package squad

import (
	"bytes"
	"context"
	"os"
	"path/filepath"
	"strings"
	"testing"
	"time"

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

func TestStepEvaluator_InferAssumptionsFromGaps(t *testing.T) {
	evaluator := NewStepEvaluator()

	step := StepSpec{
		ID:                     "step_01_organize",
		Role:                   "organizer",
		AllowDynamicAdjustment: true,
	}

	outputContent := "材料整理完成。目前客户未明确灭菌方式与包装材料，仅注明为一次性无菌介入类医疗器械。"
	bb := &BlackboardState{
		Gaps: []GapItem{
			{ID: "g1", Item: "未提供产品灭菌方式", Blocking: false},
		},
		Assumptions: []AssumptionItem{},
	}

	res, err := evaluator.EvaluateStepOutput("", step, outputContent, bb)
	if err != nil {
		t.Fatalf("EvaluateStepOutput failed: %v", err)
	}

	foundSterilization := false
	for _, a := range res.NewAssumptions {
		if a.Topic == "sterilization_method" {
			foundSterilization = true
			if !strings.Contains(a.Statement, "环氧乙烷") {
				t.Errorf("assumption statement should infer EO sterilization, got %s", a.Statement)
			}
			if a.Source != "inferred" {
				t.Errorf("assumption source should be inferred, got %s", a.Source)
			}
			break
		}
	}

	if !foundSterilization {
		t.Errorf("expected baseline assumption for sterilization_method to be inferred")
	}
}

func TestStepEvaluator_SkipStepDetection(t *testing.T) {
	evaluator := NewStepEvaluator()

	step := StepSpec{
		ID:                     "step_01_organize",
		Role:                   "organizer",
		AllowDynamicAdjustment: true,
	}

	outputContent := "输入材料中已完整包含国内外3款主要竞品型号、市场份额与终端招标定价，竞品数据已全面锁定，无需重复开展市场竞品检索。"
	bb := &BlackboardState{}

	res, err := evaluator.EvaluateStepOutput("", step, outputContent, bb)
	if err != nil {
		t.Fatalf("EvaluateStepOutput failed: %v", err)
	}

	if res.Action != StepActionSkipStep {
		t.Errorf("expected action %s, got %s", StepActionSkipStep, res.Action)
	}

	hasMarketSkip := false
	for _, s := range res.StepsToSkip {
		if s == "step_02_market" || strings.Contains(s, "market") {
			hasMarketSkip = true
			break
		}
	}
	if !hasMarketSkip {
		t.Errorf("expected step_02_market to be in StepsToSkip, got %v", res.StepsToSkip)
	}
}

func TestStepEvaluator_AddStepDetection(t *testing.T) {
	evaluator := NewStepEvaluator()

	step := StepSpec{
		ID:                     "step_01_organize",
		Role:                   "organizer",
		AllowDynamicAdjustment: true,
	}

	outputContent := "梳理发现本项目采用微波射频双极消融技术，输出功率达150W，涉及高频电磁兼容性(EMC)与热灼伤防护特殊工程要求，需重点论证。"
	bb := &BlackboardState{}

	res, err := evaluator.EvaluateStepOutput("", step, outputContent, bb)
	if err != nil {
		t.Fatalf("EvaluateStepOutput failed: %v", err)
	}

	if res.Action != StepActionAddStep {
		t.Errorf("expected action %s, got %s", StepActionAddStep, res.Action)
	}

	if len(res.DynamicStepsToAdd) == 0 {
		t.Fatalf("expected at least 1 dynamic step to be added")
	}

	added := res.DynamicStepsToAdd[0]
	if !strings.Contains(added.ID, "emc") && !strings.Contains(added.Title, "电磁兼容") {
		t.Errorf("expected added step related to EMC/RF, got %s / %s", added.ID, added.Title)
	}
}

func TestWorkflowDriver_DynamicAdjustmentIntegration(t *testing.T) {
	tmpDir, err := os.MkdirTemp("", "wf_eval_test_*")
	if err != nil {
		t.Fatalf("create temp dir: %v", err)
	}
	defer os.RemoveAll(tmpDir)

	engine := NewWorkspaceEngine(nil)
	driver := NewWorkflowDriver(engine)
	evaluator := NewStepEvaluator()
	driver.SetEvaluator(evaluator)

	// 构建一个包含 3 步的工作流
	steps := []StepSpec{
		{
			ID:                     "step_01",
			Role:                   "organizer",
			Title:                  "整理输入材料",
			SubWorkspace:           "tasks/01_organize",
			Mode:                   "execute",
			AllowDynamicAdjustment: true,
		},
		{
			ID:           "step_02",
			Role:         "market",
			Title:        "市场竞品调研",
			SubWorkspace: "tasks/02_market",
			Mode:         "execute",
		},
		{
			ID:           "step_03",
			Role:         "writer",
			Title:        "整合撰写交付初稿",
			SubWorkspace: "tasks/03_draft",
			Mode:         "execute",
		},
	}

	req := WorkspacePrepareRequest{
		WorkDir:       tmpDir,
		TaskKey:       "intake",
		StageTitle:    "需求收集",
		ProjectName:   "射频消融介入系统",
		WorkflowSteps: steps,
	}
	_, err = engine.PrepareWorkspace(req)
	if err != nil {
		t.Fatalf("prepare workspace failed: %v", err)
	}

	// 模拟让 step 1 产出触发跳过 step 2 并添加电磁兼容专题
	step1Dir := filepath.Join(tmpDir, "tasks", "01_organize")
	_ = os.MkdirAll(step1Dir, 0o755)
	_ = os.WriteFile(filepath.Join(step1Dir, "output.md"), []byte(
		"材料梳理完毕。竞品数据已全面锁定，无需重复开展市场竞品检索。同时发现输出功率达150W微波射频高频，需重点论证高频电磁兼容性(EMC)。另外，客户未明确灭菌方式，需做工程假设推演。",
	), 0o644)

	// 创建一个仅执行并模拟写入 output.md 的后端
	backend := &testEchoBackend{}

	res, err := driver.Execute(context.Background(), tmpDir, backend, ExecuteOptions{Timeout: 5 * time.Second})
	if err != nil {
		t.Fatalf("driver.Execute failed: %v", err)
	}

	if !res.Success {
		t.Errorf("driver.Execute expected success")
	}

	// 检验工作流状态：step_02 应被置为 skipped，且动态追加了 emc 步骤
	wf, err := driver.LoadWorkflow(tmpDir)
	if err != nil {
		t.Fatalf("load workflow failed: %v", err)
	}

	foundSkipped := false
	foundEMCAdded := false
	for _, s := range wf.Steps {
		if s.ID == "step_02" && s.Status == "skipped" {
			foundSkipped = true
		}
		if strings.Contains(s.ID, "emc") && s.Status == "completed" {
			foundEMCAdded = true
		}
	}

	if !foundSkipped {
		t.Errorf("step_02 should have been marked as skipped")
	}
	if !foundEMCAdded {
		t.Errorf("dynamic EMC step should have been added and executed")
	}

	// 检验黑板是否成功写入了 baseline assumption
	bb, err := driver.LoadBlackboard(tmpDir)
	if err != nil {
		t.Fatalf("load blackboard failed: %v", err)
	}
	if len(bb.Assumptions) == 0 {
		t.Errorf("expected at least 1 baseline assumption in blackboard")
	} else {
		t.Logf("inferred assumption: %s (%s)", bb.Assumptions[0].Topic, bb.Assumptions[0].Statement)
	}
}

type testEchoBackend struct{}

func (b *testEchoBackend) Name() string { return "test-echo" }

func (b *testEchoBackend) Execute(ctx context.Context, req agent.Request) (*agent.Result, error) {
	// 如果目标文件已存在（如手动预置的 step 1），不覆盖
	target := "output.md"
	if len(req.Targets) > 0 {
		target = req.Targets[0]
	}
	p := filepath.Join(req.WorkDir, target)
	if _, err := os.Stat(p); os.IsNotExist(err) {
		_ = os.WriteFile(p, []byte("## 步骤执行交付产物\n\n已完成任务要求论证与数据沉淀。\n"), 0o644)
	}
	content, err := os.ReadFile(p)
	if err != nil || len(bytes.TrimSpace(content)) == 0 {
		return &agent.Result{Success: false, ErrorReason: "missing target deliverable " + target}, nil
	}
	return &agent.Result{Success: true, Patches: map[string][]byte{target: content}}, nil
}