package template

import (
	"text/template"

	"git.warky.dev/wdevs/relspecgo/pkg/models"
)

// BuildFuncMap creates a template.FuncMap with all available helper functions
func BuildFuncMap() template.FuncMap {
	return template.FuncMap{
		// String manipulation functions
		"toUpper":        ToUpper,
		"toLower":        ToLower,
		"toCamelCase":    ToCamelCase,
		"toPascalCase":   ToPascalCase,
		"toSnakeCase":    ToSnakeCase,
		"toKebabCase":    ToKebabCase,
		"pluralize":      Pluralize,
		"singularize":    Singularize,
		"title":          Title,
		"trim":           Trim,
		"trimPrefix":     TrimPrefix,
		"trimSuffix":     TrimSuffix,
		"replace":        Replace,
		"stringContains": StringContains, // Avoid conflict with slice contains
		"hasPrefix":      HasPrefix,
		"hasSuffix":      HasSuffix,
		"split":          Split,
		"join":           Join,

		// Type conversion functions
		"sqlToGo":         SQLToGo,
		"sqlToTypeScript": SQLToTypeScript,
		"sqlToJava":       SQLToJava,
		"sqlToPython":     SQLToPython,
		"sqlToRust":       SQLToRust,
		"sqlToCSharp":     SQLToCSharp,
		"sqlToPhp":        SQLToPhp,

		// Filtering functions
		"filterTables":            FilterTables,
		"filterTablesByPattern":   FilterTablesByPattern,
		"filterColumns":           FilterColumns,
		"filterColumnsByType":     FilterColumnsByType,
		"filterPrimaryKeys":       FilterPrimaryKeys,
		"filterForeignKeys":       FilterForeignKeys,
		"filterUniqueConstraints": FilterUniqueConstraints,
		"filterCheckConstraints":  FilterCheckConstraints,
		"filterNullable":          FilterNullable,
		"filterNotNull":           FilterNotNull,

		// Formatting functions
		"toJSON":        ToJSON,
		"toJSONPretty":  ToJSONPretty,
		"toYAML":        ToYAML,
		"indent":        Indent,
		"indentWith":    IndentWith,
		"escape":        Escape,
		"escapeQuotes":  EscapeQuotes,
		"comment":       Comment,
		"quoteString":   QuoteString,
		"unquoteString": UnquoteString,

		// Loop/iteration helper functions
		"enumerate": Enumerate,
		"batch":     Batch,
		"chunk":     Chunk,
		"reverse":   Reverse,
		"first":     First,
		"last":      Last,
		"skip":      Skip,
		"take":      Take,
		"concat":    Concat,
		"unique":    Unique,
		"sortBy":    SortBy,
		"groupBy":   GroupBy,

		// Safe access functions
		"get":           Get,
		"getOr":         GetOr,
		"getPath":       GetPath,
		"getPathOr":     GetPathOr,
		"safeIndex":     SafeIndex,
		"safeIndexOr":   SafeIndexOr,
		"has":           Has,
		"hasPath":       HasPath,
		"keys":          Keys,
		"values":        Values,
		"merge":         Merge,
		"pick":          Pick,
		"omit":          Omit,
		"sliceContains": SliceContains,
		"indexOf":       IndexOf,
		"pluck":         Pluck,

		// Sorting functions
		"sortSchemasByName":          models.SortSchemasByName,
		"sortSchemasBySequence":      models.SortSchemasBySequence,
		"sortTablesByName":           models.SortTablesByName,
		"sortTablesBySequence":       models.SortTablesBySequence,
		"sortColumnsByName":          models.SortColumnsByName,
		"sortColumnsBySequence":      models.SortColumnsBySequence,
		"sortColumnsMapByName":       models.SortColumnsMapByName,
		"sortColumnsMapBySequence":   models.SortColumnsMapBySequence,
		"sortViewsByName":            models.SortViewsByName,
		"sortViewsBySequence":        models.SortViewsBySequence,
		"sortSequencesByName":        models.SortSequencesByName,
		"sortSequencesBySequence":    models.SortSequencesBySequence,
		"sortIndexesByName":          models.SortIndexesByName,
		"sortIndexesBySequence":      models.SortIndexesBySequence,
		"sortIndexesMapByName":       models.SortIndexesMapByName,
		"sortIndexesMapBySequence":   models.SortIndexesMapBySequence,
		"sortConstraintsByName":      models.SortConstraintsByName,
		"sortConstraintsMapByName":   models.SortConstraintsMapByName,
		"sortRelationshipsByName":    models.SortRelationshipsByName,
		"sortRelationshipsMapByName": models.SortRelationshipsMapByName,
		"sortScriptsByName":          models.SortScriptsByName,
		"sortEnumsByName":            models.SortEnumsByName,

		// Utility functions (built-in Go template helpers + custom)
		"add": func(a, b int) int { return a + b },
		"sub": func(a, b int) int { return a - b },
		"mul": func(a, b int) int { return a * b },
		"div": func(a, b int) int {
			if b == 0 {
				return 0
			}
			return a / b
		},
		"mod": func(a, b int) int {
			if b == 0 {
				return 0
			}
			return a % b
		},
		"default": func(defaultVal, val interface{}) interface{} {
			if val == nil {
				return defaultVal
			}
			return val
		},
		"dict": func(values ...interface{}) map[string]interface{} {
			if len(values)%2 != 0 {
				return nil
			}
			dict := make(map[string]interface{}, len(values)/2)
			for i := 0; i < len(values); i += 2 {
				key, ok := values[i].(string)
				if !ok {
					return nil
				}
				dict[key] = values[i+1]
			}
			return dict
		},
		"list": func(values ...interface{}) []interface{} {
			return values
		},
		"seq": func(start, end int) []int {
			if start > end {
				return []int{}
			}
			result := make([]int, end-start+1)
			for i := range result {
				result[i] = start + i
			}
			return result
		},
	}
}