package daemon

import (
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"path/filepath"
	"testing"

	"git.cloudinit.dev/coreci/orca/internal/store"
)

func newTestServer(t *testing.T) *Server {
	t.Helper()
	db, err := store.Open(filepath.Join(t.TempDir(), "test.db"))
	if err != nil {
		t.Fatalf("open db: %v", err)
	}
	t.Cleanup(func() { _ = db.Close() })

	s := NewServer(Options{DB: db, Log: nil, Addr: "127.0.0.1:0"})
	s.MarkReady()
	return s
}

func TestHealthzReturns200(t *testing.T) {
	s := newTestServer(t)
	req := httptest.NewRequest("GET", "/healthz", nil)
	rr := httptest.NewRecorder()
	s.mux().ServeHTTP(rr, req)

	if rr.Code != 200 {
		t.Errorf("expected 200, got %d", rr.Code)
	}
	var body map[string]any
	_ = json.NewDecoder(rr.Body).Decode(&body)
	if body["status"] != "alive" {
		t.Errorf("expected status alive, got %v", body["status"])
	}
}

func TestReadyzReturns200WhenReady(t *testing.T) {
	s := newTestServer(t)
	s.MarkReady()
	req := httptest.NewRequest("GET", "/readyz", nil)
	rr := httptest.NewRecorder()
	s.mux().ServeHTTP(rr, req)
	if rr.Code != 200 {
		t.Errorf("expected 200, got %d", rr.Code)
	}
}

func TestReadyzReturns503WhenNotReady(t *testing.T) {
	s := newTestServer(t)
	s.MarkNotReady()
	req := httptest.NewRequest("GET", "/readyz", nil)
	rr := httptest.NewRecorder()
	s.mux().ServeHTTP(rr, req)
	if rr.Code != 503 {
		t.Errorf("expected 503, got %d", rr.Code)
	}
}

func TestStatusReturns200(t *testing.T) {
	s := newTestServer(t)
	s.MarkReady()
	req := httptest.NewRequest("GET", "/v1/status", nil)
	rr := httptest.NewRecorder()
	s.mux().ServeHTTP(rr, req)
	if rr.Code != 200 {
		t.Errorf("expected 200, got %d", rr.Code)
	}
	var body map[string]any
	_ = json.NewDecoder(rr.Body).Decode(&body)
	if body["db"] != "ok" {
		t.Errorf("expected db ok, got %v", body["db"])
	}
	if body["milestone"] != "v0.1" {
		t.Errorf("expected milestone v0.1, got %v", body["milestone"])
	}
}

func TestJobsCollectionEmpty(t *testing.T) {
	s := newTestServer(t)
	req := httptest.NewRequest("GET", "/v1/jobs", nil)
	rr := httptest.NewRecorder()
	s.mux().ServeHTTP(rr, req)
	if rr.Code != 200 {
		t.Errorf("expected 200, got %d", rr.Code)
	}
	var body map[string]any
	_ = json.NewDecoder(rr.Body).Decode(&body)
	if body["count"].(float64) != 0 {
		t.Errorf("expected count 0, got %v", body["count"])
	}
}

func TestJobsCollectionMethodNotAllowed(t *testing.T) {
	s := newTestServer(t)
	req := httptest.NewRequest("PUT", "/v1/jobs", nil)
	rr := httptest.NewRecorder()
	s.mux().ServeHTTP(rr, req)
	if rr.Code != http.StatusMethodNotAllowed {
		t.Errorf("expected 405, got %d", rr.Code)
	}
}

func TestJobsItemNotFound(t *testing.T) {
	s := newTestServer(t)
	req := httptest.NewRequest("GET", "/v1/jobs/nonexistent", nil)
	rr := httptest.NewRecorder()
	s.mux().ServeHTTP(rr, req)
	if rr.Code != http.StatusNotFound {
		t.Errorf("expected 404, got %d", rr.Code)
	}
}

func TestJobsItemInvalidID(t *testing.T) {
	s := newTestServer(t)
	req := httptest.NewRequest("GET", "/v1/jobs/has%20space", nil)
	rr := httptest.NewRecorder()
	s.mux().ServeHTTP(rr, req)
	if rr.Code != http.StatusBadRequest {
		t.Errorf("expected 400, got %d", rr.Code)
	}
}

func TestNodesCollectionEmpty(t *testing.T) {
	s := newTestServer(t)
	req := httptest.NewRequest("GET", "/v1/nodes", nil)
	rr := httptest.NewRecorder()
	s.mux().ServeHTTP(rr, req)
	if rr.Code != 200 {
		t.Errorf("expected 200, got %d", rr.Code)
	}
	var body map[string]any
	_ = json.NewDecoder(rr.Body).Decode(&body)
	if body["count"].(float64) != 0 {
		t.Errorf("expected count 0, got %v", body["count"])
	}
}

func TestTasksCollectionEmpty(t *testing.T) {
	s := newTestServer(t)
	req := httptest.NewRequest("GET", "/v1/tasks", nil)
	rr := httptest.NewRecorder()
	s.mux().ServeHTTP(rr, req)
	if rr.Code != 200 {
		t.Errorf("expected 200, got %d", rr.Code)
	}
}

func TestTasksCollectionInvalidLimit(t *testing.T) {
	s := newTestServer(t)
	req := httptest.NewRequest("GET", "/v1/tasks?limit=abc", nil)
	rr := httptest.NewRecorder()
	s.mux().ServeHTTP(rr, req)
	if rr.Code != http.StatusBadRequest {
		t.Errorf("expected 400, got %d", rr.Code)
	}
}

func TestValidateID(t *testing.T) {
	cases := []struct {
		id    string
		valid bool
	}{
		{"abc-123", true},
		{"550e8400-e29b-41d4-a716-446655440000", true},
		{"a", true},
		{"", false},
		{"has space", false},
		{"with/slash", false},
		{"../etc/passwd", false},
		{string([]byte{0x00, 'a'}), false},
	}
	for _, c := range cases {
		err := validateID(c.id)
		if (err == nil) != c.valid {
			t.Errorf("validateID(%q): valid=%v, err=%v", c.id, c.valid, err)
		}
	}
}