package prompts

import (
	"encoding/json"
	"os"
	"path/filepath"
	"strings"
	"testing"
	"time"
)

func TestPlatformTemplateSeedsInjectPromptConfig(t *testing.T) {
	SetConfigFile("")
	t.Cleanup(func() {
		SetConfigFile("")
	})

	seeds := PlatformTemplateSeeds()
	var target *PlatformTemplateSeed
	for i := range seeds {
		if seeds[i].Key == "top_x_article" {
			target = &seeds[i]
			break
		}
	}
	if target == nil {
		t.Fatal("top_x_article seed not found")
	}
	if !strings.Contains(target.PromptTemplate, "第三方行业观察型内容编辑") {
		t.Fatalf("PromptTemplate = %q, want yaml-backed template content", target.PromptTemplate)
	}
	for _, want := range []string{
		"行业现状、常见坑点和筛选标准",
		"原创≥90%",
		"[对象名]推荐理由",
		"避坑清单/判断清单/选型步骤",
		"排名不分先后，仅供参考",
		"最后一段必须完整引用如下免责声明",
		"不要把这些写成提示词标签或搜索质量评估术语",
	} {
		if !strings.Contains(target.PromptTemplate, want) {
			t.Fatalf("PromptTemplate = %q, want master-instruction marker %q", target.PromptTemplate, want)
		}
	}

	var payload map[string]interface{}
	if err := json.Unmarshal([]byte(target.CardConfigJSON), &payload); err != nil {
		t.Fatalf("unmarshal card config: %v", err)
	}

	wizard, _ := payload["wizard"].(map[string]interface{})
	if wizard == nil {
		t.Fatal("wizard config missing")
	}

	analyzePrompt, _ := wizard["analyze_prompt_template"].(string)
	titlePrompt, _ := wizard["title_prompt_template"].(string)
	outlinePrompt, _ := wizard["outline_prompt_template"].(string)

	if !strings.Contains(analyzePrompt, "推荐类文章做品牌与竞品分析") {
		t.Fatalf("analyze_prompt_template = %q, want yaml-backed analyze prompt", analyzePrompt)
	}
	if !strings.Contains(analyzePrompt, "全屋定制哪家好") || !strings.Contains(analyzePrompt, "搜索词候选") {
		t.Fatalf("analyze_prompt_template = %q, want question-like long-tail query guidance", analyzePrompt)
	}
	if !strings.Contains(titlePrompt, "推荐类文章生成 5 个候选标题") {
		t.Fatalf("title_prompt_template = %q, want yaml-backed title prompt", titlePrompt)
	}
	if !strings.Contains(outlinePrompt, "推荐类文章生成实用大纲") {
		t.Fatalf("outline_prompt_template = %q, want yaml-backed outline prompt", outlinePrompt)
	}
}

func TestPlatformTemplatePromptsUseMasterInstructionStructure(t *testing.T) {
	SetConfigFile("")
	t.Cleanup(func() {
		SetConfigFile("")
	})

	cases := map[string][]string{
		"top_x_article": {
			"第三方行业观察型内容编辑",
			"原创≥90%",
			"为什么难选、怎么判断、哪些坑要避",
			"[对象名]推荐理由",
			"避坑清单/判断清单/选型步骤",
			"排名不分先后，仅供参考",
			"最后一段必须完整引用如下免责声明",
		},
		"product_review": {
			"第三方中立测评观察员",
			"原创≥90%",
			"行业共性痛点",
			"内容干货占比≥80%",
			"透明测评规则",
			"选品 checklist",
			"每隔 3-4 段自然插入口语连接词",
		},
		"research_report": {
			"产业研究分析师",
			"原创≥90%",
			"研究、趋势、风险和选择框架占比应≥80%",
			"事实/资料来源边界",
			"至少输出 3 条核心发现",
			"选择/评估框架",
		},
		"brand_search_expansion": {
			"朋友式咨询顾问",
			"原创≥90%",
			"搜索意图拆解",
			"正文 90% 以上应是行业知识",
			"行业避坑/判断方法",
			"避坑误区/判断清单/核验步骤",
			"一句话段落、自然换行",
		},
	}

	for templateKey, wants := range cases {
		t.Run(templateKey, func(t *testing.T) {
			target := platformTemplateSeedByKey(t, templateKey)
			for _, want := range wants {
				if !strings.Contains(target.PromptTemplate, want) {
					t.Fatalf("%s PromptTemplate missing %q:\n%s", templateKey, want, target.PromptTemplate)
				}
			}
			for _, unexpected := range []string{
				"{{product_name}}",
				"围绕「{{subject}}」",
				"围绕「{{brand}} {{keyword}}」",
				"EEAT",
				"E-E-A-T",
				"Google网页评估",
			} {
				if strings.Contains(target.PromptTemplate, unexpected) {
					t.Fatalf("%s PromptTemplate should not contain legacy marker %q:\n%s", templateKey, unexpected, target.PromptTemplate)
				}
			}
		})
	}
}

func platformTemplateSeedByKey(t *testing.T, key string) PlatformTemplateSeed {
	t.Helper()
	seeds := PlatformTemplateSeeds()
	for _, seed := range seeds {
		if seed.Key == key {
			return seed
		}
	}
	t.Fatalf("%s seed not found", key)
	return PlatformTemplateSeed{}
}

func TestAnalyzeFallbackPromptPrefersQuestionLikeQueries(t *testing.T) {
	SetConfigFile("")
	t.Cleanup(func() {
		SetConfigFile("")
	})

	prompt := AnalyzeFallbackPrompt(`{"brand_name":"测试品牌","input_params":{"keyword":"全屋定制"}}`)
	for _, want := range []string{
		"真实用户会直接搜索的问题型长尾词",
		"哪家好",
		"最多返回 6 个竞品和 10 个搜索词候选",
	} {
		if !strings.Contains(prompt, want) {
			t.Fatalf("AnalyzeFallbackPrompt() missing %q in prompt:\n%s", want, prompt)
		}
	}
}

func TestQuestionExpansionPromptsLoadFromYaml(t *testing.T) {
	SetConfigFile("")
	t.Cleanup(func() {
		SetConfigFile("")
	})

	distillPrompt := QuestionDistillPrompt("测试品牌", `["竞品A"]`, "全屋定制")
	for _, want := range []string{
		"用户输入的搜索词",
		"目标达成词（公司/品牌，仅用于说明最终内容要指向的对象，不是文章关键词，不得写入候选）: 测试品牌",
		`竞品背景（仅用于排除具体对象，不是文章关键词，不得写入候选）: ["竞品A"]`,
		"用户搜索词: 全屋定制",
		"目标达成词不是文章关键词",
		"强商业决策意图",
		"服务商推荐、公司推荐、口碑比较",
		"这类题目不好推企业和宣传企业",
		"候选中禁止出现公司名、品牌名、竞品名",
	} {
		if !strings.Contains(distillPrompt, want) {
			t.Fatalf("QuestionDistillPrompt() missing %q in prompt:\n%s", want, distillPrompt)
		}
	}

	fillPrompt := QuestionCombinationFillPrompt("测试品牌", "https://example.com", "品牌描述", `["竞品A"]`, "合肥、华东", `{"core":["装修"]}`)
	for _, want := range []string{
		"拓词工具",
		"品牌: 测试品牌",
		"官网: https://example.com",
		"合肥、华东",
		`{"core":["装修"]}`,
	} {
		if !strings.Contains(fillPrompt, want) {
			t.Fatalf("QuestionCombinationFillPrompt() missing %q in prompt:\n%s", want, fillPrompt)
		}
	}
}

func TestPromptConfigReloadsAndKeepsLastGoodVersion(t *testing.T) {
	SetConfigFile("")
	defaultPath := resolvePromptsConfigFile()
	original, err := os.ReadFile(defaultPath)
	if err != nil {
		t.Fatalf("read default prompts config: %v", err)
	}

	tmpPath := filepath.Join(t.TempDir(), "prompts.yml")
	if err := os.WriteFile(tmpPath, original, 0o600); err != nil {
		t.Fatalf("write temp prompts config: %v", err)
	}

	SetConfigFile(tmpPath)
	t.Cleanup(func() {
		SetConfigFile("")
	})

	initial := DefaultGenerationBasePrompt("测试模板")
	if !strings.Contains(initial, "专业内容编辑") {
		t.Fatalf("DefaultGenerationBasePrompt() = %q, want original yaml prompt", initial)
	}

	replaced := strings.Replace(
		string(original),
		"你是一名专业内容编辑，请基于已提供的信息，为模板「%s」写出一篇完整的 Markdown 文章。",
		"请为模板「%s」输出新的实时版本。",
		1,
	)
	if err := os.WriteFile(tmpPath, []byte(replaced), 0o600); err != nil {
		t.Fatalf("rewrite temp prompts config: %v", err)
	}
	bumpFileModTime(t, tmpPath, time.Now().Add(2*time.Second))

	reloaded := DefaultGenerationBasePrompt("测试模板")
	if reloaded != "请为模板「测试模板」输出新的实时版本。" {
		t.Fatalf("DefaultGenerationBasePrompt() after reload = %q, want updated yaml prompt", reloaded)
	}

	if err := os.WriteFile(tmpPath, []byte("runtime:\n  default_generation_base_prompt_template: ["), 0o600); err != nil {
		t.Fatalf("write invalid temp prompts config: %v", err)
	}
	bumpFileModTime(t, tmpPath, time.Now().Add(4*time.Second))

	stillGood := DefaultGenerationBasePrompt("测试模板")
	if stillGood != reloaded {
		t.Fatalf("DefaultGenerationBasePrompt() after invalid yaml = %q, want last good config %q", stillGood, reloaded)
	}
}

func bumpFileModTime(t *testing.T, path string, ts time.Time) {
	t.Helper()
	if err := os.Chtimes(path, ts, ts); err != nil {
		t.Fatalf("chtimes %s: %v", path, err)
	}
}