//go:build !llgo

package targets

import (
	"os"
	"path/filepath"
	"testing"
)

func TestConfigBasics(t *testing.T) {
	config := &Config{
		Name:       "test",
		LLVMTarget: "arm-none-eabi",
		GOOS:       "linux",
		GOARCH:     "arm",
	}

	if config.IsEmpty() {
		t.Error("Config should not be empty when fields are set")
	}

	empty := &Config{}
	if !empty.IsEmpty() {
		t.Error("Empty config should report as empty")
	}
}

func TestRawConfigInheritance(t *testing.T) {
	raw := &RawConfig{
		Inherits: []string{"parent1", "parent2"},
		Config: Config{
			Name: "child",
		},
	}

	if !raw.HasInheritance() {
		t.Error("RawConfig should report having inheritance")
	}

	inherits := raw.GetInherits()
	if len(inherits) != 2 || inherits[0] != "parent1" || inherits[1] != "parent2" {
		t.Errorf("Expected inheritance list [parent1, parent2], got %v", inherits)
	}

	noInherit := &RawConfig{}
	if noInherit.HasInheritance() {
		t.Error("RawConfig with no inherits should not report having inheritance")
	}
}

func TestLoaderLoadRaw(t *testing.T) {
	// Create a temporary directory for test configs
	tempDir := t.TempDir()

	// Create a test config file
	testConfig := `{
		"llvm-target": "thumbv6m-unknown-unknown-eabi",
		"cpu": "cortex-m0plus",
		"goos": "linux",
		"goarch": "arm",
		"build-tags": ["test", "embedded"],
		"cflags": ["-Os", "-g"],
		"ldflags": ["--gc-sections"],
		"binary-format": "uf2"
	}`

	configPath := filepath.Join(tempDir, "test-target.json")
	if err := os.WriteFile(configPath, []byte(testConfig), 0644); err != nil {
		t.Fatalf("Failed to write test config: %v", err)
	}

	loader := NewLoader(tempDir)
	config, err := loader.LoadRaw("test-target")
	if err != nil {
		t.Fatalf("Failed to load raw config: %v", err)
	}

	if config.Name != "test-target" {
		t.Errorf("Expected name 'test-target', got '%s'", config.Name)
	}
	if config.LLVMTarget != "thumbv6m-unknown-unknown-eabi" {
		t.Errorf("Expected llvm-target 'thumbv6m-unknown-unknown-eabi', got '%s'", config.LLVMTarget)
	}
	if config.CPU != "cortex-m0plus" {
		t.Errorf("Expected cpu 'cortex-m0plus', got '%s'", config.CPU)
	}
	if len(config.BuildTags) != 2 || config.BuildTags[0] != "test" || config.BuildTags[1] != "embedded" {
		t.Errorf("Expected build-tags [test, embedded], got %v", config.BuildTags)
	}
	if config.BinaryFormat != "uf2" {
		t.Errorf("Expected binary-format 'uf2', got '%s'", config.BinaryFormat)
	}
}

func TestLoaderInheritance(t *testing.T) {
	tempDir := t.TempDir()

	// Create parent config
	parentConfig := `{
		"llvm-target": "thumbv6m-unknown-unknown-eabi",
		"cpu": "cortex-m0plus",
		"goos": "linux",
		"goarch": "arm",
		"cflags": ["-Os"],
		"ldflags": ["--gc-sections"],
		"binary-format": "elf"
	}`

	// Create child config that inherits from parent
	childConfig := `{
		"inherits": ["parent"],
		"cpu": "cortex-m4",
		"build-tags": ["child"],
		"cflags": ["-O2"],
		"ldflags": ["-g"],
		"binary-format": "uf2"
	}`

	parentPath := filepath.Join(tempDir, "parent.json")
	childPath := filepath.Join(tempDir, "child.json")

	if err := os.WriteFile(parentPath, []byte(parentConfig), 0644); err != nil {
		t.Fatalf("Failed to write parent config: %v", err)
	}
	if err := os.WriteFile(childPath, []byte(childConfig), 0644); err != nil {
		t.Fatalf("Failed to write child config: %v", err)
	}

	loader := NewLoader(tempDir)
	config, err := loader.Load("child")
	if err != nil {
		t.Fatalf("Failed to load child config: %v", err)
	}

	// Check inherited values
	if config.LLVMTarget != "thumbv6m-unknown-unknown-eabi" {
		t.Errorf("Expected inherited llvm-target 'thumbv6m-unknown-unknown-eabi', got '%s'", config.LLVMTarget)
	}
	if config.GOOS != "linux" {
		t.Errorf("Expected inherited goos 'linux', got '%s'", config.GOOS)
	}
	if config.GOARCH != "arm" {
		t.Errorf("Expected inherited goarch 'arm', got '%s'", config.GOARCH)
	}

	// Check overridden values
	if config.CPU != "cortex-m4" {
		t.Errorf("Expected overridden cpu 'cortex-m4', got '%s'", config.CPU)
	}

	// Check binary-format override
	if config.BinaryFormat != "uf2" {
		t.Errorf("Expected overridden binary-format 'uf2', got '%s'", config.BinaryFormat)
	}

	// Check merged arrays
	expectedCFlags := []string{"-Os", "-O2"}
	if len(config.CFlags) != 2 || config.CFlags[0] != "-Os" || config.CFlags[1] != "-O2" {
		t.Errorf("Expected merged cflags %v, got %v", expectedCFlags, config.CFlags)
	}

	expectedLDFlags := []string{"--gc-sections", "-g"}
	if len(config.LDFlags) != 2 || config.LDFlags[0] != "--gc-sections" || config.LDFlags[1] != "-g" {
		t.Errorf("Expected merged ldflags %v, got %v", expectedLDFlags, config.LDFlags)
	}

	// Check child-specific values
	if len(config.BuildTags) != 1 || config.BuildTags[0] != "child" {
		t.Errorf("Expected build-tags [child], got %v", config.BuildTags)
	}
}

func TestLoaderListTargets(t *testing.T) {
	tempDir := t.TempDir()

	// Create some test config files
	configs := []string{"target1.json", "target2.json", "not-a-target.txt"}
	for _, config := range configs {
		configPath := filepath.Join(tempDir, config)
		if err := os.WriteFile(configPath, []byte("{}"), 0644); err != nil {
			t.Fatalf("Failed to write config %s: %v", config, err)
		}
	}

	loader := NewLoader(tempDir)
	targets, err := loader.ListTargets()
	if err != nil {
		t.Fatalf("Failed to list targets: %v", err)
	}

	expectedTargets := []string{"target1", "target2"}
	if len(targets) != len(expectedTargets) {
		t.Errorf("Expected %d targets, got %d", len(expectedTargets), len(targets))
	}

	for _, expected := range expectedTargets {
		found := false
		for _, target := range targets {
			if target == expected {
				found = true
				break
			}
		}
		if !found {
			t.Errorf("Expected target %s not found in list %v", expected, targets)
		}
	}
}

func TestResolver(t *testing.T) {
	tempDir := t.TempDir()

	// Create a test config
	testConfig := `{
		"llvm-target": "wasm32-unknown-wasi",
		"cpu": "generic",
		"goos": "wasip1",
		"goarch": "wasm"
	}`

	configPath := filepath.Join(tempDir, "wasi.json")
	if err := os.WriteFile(configPath, []byte(testConfig), 0644); err != nil {
		t.Fatalf("Failed to write test config: %v", err)
	}

	resolver := NewResolver(tempDir)

	// Test resolve
	config, err := resolver.Resolve("wasi")
	if err != nil {
		t.Fatalf("Failed to resolve target: %v", err)
	}

	if config.Name != "wasi" {
		t.Errorf("Expected name 'wasi', got '%s'", config.Name)
	}

	// Test has target
	if !resolver.HasTarget("wasi") {
		t.Error("Resolver should report having 'wasi' target")
	}
	if resolver.HasTarget("nonexistent") {
		t.Error("Resolver should not report having 'nonexistent' target")
	}

	// Test list available targets
	targets, err := resolver.ListAvailableTargets()
	if err != nil {
		t.Fatalf("Failed to list available targets: %v", err)
	}

	if len(targets) != 1 || targets[0] != "wasi" {
		t.Errorf("Expected targets [wasi], got %v", targets)
	}
}

func TestResolverWithRealTargets(t *testing.T) {
	// Test with actual targets directory if it exists
	resolver := NewDefaultResolver()
	targetsDir := resolver.GetTargetsDirectory()

	// Check if targets directory exists
	if _, err := os.Stat(targetsDir); os.IsNotExist(err) {
		t.Skipf("Targets directory %s does not exist, skipping real targets test", targetsDir)
	}

	// Test listing real targets
	targets, err := resolver.ListAvailableTargets()
	if err != nil {
		t.Fatalf("Failed to list real targets: %v", err)
	}

	t.Logf("Found %d targets in %s", len(targets), targetsDir)

	// Test resolving some known targets
	knownTargets := []string{"wasi", "cortex-m", "rp2040"}
	for _, targetName := range knownTargets {
		if resolver.HasTarget(targetName) {
			config, err := resolver.Resolve(targetName)
			if err != nil {
				t.Errorf("Failed to resolve known target %s: %v", targetName, err)
				continue
			}
			t.Logf("Resolved target %s: LLVM=%s, CPU=%s, GOOS=%s, GOARCH=%s",
				targetName, config.LLVMTarget, config.CPU, config.GOOS, config.GOARCH)
		}
	}
}

func TestResolveAllRealTargets(t *testing.T) {
	resolver := NewDefaultResolver()
	targetsDir := resolver.GetTargetsDirectory()

	// Check if targets directory exists
	if _, err := os.Stat(targetsDir); os.IsNotExist(err) {
		t.Skipf("Targets directory %s does not exist, skipping resolve all test", targetsDir)
	}

	// Test resolving all targets
	configs, err := resolver.ResolveAll()
	if err != nil {
		t.Fatalf("Failed to resolve all targets: %v", err)
	}

	t.Logf("Successfully resolved %d targets", len(configs))

	// Check that all configs have names
	for name, config := range configs {
		if config.Name != name {
			t.Errorf("Config name mismatch: key=%s, config.Name=%s", name, config.Name)
		}
		if config.IsEmpty() {
			t.Errorf("Config %s appears to be empty", name)
		}
	}

	// Log some statistics
	goosCounts := make(map[string]int)
	goarchCounts := make(map[string]int)

	for _, config := range configs {
		if config.GOOS != "" {
			goosCounts[config.GOOS]++
		}
		if config.GOARCH != "" {
			goarchCounts[config.GOARCH]++
		}
	}

	t.Logf("GOOS distribution: %v", goosCounts)
	t.Logf("GOARCH distribution: %v", goarchCounts)
}