package main

import (
    "github.com/pelletier/go-toml/v2"
    "os"
    "io/ioutil"
    "sync"
    "log"
    "strings"
)

type GenericError struct { msg string }
func (e *GenericError) Error() string { return e.msg }

type MPVPair struct {
    Option string `toml:"option"`
    Value string `toml:"value"`
}

type PodcastConfig struct {
    Name string `toml:"name"`
    URL string `toml:"url"`
    UseAuth bool
    User string `toml:"user"`
    Pass string `toml:"pass"`
    Convert string `toml:"convert"`
    FilterType string `toml:"filter-type"`
    FilterDirAsc bool `toml:"filter-direction-asc"`
    FilterLimit uint `toml:"filter-limit"`
    MPVOptions []MPVPair `toml:"mpv-options"`
}

type ServerConfig struct {
    MediaProxyBaseURL string `toml:"media-proxy-base-url"`
    Port int `toml:"port"`
    Feeds []PodcastConfig `toml:"podcasts"`
    FileRoot string `toml:"file-root"`
    UpdateTimeout uint `toml:"update-timeout"`
}

func (cfg *ServerConfig) Load(path string) error {
    if _, err := os.Stat(path); os.IsNotExist(err) {
        return err;
    }
    file, err := os.Open(path)
    if err!=nil {
        return err
    }
    defer file.Close()
    content, err := ioutil.ReadAll(file)
    if err!=nil {
        return err
    }
    if err := toml.Unmarshal(content, cfg); err!=nil {
        return err
    }
    for _, feed := range cfg.Feeds {
        if strings.Contains(feed.Name, "/") {
            log.Fatal("invalid feed name contains '/': "+feed.Name)
        }
        if feed.User!="" && feed.Pass!="" {
            feed.UseAuth = true
        } else {
            feed.UseAuth = false
        }
    }
    return nil
}

type FeedCacheEntry struct {
    Mutex sync.Mutex
    Text string
}

type FeedCacheS struct {
    Texts map[string]string
    sync.Mutex
}

type ServerContext struct {
    Config ServerConfig
    WG sync.WaitGroup
    IsActive bool
    FeedCache FeedCacheS
}

func (ctx *ServerContext) LoadConfig(path string) error {
    ctx.FeedCache.Texts = make(map[string]string)
    return ctx.Config.Load(path);
}