package api

import (
	"path/filepath"
	"strings"

	"github.com/yaoapp/gou/process"
	"github.com/yaoapp/kun/exception"
	"github.com/yaoapp/yao/sui/core"
)

func init() {
	process.RegisterGroup("sui", map[string]process.Handler{
		"template.get":   TemplateGet,
		"template.find":  TemplateFind,
		"template.asset": TemplateAsset,

		"locale.get": LocaleGet,
		"theme.get":  ThemeGet,

		"block.get":  BlockGet,
		"block.find": BlockFind,

		"component.get":  ComponentGet,
		"component.find": ComponentFind,

		"page.tree":  PageTree,
		"page.get":   PageGet,
		"page.asset": PageAsset,

		"editor.render": EditorRender,
		"editor.source": EditorSource,
	})
}

// TemplateGet handle the get Template request
// Process sui.<ID>.templates
func TemplateGet(process *process.Process) interface{} {
	process.ValidateArgNums(1)

	sui := get(process)
	templates, err := sui.GetTemplates()
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}
	return templates
}

// TemplateFind handle the find Template request
func TemplateFind(process *process.Process) interface{} {
	process.ValidateArgNums(2)

	sui := get(process)
	tmpl, err := sui.GetTemplate(process.ArgsString(1))
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}

	return tmpl
}

// TemplateAsset handle the find Template request
func TemplateAsset(process *process.Process) interface{} {
	process.ValidateArgNums(3)
	sui := get(process)
	tmpl, err := sui.GetTemplate(process.ArgsString(1))
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}

	asset, err := tmpl.Asset(process.ArgsString(2))
	if err != nil {
		exception.New(err.Error(), 404).Throw()
	}

	return map[string]interface{}{
		"content": asset.Content,
		"type":    asset.Type,
	}
}

// LocaleGet handle the find Template request
func LocaleGet(process *process.Process) interface{} {
	process.ValidateArgNums(2)

	sui := get(process)
	template, err := sui.GetTemplate(process.ArgsString(1))
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}

	return template.Locales()
}

// ThemeGet handle the find Template request
func ThemeGet(process *process.Process) interface{} {
	process.ValidateArgNums(2)

	sui := get(process)
	template, err := sui.GetTemplate(process.ArgsString(1))
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}

	return template.Themes()
}

// BlockGet handle the find Template request
func BlockGet(process *process.Process) interface{} {
	process.ValidateArgNums(2)

	sui := get(process)
	templateID := process.ArgsString(1)

	tmpl, err := sui.GetTemplate(templateID)
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}

	blocks, err := tmpl.Blocks()
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}
	return blocks
}

// BlockFind handle the find Template request
func BlockFind(process *process.Process) interface{} {
	process.ValidateArgNums(3)

	sui := get(process)
	templateID := process.ArgsString(1)
	blockID := strings.TrimRight(process.ArgsString(2), ".js")

	tmpl, err := sui.GetTemplate(templateID)
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}

	block, err := tmpl.Block(blockID)
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}

	return block.Source()
}

// ComponentGet handle the find Template request
func ComponentGet(process *process.Process) interface{} {
	process.ValidateArgNums(2)

	sui := get(process)
	templateID := process.ArgsString(1)

	tmpl, err := sui.GetTemplate(templateID)
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}

	components, err := tmpl.Components()
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}
	return components
}

// ComponentFind handle the find Template request
func ComponentFind(process *process.Process) interface{} {
	process.ValidateArgNums(3)

	sui := get(process)
	templateID := process.ArgsString(1)
	componentID := strings.TrimRight(process.ArgsString(2), ".js")

	tmpl, err := sui.GetTemplate(templateID)
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}

	component, err := tmpl.Component(componentID)
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}
	return component.Source()
}

// PageTree handle the find Template request
func PageTree(process *process.Process) interface{} {
	process.ValidateArgNums(2)

	sui := get(process)
	templateID := process.ArgsString(1)

	tmpl, err := sui.GetTemplate(templateID)
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}

	route := route(process, 2)
	tree, err := tmpl.PageTree(route)
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}
	return tree
}

// PageGet handle the find Template request
func PageGet(process *process.Process) interface{} {
	process.ValidateArgNums(2)

	sui := get(process)
	templateID := process.ArgsString(1)

	tmpl, err := sui.GetTemplate(templateID)
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}

	tree, err := tmpl.Pages()
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}
	return tree
}

// PageAsset handle the find Template request
func PageAsset(process *process.Process) interface{} {
	process.ValidateArgNums(3)

	sui := get(process)
	templateID := process.ArgsString(1)

	tmpl, err := sui.GetTemplate(templateID)
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}

	file := process.ArgsString(2)
	page, err := tmpl.GetPageFromAsset(file)
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}

	var asset *core.Asset

	switch filepath.Ext(file) {
	case ".css":
		asset, err = page.AssetStyle()
		if err != nil {
			exception.New(err.Error(), 400).Throw()
		}
		break

	case ".js", ".ts":
		asset, err = page.AssetScript()
		if err != nil {
			exception.New(err.Error(), 400).Throw()
		}
		break

	default:
		exception.New("does not support the %s file", 400, filepath.Ext(file)).Throw()
	}

	return map[string]interface{}{
		"content": asset.Content,
		"type":    asset.Type,
	}
}

// EditorRender handle the render page request
func EditorRender(process *process.Process) interface{} {
	process.ValidateArgNums(3)

	sui := get(process)
	templateID := process.ArgsString(1)
	route := route(process, 2)
	query := process.ArgsMap(3, map[string]interface{}{"method": "GET"})

	tmpl, err := sui.GetTemplate(templateID)
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}

	page, err := tmpl.Page(route)
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}

	// Request data
	req := &core.Request{Method: query["method"].(string)}

	res, err := page.EditorRender(req)
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}

	return res
}

// EditorSource handle the render page request
func EditorSource(process *process.Process) interface{} {
	process.ValidateArgNums(3)

	sui := get(process)
	templateID := process.ArgsString(1)
	route := route(process, 2)
	kind := process.ArgsString(3)

	tmpl, err := sui.GetTemplate(templateID)
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}

	page, err := tmpl.Page(route)
	if err != nil {
		exception.New(err.Error(), 500).Throw()
	}

	switch kind {

	case "page":
		return page.EditorPageSource()

	case "style":
		return page.EditorStyleSource()

	case "script":
		return page.EditorScriptSource()

	case "data":
		return page.EditorDataSource()

	default:
		exception.New("the %s source does not exist", 404, kind).Throw()
		return nil
	}
}

// get the sui
func get(process *process.Process) core.SUI {
	sui, has := core.SUIs[process.ArgsString(0)]
	if !has {
		exception.New("the sui %s does not exist", 404, process.ID).Throw()
	}
	return sui
}

func route(process *process.Process, i int) string {
	route := process.ArgsString(i)
	if route == "" {
		route = "/index"
	}

	if route[0] != '/' {
		route = "/" + route
	}
	return route
}