package server_test

import (
	"bytes"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"strconv"
	"strings"
	"testing"
	"time"

	"chat-agent-system/internal/projectworkflow"
)

// 与 tasks/run/stream 对齐：无-live 项目上非成员不得因 stage unrestricted 而进入对话；
// chat/stream 拒绝必须发生在 SSE headers/Flush 之前（结构化 JSON 403）。

func TestChatProjectAccess_NonMemberDeniedBeforeSSE_PG(t *testing.T) {
	pool := openPGPoolWithMigrations(t)
	if pool == nil {
		return
	}
	defer pool.Close()

	handler, _ := setupPGGovernanceServer(t, pool)
	creatorToken := loginTestUser(t, handler, "zhanggong", "123456")
	outsiderToken := loginTestUser(t, handler, "lizhuguan", "123456")

	createBody, _ := json.Marshal(projectworkflow.CreateProjectInput{Name: "Chat Access NoLive " + time.Now().Format("150405.000")})
	reqCreate := httptest.NewRequest(http.MethodPost, "/api/v1/projects", bytes.NewReader(createBody))
	withBearerAuth(reqCreate, creatorToken)
	recCreate := httptest.NewRecorder()
	handler.ServeHTTP(recCreate, reqCreate)
	if recCreate.Code != http.StatusCreated {
		t.Fatalf("create project: %d %s", recCreate.Code, recCreate.Body.String())
	}
	var proj projectworkflow.Project
	_ = json.Unmarshal(recCreate.Body.Bytes(), &proj)
	t.Cleanup(func() { cleanupProject(t, pool, proj.ID) })

	syncBody, _ := json.Marshal(map[string]any{
		"session_id": "sess-chat-outsider-sync",
		"message":    "首轮 intake 试探",
		"project_id": proj.ID,
	})
	reqSync := httptest.NewRequest(http.MethodPost, "/api/v1/chat", bytes.NewReader(syncBody))
	withBearerAuth(reqSync, outsiderToken)
	recSync := httptest.NewRecorder()
	handler.ServeHTTP(recSync, reqSync)
	if recSync.Code != http.StatusForbidden {
		t.Fatalf("outsider sync chat expected 403, got %d: %s", recSync.Code, recSync.Body.String())
	}
	if !strings.Contains(recSync.Body.String(), "ERR_FORBIDDEN") {
		t.Fatalf("expected ERR_FORBIDDEN json, got %s", recSync.Body.String())
	}

	streamBody, _ := json.Marshal(map[string]any{
		"session_id": "sess-chat-outsider-stream",
		"message":    "首轮 intake 流式",
		"project_id": proj.ID,
	})
	reqStream := httptest.NewRequest(http.MethodPost, "/api/v1/chat/stream", bytes.NewReader(streamBody))
	withBearerAuth(reqStream, outsiderToken)
	recStream := httptest.NewRecorder()
	handler.ServeHTTP(recStream, reqStream)
	if recStream.Code != http.StatusForbidden {
		t.Fatalf("outsider chat/stream expected 403 (not 200 SSE), got %d body=%s", recStream.Code, recStream.Body.String())
	}
	ct := recStream.Header().Get("Content-Type")
	if strings.Contains(ct, "text/event-stream") {
		t.Fatalf("forbidden chat/stream must not set text/event-stream before reject, got %q", ct)
	}
	if !strings.Contains(recStream.Body.String(), "ERR_FORBIDDEN") {
		t.Fatalf("expected structured ERR_FORBIDDEN before flush, got %s", recStream.Body.String())
	}
}

func TestChatProjectAccess_CreatorAndMemberAllowed_PG(t *testing.T) {
	pool := openPGPoolWithMigrations(t)
	if pool == nil {
		return
	}
	defer pool.Close()

	handler, _ := setupPGGovernanceServer(t, pool)
	creatorToken := loginTestUser(t, handler, "zhanggong", "123456")
	memberToken := loginTestUser(t, handler, "lizhuguan", "123456")
	memberID := fetchAuthUserID(t, handler, memberToken)

	createBody, _ := json.Marshal(projectworkflow.CreateProjectInput{Name: "Chat Access Member " + time.Now().Format("150405.000")})
	reqCreate := httptest.NewRequest(http.MethodPost, "/api/v1/projects", bytes.NewReader(createBody))
	withBearerAuth(reqCreate, creatorToken)
	recCreate := httptest.NewRecorder()
	handler.ServeHTTP(recCreate, reqCreate)
	if recCreate.Code != http.StatusCreated {
		t.Fatalf("create: %d %s", recCreate.Code, recCreate.Body.String())
	}
	var proj projectworkflow.Project
	_ = json.Unmarshal(recCreate.Body.Bytes(), &proj)
	t.Cleanup(func() { cleanupProject(t, pool, proj.ID) })

	addBody, _ := json.Marshal(map[string]any{"user_id": memberID, "project_role": "member"})
	reqAdd := httptest.NewRequest(http.MethodPost, "/api/v1/projects/"+strconv.FormatInt(proj.ID, 10)+"/members", bytes.NewReader(addBody))
	withBearerAuth(reqAdd, creatorToken)
	recAdd := httptest.NewRecorder()
	handler.ServeHTTP(recAdd, reqAdd)
	if recAdd.Code != http.StatusCreated && recAdd.Code != http.StatusOK {
		t.Fatalf("add member: %d %s", recAdd.Code, recAdd.Body.String())
	}

	for _, tc := range []struct {
		name  string
		token string
	}{
		{"creator", creatorToken},
		{"member", memberToken},
	} {
		body, _ := json.Marshal(map[string]any{
			"session_id": "sess-chat-ok-" + tc.name,
			"message":    "hello",
			"project_id": proj.ID,
		})
		req := httptest.NewRequest(http.MethodPost, "/api/v1/chat", bytes.NewReader(body))
		withBearerAuth(req, tc.token)
		rec := httptest.NewRecorder()
		handler.ServeHTTP(rec, req)
		if rec.Code != http.StatusOK {
			t.Fatalf("%s sync chat want 200 got %d %s", tc.name, rec.Code, rec.Body.String())
		}

		sBody, _ := json.Marshal(map[string]any{
			"session_id": "sess-chat-ok-stream-" + tc.name,
			"message":    "hello stream",
			"project_id": proj.ID,
		})
		sReq := httptest.NewRequest(http.MethodPost, "/api/v1/chat/stream", bytes.NewReader(sBody))
		withBearerAuth(sReq, tc.token)
		sRec := httptest.NewRecorder()
		handler.ServeHTTP(sRec, sReq)
		if sRec.Code != http.StatusOK {
			t.Fatalf("%s chat/stream want 200 got %d %s", tc.name, sRec.Code, sRec.Body.String())
		}
		if !strings.Contains(sRec.Header().Get("Content-Type"), "text/event-stream") {
			t.Fatalf("%s chat/stream should be SSE after auth, ct=%q", tc.name, sRec.Header().Get("Content-Type"))
		}
	}
}