package plugin

import (
	"context"
	"encoding/json"
	"net/http"
	"testing"
	"time"

	managedaccess "cpa-ext/internal/access"
)

func TestManagedKeyAuthenticationAndLifecycle(t *testing.T) {
	app := NewApp()
	if _, err := app.HandleMethod(MethodPluginRegister, lifecycleRequest(t, SchemaVersion, testConfig(t, "enabled: true\ncodex_only: false\n"))); err != nil {
		t.Fatal(err)
	}
	auth := func(secret string) FrontendAuthResponse {
		raw, _ := json.Marshal(FrontendAuthRequest{Headers: http.Header{"Authorization": []string{"Bearer " + secret}}})
		response, err := app.HandleMethod(MethodFrontendAuthenticate, raw)
		if err != nil {
			t.Fatal(err)
		}
		var envelope Envelope
		_ = json.Unmarshal(response, &envelope)
		var result FrontendAuthResponse
		_ = json.Unmarshal(envelope.Result, &result)
		return result
	}
	if got := auth("000000"); !got.Authenticated || got.Principal != "key_default" {
		t.Fatalf("default auth = %+v", got)
	}
	xAPIKeyRaw, _ := json.Marshal(FrontendAuthRequest{Headers: http.Header{"X-Api-Key": []string{"000000"}}})
	xAPIKeyResponse, _ := app.HandleMethod(MethodFrontendAuthenticate, xAPIKeyRaw)
	var xAPIKeyEnvelope Envelope
	_ = json.Unmarshal(xAPIKeyResponse, &xAPIKeyEnvelope)
	var xAPIKeyResult FrontendAuthResponse
	_ = json.Unmarshal(xAPIKeyEnvelope.Result, &xAPIKeyResult)
	if !xAPIKeyResult.Authenticated {
		t.Fatal("x-api-key did not authenticate")
	}
	store, _ := app.currentStore()
	key, _ := store.ManagedKeyByID(context.Background(), "key_default")
	key.Status = managedaccess.StatusDisabled
	if err := store.UpdateManagedKey(context.Background(), key); err != nil {
		t.Fatal(err)
	}
	if got := auth("000000"); got.Authenticated {
		t.Fatalf("disabled key authenticated: %+v", got)
	}
	key.Status = managedaccess.StatusActive
	if err := store.UpdateManagedKey(context.Background(), key); err != nil {
		t.Fatal(err)
	}
	if got := auth("000000"); !got.Authenticated {
		t.Fatalf("restored key did not authenticate: %+v", got)
	}
}

func TestModelAllowlistAndStrictUpstreamRouting(t *testing.T) {
	app := NewApp()
	if _, err := app.HandleMethod(MethodPluginRegister, lifecycleRequest(t, SchemaVersion, testConfig(t, "enabled: true\ncodex_only: false\n"))); err != nil {
		t.Fatal(err)
	}
	store, _ := app.currentStore()
	if err := store.SyncUpstreamAccounts(context.Background(), []managedaccess.UpstreamAccount{{
		CPAAuthID: "oauth-1", CPAAuthIndex: "index-1", Provider: "codex", DisplayName: "OAuth One", LastSeenAt: time.Now(),
	}}); err != nil {
		t.Fatal(err)
	}
	accounts, _ := store.ListUpstreamAccounts(context.Background())
	key, _ := store.ManagedKeyByID(context.Background(), "key_default")
	key.RouteMode = managedaccess.RouteStrict
	key.UpstreamAccountID = accounts[0].ID
	key.AllModels = false
	key.Models = []string{"gpt-5.6-sol"}
	if err := store.UpdateManagedKey(context.Background(), key); err != nil {
		t.Fatal(err)
	}

	interceptRaw, _ := json.Marshal(RequestInterceptRequest{
		RequestID: "req-1", RequestedModel: "other-model",
		Metadata: map[string]any{callerScopeMetadata: managedaccess.CallerScope(key.ID)},
	})
	response, err := app.HandleMethod(MethodRequestBefore, interceptRaw)
	if err != nil {
		t.Fatal(err)
	}
	var envelope Envelope
	_ = json.Unmarshal(response, &envelope)
	var intercept RequestInterceptResponse
	_ = json.Unmarshal(envelope.Result, &intercept)
	if !intercept.Terminate || intercept.StatusCode != http.StatusForbidden {
		t.Fatalf("model denial = %+v", intercept)
	}

	pickRaw, _ := json.Marshal(SchedulerPickRequest{
		Model: "gpt-5.6-sol", Options: SchedulerOptions{Metadata: map[string]any{callerScopeMetadata: managedaccess.CallerScope(key.ID)}},
		Candidates: []SchedulerAuthCandidate{{ID: "oauth-1", Provider: "codex"}},
	})
	response, err = app.HandleMethod(MethodSchedulerPick, pickRaw)
	if err != nil {
		t.Fatal(err)
	}
	_ = json.Unmarshal(response, &envelope)
	var pick SchedulerPickResponse
	_ = json.Unmarshal(envelope.Result, &pick)
	if !pick.Handled || pick.AuthID != "oauth-1" {
		t.Fatalf("scheduler pick = %+v", pick)
	}
	afterRaw, _ := json.Marshal(RequestInterceptRequest{
		RequestID: "req-1", RequestedModel: "gpt-5.6-sol",
		Metadata: map[string]any{callerScopeMetadata: managedaccess.CallerScope(key.ID), selectedAuthMetadata: "oauth-1"},
	})
	afterResponse, _ := app.HandleMethod(MethodRequestAfter, afterRaw)
	_ = json.Unmarshal(afterResponse, &envelope)
	_ = json.Unmarshal(envelope.Result, &intercept)
	if intercept.Terminate {
		t.Fatalf("selected strict target was rejected: %+v", intercept)
	}

	pickRaw, _ = json.Marshal(SchedulerPickRequest{
		Model: "gpt-5.6-sol", Options: SchedulerOptions{Metadata: map[string]any{callerScopeMetadata: managedaccess.CallerScope(key.ID)}},
		Candidates: []SchedulerAuthCandidate{{ID: "oauth-2", Provider: "codex"}},
	})
	response, err = app.HandleMethod(MethodSchedulerPick, pickRaw)
	if err != nil {
		t.Fatal(err)
	}
	_ = json.Unmarshal(response, &envelope)
	if envelope.OK || envelope.Error == nil || envelope.Error.Code != "bound_upstream_unavailable" {
		t.Fatalf("missing strict target did not fail closed: %s", response)
	}
}

func TestCreateKeyCopiesDefaultRuleSnapshot(t *testing.T) {
	app := NewApp()
	if _, err := app.HandleMethod(MethodPluginRegister, lifecycleRequest(t, SchemaVersion, testConfig(t, "enabled: true\n"))); err != nil {
		t.Fatal(err)
	}
	response := managementCallBody(t, app, http.MethodPost, managementBase+routeKeys, []byte(`{"name":"alice","secret":"alice-000000"}`))
	if response.StatusCode != http.StatusCreated {
		t.Fatalf("create status=%d body=%s", response.StatusCode, response.Body)
	}
	var created managedaccess.ManagedKey
	if err := json.Unmarshal(response.Body, &created); err != nil {
		t.Fatal(err)
	}
	if created.Secret != "alice-000000" || created.RouteMode != managedaccess.RouteAuto || !created.AllModels {
		t.Fatalf("created = %+v", created)
	}
}