// writers — генерация Go-файлов ресурсов и registry.go.
package main

import (
	"bytes"
	"fmt"
	"os"
	"path/filepath"
	"text/template"
)

func writeInstanceResource(outDir string, svc GenResource) error {
	fileName := fmt.Sprintf("%d_%s_resource.go", svc.ServiceID, svc.Name)
	filePath := filepath.Join(outDir, fileName)

	tpl, err := template.New("resource").Funcs(template.FuncMap{
		"ToCamel":          toCamel,
		"ToSnake":          toSnake,
		"ParamType":        paramType,
		"ParamDefaultExpr": paramDefaultExpr,
		"ParamFormat":      paramFormat,
		"ParamParse":       paramParse,
		"ParamDescription": paramDescription,
		"OutputType":       outputParamType,
		"OutputIsMap":      outputParamIsMap,
		"OutputIsList":     outputParamIsList,
		"OutputSensitive":  outputParamSensitive,
		"bt":               func() string { return "`" },
	}).Parse(instanceTemplate)
	if err != nil {
		return err
	}

	var buf bytes.Buffer
	if err := tpl.Execute(&buf, svc); err != nil {
		return err
	}

	formatted := formatSourceOrWarn(filePath, buf.Bytes())

	return os.WriteFile(filePath, formatted, 0644)
}

func writeSubresource(outDir string, sr GenSubresource) error {
	name := fmt.Sprintf("%s_%s", sr.ServiceName, sr.SubName)
	fileName := fmt.Sprintf("%d_%s_resource.go", sr.ServiceID, name)
	filePath := filepath.Join(outDir, fileName)

	tpl, err := template.New("subresource").Funcs(template.FuncMap{
		"ToCamel":          toCamel,
		"ToSnake":          toSnake,
		"ParamType":        paramType,
		"ParamDefaultExpr": paramDefaultExpr,
		"ParamFormat":      paramFormat,
		"ParamParse":       paramParse,
		"ParamDescription": paramDescription,
		"PlanModifierType": planModifierType,
		"PlanModifierExpr": planModifierExpr,
		"bt":               func() string { return "`" },
	}).Parse(subresourceTemplate)
	if err != nil {
		return err
	}

	var buf bytes.Buffer
	if err := tpl.Execute(&buf, sr); err != nil {
		return err
	}

	formatted := formatSourceOrWarn(filePath, buf.Bytes())

	return os.WriteFile(filePath, formatted, 0644)
}

func writeActionResource(outDir string, act GenAction) error {
	name := fmt.Sprintf("%s_%s", act.ServiceName, act.ActionName)
	fileName := fmt.Sprintf("%d_%s_action.go", act.ServiceID, name)
	filePath := filepath.Join(outDir, fileName)

	tpl, err := template.New("action").Funcs(template.FuncMap{
		"ToCamel":          toCamel,
		"ToSnake":          toSnake,
		"ParamType":        paramType,
		"ParamDefaultExpr": paramDefaultExpr,
		"ParamFormat":      paramFormat,
		"ParamParse":       paramParse,
		"ParamDescription": paramDescription,
		"bt":               func() string { return "`" },
	}).Parse(actionTemplate)
	if err != nil {
		return err
	}

	var buf bytes.Buffer
	if err := tpl.Execute(&buf, act); err != nil {
		return err
	}

	formatted := formatSourceOrWarn(filePath, buf.Bytes())

	return os.WriteFile(filePath, formatted, 0644)
}

func writeRegistry(outDir string, services []GenResource, subs []GenSubresource, actions []GenAction) error {
	var buf bytes.Buffer
	buf.WriteString("package resources_gen\n\n")
	buf.WriteString("import \"github.com/hashicorp/terraform-plugin-framework/resource\"\n\n")
	buf.WriteString("// Code generated by tools/gen_v2. DO NOT EDIT.\n")
	buf.WriteString("func AllResources() []func() resource.Resource {\n")
	buf.WriteString("\treturn []func() resource.Resource{\n")
	for _, svc := range services {
		buf.WriteString(fmt.Sprintf("\t\tNew%[1]sResource,\n", toCamel(svc.Name)))
	}
	for _, sr := range subs {
		buf.WriteString(fmt.Sprintf("\t\tNew%[1]sResource,\n", toCamel(sr.ServiceName+"_"+sr.SubName)))
	}
	for _, act := range actions {
		buf.WriteString(fmt.Sprintf("\t\tNew%[1]sResource,\n", toCamel(act.ServiceName+"_"+act.ActionName)))
	}
	buf.WriteString("\t}\n")
	buf.WriteString("}\n")

	regPath := filepath.Join(outDir, "registry.go")
	formatted := formatSourceOrWarn(regPath, buf.Bytes())

	return os.WriteFile(regPath, formatted, 0644)
}