package agent

import (
	"runtime"
	"strings"
	"testing"

	"laodingbot/internal/knowledge"
)

func TestBuildQueryTokensIncludesChineseBigrams(t *testing.T) {
	tokens := buildQueryTokens("请执行命令并查看文件")
	joined := strings.Join(tokens, ",")
	if !strings.Contains(joined, "命令") {
		t.Fatalf("expected token contains 命令, got: %v", tokens)
	}
	if !strings.Contains(joined, "文件") {
		t.Fatalf("expected token contains 文件, got: %v", tokens)
	}
}

func TestSelectRelevantSkillsPrefersMatchingSkill(t *testing.T) {
	o := &Orchestrator{
		skills: []knowledge.Skill{
			{Name: "文件系统查询专家", Content: "适用于目录、文件、路径、命令执行等场景"},
			{Name: "天气查询", Content: "用于天气和空气质量查询"},
			{Name: "日程助手", Content: "用于日程管理"},
		},
	}

	selected := o.selectRelevantSkills("帮我执行命令查看某个文件", 2)
	if len(selected) == 0 {
		t.Fatal("expected non-empty selected skills")
	}
	if selected[0].Name != "文件系统查询专家" {
		t.Fatalf("expected top skill 文件系统查询专家, got: %s", selected[0].Name)
	}
	if len(selected) > 2 {
		t.Fatalf("expected at most 2 skills, got: %d", len(selected))
	}
}

func TestFormatRuntimeContextForPromptIncludesGOOS(t *testing.T) {
	doc := formatRuntimeContextForPrompt()
	if !strings.Contains(strings.ToLower(doc), strings.ToLower(runtime.GOOS)) {
		t.Fatalf("expected runtime context contains GOOS=%s, got: %s", runtime.GOOS, doc)
	}
}

func TestMatchSkillsByNameExact(t *testing.T) {
	all := []knowledge.Skill{
		{Name: "SAFe PI Planning", Content: "PI规划技能"},
		{Name: "文件系统查询专家", Content: "文件查询"},
		{Name: "代码生成", Content: "代码生成技能"},
	}
	matched := matchSkillsByName(all, []string{"SAFe PI Planning"})
	if len(matched) != 1 {
		t.Fatalf("expected 1 match, got %d", len(matched))
	}
	if matched[0].Name != "SAFe PI Planning" {
		t.Fatalf("expected SAFe PI Planning, got %s", matched[0].Name)
	}
}

func TestMatchSkillsByNameFuzzy(t *testing.T) {
	all := []knowledge.Skill{
		{Name: "SAFe PI Planning", Content: "PI规划技能"},
		{Name: "文件系统查询专家", Content: "文件查询"},
	}
	matched := matchSkillsByName(all, []string{"pi planning", "文件"})
	if len(matched) != 2 {
		t.Fatalf("expected 2 matches, got %d", len(matched))
	}
}

func TestMatchSkillsByNameNoMatch(t *testing.T) {
	all := []knowledge.Skill{
		{Name: "文件系统查询专家", Content: "文件查询"},
	}
	matched := matchSkillsByName(all, []string{"不存在的技能"})
	if len(matched) != 0 {
		t.Fatalf("expected 0 matches, got %d", len(matched))
	}
}

func TestMatchSkillsByNameEmpty(t *testing.T) {
	matched := matchSkillsByName(nil, []string{"any"})
	if len(matched) != 0 {
		t.Fatalf("expected 0 matches, got %d", len(matched))
	}
	matched = matchSkillsByName([]knowledge.Skill{{Name: "test"}}, nil)
	if len(matched) != 0 {
		t.Fatalf("expected 0 matches, got %d", len(matched))
	}
}