package dsl

import (
	"strings"
	"testing"
)

const buildDefaultsPrefix = `
build_defaults {
    language = "c"
    standard = "c11"
    sources  = "*.c"
    output   = "sol"
    warnings = strict
}
`

func TestBuildAllFieldsParsed(t *testing.T) {
	src := `
build_defaults {
    language = "cpp"
    standard = "c++17"
    sources  = "a.cpp" "b.cpp"
    includes = "inc" "inc2"
    output   = "sol"
    warnings = pedantic
    wrapper  = "timeout"
    sanitize = "address" "undefined"
    link     = "-lm"
    extra    = "-g"
    platforms = "linux" "darwin"
    compilers = "gcc" "clang"
    define("DEBUG") = "1"
    define("VERSION") = "2"
}

build "release" {
    profile = release
}

group("g") { weight = 1.0 test("t") { stdout = "" } }
`
	f, _, err := Parse(src)
	if err != nil {
		t.Fatalf("parse: %v", err)
	}
	bd := f.BuildDefaults
	if bd == nil {
		t.Fatal("no build_defaults")
	}
	if bd.Language != "cpp" || bd.Standard != "c++17" || bd.Output != "sol" {
		t.Errorf("basic fields wrong: %+v", bd)
	}
	if bd.Warnings != WarningsPedantic {
		t.Errorf("Warnings = %v", bd.Warnings)
	}
	if bd.Wrapper != "timeout" {
		t.Errorf("Wrapper = %q", bd.Wrapper)
	}
	if len(bd.Sources) != 2 || len(bd.Includes) != 2 || len(bd.Sanitize) != 2 {
		t.Errorf("lists: sources=%v includes=%v sanitize=%v", bd.Sources, bd.Includes, bd.Sanitize)
	}
	if len(bd.Link) != 1 || len(bd.Extra) != 1 {
		t.Errorf("link/extra: %v / %v", bd.Link, bd.Extra)
	}
	if len(bd.Platforms) != 2 || len(bd.Compilers) != 2 {
		t.Errorf("platforms/compilers: %v / %v", bd.Platforms, bd.Compilers)
	}
	if bd.Defines["DEBUG"] != "1" || bd.Defines["VERSION"] != "2" {
		t.Errorf("Defines = %v", bd.Defines)
	}
}

func TestBuildOSOverrides(t *testing.T) {
	src := `
build_defaults {
    language = "c"
    standard = "c11"
    sources  = "main.c"
    output   = "sol"
    warnings = strict
}

build "release" {
    profile = release
    linux   { extra = "-pthread" }
    windows { extra = "/MT" }
    darwin  { extra = "-framework CoreFoundation" }
}

group("g") { weight = 1.0 test("t") { stdout = "" } }
`
	f, _, err := Parse(src)
	if err != nil {
		t.Fatalf("parse: %v", err)
	}
	b := f.Builds[0]
	if b.Linux == nil || b.Windows == nil || b.Darwin == nil {
		t.Errorf("OS overrides missing: %+v", b)
	}
}

func TestBuildOSNestedForbidden(t *testing.T) {
	src := buildDefaultsPrefix + `
build "r" {
    profile = release
    linux {
        darwin { extra = "-x" }
    }
}
group("g") { weight = 1.0 test("t") { stdout = "" } }
`
	_, _, err := Parse(src)
	if err == nil || !strings.Contains(err.Error(), "nested inside another OS override") {
		t.Errorf("want nested OS override error, got %v", err)
	}
}

func TestBuildDuplicateOSOverride(t *testing.T) {
	src := buildDefaultsPrefix + `
build "r" {
    profile = release
    linux { extra = "-a" }
    linux { extra = "-b" }
}
group("g") { weight = 1.0 test("t") { stdout = "" } }
`
	_, _, err := Parse(src)
	if err == nil || !strings.Contains(err.Error(), "duplicate linux override") {
		t.Errorf("want duplicate linux override, got %v", err)
	}
}

func TestBuildUnknownField(t *testing.T) {
	src := `
build_defaults {
    bogus = "x"
    language = "c"
    standard = "c11"
    sources  = "main.c"
    output   = "sol"
    warnings = strict
}
group("g") { weight = 1.0 test("t") { stdout = "" } }
`
	_, _, err := Parse(src)
	if err == nil || !strings.Contains(err.Error(), "unknown field") {
		t.Errorf("want unknown field error, got %v", err)
	}
}

func TestBuildUnknownProfile(t *testing.T) {
	src := `
build_defaults {
    language = "c"
    standard = "c11"
    sources  = "main.c"
    output   = "sol"
    warnings = strict
}
build "weird" { profile = bogus }
group("g") { weight = 1.0 test("t") { stdout = "" } }
`
	_, _, err := Parse(src)
	if err == nil || !strings.Contains(err.Error(), "unknown profile") {
		t.Errorf("want unknown profile error, got %v", err)
	}
}

func TestBuildUnknownWarnings(t *testing.T) {
	src := `
build_defaults {
    language = "c"
    standard = "c11"
    sources  = "main.c"
    output   = "sol"
    warnings = bogus
}
group("g") { weight = 1.0 test("t") { stdout = "" } }
`
	_, _, err := Parse(src)
	if err == nil || !strings.Contains(err.Error(), "unknown warnings level") {
		t.Errorf("want unknown warnings error, got %v", err)
	}
}

func TestBuildWarningsDefaultAndStrict(t *testing.T) {
	src := `
build_defaults {
    language = "c"
    standard = "c11"
    sources  = "main.c"
    output   = "sol"
    warnings = default
}
build "r" {
    warnings = strict
}
group("g") { weight = 1.0 test("t") { stdout = "" } }
`
	f, _, err := Parse(src)
	if err != nil {
		t.Fatalf("parse: %v", err)
	}
	if f.BuildDefaults.Warnings != WarningsDefault {
		t.Errorf("defaults warnings = %v", f.BuildDefaults.Warnings)
	}
	if f.Builds[0].Warnings != WarningsStrict {
		t.Errorf("build warnings = %v", f.Builds[0].Warnings)
	}
}

func TestBuildInvalidPlatform(t *testing.T) {
	src := buildDefaultsPrefix + `
build "r" {
    profile = release
    platforms = "bsd"
}
group("g") { weight = 1.0 test("t") { stdout = "" } }
`
	_, _, err := Parse(src)
	if err == nil || !strings.Contains(err.Error(), "unknown platform") {
		t.Errorf("want unknown platform error, got %v", err)
	}
}

func TestBuildAssignStringMissingAssign(t *testing.T) {
	src := `
build_defaults {
    language "c"
    standard = "c11"
    sources  = "main.c"
    output   = "sol"
    warnings = strict
}
group("g") { weight = 1.0 test("t") { stdout = "" } }
`
	_, _, err := Parse(src)
	if err == nil || !strings.Contains(err.Error(), "expected") {
		t.Errorf("want expected = error, got %v", err)
	}
}

func TestBuildAssignStringListMissingAssign(t *testing.T) {
	src := `
build_defaults {
    language = "c"
    standard = "c11"
    sources  "main.c"
    output   = "sol"
    warnings = strict
}
group("g") { weight = 1.0 test("t") { stdout = "" } }
`
	_, _, err := Parse(src)
	if err == nil || !strings.Contains(err.Error(), "expected") {
		t.Errorf("want expected = error, got %v", err)
	}
}

func TestBuildDefineErrors(t *testing.T) {
	cases := []string{
		`build_defaults { language="c" standard="c11" sources="x.c" output="s" warnings=strict define "K" = "v" }`,
		`build_defaults { language="c" standard="c11" sources="x.c" output="s" warnings=strict define(K) = "v" }`,
		`build_defaults { language="c" standard="c11" sources="x.c" output="s" warnings=strict define("K" = "v" }`,
		`build_defaults { language="c" standard="c11" sources="x.c" output="s" warnings=strict define("K") "v" }`,
		`build_defaults { language="c" standard="c11" sources="x.c" output="s" warnings=strict define("K") = K }`,
	}
	for i, src := range cases {
		full := src + "\ngroup(\"g\") { weight = 1.0 test(\"t\") { stdout = \"\" } }"
		if _, _, err := Parse(full); err == nil {
			t.Errorf("case %d: expected error", i)
		}
	}
}

func TestBuildNonIdentInBlock(t *testing.T) {
	src := `
build_defaults { "not-an-ident" = "x" }
group("g") { weight = 1.0 test("t") { stdout = "" } }
`
	_, _, err := Parse(src)
	if err == nil || !strings.Contains(err.Error(), "unexpected token") {
		t.Errorf("want unexpected token error, got %v", err)
	}
}

func TestToolchainsDuplicateInSameBlock(t *testing.T) {
	src := `
toolchains {
    gcc { platforms = "linux" }
    gcc { platforms = "darwin" }
}
build_defaults { language="c" standard="c11" sources="x.c" output="s" warnings=strict }
group("g") { weight = 1.0 test("t") { stdout = "" } }
`
	_, _, err := Parse(src)
	if err == nil || !strings.Contains(err.Error(), "duplicate toolchain") {
		t.Errorf("want duplicate toolchain error, got %v", err)
	}
}

func TestToolchainsMissingPlatforms(t *testing.T) {
	src := `
toolchains {
    gcc { binary = "gcc-13" }
}
build_defaults { language="c" standard="c11" sources="x.c" output="s" warnings=strict }
group("g") { weight = 1.0 test("t") { stdout = "" } }
`
	_, _, err := Parse(src)
	if err == nil || !strings.Contains(err.Error(), "platforms is required") {
		t.Errorf("want platforms-required error, got %v", err)
	}
}

func TestToolchainsBadName(t *testing.T) {
	src := `
toolchains {
    42 { platforms = "linux" }
}
`
	_, _, err := Parse(src)
	if err == nil || !strings.Contains(err.Error(), "expected toolchain name") {
		t.Errorf("want toolchain name error, got %v", err)
	}
}

func TestToolchainsUnknownField(t *testing.T) {
	src := `
toolchains {
    gcc { platforms = "linux" bogus = "x" }
}
build_defaults { language="c" standard="c11" sources="x.c" output="s" warnings=strict }
group("g") { weight = 1.0 test("t") { stdout = "" } }
`
	_, _, err := Parse(src)
	if err == nil || !strings.Contains(err.Error(), "unknown field") {
		t.Errorf("want unknown field error, got %v", err)
	}
}

func TestToolchainsUnknownClass(t *testing.T) {
	src := `
toolchains {
    gcc { platforms = "linux" class = bogus }
}
build_defaults { language="c" standard="c11" sources="x.c" output="s" warnings=strict }
group("g") { weight = 1.0 test("t") { stdout = "" } }
`
	_, _, err := Parse(src)
	if err == nil || !strings.Contains(err.Error(), "unknown compiler class") {
		t.Errorf("want unknown class error, got %v", err)
	}
}

func TestToolchainsClassAndBinary(t *testing.T) {
	src := `
toolchains {
    gcc13 { platforms = "linux" binary = "gcc-13" class = gnu }
    msvc { platforms = "windows" class = msvc }
}
build_defaults { language="c" standard="c11" sources="x.c" output="s" warnings=strict }
group("g") { weight = 1.0 test("t") { stdout = "" } }
`
	f, _, err := Parse(src)
	if err != nil {
		t.Fatalf("parse: %v", err)
	}
	if len(f.Toolchains) != 2 {
		t.Fatalf("toolchains = %d", len(f.Toolchains))
	}
	if f.Toolchains[0].Binary != "gcc-13" || f.Toolchains[0].Class != "gnu" {
		t.Errorf("gcc13 = %+v", f.Toolchains[0])
	}
	if f.Toolchains[1].Class != "msvc" {
		t.Errorf("msvc class = %q", f.Toolchains[1].Class)
	}
}