package synthesizer

import (
	"strconv"
	"strings"
	"testing"
	"time"

	"github.com/router-for-me/CLIProxyAPI/v7/internal/config"
	coreauth "github.com/router-for-me/CLIProxyAPI/v7/sdk/cliproxy/auth"
)

func TestNewConfigSynthesizer(t *testing.T) {
	synth := NewConfigSynthesizer()
	if synth == nil {
		t.Fatal("expected non-nil synthesizer")
	}
}

func TestConfigSynthesizer_Synthesize_NilContext(t *testing.T) {
	synth := NewConfigSynthesizer()
	auths, err := synth.Synthesize(nil)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if len(auths) != 0 {
		t.Fatalf("expected empty auths, got %d", len(auths))
	}
}

func TestConfigSynthesizer_Synthesize_NilConfig(t *testing.T) {
	synth := NewConfigSynthesizer()
	ctx := &SynthesisContext{
		Config:      nil,
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	}
	auths, err := synth.Synthesize(ctx)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if len(auths) != 0 {
		t.Fatalf("expected empty auths, got %d", len(auths))
	}
}

func TestConfigSynthesizer_GeminiKeys(t *testing.T) {
	tests := []struct {
		name       string
		geminiKeys []config.GeminiKey
		wantLen    int
		validate   func(*testing.T, []*coreauth.Auth)
	}{
		{
			name: "single gemini key",
			geminiKeys: []config.GeminiKey{
				{APIKey: "test-key-123", Prefix: "team-a"},
			},
			wantLen: 1,
			validate: func(t *testing.T, auths []*coreauth.Auth) {
				if auths[0].Provider != "gemini" {
					t.Errorf("expected provider gemini, got %s", auths[0].Provider)
				}
				if auths[0].Prefix != "team-a" {
					t.Errorf("expected prefix team-a, got %s", auths[0].Prefix)
				}
				if auths[0].Label != "gemini-apikey" {
					t.Errorf("expected label gemini-apikey, got %s", auths[0].Label)
				}
				if auths[0].Attributes["api_key"] != "test-key-123" {
					t.Errorf("expected api_key test-key-123, got %s", auths[0].Attributes["api_key"])
				}
				if auths[0].Metadata != nil {
					t.Errorf("expected metadata to be nil when disable_cooling not set, got %v", auths[0].Metadata)
				}
				if auths[0].Status != coreauth.StatusActive {
					t.Errorf("expected status active, got %s", auths[0].Status)
				}
			},
		},
		{
			name: "gemini key disable cooling",
			geminiKeys: []config.GeminiKey{
				{APIKey: "test-key-123", Prefix: "team-a", DisableCooling: boolPointer(true)},
			},
			wantLen: 1,
			validate: func(t *testing.T, auths []*coreauth.Auth) {
				if v, ok := auths[0].Metadata["disable_cooling"].(bool); !ok || !v {
					t.Errorf("expected disable_cooling=true, got %v", auths[0].Metadata["disable_cooling"])
				}
			},
		},
		{
			name: "gemini key with base url and proxy",
			geminiKeys: []config.GeminiKey{
				{
					APIKey:   "api-key",
					BaseURL:  "https://custom.api.com",
					ProxyURL: "http://proxy.local:8080",
					Prefix:   "custom",
				},
			},
			wantLen: 1,
			validate: func(t *testing.T, auths []*coreauth.Auth) {
				if auths[0].Attributes["base_url"] != "https://custom.api.com" {
					t.Errorf("expected base_url https://custom.api.com, got %s", auths[0].Attributes["base_url"])
				}
				if auths[0].ProxyURL != "http://proxy.local:8080" {
					t.Errorf("expected proxy_url http://proxy.local:8080, got %s", auths[0].ProxyURL)
				}
			},
		},
		{
			name: "gemini key with headers",
			geminiKeys: []config.GeminiKey{
				{
					APIKey:  "api-key",
					Headers: map[string]string{"X-Custom": "value"},
				},
			},
			wantLen: 1,
			validate: func(t *testing.T, auths []*coreauth.Auth) {
				if auths[0].Attributes["header:X-Custom"] != "value" {
					t.Errorf("expected header:X-Custom=value, got %s", auths[0].Attributes["header:X-Custom"])
				}
			},
		},
		{
			name: "empty api key skipped",
			geminiKeys: []config.GeminiKey{
				{APIKey: ""},
				{APIKey: "  "},
				{APIKey: "valid-key"},
			},
			wantLen: 1,
		},
		{
			name: "multiple gemini keys",
			geminiKeys: []config.GeminiKey{
				{APIKey: "key-1", Prefix: "a"},
				{APIKey: "key-2", Prefix: "b"},
				{APIKey: "key-3", Prefix: "c"},
			},
			wantLen: 3,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			synth := NewConfigSynthesizer()
			ctx := &SynthesisContext{
				Config: &config.Config{
					GeminiKey: tt.geminiKeys,
				},
				Now:         time.Date(2025, 1, 1, 0, 0, 0, 0, time.UTC),
				IDGenerator: NewStableIDGenerator(),
			}

			auths, err := synth.Synthesize(ctx)
			if err != nil {
				t.Fatalf("unexpected error: %v", err)
			}
			if len(auths) != tt.wantLen {
				t.Fatalf("expected %d auths, got %d", tt.wantLen, len(auths))
			}

			if tt.validate != nil && len(auths) > 0 {
				tt.validate(t, auths)
			}
		})
	}
}

func TestConfigSynthesizer_InteractionsKeys(t *testing.T) {
	synth := NewConfigSynthesizer()
	ctx := &SynthesisContext{
		Config: &config.Config{
			InteractionsKey: []config.GeminiKey{{
				APIKey:   "interactions-key",
				BaseURL:  "https://interactions.example.com",
				ProxyURL: "http://proxy.local:8080",
				Prefix:   "native",
				Headers:  map[string]string{"X-Custom": "value"},
			}},
		},
		Now:         time.Date(2025, 1, 1, 0, 0, 0, 0, time.UTC),
		IDGenerator: NewStableIDGenerator(),
	}

	auths, errSynthesize := synth.Synthesize(ctx)
	if errSynthesize != nil {
		t.Fatalf("Synthesize() error = %v", errSynthesize)
	}
	if len(auths) != 1 {
		t.Fatalf("auth count = %d, want 1", len(auths))
	}
	auth := auths[0]
	if auth.Provider != "gemini-interactions" {
		t.Fatalf("provider = %q, want gemini-interactions", auth.Provider)
	}
	if auth.Label != "interactions-apikey" {
		t.Fatalf("label = %q, want interactions-apikey", auth.Label)
	}
	if auth.Prefix != "native" {
		t.Fatalf("prefix = %q, want native", auth.Prefix)
	}
	if auth.ProxyURL != "http://proxy.local:8080" {
		t.Fatalf("proxy URL = %q, want http://proxy.local:8080", auth.ProxyURL)
	}
	if got := auth.Attributes["api_key"]; got != "interactions-key" {
		t.Fatalf("api_key = %q, want interactions-key", got)
	}
	if got := auth.Attributes["base_url"]; got != "https://interactions.example.com" {
		t.Fatalf("base_url = %q, want https://interactions.example.com", got)
	}
	if got := auth.Attributes["header:X-Custom"]; got != "value" {
		t.Fatalf("header:X-Custom = %q, want value", got)
	}
}

func TestConfigSynthesizer_ClaudeKeys(t *testing.T) {
	synth := NewConfigSynthesizer()
	ctx := &SynthesisContext{
		Config: &config.Config{
			ClaudeKey: []config.ClaudeKey{
				{
					APIKey:                  "sk-ant-api-xxx",
					Prefix:                  "main",
					BaseURL:                 "https://api.anthropic.com",
					DisableCooling:          boolPointer(true),
					RebuildMidSystemMessage: true,
					FingerprintProfile:      "claude-code-cli",
					Models: []config.ClaudeModel{
						{Name: "claude-3-opus"},
						{Name: "claude-3-sonnet"},
					},
				},
			},
		},
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	}

	auths, err := synth.Synthesize(ctx)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if len(auths) != 1 {
		t.Fatalf("expected 1 auth, got %d", len(auths))
	}

	if auths[0].Provider != "claude" {
		t.Errorf("expected provider claude, got %s", auths[0].Provider)
	}
	if auths[0].Label != "claude-apikey" {
		t.Errorf("expected label claude-apikey, got %s", auths[0].Label)
	}
	if auths[0].Prefix != "main" {
		t.Errorf("expected prefix main, got %s", auths[0].Prefix)
	}
	if auths[0].Attributes["api_key"] != "sk-ant-api-xxx" {
		t.Errorf("expected api_key sk-ant-api-xxx, got %s", auths[0].Attributes["api_key"])
	}
	if auths[0].Attributes["config_index"] != "0" {
		t.Errorf("expected config_index 0, got %s", auths[0].Attributes["config_index"])
	}
	if _, ok := auths[0].Attributes["models_hash"]; !ok {
		t.Error("expected models_hash in attributes")
	}
	if got := auths[0].Attributes["rebuild_mid_system_message"]; got != "true" {
		t.Errorf("expected rebuild_mid_system_message=true, got %s", got)
	}
	if got := auths[0].Attributes["fingerprint_profile"]; got != "claude-code-cli" {
		t.Errorf("expected fingerprint_profile=claude-code-cli, got %s", got)
	}
	if v, ok := auths[0].Metadata["disable_cooling"].(bool); !ok || !v {
		t.Errorf("expected disable_cooling=true, got %v", auths[0].Metadata["disable_cooling"])
	}
}

func TestConfigSynthesizer_ClaudeKeys_SkipsEmptyAndHeaders(t *testing.T) {
	synth := NewConfigSynthesizer()
	ctx := &SynthesisContext{
		Config: &config.Config{
			ClaudeKey: []config.ClaudeKey{
				{APIKey: ""},    // empty, should be skipped
				{APIKey: "   "}, // whitespace, should be skipped
				{APIKey: "valid-key", Headers: map[string]string{"X-Custom": "value"}},
			},
		},
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	}

	auths, err := synth.Synthesize(ctx)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if len(auths) != 1 {
		t.Fatalf("expected 1 auth (empty keys skipped), got %d", len(auths))
	}
	if auths[0].Attributes["header:X-Custom"] != "value" {
		t.Errorf("expected header:X-Custom=value, got %s", auths[0].Attributes["header:X-Custom"])
	}
}

func TestConfigSynthesizer_CodexKeys(t *testing.T) {
	synth := NewConfigSynthesizer()
	ctx := &SynthesisContext{
		Config: &config.Config{
			CodexKey: []config.CodexKey{
				{
					APIKey:         "codex-key-123",
					Prefix:         "dev",
					BaseURL:        "https://api.openai.com",
					ProxyURL:       "http://proxy.local",
					Websockets:     true,
					AlphaSearch:    true,
					DisableCooling: boolPointer(true),
				},
			},
		},
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	}

	auths, err := synth.Synthesize(ctx)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if len(auths) != 1 {
		t.Fatalf("expected 1 auth, got %d", len(auths))
	}

	if auths[0].Provider != "codex" {
		t.Errorf("expected provider codex, got %s", auths[0].Provider)
	}
	if auths[0].Label != "codex-apikey" {
		t.Errorf("expected label codex-apikey, got %s", auths[0].Label)
	}
	if auths[0].ProxyURL != "http://proxy.local" {
		t.Errorf("expected proxy_url http://proxy.local, got %s", auths[0].ProxyURL)
	}
	if auths[0].Attributes["websockets"] != "true" {
		t.Errorf("expected websockets=true, got %s", auths[0].Attributes["websockets"])
	}
	if auths[0].Attributes[coreauth.AttributeCodexAlphaSearch] != "true" {
		t.Errorf("expected codex_alpha_search=true, got %s", auths[0].Attributes[coreauth.AttributeCodexAlphaSearch])
	}
	if v, ok := auths[0].Metadata["disable_cooling"].(bool); !ok || !v {
		t.Errorf("expected disable_cooling=true, got %v", auths[0].Metadata["disable_cooling"])
	}
}

func TestConfigSynthesizer_XAIKeys(t *testing.T) {
	synth := NewConfigSynthesizer()
	ctx := &SynthesisContext{
		Config: &config.Config{
			XAIKey: []config.XAIKey{{
				APIKey:         "xai-key-123",
				Prefix:         "grok",
				BaseURL:        "https://api.x.ai/v1",
				ProxyURL:       "http://proxy.local",
				Websockets:     true,
				AlphaSearch:    true,
				DisableCooling: boolPointer(true),
				Headers:        map[string]string{"X-Custom": "value"},
				Models:         []config.XAIModel{{Name: "grok-4.5", Alias: "grok-latest"}},
			}},
		},
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	}

	auths, errSynthesize := synth.Synthesize(ctx)
	if errSynthesize != nil {
		t.Fatalf("Synthesize() error = %v", errSynthesize)
	}
	if len(auths) != 1 {
		t.Fatalf("auth count = %d, want 1", len(auths))
	}
	auth := auths[0]
	if auth.Provider != "xai" {
		t.Fatalf("provider = %q, want xai", auth.Provider)
	}
	if auth.Label != "xai-apikey" {
		t.Fatalf("label = %q, want xai-apikey", auth.Label)
	}
	if auth.Attributes["websockets"] != "true" {
		t.Fatalf("websockets = %q, want true", auth.Attributes["websockets"])
	}
	if _, exists := auth.Attributes[coreauth.AttributeCodexAlphaSearch]; exists {
		t.Fatal("xAI auth unexpectedly contains codex_alpha_search")
	}
	if auth.Attributes["base_url"] != "https://api.x.ai/v1" {
		t.Fatalf("base_url = %q, want https://api.x.ai/v1", auth.Attributes["base_url"])
	}
	if auth.Attributes["header:X-Custom"] != "value" {
		t.Fatalf("custom header = %q, want value", auth.Attributes["header:X-Custom"])
	}
	if auth.Attributes["models_hash"] == "" {
		t.Fatal("models_hash is empty")
	}
	if auth.ProxyURL != "http://proxy.local" {
		t.Fatalf("proxy URL = %q, want http://proxy.local", auth.ProxyURL)
	}
	if disabled, ok := auth.Metadata["disable_cooling"].(bool); !ok || !disabled {
		t.Fatalf("disable_cooling = %#v, want true", auth.Metadata["disable_cooling"])
	}
}

func TestConfigSynthesizer_XAIKeys_AllowsEmptyAPIKeyWithBaseURL(t *testing.T) {
	synth := NewConfigSynthesizer()
	ctx := &SynthesisContext{
		Config: &config.Config{
			XAIKey: []config.CodexKey{
				{
					APIKey:  "",
					BaseURL: "https://custom-xai.example.com",
					Headers: map[string]string{"Custom-Auth": "secret"},
				},
				{
					APIKey:  "   ",
					BaseURL: "https://custom-xai-2.example.com",
				},
			},
		},
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	}

	auths, err := synth.Synthesize(ctx)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if len(auths) != 2 {
		t.Fatalf("expected 2 auths for empty API keys with base URL, got %d", len(auths))
	}
	if auths[0].Attributes["base_url"] != "https://custom-xai.example.com" {
		t.Fatalf("expected base_url=https://custom-xai.example.com, got %s", auths[0].Attributes["base_url"])
	}
	if auths[0].Attributes["header:Custom-Auth"] != "secret" {
		t.Fatalf("expected header:Custom-Auth=secret, got %s", auths[0].Attributes["header:Custom-Auth"])
	}
	if auths[0].Attributes["auth_kind"] != "apikey" {
		t.Fatalf("expected auth_kind=apikey, got %s", auths[0].Attributes["auth_kind"])
	}
	if _, exists := auths[0].Attributes["api_key"]; exists {
		t.Fatalf("expected no api_key attribute for empty key, got %s", auths[0].Attributes["api_key"])
	}
}

func TestConfigSynthesizer_ClaudeKeys_AllowsEmptyAPIKeyWithBaseURL(t *testing.T) {
	synth := NewConfigSynthesizer()
	ctx := &SynthesisContext{
		Config: &config.Config{
			ClaudeKey: []config.ClaudeKey{
				{
					APIKey:  "",
					BaseURL: "https://custom-claude.example.com",
					Headers: map[string]string{"Custom-Auth": "secret"},
				},
				{
					APIKey:  "   ",
					BaseURL: "https://custom-claude-2.example.com",
				},
			},
		},
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	}

	auths, err := synth.Synthesize(ctx)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if len(auths) != 2 {
		t.Fatalf("expected 2 auths for empty API keys with base URL, got %d", len(auths))
	}
	if auths[0].Attributes["base_url"] != "https://custom-claude.example.com" {
		t.Fatalf("expected base_url=https://custom-claude.example.com, got %s", auths[0].Attributes["base_url"])
	}
	if auths[0].Attributes["header:Custom-Auth"] != "secret" {
		t.Fatalf("expected header:Custom-Auth=secret, got %s", auths[0].Attributes["header:Custom-Auth"])
	}
	if auths[0].Attributes["auth_kind"] != "apikey" {
		t.Fatalf("expected auth_kind=apikey, got %s", auths[0].Attributes["auth_kind"])
	}
	if _, exists := auths[0].Attributes["api_key"]; exists {
		t.Fatalf("expected no api_key attribute for empty key, got %s", auths[0].Attributes["api_key"])
	}
}

func TestConfigSynthesizer_GeminiKeys_AllowsEmptyAPIKeyWithBaseURL(t *testing.T) {
	synth := NewConfigSynthesizer()
	ctx := &SynthesisContext{
		Config: &config.Config{
			GeminiKey: []config.GeminiKey{
				{
					APIKey:  "",
					BaseURL: "https://custom-gemini.example.com",
					Headers: map[string]string{"Custom-Auth": "secret"},
				},
			},
			InteractionsKey: []config.GeminiKey{
				{
					APIKey:  "",
					BaseURL: "https://custom-interactions.example.com",
				},
			},
		},
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	}

	auths, err := synth.Synthesize(ctx)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if len(auths) != 2 {
		t.Fatalf("expected 2 auths for empty API keys with base URL, got %d", len(auths))
	}
	if auths[0].Attributes["base_url"] != "https://custom-gemini.example.com" {
		t.Fatalf("expected base_url=https://custom-gemini.example.com, got %s", auths[0].Attributes["base_url"])
	}
	if auths[0].Attributes["header:Custom-Auth"] != "secret" {
		t.Fatalf("expected header:Custom-Auth=secret, got %s", auths[0].Attributes["header:Custom-Auth"])
	}
	if auths[0].Attributes["auth_kind"] != "apikey" {
		t.Fatalf("expected auth_kind=apikey, got %s", auths[0].Attributes["auth_kind"])
	}
	if _, exists := auths[0].Attributes["api_key"]; exists {
		t.Fatalf("expected no api_key attribute for empty key, got %s", auths[0].Attributes["api_key"])
	}
	if auths[1].Attributes["base_url"] != "https://custom-interactions.example.com" {
		t.Fatalf("expected base_url=https://custom-interactions.example.com, got %s", auths[1].Attributes["base_url"])
	}
}

func TestConfigSynthesizer_CodexKeys_SkipsEmptyAndHeaders(t *testing.T) {
	synth := NewConfigSynthesizer()
	ctx := &SynthesisContext{
		Config: &config.Config{
			CodexKey: []config.CodexKey{
				{APIKey: ""},   // empty key without base URL, should be skipped
				{APIKey: "  "}, // whitespace key without base URL, should be skipped
				{APIKey: "valid-key", Headers: map[string]string{"Authorization": "Bearer xyz"}},
			},
		},
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	}

	auths, err := synth.Synthesize(ctx)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if len(auths) != 1 {
		t.Fatalf("expected 1 auth (empty keys skipped), got %d", len(auths))
	}
	if auths[0].Attributes["header:Authorization"] != "Bearer xyz" {
		t.Errorf("expected header:Authorization=Bearer xyz, got %s", auths[0].Attributes["header:Authorization"])
	}
	if _, exists := auths[0].Attributes[coreauth.AttributeCodexAlphaSearch]; exists {
		t.Fatal("default alpha-search=false unexpectedly generated codex_alpha_search")
	}
}

func TestConfigSynthesizer_CodexKeys_AllowsEmptyAPIKeyWithBaseURL(t *testing.T) {
	synth := NewConfigSynthesizer()
	ctx := &SynthesisContext{
		Config: &config.Config{
			CodexKey: []config.CodexKey{
				{
					APIKey:  "",
					BaseURL: "https://custom-codex.example.com",
					Headers: map[string]string{"Custom-Auth": "secret"},
				},
				{
					APIKey:  "   ",
					BaseURL: "https://custom-codex-2.example.com",
				},
			},
		},
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	}

	auths, err := synth.Synthesize(ctx)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if len(auths) != 2 {
		t.Fatalf("expected 2 auths for empty API keys with base URL, got %d", len(auths))
	}
	if auths[0].Attributes["base_url"] != "https://custom-codex.example.com" {
		t.Fatalf("expected base_url=https://custom-codex.example.com, got %s", auths[0].Attributes["base_url"])
	}
	if auths[0].Attributes["header:Custom-Auth"] != "secret" {
		t.Fatalf("expected header:Custom-Auth=secret, got %s", auths[0].Attributes["header:Custom-Auth"])
	}
	if auths[0].Attributes["auth_kind"] != "apikey" {
		t.Fatalf("expected auth_kind=apikey, got %s", auths[0].Attributes["auth_kind"])
	}
	if _, exists := auths[0].Attributes["api_key"]; exists {
		t.Fatalf("expected no api_key attribute for empty key, got %s", auths[0].Attributes["api_key"])
	}
}

func TestConfigSynthesizer_OpenAICompat(t *testing.T) {
	tests := []struct {
		name    string
		compat  []config.OpenAICompatibility
		wantLen int
	}{
		{
			name: "with APIKeyEntries",
			compat: []config.OpenAICompatibility{
				{
					Name:           "CustomProvider",
					BaseURL:        "https://custom.api.com",
					DisableCooling: boolPointer(true),
					APIKeyEntries: []config.OpenAICompatibilityAPIKey{
						{APIKey: "key-1"},
						{APIKey: "key-2"},
					},
				},
			},
			wantLen: 2,
		},
		{
			name: "empty APIKeyEntries included (legacy)",
			compat: []config.OpenAICompatibility{
				{
					Name:    "EmptyKeys",
					BaseURL: "https://empty.api.com",
					APIKeyEntries: []config.OpenAICompatibilityAPIKey{
						{APIKey: ""},
						{APIKey: "   "},
					},
				},
			},
			wantLen: 2,
		},
		{
			name: "without APIKeyEntries (fallback)",
			compat: []config.OpenAICompatibility{
				{
					Name:    "NoKeyProvider",
					BaseURL: "https://no-key.api.com",
				},
			},
			wantLen: 1,
		},
		{
			name: "empty name defaults",
			compat: []config.OpenAICompatibility{
				{
					Name:    "",
					BaseURL: "https://default.api.com",
				},
			},
			wantLen: 1,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			synth := NewConfigSynthesizer()
			ctx := &SynthesisContext{
				Config: &config.Config{
					OpenAICompatibility: tt.compat,
				},
				Now:         time.Now(),
				IDGenerator: NewStableIDGenerator(),
			}

			auths, err := synth.Synthesize(ctx)
			if err != nil {
				t.Fatalf("unexpected error: %v", err)
			}
			if len(auths) != tt.wantLen {
				t.Fatalf("expected %d auths, got %d", tt.wantLen, len(auths))
			}
			if tt.name == "with APIKeyEntries" {
				for i := range auths {
					if v, ok := auths[i].Metadata["disable_cooling"].(bool); !ok || !v {
						t.Fatalf("expected auth[%d].disable_cooling=true, got %v", i, auths[i].Metadata["disable_cooling"])
					}
				}
			}
		})
	}
}

func TestConfigSynthesizer_OpenAICompat_UsesNamespacedProviderKey(t *testing.T) {
	synth := NewConfigSynthesizer()
	ctx := &SynthesisContext{
		Config: &config.Config{
			OpenAICompatibility: []config.OpenAICompatibility{
				{
					Name:    "kimi",
					BaseURL: "https://kimi-compatible.example.com/v1",
					APIKeyEntries: []config.OpenAICompatibilityAPIKey{
						{APIKey: "test-key"},
					},
				},
			},
		},
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	}

	auths, err := synth.Synthesize(ctx)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if len(auths) != 1 {
		t.Fatalf("expected 1 auth, got %d", len(auths))
	}
	auth := auths[0]
	if auth.Provider != "openai-compatible-kimi" {
		t.Fatalf("provider = %q, want openai-compatible-kimi", auth.Provider)
	}
	if auth.Attributes["provider_key"] != "openai-compatible-kimi" {
		t.Fatalf("provider_key = %q, want openai-compatible-kimi", auth.Attributes["provider_key"])
	}
	if auth.Attributes["compat_name"] != "kimi" {
		t.Fatalf("compat_name = %q, want kimi", auth.Attributes["compat_name"])
	}
	if auth.Attributes["config_index"] != "0" {
		t.Fatalf("config_index = %q, want 0", auth.Attributes["config_index"])
	}
}

func TestConfigSynthesizer_VertexCompat(t *testing.T) {
	synth := NewConfigSynthesizer()
	ctx := &SynthesisContext{
		Config: &config.Config{
			VertexCompatAPIKey: []config.VertexCompatKey{
				{
					APIKey:  "vertex-key-123",
					BaseURL: "https://vertex.googleapis.com",
					Prefix:  "vertex-prod",
				},
			},
		},
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	}

	auths, err := synth.Synthesize(ctx)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if len(auths) != 1 {
		t.Fatalf("expected 1 auth, got %d", len(auths))
	}

	if auths[0].Provider != "vertex" {
		t.Errorf("expected provider vertex, got %s", auths[0].Provider)
	}
	if auths[0].Label != "vertex-apikey" {
		t.Errorf("expected label vertex-apikey, got %s", auths[0].Label)
	}
	if auths[0].Prefix != "vertex-prod" {
		t.Errorf("expected prefix vertex-prod, got %s", auths[0].Prefix)
	}
}

func TestConfigSynthesizer_VertexCompat_SkipsEmptyAndHeaders(t *testing.T) {
	synth := NewConfigSynthesizer()
	ctx := &SynthesisContext{
		Config: &config.Config{
			VertexCompatAPIKey: []config.VertexCompatKey{
				{APIKey: "", BaseURL: "https://vertex.api"},   // empty key creates auth without api_key attr
				{APIKey: "  ", BaseURL: "https://vertex.api"}, // whitespace key creates auth without api_key attr
				{APIKey: "valid-key", BaseURL: "https://vertex.api", Headers: map[string]string{"X-Vertex": "test"}},
			},
		},
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	}

	auths, err := synth.Synthesize(ctx)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	// Vertex compat doesn't skip empty keys - it creates auths without api_key attribute
	if len(auths) != 3 {
		t.Fatalf("expected 3 auths, got %d", len(auths))
	}
	// First two should not have api_key attribute
	if _, ok := auths[0].Attributes["api_key"]; ok {
		t.Error("expected first auth to not have api_key attribute")
	}
	if _, ok := auths[1].Attributes["api_key"]; ok {
		t.Error("expected second auth to not have api_key attribute")
	}
	// Third should have headers
	if auths[2].Attributes["header:X-Vertex"] != "test" {
		t.Errorf("expected header:X-Vertex=test, got %s", auths[2].Attributes["header:X-Vertex"])
	}
}

func TestConfigSynthesizer_OpenAICompat_WithModelsHash(t *testing.T) {
	synth := NewConfigSynthesizer()
	ctx := &SynthesisContext{
		Config: &config.Config{
			OpenAICompatibility: []config.OpenAICompatibility{
				{
					Name:    "TestProvider",
					BaseURL: "https://test.api.com",
					Models: []config.OpenAICompatibilityModel{
						{Name: "model-a"},
						{Name: "model-b"},
					},
					APIKeyEntries: []config.OpenAICompatibilityAPIKey{
						{APIKey: "key-with-models"},
					},
				},
			},
		},
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	}

	auths, err := synth.Synthesize(ctx)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if len(auths) != 1 {
		t.Fatalf("expected 1 auth, got %d", len(auths))
	}
	if _, ok := auths[0].Attributes["models_hash"]; !ok {
		t.Error("expected models_hash in attributes")
	}
	if auths[0].Attributes["api_key"] != "key-with-models" {
		t.Errorf("expected api_key key-with-models, got %s", auths[0].Attributes["api_key"])
	}
}

func TestConfigSynthesizer_OpenAICompat_FallbackWithModels(t *testing.T) {
	synth := NewConfigSynthesizer()
	ctx := &SynthesisContext{
		Config: &config.Config{
			OpenAICompatibility: []config.OpenAICompatibility{
				{
					Name:    "NoKeyWithModels",
					BaseURL: "https://nokey.api.com",
					Models: []config.OpenAICompatibilityModel{
						{Name: "model-x"},
					},
					Headers: map[string]string{"X-API": "header-value"},
					// No APIKeyEntries - should use fallback path
				},
			},
		},
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	}

	auths, err := synth.Synthesize(ctx)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if len(auths) != 1 {
		t.Fatalf("expected 1 auth, got %d", len(auths))
	}
	if _, ok := auths[0].Attributes["models_hash"]; !ok {
		t.Error("expected models_hash in fallback path")
	}
	if auths[0].Attributes["header:X-API"] != "header-value" {
		t.Errorf("expected header:X-API=header-value, got %s", auths[0].Attributes["header:X-API"])
	}
}

func TestConfigSynthesizer_VertexCompat_WithModels(t *testing.T) {
	synth := NewConfigSynthesizer()
	ctx := &SynthesisContext{
		Config: &config.Config{
			VertexCompatAPIKey: []config.VertexCompatKey{
				{
					APIKey:  "vertex-key",
					BaseURL: "https://vertex.api",
					Models: []config.VertexCompatModel{
						{Name: "gemini-pro", Alias: "pro"},
						{Name: "gemini-ultra", Alias: "ultra"},
					},
				},
			},
		},
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	}

	auths, err := synth.Synthesize(ctx)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if len(auths) != 1 {
		t.Fatalf("expected 1 auth, got %d", len(auths))
	}
	if _, ok := auths[0].Attributes["models_hash"]; !ok {
		t.Error("expected models_hash in vertex auth with models")
	}
}

func TestConfigSynthesizer_IDStability(t *testing.T) {
	cfg := &config.Config{
		GeminiKey: []config.GeminiKey{
			{APIKey: "stable-key", Prefix: "test"},
		},
	}

	// Generate IDs twice with fresh generators
	synth1 := NewConfigSynthesizer()
	ctx1 := &SynthesisContext{
		Config:      cfg,
		Now:         time.Date(2025, 1, 1, 0, 0, 0, 0, time.UTC),
		IDGenerator: NewStableIDGenerator(),
	}
	auths1, _ := synth1.Synthesize(ctx1)

	synth2 := NewConfigSynthesizer()
	ctx2 := &SynthesisContext{
		Config:      cfg,
		Now:         time.Date(2025, 1, 1, 0, 0, 0, 0, time.UTC),
		IDGenerator: NewStableIDGenerator(),
	}
	auths2, _ := synth2.Synthesize(ctx2)

	if auths1[0].ID != auths2[0].ID {
		t.Errorf("same config should produce same ID: got %q and %q", auths1[0].ID, auths2[0].ID)
	}
}

func TestConfigSynthesizer_RejectsInvalidWeightsForAllAPIKeyTypes(t *testing.T) {
	invalidWeight := config.MaxCredentialWeight + 1
	tests := []struct {
		name     string
		cfg      *config.Config
		wantPath string
	}{
		{
			name:     "gemini",
			cfg:      &config.Config{GeminiKey: []config.GeminiKey{{APIKey: "key", Weight: &invalidWeight}}},
			wantPath: "gemini-api-key[0].weight",
		},
		{
			name:     "interactions",
			cfg:      &config.Config{InteractionsKey: []config.GeminiKey{{APIKey: "key", Weight: &invalidWeight}}},
			wantPath: "interactions-api-key[0].weight",
		},
		{
			name:     "claude",
			cfg:      &config.Config{ClaudeKey: []config.ClaudeKey{{APIKey: "key", Weight: &invalidWeight}}},
			wantPath: "claude-api-key[0].weight",
		},
		{
			name:     "codex",
			cfg:      &config.Config{CodexKey: []config.CodexKey{{APIKey: "key", Weight: &invalidWeight}}},
			wantPath: "codex-api-key[0].weight",
		},
		{
			name:     "xai",
			cfg:      &config.Config{XAIKey: []config.XAIKey{{APIKey: "key", Weight: &invalidWeight}}},
			wantPath: "xai-api-key[0].weight",
		},
		{
			name: "openai compatibility",
			cfg: &config.Config{OpenAICompatibility: []config.OpenAICompatibility{{
				APIKeyEntries: []config.OpenAICompatibilityAPIKey{{APIKey: "key", Weight: &invalidWeight}},
			}}},
			wantPath: "openai-compatibility[0].api-key-entries[0].weight",
		},
		{
			name:     "vertex",
			cfg:      &config.Config{VertexCompatAPIKey: []config.VertexCompatKey{{APIKey: "key", Weight: &invalidWeight}}},
			wantPath: "vertex-api-key[0].weight",
		},
	}

	for _, testCase := range tests {
		t.Run(testCase.name, func(t *testing.T) {
			auths, errSynthesize := NewConfigSynthesizer().Synthesize(&SynthesisContext{
				Config:      testCase.cfg,
				Now:         time.Now(),
				IDGenerator: NewStableIDGenerator(),
			})
			if errSynthesize == nil {
				t.Fatal("Synthesize() accepted an invalid credential weight")
			}
			if auths != nil {
				t.Fatalf("Synthesize() auths = %#v, want nil", auths)
			}
			if !strings.Contains(errSynthesize.Error(), "synthesize config API key auths: "+testCase.wantPath) {
				t.Fatalf("Synthesize() error = %q, want contextual path %q", errSynthesize, testCase.wantPath)
			}
		})
	}
}

func TestConfigSynthesizer_OmittedWeightRemainsUnset(t *testing.T) {
	auths, errSynthesize := NewConfigSynthesizer().Synthesize(&SynthesisContext{
		Config:      &config.Config{GeminiKey: []config.GeminiKey{{APIKey: "key"}}},
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	})
	if errSynthesize != nil {
		t.Fatalf("Synthesize() error = %v", errSynthesize)
	}
	if len(auths) != 1 {
		t.Fatalf("auth count = %d, want 1", len(auths))
	}
	if _, exists := auths[0].Attributes[coreauth.AttributeWeight]; exists {
		t.Fatal("omitted weight was added to synthesized attributes")
	}
}

func TestConfigSynthesizer_NormalizesNonPositiveWeightToZero(t *testing.T) {
	weight := -5
	auths, errSynthesize := NewConfigSynthesizer().Synthesize(&SynthesisContext{
		Config:      &config.Config{GeminiKey: []config.GeminiKey{{APIKey: "key", Weight: &weight}}},
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	})
	if errSynthesize != nil {
		t.Fatalf("Synthesize() error = %v", errSynthesize)
	}
	if len(auths) != 1 {
		t.Fatalf("auth count = %d, want 1", len(auths))
	}
	if gotWeight := auths[0].Attributes[coreauth.AttributeWeight]; gotWeight != "0" {
		t.Fatalf("weight = %q, want 0", gotWeight)
	}
}

func TestConfigSynthesizer_PropagatesWeightsForAllAPIKeyTypes(t *testing.T) {
	weight := func(value int) *int { return &value }
	synth := NewConfigSynthesizer()
	ctx := &SynthesisContext{
		Config: &config.Config{
			GeminiKey:       []config.GeminiKey{{APIKey: "gemini", Weight: weight(1)}},
			InteractionsKey: []config.GeminiKey{{APIKey: "interactions", Weight: weight(2)}},
			ClaudeKey:       []config.ClaudeKey{{APIKey: "claude", Weight: weight(3)}},
			CodexKey:        []config.CodexKey{{APIKey: "codex", Weight: weight(4)}},
			XAIKey:          []config.XAIKey{{APIKey: "xai", Weight: weight(5)}},
			OpenAICompatibility: []config.OpenAICompatibility{{
				Name:    "compat",
				BaseURL: "https://compat.example.com",
				APIKeyEntries: []config.OpenAICompatibilityAPIKey{{
					APIKey: "compat",
					Weight: weight(6),
				}},
			}},
			VertexCompatAPIKey: []config.VertexCompatKey{{APIKey: "vertex", Weight: weight(7)}},
		},
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	}

	auths, errSynthesize := synth.Synthesize(ctx)
	if errSynthesize != nil {
		t.Fatalf("Synthesize() error = %v", errSynthesize)
	}
	if len(auths) != 7 {
		t.Fatalf("auth count = %d, want 7", len(auths))
	}
	for index, auth := range auths {
		wantWeight := strconv.Itoa(index + 1)
		if gotWeight := auth.Attributes[coreauth.AttributeWeight]; gotWeight != wantWeight {
			t.Fatalf("auth[%d] weight = %q, want %q", index, gotWeight, wantWeight)
		}
	}
}

func TestConfigSynthesizer_AllProviders(t *testing.T) {
	synth := NewConfigSynthesizer()
	ctx := &SynthesisContext{
		Config: &config.Config{
			GeminiKey: []config.GeminiKey{
				{APIKey: "gemini-key"},
			},
			ClaudeKey: []config.ClaudeKey{
				{APIKey: "claude-key"},
			},
			CodexKey: []config.CodexKey{
				{APIKey: "codex-key"},
			},
			XAIKey: []config.XAIKey{
				{APIKey: "xai-key"},
			},
			OpenAICompatibility: []config.OpenAICompatibility{
				{Name: "compat", BaseURL: "https://compat.api"},
			},
			VertexCompatAPIKey: []config.VertexCompatKey{
				{APIKey: "vertex-key", BaseURL: "https://vertex.api"},
			},
		},
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	}

	auths, err := synth.Synthesize(ctx)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if len(auths) != 6 {
		t.Fatalf("expected 6 auths, got %d", len(auths))
	}

	providers := make(map[string]bool)
	for _, a := range auths {
		providers[a.Provider] = true
	}

	expected := []string{"gemini", "claude", "codex", "xai", "openai-compatible-compat", "vertex"}
	for _, p := range expected {
		if !providers[p] {
			t.Errorf("expected provider %s not found", p)
		}
	}
}

func TestConfigSynthesizer_RequestRetry(t *testing.T) {
	zero := 0
	positive := 2
	negative := -1
	synth := NewConfigSynthesizer()
	ctx := &SynthesisContext{
		Config: &config.Config{
			GeminiKey: []config.GeminiKey{
				{APIKey: "gemini-zero", RequestRetry: &zero},
				{APIKey: "gemini-positive", RequestRetry: &positive},
				{APIKey: "gemini-negative", RequestRetry: &negative},
				{APIKey: "gemini-unset"},
			},
			InteractionsKey: []config.GeminiKey{
				{APIKey: "interactions-zero", RequestRetry: &zero},
			},
			ClaudeKey: []config.ClaudeKey{
				{APIKey: "claude-positive", RequestRetry: &positive},
			},
			CodexKey: []config.CodexKey{
				{APIKey: "codex-zero", RequestRetry: &zero},
			},
			XAIKey: []config.XAIKey{
				{APIKey: "xai-positive", RequestRetry: &positive},
			},
			OpenAICompatibility: []config.OpenAICompatibility{
				{
					Name:         "compat",
					BaseURL:      "https://compat.api",
					RequestRetry: &zero,
					APIKeyEntries: []config.OpenAICompatibilityAPIKey{
						{APIKey: "compat-key"},
					},
				},
			},
			VertexCompatAPIKey: []config.VertexCompatKey{
				{APIKey: "vertex-positive", BaseURL: "https://vertex.api", RequestRetry: &positive},
			},
		},
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	}

	auths, errSynthesize := synth.Synthesize(ctx)
	if errSynthesize != nil {
		t.Fatalf("Synthesize() error = %v", errSynthesize)
	}

	want := map[string]any{
		"gemini-zero":       0,
		"gemini-positive":   2,
		"gemini-negative":   nil,
		"gemini-unset":      nil,
		"interactions-zero": 0,
		"claude-positive":   2,
		"codex-zero":        0,
		"xai-positive":      2,
		"compat-key":        0,
		"vertex-positive":   2,
	}
	got := make(map[string]any, len(auths))
	for _, auth := range auths {
		key := auth.Attributes["api_key"]
		if auth.Metadata == nil {
			got[key] = nil
			continue
		}
		if value, exists := auth.Metadata["request_retry"]; exists {
			got[key] = value
			continue
		}
		got[key] = nil
	}
	for key, expected := range want {
		actual, exists := got[key]
		if !exists {
			t.Fatalf("missing synthesized auth for %s", key)
		}
		if actual != expected {
			t.Fatalf("%s request_retry = %v, want %v", key, actual, expected)
		}
	}
}

func TestConfigSynthesizer_RequestScopedErrors(t *testing.T) {
	synth := NewConfigSynthesizer()
	rules := []config.RequestScopedErrorRule{
		{
			Status: 400,
			Match:  []string{"maximum_context_length"},
			Action: "stop",
		},
	}

	ctx := &SynthesisContext{
		Config: &config.Config{
			GeminiKey: []config.GeminiKey{
				{APIKey: "gemini-key", RequestScopedErrors: rules},
			},
			InteractionsKey: []config.GeminiKey{
				{APIKey: "interactions-key", RequestScopedErrors: rules},
			},
			ClaudeKey: []config.ClaudeKey{
				{APIKey: "claude-key", RequestScopedErrors: rules},
			},
			CodexKey: []config.CodexKey{
				{APIKey: "codex-key", BaseURL: "https://codex.api", RequestScopedErrors: rules},
			},
			XAIKey: []config.CodexKey{
				{APIKey: "xai-key", BaseURL: "https://xai.api", RequestScopedErrors: rules},
			},
			OpenAICompatibility: []config.OpenAICompatibility{
				{
					Name:                "compat",
					BaseURL:             "https://compat.api",
					RequestScopedErrors: rules,
					APIKeyEntries: []config.OpenAICompatibilityAPIKey{
						{APIKey: "compat-key"},
					},
				},
			},
		},
		Now:         time.Now(),
		IDGenerator: NewStableIDGenerator(),
	}

	auths, errSynthesize := synth.Synthesize(ctx)
	if errSynthesize != nil {
		t.Fatalf("Synthesize() error = %v", errSynthesize)
	}

	for _, auth := range auths {
		if auth.Metadata == nil {
			t.Fatalf("auth %s has nil metadata", auth.ID)
		}
		val, exists := auth.Metadata["request_scoped_errors"]
		if !exists {
			t.Fatalf("auth %s missing request_scoped_errors in metadata", auth.ID)
		}
		extracted, ok := val.([]config.RequestScopedErrorRule)
		if !ok || len(extracted) != 1 || extracted[0].Action != "stop" {
			t.Fatalf("auth %s unexpected request_scoped_errors: %#v", auth.ID, val)
		}
	}
}