateSource(src, flavor = lfMakefile)
    check result.errors.len >= 0

  test "multiple targets with same recipe":
    let src = "foo bar baz:\n\techo $@\n"
    let result = validateSource(src, flavor = lfMakefile)
    check result.errors.len >= 0

  test "only comments":
    let src = "# Makefile comment\n  \n## another comment\n"
    let result = validateSource(src, flavor = lfMakefile)
    check result.errors.len >= 0

  test "order-only prerequisites":
    let src = "objdir := build/obj\n\n$(objdir)/%.o: %.c | $(objdir)\n\t$(CC) -c $< -o $@\n\n$(objdir):\n\tmkdir -p $@\n"
    let result = validateSource(src, flavor = lfMakefile)
    check result.errors.len >= 0