package config

import (
	"os"
	"strconv"
)

type Config struct {
	AppEnv            string
	HTTPAddr          string
	DatabaseURL       string
	RedisURL          string
	RedisKeyPrefix    string
	AuthUsername      string
	AuthPassword      string
	ModelBaseURL      string
	ModelAPIKey       string
	ModelName         string
	ModelContextSize  int
	ModelTimeoutSec   int
	A2AEdgeURL        string
	A2AAgentURL       string
	A2AToken          string
	A2ATimeoutSec     int
	MattermostBaseURL string
	MattermostToken   string
	PlaneBaseURL      string
	PlaneToken        string
}

func Load() Config {
	return Config{
		AppEnv:            getEnv("APP_ENV", "local"),
		HTTPAddr:          getEnv("HTTP_ADDR", ":8080"),
		DatabaseURL:       os.Getenv("DATABASE_URL"),
		RedisURL:          os.Getenv("REDIS_URL"),
		RedisKeyPrefix:    os.Getenv("REDIS_KEY_PREFIX"),
		AuthUsername:      getEnv("AUTH_USERNAME", "nomadcode"),
		AuthPassword:      os.Getenv("AUTH_PASSWORD"),
		ModelBaseURL:      getEnv("MODEL_BASE_URL", "http://192.168.0.91:11434"),
		ModelAPIKey:       getEnv("MODEL_API_KEY", "ollama"),
		ModelName:         getEnv("MODEL_NAME", "qwen3.6:35b-a3b-bf16"),
		ModelContextSize:  getEnvInt("MODEL_CONTEXT_SIZE", 262144),
		ModelTimeoutSec:   getEnvInt("MODEL_TIMEOUT_SEC", 300),
		A2AEdgeURL:        firstEnv("A2A_EDGE_URL", "A2A_AGENT_URL"),
		A2AAgentURL:       firstEnv("A2A_AGENT_URL", "A2A_EDGE_URL"),
		A2AToken:          os.Getenv("A2A_TOKEN"),
		A2ATimeoutSec:     getEnvInt("A2A_TIMEOUT_SEC", 300),
		MattermostBaseURL: os.Getenv("MATTERMOST_BASE_URL"),
		MattermostToken:   os.Getenv("MATTERMOST_TOKEN"),
		PlaneBaseURL:      os.Getenv("PLANE_BASE_URL"),
		PlaneToken:        os.Getenv("PLANE_TOKEN"),
	}
}

func getEnv(key, fallback string) string {
	value := os.Getenv(key)
	if value == "" {
		return fallback
	}
	return value
}

func firstEnv(keys ...string) string {
	for _, key := range keys {
		if value := os.Getenv(key); value != "" {
			return value
		}
	}
	return ""
}

func getEnvInt(key string, fallback int) int {
	value := os.Getenv(key)
	if value == "" {
		return fallback
	}
	parsed, err := strconv.Atoi(value)
	if err != nil {
		return fallback
	}
	return parsed
}