package server_test

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

	"chat-agent-system/internal/bizdev"
	"chat-agent-system/internal/config"
	"chat-agent-system/internal/ctxmgr"
	"chat-agent-system/internal/server"
)

func TestServer_ChatWindowAndDayAPIs(t *testing.T) {
	cfg := &config.Config{
		Env:      "dev",
		HTTPHost: "127.0.0.1",
		HTTPPort: 8889,
		DataDir:  t.TempDir(),
	}
	svc := bizdev.MustNewService(t, cfg)
	srv := server.NewServer(cfg, svc)
	handler := srv.Routes()

	sessID := "sess_api_window_001"
	userID := int64(1) // 与 AllowInMemory legacy principal 一致

	// 1. 测试 POST /api/v1/chat/messages/import (批量历史回填)
	importBody := []map[string]any{
		{
			"session_id": sessID,
			"user_id":    userID,
			"role":       "user",
			"content":    "9月8日初次需求沟通：规划一款神经外科无线超声",
			"intent":     "SUPPLEMENT_INFO",
			"branch":     "",
			"day_key":    "2026-09-08",
			"created_at": "2026-09-08T09:00:00+08:00",
		},
		{
			"session_id": sessID,
			"user_id":    0,
			"role":       "assistant",
			"content":    "已记录需求，正在检索 NMPA 神经外科超声相关审评要点",
			"intent":     "ADVISOR_BRIEF",
			"branch":     "",
			"day_key":    "2026-09-08",
			"created_at": "2026-09-08T09:00:15+08:00",
		},
		{
			"session_id": sessID,
			"user_id":    userID,
			"role":       "user",
			"content":    "9月10日最新进展：请生成技术方案初步草案",
			"intent":     "TRIGGER_TASK",
			"branch":     "",
			"day_key":    "2026-09-10",
			"created_at": "2026-09-10T10:00:00+08:00",
		},
	}
	bodyBytes, _ := json.Marshal(importBody)

	reqImport := httptest.NewRequest("POST", "/api/v1/chat/messages/import", bytes.NewReader(bodyBytes))
	rrImport := httptest.NewRecorder()
	handler.ServeHTTP(rrImport, reqImport)

	if rrImport.Code != http.StatusOK {
		t.Fatalf("POST /api/v1/chat/messages/import expected 200, got %d: %s", rrImport.Code, rrImport.Body.String())
	}
	var importResp map[string]any
	_ = json.Unmarshal(rrImport.Body.Bytes(), &importResp)
	if int(importResp["imported_count"].(float64)) != 3 {
		t.Fatalf("expected 3 messages imported, got %v", importResp["imported_count"])
	}

	// 2. 测试 GET /api/v1/chat/messages/window
	reqWindow := httptest.NewRequest("GET", "/api/v1/chat/messages/window?session_id="+sessID+"&days=7", nil)
	rrWindow := httptest.NewRecorder()
	handler.ServeHTTP(rrWindow, reqWindow)

	if rrWindow.Code != http.StatusOK {
		t.Fatalf("GET /api/v1/chat/messages/window expected 200, got %d: %s", rrWindow.Code, rrWindow.Body.String())
	}

	var winResult ctxmgr.ChatWindowResult
	if err := json.Unmarshal(rrWindow.Body.Bytes(), &winResult); err != nil {
		t.Fatalf("unmarshal ChatWindowResult failed: %v", err)
	}

	if winResult.SessionID != sessID {
		t.Errorf("expected session_id %s, got %s", sessID, winResult.SessionID)
	}
	if len(winResult.Days) != 2 {
		t.Fatalf("expected 2 days in window, got %d", len(winResult.Days))
	}
	if winResult.Days[0].DayKey != "2026-09-08" || winResult.Days[1].DayKey != "2026-09-10" {
		t.Errorf("expected days [2026-09-08, 2026-09-10], got [%s, %s]", winResult.Days[0].DayKey, winResult.Days[1].DayKey)
	}
	if len(winResult.Days[0].Messages) != 2 || len(winResult.Days[1].Messages) != 1 {
		t.Errorf("unexpected day message counts: day0=%d, day1=%d", len(winResult.Days[0].Messages), len(winResult.Days[1].Messages))
	}

	// 3. 测试 GET /api/v1/chat/dates
	reqDates := httptest.NewRequest("GET", "/api/v1/chat/dates?session_id="+sessID, nil)
	rrDates := httptest.NewRecorder()
	handler.ServeHTTP(rrDates, reqDates)

	if rrDates.Code != http.StatusOK {
		t.Fatalf("GET /api/v1/chat/dates expected 200, got %d: %s", rrDates.Code, rrDates.Body.String())
	}
	var dateStats []ctxmgr.ChatDateStat
	if err := json.Unmarshal(rrDates.Body.Bytes(), &dateStats); err != nil {
		t.Fatalf("unmarshal ChatDateStat failed: %v", err)
	}
	if len(dateStats) != 2 {
		t.Fatalf("expected 2 dates, got %d", len(dateStats))
	}
	if dateStats[0].Count != 2 || dateStats[1].Count != 1 {
		t.Errorf("unexpected date message counts: %v", dateStats)
	}

	// 4. 测试 GET /api/v1/chat/messages/day
	reqDay := httptest.NewRequest("GET", "/api/v1/chat/messages/day?session_id="+sessID+"&date=2026-09-08", nil)
	rrDay := httptest.NewRecorder()
	handler.ServeHTTP(rrDay, reqDay)

	if rrDay.Code != http.StatusOK {
		t.Fatalf("GET /api/v1/chat/messages/day expected 200, got %d: %s", rrDay.Code, rrDay.Body.String())
	}
	var dayRes ctxmgr.ChatDayMessagesResult
	if err := json.Unmarshal(rrDay.Body.Bytes(), &dayRes); err != nil {
		t.Fatalf("unmarshal ChatDayMessagesResult failed: %v", err)
	}
	if dayRes.DayKey != "2026-09-08" || dayRes.TotalCount != 2 || len(dayRes.Messages) != 2 {
		t.Fatalf("unexpected day messages result: %+v", dayRes)
	}

	// 5. 测试 GET /api/v1/chat/categories
	reqCat := httptest.NewRequest("GET", "/api/v1/chat/categories?session_id="+sessID, nil)
	rrCat := httptest.NewRecorder()
	handler.ServeHTTP(rrCat, reqCat)

	if rrCat.Code != http.StatusOK {
		t.Fatalf("GET /api/v1/chat/categories expected 200, got %d: %s", rrCat.Code, rrCat.Body.String())
	}
	var catStats []ctxmgr.ChatCategoryStat
	if err := json.Unmarshal(rrCat.Body.Bytes(), &catStats); err != nil {
		t.Fatalf("unmarshal ChatCategoryStat failed: %v", err)
	}
	if len(catStats) < 2 {
		t.Fatalf("expected at least 2 categories, got %d", len(catStats))
	}
}

func TestServer_ChatWindow_ImportGuard(t *testing.T) {
	// 验证在生产环境中 import 接口被正确拦截
	cfg := &config.Config{
		Env:           "test",
		HTTPHost:      "127.0.0.1",
		HTTPPort:      8889,
		DataDir:       t.TempDir(),
		AllowInMemory: true,
		AgentBackend:  "stub",
	}
	svc := bizdev.MustNewService(t, cfg)
	srv := server.NewServer(cfg, svc)
	cfg.Env = "production"
	handler := srv.Routes()

	reqImport := httptest.NewRequest("POST", "/api/v1/chat/messages/import", bytes.NewReader([]byte("[]")))
	reqImport.Header.Set("Content-Type", "application/json")
	withBearerAuth(reqImport, loginTestAdmin(t, handler, cfg))
	rrImport := httptest.NewRecorder()
	handler.ServeHTTP(rrImport, reqImport)

	if rrImport.Code != http.StatusForbidden {
		t.Fatalf("expected 403 Forbidden in production env, got %d", rrImport.Code)
	}
}

func TestServer_ChatWindow_ImportGuard_EmptyEnvFailsClosed(t *testing.T) {
	// E-5：Env 为空不得视同 dev，导入端点默认拒绝
	cfg := &config.Config{
		Env:           "test",
		HTTPHost:      "127.0.0.1",
		HTTPPort:      8889,
		DataDir:       t.TempDir(),
		AllowInMemory: true,
		AgentBackend:  "stub",
	}
	svc := bizdev.MustNewService(t, cfg)
	srv := server.NewServer(cfg, svc)
	cfg.Env = ""
	t.Setenv("ENABLE_DEV_IMPORT", "")
	handler := srv.Routes()

	reqImport := httptest.NewRequest("POST", "/api/v1/chat/messages/import", bytes.NewReader([]byte("[]")))
	reqImport.Header.Set("Content-Type", "application/json")
	withBearerAuth(reqImport, loginTestAdmin(t, handler, cfg))
	rrImport := httptest.NewRecorder()
	handler.ServeHTTP(rrImport, reqImport)

	if rrImport.Code != http.StatusForbidden {
		t.Fatalf("expected 403 Forbidden when Env is empty, got %d body=%s", rrImport.Code, rrImport.Body.String())
	}
}