1package cli
  2
  3import (
  4	"fmt"
  5	"os"
  6	"strings"
  7
  8	"github.com/alexflint/go-arg"
  9)
 10
 11var (
 12	Version   string
 13	BuildDate string
 14)
 15
 16// Args represents command-line arguments.
 17type Args struct {
 18	FeedsFile string `arg:"-f,--feeds-file,required" help:"Path to file containing RSS feed URLs (one per line)"`
 19	Prompt    string `arg:"-p,--prompt,required" help:"User prompt for summarisation/analysis"`
 20
 21	// Feed aggregation options
 22	MaxArticlesPerFeed *int `arg:"-n,--max-articles-per-feed" help:"Maximum articles to fetch from each feed"`
 23	MaxDaysOld         *int `arg:"-d,--max-days-old" help:"Only include articles from the last N days"`
 24	MaxTotalArticles   *int `arg:"--max-total-articles" help:"Maximum total articles to process"`
 25
 26	// Content filtering
 27	IncludeKeywords string `arg:"-i,--include-keywords" help:"Comma-separated list of keywords to include (case-insensitive)"`
 28	ExcludeKeywords string `arg:"-e,--exclude-keywords" help:"Comma-separated list of keywords to exclude (case-insensitive)"`
 29
 30	// LLM API options
 31	APIKey      *string  `arg:"--api-key" help:"OpenAI-compatible API key (default: read from LLM_AGGREGATOR_API_KEY env var)"`
 32	BaseURL     *string  `arg:"--base-url" help:"API base URL"`
 33	Model       *string  `arg:"-m,--model" help:"LLM model to use"`
 34	MaxTokens   *int     `arg:"--max-tokens" help:"Maximum tokens in response"`
 35	Temperature *float64 `arg:"--temperature" help:"Sampling temperature (0.0 to 1.0)"`
 36
 37	// Output options
 38	Output          string `arg:"-o,--output" help:"Output format" choice:"text,json,markdown"`
 39	OutputFile      string `arg:"--output-file" help:"Write output to file (default: stdout)"`
 40	IncludeArticles bool   `arg:"--include-articles" help:"Include original articles in JSON output"`
 41
 42	// System options
 43	SystemPrompt string `arg:"--system-prompt" help:"Custom system prompt for LLM"`
 44	TUI          bool   `arg:"-t,--tui" help:"Enable TUI interface with progress bar"`
 45	Verbose      bool   `arg:"-v,--verbose" help:"Show verbose output"`
 46	ShowVersion  bool   `arg:"--version" help:"Show version"`
 47	DryRun       bool   `arg:"-D,--dry-run" help:"Validate config, show article statistics, and exit without making LLM API calls"`
 48}
 49
 50// Version returns the version string.
 51func (Args) Version() string {
 52	return fmt.Sprintf("llm_aggregator v%s (built %s)", Version, BuildDate)
 53}
 54
 55// Description returns the program description.
 56func (Args) Description() string {
 57	return "LLM Aggregator - Aggregate RSS feeds and summarise with LLM API"
 58}
 59
 60// ParseKeywords parses comma-separated keywords string into list.
 61func ParseKeywords(keywordString string) []string {
 62	if keywordString == "" {
 63		return nil
 64	}
 65	keywords := strings.Split(keywordString, ",")
 66	result := make([]string, 0, len(keywords))
 67	for _, kw := range keywords {
 68		if trimmed := strings.TrimSpace(kw); trimmed != "" {
 69			result = append(result, trimmed)
 70		}
 71	}
 72	return result
 73}
 74
 75// ParseArgs parses command line arguments.
 76func ParseArgs() (*Args, error) {
 77	var args Args
 78	parser, err := arg.NewParser(arg.Config{
 79		Program: "llm_aggregator",
 80	}, &args)
 81	if err != nil {
 82		return nil, err
 83	}
 84
 85	// Handle help and version flags before checking required fields
 86	if len(os.Args) > 1 {
 87		if os.Args[1] == "-h" || os.Args[1] == "--help" {
 88			WriteHelp(&args, os.Stdout)
 89			os.Exit(0)
 90		}
 91		if os.Args[1] == "--version" {
 92			fmt.Printf("llm_aggregator v%s (built %s)", Version, BuildDate)
 93			os.Exit(0)
 94		}
 95	}
 96
 97	err = parser.Parse(os.Args[1:])
 98	if err != nil {
 99		return nil, err
100	}
101
102	return &args, nil
103}
104
105// ToViperMap converts Args to a map for binding to Viper.
106// Only non-nil values (explicitly provided CLI flags) are included.
107//
108// NOTE: FeedsFile and Prompt are strings (not pointers), so they're ALWAYS
109// included if non-empty. This differs from optional fields which use pointer
110// types to detect explicit provision vs. default zero values. See isZero() in
111// config package.
112func (a *Args) ToViperMap() map[string]any {
113	m := map[string]any{}
114	if a.FeedsFile != "" {
115		m["feeds_file"] = a.FeedsFile
116	}
117	if a.MaxArticlesPerFeed != nil {
118		m["max_articles_per_feed"] = *a.MaxArticlesPerFeed
119	}
120	if a.MaxDaysOld != nil {
121		m["max_days_old"] = *a.MaxDaysOld
122	}
123	if a.MaxTotalArticles != nil {
124		m["max_total_articles"] = *a.MaxTotalArticles
125	}
126	if a.IncludeKeywords != "" {
127		m["include_keywords"] = a.IncludeKeywords
128	}
129	if a.ExcludeKeywords != "" {
130		m["exclude_keywords"] = a.ExcludeKeywords
131	}
132	if a.APIKey != nil {
133		m["api_key"] = *a.APIKey
134	}
135	if a.BaseURL != nil {
136		m["base_url"] = *a.BaseURL
137	}
138	if a.Model != nil {
139		m["model"] = *a.Model
140	}
141	if a.MaxTokens != nil {
142		m["max_tokens"] = *a.MaxTokens
143	}
144	if a.Temperature != nil {
145		m["temperature"] = *a.Temperature
146	}
147	if a.Prompt != "" {
148		m["prompt"] = a.Prompt
149	}
150	if a.SystemPrompt != "" {
151		m["system_prompt"] = a.SystemPrompt
152	}
153	if a.Output != "" {
154		m["output"] = a.Output
155	}
156	if a.OutputFile != "" {
157		m["output_file"] = a.OutputFile
158	}
159	if a.IncludeArticles {
160		m["include_articles"] = a.IncludeArticles
161	}
162	return m
163}