package workflowdef

import (
	"context"
	"os"
	"path/filepath"
	"strings"

	"github.com/jackc/pgx/v5/pgxpool"

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

func legacySingleStage(key, name, desc, stageKey, taskKey, docType, docTitle, upstream string) CreateDefinitionInput {
	return CreateDefinitionInput{
		Key:           key,
		Name:          name,
		Description:   desc,
		ProductDomain: "medical_device",
		Definition: VersionDefinition{
			SchemaVersion:            1,
			RequiredUpstreamWorkflow: upstream,
			Stages: []StageDef{{
				Key: stageKey, Name: stageKey, Position: 0,
				DocTasks: []DocTaskDef{{
					Key: taskKey, Title: docTitle, Required: true, Blocking: true, DefaultEnabled: true,
					OutputDocType: docType, OutputDocTitle: docTitle,
					TemplateAssetKey: taskKey, TemplateVersion: 1,
				}},
			}},
		},
	}
}

// BootstrapSeeds 幂等导入静态 catalog、首批行业工作流与 templates/docs。
func BootstrapSeeds(ctx context.Context, pool *pgxpool.Pool, cas *storage.CAS, templatesDir string, publishedBy int64) error {
	if pool == nil || !TablesReady(ctx, pool) {
		return nil
	}
	store := NewStore(pool)
	svc := NewService(pool, cas)

	if templatesDir == "" {
		templatesDir = "templates/docs"
	}
	entries, err := os.ReadDir(templatesDir)
	if err != nil {
		return nil
	}
	for _, ent := range entries {
		if ent.IsDir() || !strings.HasSuffix(strings.ToLower(ent.Name()), ".md") {
			continue
		}
		key := strings.TrimSuffix(ent.Name(), filepath.Ext(ent.Name()))
		data, readErr := os.ReadFile(filepath.Join(templatesDir, ent.Name()))
		if readErr != nil || len(data) == 0 {
			continue
		}
		_, _ = svc.UploadTemplate(ctx, key, ent.Name(), data, ent.Name(), publishedBy)
	}

	seeds := []CreateDefinitionInput{
		legacySingleStage("main", "商务与研发综合主线", "V0.1 分诊到 V0.6 阶段评审", "main", "main", "main_proposal", "商务研发综合方案", ""),
		legacySingleStage("product_manager", "智能产品经理", "系统需求规格书生成", "system_reqs", "system_reqs", "system_reqs", "系统需求规格书", ""),
		legacySingleStage("test_manager", "智能测试经理", "系统验证方案及计划", "system_test_plan", "test_manager", "system_test_plan", "系统验证方案及计划", "product_manager"),
		medicalDeviceWorkflow(),
		nonMedicalSoftwareWorkflow(),
	}
	for _, seed := range seeds {
		if err := store.UpsertPublishedSeed(ctx, seed, publishedBy); err != nil {
			return err
		}
	}
	return nil
}

func medicalDeviceWorkflow() CreateDefinitionInput {
	return CreateDefinitionInput{
		Key:           "medical_device_development",
		Name:          "医疗器械研发",
		Description:   "商务摸底 → 需求策划 → 设计开发 → 验证确认 → 设计转移",
		ProductDomain: "medical_device",
		Definition: VersionDefinition{
			SchemaVersion: 1,
			Stages: []StageDef{
				stage("biz_intake", "商务摸底", 0, doc("intake", "客户需求采集", "intake", "客户需求采集表")),
				stage("req_planning", "需求与法规策划", 1, doc("system_reqs", "系统需求规格书", "system_reqs", "系统需求规格书")),
				stage("design_dev", "设计开发", 2, doc("prelim_design", "初步设计", "prelim_design", "初步设计文档")),
				stage("verification", "设计验证/确认", 3, doc("test_manager", "系统验证方案", "system_test_plan", "系统验证方案及计划")),
				stage("transfer", "设计转移/发布", 4, doc("feasibility_reg", "法规可行性", "feasibility_reg", "法规可行性评估")),
			},
		},
	}
}

func nonMedicalSoftwareWorkflow() CreateDefinitionInput {
	return CreateDefinitionInput{
		Key:           "non_medical_software",
		Name:          "非医疗纯软件",
		Description:   "机会范围 → 需求 → 架构 → 实现 → 测试验收 → 发布复盘",
		ProductDomain: "non_medical_software",
		Definition: VersionDefinition{
			SchemaVersion: 1,
			Stages: []StageDef{
				stage("opportunity", "机会与范围", 0, doc("intake", "范围说明", "scope_doc", "项目范围说明")),
				stage("requirements", "产品需求", 1, doc("user_requirements", "用户需求", "user_requirements", "用户需求说明")),
				stage("architecture", "架构与计划", 2, doc("feasibility_dev", "技术可行性", "feasibility_dev", "技术可行性分析")),
				stage("implementation", "实现", 3, doc("prelim_design", "架构设计", "architecture_design", "架构设计文档")),
				stage("testing", "测试与验收", 4, doc("test_manager", "测试计划", "test_plan", "测试计划")),
				stage("release", "发布复盘", 5, doc("research", "发布复盘", "release_review", "发布复盘报告")),
			},
		},
	}
}

func stage(key, name string, pos int, tasks ...DocTaskDef) StageDef {
	return StageDef{Key: key, Name: name, Position: pos, DocTasks: tasks}
}

func doc(key, title, docType, docTitle string) DocTaskDef {
	return DocTaskDef{
		Key: key, Title: title, Required: true, Blocking: true, DefaultEnabled: true,
		TemplateAssetKey: key, TemplateVersion: 1,
		OutputDocType: docType, OutputDocTitle: docTitle,
	}
}

// SeedFromMemoryCatalog 将内存 catalog 转为种子（测试用）。
func SeedFromMemoryCatalog(cat projectworkflow.Catalog) []CreateDefinitionInput {
	if cat == nil {
		return nil
	}
	out := make([]CreateDefinitionInput, 0)
	for _, d := range cat.List() {
		out = append(out, legacySingleStage(d.Key, d.Name, d.Description, d.StageKey, d.TaskKey, d.OutputDocType, d.OutputDocTitle, d.RequiredUpstreamWorkflow))
	}
	return out
}