// params — слияние, фильтрация, анализ параметров и ForceNew.
package main

import (
	"sort"
	"strings"
)

func mergeParams(sets ...[]Param) []Param {
	seen := map[string]Param{}
	for _, s := range sets {
		for _, p := range s {
			key := strings.ToLower(strings.TrimSpace(p.Code))
			if key == "" {
				continue
			}
			if _, ok := seen[key]; !ok {
				seen[key] = p
			}
		}
	}
	out := make([]Param, 0, len(seen))
	for _, p := range seen {
		out = append(out, p)
	}
	sort.Slice(out, func(i, j int) bool { return out[i].Code < out[j].Code })
	return out
}

func alignParamTypes(params []Param, schema []Param) []Param {
	if len(params) == 0 || len(schema) == 0 {
		return params
	}
	codeType := make(map[string]string, len(schema))
	for _, p := range schema {
		key := strings.ToLower(strings.TrimSpace(p.Code))
		if key == "" {
			continue
		}
		if strings.TrimSpace(p.Type) != "" {
			codeType[key] = p.Type
		}
	}
	if len(codeType) == 0 {
		return params
	}

	for i, p := range params {
		key := strings.ToLower(strings.TrimSpace(p.Code))
		if key == "" {
			continue
		}
		if t, ok := codeType[key]; ok && strings.TrimSpace(t) != "" {
			params[i].Type = t
		}
	}

	return params
}

func computeCreateOnly(createParams []Param, modifyParams []Param) map[string]struct{} {
	modifyCodes := make(map[string]struct{}, len(modifyParams))
	for _, p := range modifyParams {
		key := strings.ToLower(strings.TrimSpace(p.Code))
		if key == "" {
			continue
		}
		modifyCodes[key] = struct{}{}
	}

	createOnly := make(map[string]struct{})
	for _, p := range createParams {
		key := strings.ToLower(strings.TrimSpace(p.Code))
		if key == "" {
			continue
		}
		if _, ok := modifyCodes[key]; !ok {
			createOnly[key] = struct{}{}
		}
	}

	return createOnly
}

func markCreateOnly(schema []Param, createOnly map[string]struct{}) []Param {
	if len(schema) == 0 || len(createOnly) == 0 {
		return schema
	}

	for i, p := range schema {
		key := strings.ToLower(strings.TrimSpace(p.Code))
		if key == "" {
			continue
		}
		if _, ok := createOnly[key]; ok {
			schema[i].CreateOnly = true
		}
	}

	return schema
}

func filterCreateOnly(schema []Param) []Param {
	if len(schema) == 0 {
		return []Param{}
	}

	result := make([]Param, 0, len(schema))
	for _, p := range schema {
		if p.CreateOnly {
			result = append(result, p)
		}
	}
	return result
}

func filterCreateOnlyRequired(schema []Param) []Param {
	if len(schema) == 0 {
		return []Param{}
	}

	result := make([]Param, 0, len(schema))
	for _, p := range schema {
		if p.CreateOnly && p.Required {
			result = append(result, p)
		}
	}
	return result
}

func analyzeParams(usesBool *bool, usesInt64 *bool, usesString *bool, hasDefaults *bool, needsBoolDefault *bool, needsInt64Default *bool, needsStringDefault *bool, params []Param) {
	for _, p := range params {
		switch strings.ToLower(p.Type) {
		case "bool":
			*usesBool = true
			if p.Default != "" {
				*needsBoolDefault = true
				*hasDefaults = true
			}
		case "int", "int64", "number":
			*usesInt64 = true
			if p.Default != "" {
				*needsInt64Default = true
				*hasDefaults = true
			}
		default:
			*usesString = true
			if p.Default != "" {
				*needsStringDefault = true
				*hasDefaults = true
			}
		}
	}
}


func buildSubresourceForceNewCodes(sr *GenSubresource, createOnly map[string]struct{}) map[string]struct{} {
	forceNew := map[string]struct{}{}
	if sr.ModifyOpName == "" {
		for _, p := range sr.SchemaParams {
			key := strings.ToLower(strings.TrimSpace(p.Code))
			if key != "" {
				forceNew[key] = struct{}{}
			}
		}
		return forceNew
	}
	for key := range createOnly {
		forceNew[key] = struct{}{}
	}
	for _, p := range sr.DeleteParams {
		key := strings.ToLower(strings.TrimSpace(p.Code))
		if key != "" {
			forceNew[key] = struct{}{}
		}
	}
	return forceNew
}

func markForceNew(params []Param, forceNew map[string]struct{}) []Param {
	if len(params) == 0 || len(forceNew) == 0 {
		return params
	}
	for i, p := range params {
		key := strings.ToLower(strings.TrimSpace(p.Code))
		if key == "" {
			continue
		}
		if _, ok := forceNew[key]; ok {
			params[i].ForceNew = true
		}
	}
	return params
}

func filterForceNew(params []Param) []Param {
	result := []Param{}
	for _, p := range params {
		if p.ForceNew {
			result = append(result, p)
		}
	}
	return result
}

// analyzeJsonPlanMod возвращает true, если хотя бы один параметр является JSON-строкой.
// Используется для условного добавления импорта planmodifier в сгенерированные файлы.
func analyzeJsonPlanMod(params []Param) bool {
	for _, p := range params {
		if p.IsJson {
			return true
		}
	}
	return false
}

// hasRestoreCasingParams возвращает true, если есть ref_svc params с RefSvcId > 0 && != 12
// (restore-casing блок в Create/Read/Update использует strings.EqualFold для них).
func hasRestoreCasingParams(params []Param) bool {
	for _, p := range params {
		if p.RefSvcId > 0 && p.RefSvcId != 12 && strings.EqualFold(strings.TrimSpace(p.Type), "string") {
			return true
		}
	}
	return false
}

// analyzeNeedsStrings возвращает true, если среди params есть хотя бы один строковый параметр.
// Используется для условного добавления импорта "strings" (EqualFold в Update).
func analyzeNeedsStrings(params []Param) bool {
	for _, p := range params {
		t := strings.ToLower(strings.TrimSpace(p.Type))
		if t != "bool" && t != "int" && t != "int64" && t != "number" {
			return true
		}
	}
	return false
}

func analyzePlanModifiers(needsBool *bool, needsInt64 *bool, needsString *bool, params []Param) {
	for _, p := range params {
		if !p.ForceNew {
			continue
		}
		switch strings.ToLower(strings.TrimSpace(p.Type)) {
		case "bool":
			*needsBool = true
		case "int", "int64", "number":
			*needsInt64 = true
		default:
			*needsString = true
		}
	}
}