package webui

import (
	"time"

	"github.com/mudler/LocalAGI/core/state"
	"github.com/mudler/LocalAGI/services/skills"
)

type Config struct {
	DefaultChunkSize          int
	Pool                      *state.AgentPool
	SkillsService             *skills.Service
	ApiKeys                   []string
	LLMAPIURL                 string
	LLMAPIKey                 string
	LLMModel                  string
	StateDir                  string
	CustomActionsDir          string
	ConversationStoreDuration time.Duration

	// Collections / knowledge base (LocalRecall)
	CollectionDBPath string
	FileAssets       string
	VectorEngine     string
	EmbeddingModel   string
	MaxChunkingSize  int
	ChunkOverlap     int
	DatabaseURL      string
	// LocalRAGURL when set uses HTTP backend for collections API; when empty uses in-process backend.
	LocalRAGURL string
}

type Option func(*Config)

func WithDefaultChunkSize(size int) Option {
	return func(c *Config) {
		c.DefaultChunkSize = size
	}
}

func WithConversationStoreduration(duration string) Option {
	return func(c *Config) {
		d, err := time.ParseDuration(duration)
		if err != nil {
			d = 1 * time.Hour
		}
		c.ConversationStoreDuration = d
	}
}

func WithStateDir(dir string) Option {
	return func(c *Config) {
		c.StateDir = dir
	}
}

func WithLLMModel(model string) Option {
	return func(c *Config) {
		c.LLMModel = model
	}
}

func WithLLMAPIUrl(url string) Option {
	return func(c *Config) {
		c.LLMAPIURL = url
	}
}

func WithLLMAPIKey(key string) Option {
	return func(c *Config) {
		c.LLMAPIKey = key
	}
}

func WithCustomActionsDir(dir string) Option {
	return func(c *Config) {
		c.CustomActionsDir = dir
	}
}

func WithPool(pool *state.AgentPool) Option {
	return func(c *Config) {
		c.Pool = pool
	}
}

func WithSkillsService(svc *skills.Service) Option {
	return func(c *Config) {
		c.SkillsService = svc
	}
}

func WithApiKeys(keys ...string) Option {
	return func(c *Config) {
		c.ApiKeys = keys
	}
}

func WithCollectionDBPath(path string) Option {
	return func(c *Config) {
		c.CollectionDBPath = path
	}
}

func WithFileAssets(path string) Option {
	return func(c *Config) {
		c.FileAssets = path
	}
}

func WithVectorEngine(engine string) Option {
	return func(c *Config) {
		c.VectorEngine = engine
	}
}

func WithEmbeddingModel(model string) Option {
	return func(c *Config) {
		c.EmbeddingModel = model
	}
}

func WithMaxChunkingSize(size int) Option {
	return func(c *Config) {
		c.MaxChunkingSize = size
	}
}

func WithChunkOverlap(overlap int) Option {
	return func(c *Config) {
		c.ChunkOverlap = overlap
	}
}

func WithDatabaseURL(url string) Option {
	return func(c *Config) {
		c.DatabaseURL = url
	}
}

func WithLocalRAGURL(url string) Option {
	return func(c *Config) {
		c.LocalRAGURL = url
	}
}

func (c *Config) Apply(opts ...Option) {
	for _, opt := range opts {
		opt(c)
	}
}

func NewConfig(opts ...Option) *Config {
	c := &Config{
		DefaultChunkSize: 2048,
	}
	c.Apply(opts...)
	return c
}