package workflow_executions

import (
	"context"
	"fmt"
	"sort"
	"strings"

	. "git.gorlug.de/code/ersteller"
	"git.gorlug.de/code/ersteller/schema/ent"
	"git.gorlug.de/code/ersteller/schema/ent/generalqueue"
	"git.gorlug.de/code/ersteller/workflow"
	hx "maragu.dev/gomponents-htmx"

	. "maragu.dev/gomponents"
	. "maragu.dev/gomponents/html"
)

const WorkflowExecutionsPath = "/workflow-executions"
const WorkflowExecutionsPathDe = "/workflow-ausfuehrungen"

var texts *Texts

type Texts struct {
	PageTitle          I18nText
	PageDescription    I18nText
	HeroTitle          I18nText
	TriggerPlaceholder I18nText
	TriggerButton      I18nText
}

type Page struct {
	createPage CreateHtmxPageFunc
	db         *ent.Client
	wf         *workflow.Workflow

	ViewRoute    HtmxRoute
	TriggerRoute HtmxRoute
}

func NewPage(createPage CreateHtmxPageFunc, server HtmxServer, path *ActivePath, db *ent.Client, wf *workflow.Workflow) *Page {
	if texts == nil {
		createTexts()
	}
	p := &Page{createPage: createPage, db: db, wf: wf}
	p.ViewRoute = NewHtmxGetRoute(p.View, LanguagePaths{En: WorkflowExecutionsPath, De: WorkflowExecutionsPathDe}).SetActivePath(path)
	p.ViewRoute.Add(server)

	p.TriggerRoute = NewHtmxPostRoute(p.Trigger, LanguagePaths{En: WorkflowExecutionsPath + "/trigger", De: WorkflowExecutionsPathDe + "/trigger"})
	p.TriggerRoute.Add(server)
	return p
}

func createTexts() {
	texts = &Texts{
		PageTitle:          NewI18nText(map[Language]string{En: "Workflow Executions", De: "Workflow-Ausführungen"}),
		PageDescription:    NewI18nText(map[Language]string{En: "Monitor workflow executions", De: "Überwache Workflow-Ausführungen"}),
		HeroTitle:          NewI18nText(map[Language]string{En: "Workflow Executions", De: "Workflow-Ausführungen"}),
		TriggerPlaceholder: NewI18nText(map[Language]string{En: "Input for workflow", De: "Input für Workflow"}),
		TriggerButton:      NewI18nText(map[Language]string{En: "Trigger Workflow", De: "Workflow starten"}),
	}
}

func (p *Page) getMetaData() PageWebsiteMetaData {
	return PageWebsiteMetaData{
		Title:       texts.PageTitle,
		Lang:        En,
		Description: texts.PageDescription,
	}
}

func (p *Page) View(c HtmxContext) {
	language := c.GetLanguage()

	// Query all jobs ordered by created_at desc
	jobs, _ := p.db.GeneralQueue.Query().
		Order(ent.Desc(generalqueue.FieldCreatedAt)).
		All(context.Background())

	// Group jobs by workflow_id
	executions := make(map[string][]*ent.GeneralQueue)
	var workflowIds []string
	for _, j := range jobs {
		if j.WorkflowID == "" {
			continue
		}
		if _, ok := executions[j.WorkflowID]; !ok {
			workflowIds = append(workflowIds, j.WorkflowID)
		}
		executions[j.WorkflowID] = append(executions[j.WorkflowID], j)
	}

	content := Group{
		Div(Class("hero-section"),
			H1(Class("hero-title"), Text(texts.HeroTitle.FromLang(language))),
		),
		Div(Class("content-section"),
			p.triggerForm(c),
			Div(ID("executions-list"), p.executionsList(c, workflowIds, executions)),
		),
	}
	p.createPage(c, p.getMetaData(), content)
}

func (p *Page) triggerForm(c HtmxContext) Node {
	lang := c.GetLanguage()
	return Form(p.TriggerRoute.GetHtmx(lang),
		hx.Target("#executions-list"),
		hx.Swap("outerHTML"),
		Div(Class("form-row"),
			Input(Type("text"), Name("input"), Placeholder(texts.TriggerPlaceholder.FromLang(lang))),
			Button(Type("submit"), Text(texts.TriggerButton.FromLang(lang))),
		),
	)
}

func (p *Page) executionsList(c HtmxContext, workflowIds []string, executions map[string][]*ent.GeneralQueue) Node {
	items := make([]Node, 0, len(workflowIds))
	for _, id := range workflowIds {
		items = append(items, p.executionItem(id, executions[id]))
	}
	return Div(Class("executions-container"), Group(items))
}

func (p *Page) executionItem(workflowId string, jobs []*ent.GeneralQueue) Node {
	// Sort jobs by created_at within execution
	sort.Slice(jobs, func(i, j int) bool {
		return jobs[i].CreatedAt.Before(jobs[j].CreatedAt)
	})

	jobNodes := make([]Node, 0, len(jobs))
	for _, j := range jobs {
		jobNodes = append(jobNodes, Div(Class("job-step"),
			H4(Text(fmt.Sprintf("Step: %s", j.Name))),
			P(Text(fmt.Sprintf("Status: %s", j.Status))),
			P(Text(fmt.Sprintf("Tries: %d/%d", j.NumberOfTries, j.MaxRetries))),
			If(j.ErrorMessage != "", P(Class("error-message"), Text(fmt.Sprintf("Error: %s", j.ErrorMessage)))),
			If(len(j.Payload) > 0, Details(Summary(Text("Payload")), Pre(Class("payload-pre"), Text(fmt.Sprintf("%+v", j.Payload))))),
			If(len(j.ResultPayload) > 0, Details(Summary(Text("Result")), Pre(Class("result-pre"), Text(fmt.Sprintf("%+v", j.ResultPayload))))),
		))
	}

	return Div(Class("execution-card"),
		H3(Text(fmt.Sprintf("Execution: %s", workflowId))),
		Div(Class("steps-list"), Group(jobNodes)),
		Hr(),
	)
}

func (p *Page) Trigger(c HtmxContext) {
	input := strings.TrimSpace(c.GetFormValue("input"))

	payload := map[string]interface{}{
		"workflowId": p.wf.GenerateId(),
		"input":      input,
	}

	err := p.wf.Execute(context.Background(), payload)
	if err != nil {
		// handle error?
	}

	p.renderList(c)
}

func (p *Page) renderList(c HtmxContext) {
	jobs, _ := p.db.GeneralQueue.Query().
		Order(ent.Desc(generalqueue.FieldCreatedAt)).
		All(context.Background())

	executions := make(map[string][]*ent.GeneralQueue)
	var workflowIds []string
	for _, j := range jobs {
		if j.WorkflowID == "" {
			continue
		}
		if _, ok := executions[j.WorkflowID]; !ok {
			workflowIds = append(workflowIds, j.WorkflowID)
		}
		executions[j.WorkflowID] = append(executions[j.WorkflowID], j)
	}

	c.Render(Div(ID("executions-list"), p.executionsList(c, workflowIds, executions)))
}