package server

import (
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

	"git.wntrmute.dev/kyle/mcias/internal/vault"
)

func TestHandleHealthSealed(t *testing.T) {
	srv, _, _, _ := newTestServer(t)
	srv.vault.Seal()

	req := httptest.NewRequest(http.MethodGet, "/v1/health", nil)
	rr := httptest.NewRecorder()
	srv.Handler().ServeHTTP(rr, req)

	if rr.Code != http.StatusOK {
		t.Fatalf("health status = %d, want 200", rr.Code)
	}

	var resp map[string]string
	if err := json.NewDecoder(rr.Body).Decode(&resp); err != nil {
		t.Fatalf("decode health: %v", err)
	}
	if resp["status"] != "sealed" {
		t.Fatalf("health status = %q, want sealed", resp["status"])
	}
}

func TestHandleHealthUnsealed(t *testing.T) {
	srv, _, _, _ := newTestServer(t)

	req := httptest.NewRequest(http.MethodGet, "/v1/health", nil)
	rr := httptest.NewRecorder()
	srv.Handler().ServeHTTP(rr, req)

	if rr.Code != http.StatusOK {
		t.Fatalf("health status = %d, want 200", rr.Code)
	}

	var resp map[string]string
	if err := json.NewDecoder(rr.Body).Decode(&resp); err != nil {
		t.Fatalf("decode health: %v", err)
	}
	if resp["status"] != "ok" {
		t.Fatalf("health status = %q, want ok", resp["status"])
	}
}

func TestVaultStatusEndpoint(t *testing.T) {
	srv, _, _, _ := newTestServer(t)

	// Unsealed
	req := httptest.NewRequest(http.MethodGet, "/v1/vault/status", nil)
	rr := httptest.NewRecorder()
	srv.Handler().ServeHTTP(rr, req)
	if rr.Code != http.StatusOK {
		t.Fatalf("status code = %d, want 200", rr.Code)
	}
	var resp map[string]bool
	if err := json.NewDecoder(rr.Body).Decode(&resp); err != nil {
		t.Fatalf("decode: %v", err)
	}
	if resp["sealed"] {
		t.Fatal("vault should be unsealed")
	}

	// Seal and check again
	srv.vault.Seal()
	req = httptest.NewRequest(http.MethodGet, "/v1/vault/status", nil)
	rr = httptest.NewRecorder()
	srv.Handler().ServeHTTP(rr, req)
	if rr.Code != http.StatusOK {
		t.Fatalf("status code = %d, want 200", rr.Code)
	}
	resp = nil
	if err := json.NewDecoder(rr.Body).Decode(&resp); err != nil {
		t.Fatalf("decode: %v", err)
	}
	if !resp["sealed"] {
		t.Fatal("vault should be sealed")
	}
}

func TestSealedMiddlewareAPIReturns503(t *testing.T) {
	srv, _, _, _ := newTestServer(t)
	srv.vault.Seal()

	req := httptest.NewRequest(http.MethodGet, "/v1/accounts", nil)
	rr := httptest.NewRecorder()
	srv.Handler().ServeHTTP(rr, req)

	if rr.Code != http.StatusServiceUnavailable {
		t.Fatalf("sealed API status = %d, want 503", rr.Code)
	}

	var resp map[string]string
	if err := json.NewDecoder(rr.Body).Decode(&resp); err != nil {
		t.Fatalf("decode: %v", err)
	}
	if resp["code"] != "vault_sealed" {
		t.Fatalf("error code = %q, want vault_sealed", resp["code"])
	}
}

func TestSealedMiddlewareUIRedirects(t *testing.T) {
	srv, _, _, _ := newTestServer(t)
	srv.vault.Seal()

	req := httptest.NewRequest(http.MethodGet, "/dashboard", nil)
	rr := httptest.NewRecorder()
	srv.Handler().ServeHTTP(rr, req)

	if rr.Code != http.StatusFound {
		t.Fatalf("sealed UI status = %d, want 302", rr.Code)
	}
	loc := rr.Header().Get("Location")
	if loc != "/unseal" {
		t.Fatalf("redirect location = %q, want /unseal", loc)
	}
}

func TestUnsealBadPassphrase(t *testing.T) {
	srv, _, _, _ := newTestServer(t)
	// Start sealed.
	v := vault.NewSealed()
	srv.vault = v

	body := `{"passphrase":"wrong-passphrase"}`
	req := httptest.NewRequest(http.MethodPost, "/v1/vault/unseal", strings.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	rr := httptest.NewRecorder()
	srv.Handler().ServeHTTP(rr, req)

	if rr.Code != http.StatusUnauthorized {
		t.Fatalf("unseal with bad passphrase status = %d, want 401", rr.Code)
	}
}

func TestSealAlreadySealedNoop(t *testing.T) {
	srv, _, priv, _ := newTestServer(t)

	// Seal via API (needs admin token)
	adminToken, _ := issueAdminToken(t, srv, priv, "admin")

	req := httptest.NewRequest(http.MethodPost, "/v1/vault/seal", nil)
	req.Header.Set("Authorization", "Bearer "+adminToken)
	rr := httptest.NewRecorder()
	srv.Handler().ServeHTTP(rr, req)

	if rr.Code != http.StatusOK {
		t.Fatalf("seal status = %d, want 200", rr.Code)
	}

	var resp map[string]string
	if err := json.NewDecoder(rr.Body).Decode(&resp); err != nil {
		t.Fatalf("decode: %v", err)
	}
	if resp["status"] != "sealed" {
		t.Fatalf("seal response status = %q, want sealed", resp["status"])
	}

	// Vault should be sealed now
	if !srv.vault.IsSealed() {
		t.Fatal("vault should be sealed after seal API call")
	}
}