use std::env;
use std::fs;
use std::path::{Path, PathBuf};
use std::str::FromStr;

use anyhow::{anyhow, Context, Result};
use directories::BaseDirs;
use serde::{Deserialize, Serialize};

use crate::cli::{Cli, ColorMode, JobsArg, LlmMode, ProviderChoice, ReportFormat};

#[derive(Clone, Debug)]
pub struct Settings {
    pub input: PathBuf,
    pub output: PathBuf,
    pub provider: ProviderChoice,
    pub api_key_omdb: Option<String>,
    pub api_key_tmdb: Option<String>,
    pub cache_path: PathBuf,
    pub cache_ttl_days: u32,
    pub refresh_cache: bool,
    pub report_format: ReportFormat,
    pub report_path: Option<PathBuf>,
    pub sidecar_notes: bool,
    pub sidecars: bool,
    pub overwrite: bool,
    pub suffix: bool,
    pub min_score: u8,
    pub include_id: bool,
    pub quality_tags: QualityTags,
    pub color: ColorMode,
    pub llm: LlmSettings,
    pub jobs: usize,
    pub net_jobs: usize,
    pub no_lookup: bool,
    pub dry_run: bool,
    pub dry_run_summary: bool,
    pub move_files: bool,
    pub rename_in_place: bool,
    pub interactive: bool,
    pub verbose: bool,
    pub explain: bool,
    pub omdb_base_url: String,
    pub tmdb_base_url: String,
}

#[derive(Clone, Debug)]
pub struct QualityTags {
    pub resolution: bool,
    pub codec: bool,
    pub source: bool,
}

impl Default for QualityTags {
    fn default() -> Self {
        Self {
            resolution: true,
            codec: false,
            source: false,
        }
    }
}

impl QualityTags {
    pub fn to_list(&self) -> Vec<String> {
        let mut tags = Vec::new();
        if self.resolution {
            tags.push("resolution".to_string());
        }
        if self.codec {
            tags.push("codec".to_string());
        }
        if self.source {
            tags.push("source".to_string());
        }
        if tags.is_empty() {
            tags.push("none".to_string());
        }
        tags
    }
}

#[derive(Clone, Debug)]
pub struct LlmSettings {
    pub mode: LlmMode,
    pub endpoint: String,
    pub model: Option<String>,
    pub timeout_seconds: u64,
    pub max_tokens: Option<u32>,
}

#[derive(Debug, Serialize)]
struct PrintableSettings {
    input: String,
    output: String,
    provider: ProviderChoice,
    api_key_omdb: Option<String>,
    api_key_tmdb: Option<String>,
    cache_path: String,
    cache_ttl_days: u32,
    refresh_cache: bool,
    report_format: ReportFormat,
    report_path: Option<String>,
    sidecar_notes: bool,
    sidecars: bool,
    dry_run_summary: bool,
    overwrite: bool,
    suffix: bool,
    min_score: u8,
    include_id: bool,
    quality_tags: Vec<String>,
    color: ColorMode,
    jobs: usize,
    net_jobs: usize,
    no_lookup: bool,
    dry_run: bool,
    move_files: bool,
    rename_in_place: bool,
    interactive: bool,
    verbose: bool,
    explain: bool,
    omdb_base_url: String,
    tmdb_base_url: String,
    llm: PrintableLlm,
}

#[derive(Debug, Serialize)]
struct PrintableLlm {
    mode: LlmMode,
    endpoint: String,
    model: Option<String>,
    timeout_seconds: u64,
    max_tokens: Option<u32>,
}

impl Default for LlmSettings {
    fn default() -> Self {
        Self {
            mode: LlmMode::Off,
            endpoint: "http://localhost:11434".to_string(),
            model: None,
            timeout_seconds: 30,
            max_tokens: None,
        }
    }
}

#[derive(Debug, Deserialize, Default)]
struct FileConfig {
    provider: Option<ProviderChoice>,
    api_key_omdb: Option<String>,
    api_key_tmdb: Option<String>,
    cache_path: Option<PathBuf>,
    cache_ttl_days: Option<u32>,
    refresh_cache: Option<bool>,
    report_format: Option<ReportFormat>,
    sidecar_notes: Option<bool>,
    sidecars: Option<bool>,
    overwrite: Option<bool>,
    suffix: Option<bool>,
    min_score: Option<u8>,
    include_id: Option<bool>,
    quality_tags: Option<QualityTagsValue>,
    color: Option<ColorMode>,
    jobs: Option<JobValue>,
    net_jobs: Option<JobValue>,
    llm: Option<FileLlmConfig>,
    omdb_base_url: Option<String>,
    tmdb_base_url: Option<String>,
    no_lookup: Option<bool>,
    dry_run_summary: Option<bool>,
    explain: Option<bool>,
}

#[derive(Debug, Deserialize, Default)]
struct FileLlmConfig {
    mode: Option<LlmMode>,
    endpoint: Option<String>,
    model: Option<String>,
    timeout_seconds: Option<u64>,
    max_tokens: Option<u32>,
}

#[derive(Debug, Deserialize)]
#[serde(untagged)]
enum QualityTagsValue {
    List(Vec<String>),
    Single(String),
}

#[derive(Debug, Deserialize)]
#[serde(untagged)]
enum JobValue {
    String(String),
    Number(u64),
}

pub fn build_settings(cli: &Cli) -> Result<Settings> {
    let config_path = resolve_config_path(cli.config.as_deref())?;
    if let Err(err) = ensure_default_config(&config_path) {
        eprintln!(
            "Warning: failed to create default config at {}: {}",
            config_path.display(),
            err
        );
    }
    let file_config = load_config_file(&config_path)?;

    let input = cli
        .input
        .clone()
        .ok_or_else(|| anyhow!("--input is required unless --completions is used"))?;
    let output = resolve_output(cli, &input)?;

    let mut settings = Settings {
        input,
        output,
        provider: ProviderChoice::Auto,
        api_key_omdb: None,
        api_key_tmdb: None,
        cache_path: default_cache_path()?,
        cache_ttl_days: 30,
        refresh_cache: false,
        report_format: ReportFormat::Text,
        report_path: resolve_report_path(cli)?,
        sidecar_notes: false,
        sidecars: false,
        overwrite: false,
        suffix: false,
        min_score: 80,
        include_id: false,
        quality_tags: QualityTags::default(),
        color: ColorMode::Auto,
        llm: LlmSettings::default(),
        jobs: default_jobs(),
        net_jobs: default_net_jobs(default_jobs()),
        no_lookup: false,
        dry_run: cli.dry_run,
        dry_run_summary: false,
        move_files: cli.move_files,
        rename_in_place: cli.rename_in_place,
        interactive: cli.interactive,
        verbose: cli.verbose,
        explain: false,
        omdb_base_url: "https://www.omdbapi.com".to_string(),
        tmdb_base_url: "https://api.themoviedb.org/3".to_string(),
    };

    apply_file_config(&mut settings, &file_config)?;
    apply_env_overrides(&mut settings)?;
    apply_cli_overrides(&mut settings, cli)?;

    validate_settings(&mut settings)?;

    Ok(settings)
}

pub fn init_default_config() -> Result<PathBuf> {
    let config_path = resolve_config_path(None)?;
    ensure_default_config(&config_path)?;
    Ok(config_path)
}

fn resolve_output(cli: &Cli, input: &Path) -> Result<PathBuf> {
    match (cli.rename_in_place, cli.output.as_ref()) {
        (true, None) => Ok(input.to_path_buf()),
        (true, Some(out)) => {
            if out != input {
                Err(anyhow!(
                    "--rename-in-place requires output to be omitted or the same as input"
                ))
            } else {
                Ok(out.clone())
            }
        }
        (false, Some(out)) => {
            if out == input {
                Err(anyhow!(
                    "output directory must be different from input unless --rename-in-place is set"
                ))
            } else {
                Ok(out.clone())
            }
        }
        (false, None) => Err(anyhow!("--output is required unless --rename-in-place is set")),
    }
}

fn resolve_config_path(cli_path: Option<&Path>) -> Result<PathBuf> {
    if let Some(path) = cli_path {
        return Ok(path.to_path_buf());
    }
    let dirs = BaseDirs::new().ok_or_else(|| anyhow!("unable to resolve XDG config directory"))?;
    Ok(dirs.config_dir().join("mov-renamarr").join("config.toml"))
}

fn default_cache_path() -> Result<PathBuf> {
    let dirs = BaseDirs::new().ok_or_else(|| anyhow!("unable to resolve XDG cache directory"))?;
    Ok(dirs.cache_dir().join("mov-renamarr").join("cache.db"))
}

fn load_config_file(path: &Path) -> Result<FileConfig> {
    if !path.exists() {
        return Ok(FileConfig::default());
    }
    let raw = fs::read_to_string(path)
        .with_context(|| format!("failed to read config file: {}", path.display()))?;
    let cfg: FileConfig = toml::from_str(&raw)
        .with_context(|| format!("failed to parse config TOML: {}", path.display()))?;
    Ok(cfg)
}

fn ensure_default_config(path: &Path) -> Result<bool> {
    if path.exists() {
        return Ok(false);
    }
    if let Some(parent) = path.parent() {
        fs::create_dir_all(parent)
            .with_context(|| format!("failed to create config dir: {}", parent.display()))?;
    }
    fs::write(path, default_config_template())
        .with_context(|| format!("failed to write default config: {}", path.display()))?;
    eprintln!(
        "Created default config at {}. You can edit it to set API keys and preferences.",
        path.display()
    );
    Ok(true)
}

fn default_config_template() -> String {
    [
        "# Mov Renamarr configuration (TOML)",
        "# Edit this file to set API keys and defaults.",
        "# Values here override built-in defaults and can be overridden by env/CLI.",
        "",
        "# Provider selection:",
        "# - auto: pick based on available API keys (prefers TMDb if both set).",
        "# - tmdb / omdb: force a single provider.",
        "# - both: query both and choose best match.",
        "provider = \"auto\"",
        "",
        "# API keys (set at least one).",
        "# TMDb accepts either v3 API key or v4 Read Access Token (Bearer).",
        "# api_key_tmdb = \"YOUR_TMDB_KEY_OR_READ_ACCESS_TOKEN\"",
        "# api_key_omdb = \"YOUR_OMDB_KEY\"",
        "",
        "# Cache settings",
        "# cache_path lets you override the default XDG cache location.",
        "# cache_path = \"/home/user/.cache/mov-renamarr/cache.db\"",
        "# cache_ttl_days controls how long cached API results are reused.",
        "cache_ttl_days = 30",
        "# refresh_cache forces new lookups on next run.",
        "refresh_cache = false",
        "",
        "# Output and reporting",
        "# report_format: text (default), json, or csv.",
        "report_format = \"text\"",
        "# sidecar_notes writes a per-file note when a file is skipped/failed.",
        "sidecar_notes = false",
        "# sidecars copies/moves subtitle/nfo/etc files with the movie file.",
        "sidecars = false",
        "# dry_run_summary suppresses per-file output (use with --dry-run for large batches).",
        "dry_run_summary = false",
        "# overwrite replaces existing files; suffix adds \" (1)\", \" (2)\", etc.",
        "overwrite = false",
        "suffix = false",
        "# Disable external lookups (use filename/LLM only).",
        "# When true, provider selection is ignored.",
        "no_lookup = false",
        "# explain prints top candidate matches when a file is skipped.",
        "explain = false",
        "# min_score is 0-100 (match confidence threshold).",
        "min_score = 80",
        "# include_id adds tmdb-XXXX or imdb-ttXXXX in the filename.",
        "include_id = false",
        "",
        "# Quality tags: list or comma-separated string.",
        "# Supported tags: resolution, codec, source, all, none.",
        "quality_tags = [\"resolution\"]",
        "",
        "# Console colors: auto, always, never",
        "color = \"auto\"",
        "",
        "# Concurrency: auto or a number",
        "# jobs controls file processing threads.",
        "# net_jobs controls concurrent API calls.",
        "jobs = \"auto\"",
        "net_jobs = \"auto\"",
        "",
        "# Optional: override provider base URLs (useful for testing).",
        "# tmdb_base_url = \"https://api.themoviedb.org/3\"",
        "# omdb_base_url = \"https://www.omdbapi.com\"",
        "",
        "[llm]",
        "# LLM usage:",
        "# - off: no LLM usage",
        "# - parse: LLM can replace filename parsing hints",
        "# - assist: LLM adds alternate hints but still verifies via providers",
        "# Ollama expected at endpoint.",
        "mode = \"off\"",
        "endpoint = \"http://localhost:11434\"",
        "model = \"Qwen2.5:latest\"",
        "# For higher accuracy (more RAM/VRAM): \"Qwen2.5:14b\"",
        "# timeout_seconds limits LLM request time.",
        "timeout_seconds = 30",
        "# max_tokens caps response length.",
        "# max_tokens = 256",
        "",
    ]
    .join("\n")
}

fn apply_file_config(settings: &mut Settings, file: &FileConfig) -> Result<()> {
    if let Some(provider) = &file.provider {
        settings.provider = provider.clone();
    }
    if let Some(key) = &file.api_key_omdb {
        settings.api_key_omdb = Some(key.clone());
    }
    if let Some(key) = &file.api_key_tmdb {
        settings.api_key_tmdb = Some(key.clone());
    }
    if let Some(path) = &file.cache_path {
        settings.cache_path = path.clone();
    }
    if let Some(ttl) = file.cache_ttl_days {
        settings.cache_ttl_days = ttl;
    }
    if let Some(refresh) = file.refresh_cache {
        settings.refresh_cache = refresh;
    }
    if let Some(format) = &file.report_format {
        settings.report_format = format.clone();
    }
    if let Some(sidecar_notes) = file.sidecar_notes {
        settings.sidecar_notes = sidecar_notes;
    }
    if let Some(sidecars) = file.sidecars {
        settings.sidecars = sidecars;
    }
    if let Some(dry_run_summary) = file.dry_run_summary {
        settings.dry_run_summary = dry_run_summary;
    }
    if let Some(overwrite) = file.overwrite {
        settings.overwrite = overwrite;
    }
    if let Some(suffix) = file.suffix {
        settings.suffix = suffix;
    }
    if let Some(min_score) = file.min_score {
        settings.min_score = min_score;
    }
    if let Some(include_id) = file.include_id {
        settings.include_id = include_id;
    }
    if let Some(tags) = &file.quality_tags {
        let values = match tags {
            QualityTagsValue::List(list) => list.clone(),
            QualityTagsValue::Single(value) => split_list(value),
        };
        settings.quality_tags = parse_quality_tags(&values)?;
    }
    if let Some(color) = &file.color {
        settings.color = color.clone();
    }
    if let Some(raw) = &file.jobs {
        settings.jobs = parse_jobs_setting_value(raw, default_jobs())?;
    }
    if let Some(raw) = &file.net_jobs {
        settings.net_jobs = parse_jobs_setting_value(raw, default_net_jobs(settings.jobs))?;
    }
    if let Some(no_lookup) = file.no_lookup {
        settings.no_lookup = no_lookup;
    }
    if let Some(explain) = file.explain {
        settings.explain = explain;
    }
    if let Some(llm) = &file.llm {
        apply_file_llm(settings, llm);
    }
    if let Some(url) = &file.omdb_base_url {
        settings.omdb_base_url = url.clone();
    }
    if let Some(url) = &file.tmdb_base_url {
        settings.tmdb_base_url = url.clone();
    }
    Ok(())
}

fn apply_file_llm(settings: &mut Settings, llm: &FileLlmConfig) {
    if let Some(mode) = &llm.mode {
        settings.llm.mode = mode.clone();
    }
    if let Some(endpoint) = &llm.endpoint {
        settings.llm.endpoint = endpoint.clone();
    }
    if let Some(model) = &llm.model {
        settings.llm.model = Some(model.clone());
    }
    if let Some(timeout) = llm.timeout_seconds {
        settings.llm.timeout_seconds = timeout;
    }
    if let Some(max_tokens) = llm.max_tokens {
        settings.llm.max_tokens = Some(max_tokens);
    }
}

fn apply_env_overrides(settings: &mut Settings) -> Result<()> {
    apply_env_string("MOV_RENAMARR_PROVIDER", |value| {
        if let Ok(provider) = ProviderChoice::from_str(&value.to_ascii_lowercase()) {
            settings.provider = provider;
        }
    });

    apply_env_string("MOV_RENAMARR_OMDB_API_KEY", |value| {
        settings.api_key_omdb = Some(value);
    });

    apply_env_string("MOV_RENAMARR_TMDB_API_KEY", |value| {
        settings.api_key_tmdb = Some(value);
    });

    apply_env_string("MOV_RENAMARR_CACHE", |value| {
        settings.cache_path = PathBuf::from(value);
    });

    apply_env_string("MOV_RENAMARR_REPORT_FORMAT", |value| {
        if let Ok(format) = ReportFormat::from_str(&value.to_ascii_lowercase()) {
            settings.report_format = format;
        }
    });

    apply_env_string("MOV_RENAMARR_JOBS", |value| {
        if let Ok(jobs) = parse_jobs_setting(&value, default_jobs()) {
            settings.jobs = jobs;
        }
    });

    apply_env_string("MOV_RENAMARR_NET_JOBS", |value| {
        if let Ok(jobs) = parse_jobs_setting(&value, default_net_jobs(settings.jobs)) {
            settings.net_jobs = jobs;
        }
    });

    apply_env_string("MOV_RENAMARR_MIN_SCORE", |value| {
        if let Ok(min_score) = value.parse::<u8>() {
            settings.min_score = min_score;
        }
    });

    apply_env_bool("MOV_RENAMARR_INCLUDE_ID", |value| settings.include_id = value);
    apply_env_bool("MOV_RENAMARR_SIDECARS", |value| settings.sidecars = value);
    apply_env_bool("MOV_RENAMARR_SIDECAR_NOTES", |value| settings.sidecar_notes = value);
    apply_env_bool("MOV_RENAMARR_DRY_RUN_SUMMARY", |value| settings.dry_run_summary = value);
    apply_env_bool("MOV_RENAMARR_OVERWRITE", |value| settings.overwrite = value);
    apply_env_bool("MOV_RENAMARR_SUFFIX", |value| settings.suffix = value);
    apply_env_bool("MOV_RENAMARR_NO_LOOKUP", |value| settings.no_lookup = value);
    apply_env_bool("MOV_RENAMARR_EXPLAIN", |value| settings.explain = value);

    apply_env_string("MOV_RENAMARR_QUALITY_TAGS", |value| {
        if let Ok(tags) = parse_quality_tags(&split_list(&value)) {
            settings.quality_tags = tags;
        }
    });

    apply_env_string("MOV_RENAMARR_COLOR", |value| {
        if let Ok(mode) = ColorMode::from_str(&value.to_ascii_lowercase()) {
            settings.color = mode;
        }
    });

    apply_env_string("MOV_RENAMARR_LLM_MODE", |value| {
        if let Ok(mode) = LlmMode::from_str(&value.to_ascii_lowercase()) {
            settings.llm.mode = mode;
        }
    });

    apply_env_string("MOV_RENAMARR_LLM_ENDPOINT", |value| settings.llm.endpoint = value);
    apply_env_string("MOV_RENAMARR_LLM_MODEL", |value| settings.llm.model = Some(value));

    apply_env_string("MOV_RENAMARR_LLM_TIMEOUT", |value| {
        if let Ok(timeout) = value.parse::<u64>() {
            settings.llm.timeout_seconds = timeout;
        }
    });

    apply_env_string("MOV_RENAMARR_LLM_MAX_TOKENS", |value| {
        if let Ok(max_tokens) = value.parse::<u32>() {
            settings.llm.max_tokens = Some(max_tokens);
        }
    });

    apply_env_string("MOV_RENAMARR_OMDB_BASE_URL", |value| settings.omdb_base_url = value);
    apply_env_string("MOV_RENAMARR_TMDB_BASE_URL", |value| settings.tmdb_base_url = value);

    Ok(())
}

fn apply_env_string<F: FnMut(String)>(key: &str, mut setter: F) {
    if let Ok(value) = env::var(key) {
        if !value.trim().is_empty() {
            setter(value);
        }
    }
}

fn apply_env_bool<F: FnMut(bool)>(key: &str, mut setter: F) {
    if let Ok(value) = env::var(key) {
        if let Ok(parsed) = parse_bool(&value) {
            setter(parsed);
        }
    }
}

fn parse_bool(value: &str) -> Result<bool> {
    match value.trim().to_ascii_lowercase().as_str() {
        "1" | "true" | "yes" | "on" => Ok(true),
        "0" | "false" | "no" | "off" => Ok(false),
        _ => Err(anyhow!("invalid boolean value: {value}")),
    }
}

fn apply_cli_overrides(settings: &mut Settings, cli: &Cli) -> Result<()> {
    if let Some(provider) = &cli.provider {
        settings.provider = provider.clone();
    }
    if let Some(key) = &cli.api_key_omdb {
        settings.api_key_omdb = Some(key.clone());
    }
    if let Some(key) = &cli.api_key_tmdb {
        settings.api_key_tmdb = Some(key.clone());
    }
    if let Some(path) = &cli.cache {
        settings.cache_path = path.clone();
    }
    if cli.refresh_cache {
        settings.refresh_cache = true;
    }
    if let Some(format) = &cli.report_format {
        settings.report_format = format.clone();
    }
    if cli.sidecar_notes {
        settings.sidecar_notes = true;
    }
    if cli.sidecars {
        settings.sidecars = true;
    }
    if cli.dry_run_summary {
        settings.dry_run_summary = true;
    }
    if cli.overwrite {
        settings.overwrite = true;
    }
    if cli.suffix {
        settings.suffix = true;
    }
    if let Some(min_score) = cli.min_score {
        settings.min_score = min_score;
    }
    if cli.include_id {
        settings.include_id = true;
    }
    if let Some(tags) = &cli.quality_tags {
        settings.quality_tags = parse_quality_tags(&split_list(tags))?;
    }
    if let Some(color) = &cli.color {
        settings.color = color.clone();
    }
    if let Some(jobs) = &cli.jobs {
        settings.jobs = resolve_jobs_arg(jobs, default_jobs());
    }
    if let Some(net_jobs) = &cli.net_jobs {
        settings.net_jobs = resolve_jobs_arg(net_jobs, default_net_jobs(settings.jobs));
    }
    if cli.no_lookup {
        settings.no_lookup = true;
    }
    if cli.explain {
        settings.explain = true;
    }
    if let Some(mode) = &cli.llm_mode {
        settings.llm.mode = mode.clone();
    }
    if let Some(endpoint) = &cli.llm_endpoint {
        settings.llm.endpoint = endpoint.clone();
    }
    if let Some(model) = &cli.llm_model {
        settings.llm.model = Some(model.clone());
    }
    if let Some(timeout) = cli.llm_timeout {
        settings.llm.timeout_seconds = timeout;
    }
    if let Some(max_tokens) = cli.llm_max_tokens {
        settings.llm.max_tokens = Some(max_tokens);
    }
    if cli.verbose {
        settings.verbose = true;
    }
    Ok(())
}

fn validate_settings(settings: &mut Settings) -> Result<()> {
    if settings.overwrite && settings.suffix {
        return Err(anyhow!("--overwrite and --suffix cannot both be set"));
    }
    if settings.min_score > 100 {
        return Err(anyhow!("min-score must be between 0 and 100"));
    }
    if settings.dry_run_summary && !settings.dry_run {
        return Err(anyhow!("--dry-run-summary requires --dry-run"));
    }
    if settings.net_jobs == 0 {
        settings.net_jobs = 1;
    }
    if settings.net_jobs > settings.jobs {
        settings.net_jobs = settings.jobs;
    }
    Ok(())
}

pub fn default_jobs() -> usize {
    let cores = num_cpus::get();
    let half = std::cmp::max(1, cores / 2);
    let limit = std::cmp::min(4, half);
    if limit == 0 { 1 } else { limit }
}

pub fn default_net_jobs(jobs: usize) -> usize {
    std::cmp::max(1, std::cmp::min(2, jobs))
}

pub fn format_settings(settings: &Settings) -> Result<String> {
    let printable = PrintableSettings::from(settings);
    toml::to_string_pretty(&printable).context("failed to serialize settings")
}

impl From<&Settings> for PrintableSettings {
    fn from(settings: &Settings) -> Self {
        Self {
            input: settings.input.display().to_string(),
            output: settings.output.display().to_string(),
            provider: settings.provider.clone(),
            api_key_omdb: settings.api_key_omdb.clone(),
            api_key_tmdb: settings.api_key_tmdb.clone(),
            cache_path: settings.cache_path.display().to_string(),
            cache_ttl_days: settings.cache_ttl_days,
            refresh_cache: settings.refresh_cache,
            report_format: settings.report_format.clone(),
            report_path: settings.report_path.as_ref().map(|p| p.display().to_string()),
            sidecar_notes: settings.sidecar_notes,
            sidecars: settings.sidecars,
            dry_run_summary: settings.dry_run_summary,
            overwrite: settings.overwrite,
            suffix: settings.suffix,
            min_score: settings.min_score,
            include_id: settings.include_id,
            quality_tags: settings.quality_tags.to_list(),
            color: settings.color.clone(),
            jobs: settings.jobs,
            net_jobs: settings.net_jobs,
            no_lookup: settings.no_lookup,
            dry_run: settings.dry_run,
            move_files: settings.move_files,
            rename_in_place: settings.rename_in_place,
            interactive: settings.interactive,
            verbose: settings.verbose,
            explain: settings.explain,
            omdb_base_url: settings.omdb_base_url.clone(),
            tmdb_base_url: settings.tmdb_base_url.clone(),
            llm: PrintableLlm::from(&settings.llm),
        }
    }
}

impl From<&LlmSettings> for PrintableLlm {
    fn from(settings: &LlmSettings) -> Self {
        Self {
            mode: settings.mode.clone(),
            endpoint: settings.endpoint.clone(),
            model: settings.model.clone(),
            timeout_seconds: settings.timeout_seconds,
            max_tokens: settings.max_tokens,
        }
    }
}

fn parse_jobs_setting(raw: &str, fallback: usize) -> Result<usize> {
    if raw.eq_ignore_ascii_case("auto") {
        return Ok(fallback);
    }
    let parsed: usize = raw.parse().context("invalid jobs value")?;
    if parsed == 0 {
        return Err(anyhow!("jobs must be >= 1"));
    }
    Ok(parsed)
}

fn parse_jobs_setting_value(raw: &JobValue, fallback: usize) -> Result<usize> {
    match raw {
        JobValue::String(value) => parse_jobs_setting(value, fallback),
        JobValue::Number(value) => {
            if *value == 0 {
                return Err(anyhow!("jobs must be >= 1"));
            }
            Ok(*value as usize)
        }
    }
}

fn resolve_jobs_arg(arg: &JobsArg, fallback: usize) -> usize {
    match arg {
        JobsArg::Auto => fallback,
        JobsArg::Fixed(value) => *value,
    }
}

fn parse_quality_tags(values: &[String]) -> Result<QualityTags> {
    let mut tags = QualityTags::default();
    tags.resolution = false;
    for value in values {
        let token = value.trim().to_ascii_lowercase();
        match token.as_str() {
            "resolution" => tags.resolution = true,
            "codec" => tags.codec = true,
            "source" => tags.source = true,
            "all" => {
                tags.resolution = true;
                tags.codec = true;
                tags.source = true;
            }
            "none" => {
                tags.resolution = false;
                tags.codec = false;
                tags.source = false;
            }
            _ if token.is_empty() => {}
            _ => return Err(anyhow!("unknown quality tag: {token}")),
        }
    }
    Ok(tags)
}

fn split_list(raw: &str) -> Vec<String> {
    raw.split([',', ';', ' '])
        .filter(|token| !token.trim().is_empty())
        .map(|token| token.trim().to_string())
        .collect()
}

fn resolve_report_path(cli: &Cli) -> Result<Option<PathBuf>> {
    match &cli.report {
        None => Ok(None),
        Some(path) => {
            if path.as_os_str() == "__DEFAULT__" {
                let filename = default_report_filename();
                Ok(Some(PathBuf::from(filename)))
            } else {
                Ok(Some(path.clone()))
            }
        }
    }
}

fn default_report_filename() -> String {
    let now = chrono::Local::now();
    let timestamp = now.format("%Y%m%d-%H%M%S").to_string();
    format!("mov-renamarr-report-{timestamp}.txt")
}

// Needed for ValueEnum parsing from env string
impl FromStr for ProviderChoice {
    type Err = anyhow::Error;

    fn from_str(s: &str) -> Result<Self> {
        match s {
            "auto" => Ok(ProviderChoice::Auto),
            "omdb" => Ok(ProviderChoice::Omdb),
            "tmdb" => Ok(ProviderChoice::Tmdb),
            "both" => Ok(ProviderChoice::Both),
            _ => Err(anyhow!("invalid provider choice")),
        }
    }
}

impl FromStr for ReportFormat {
    type Err = anyhow::Error;

    fn from_str(s: &str) -> Result<Self> {
        match s {
            "text" => Ok(ReportFormat::Text),
            "json" => Ok(ReportFormat::Json),
            "csv" => Ok(ReportFormat::Csv),
            _ => Err(anyhow!("invalid report format")),
        }
    }
}

impl FromStr for ColorMode {
    type Err = anyhow::Error;

    fn from_str(s: &str) -> Result<Self> {
        match s {
            "auto" => Ok(ColorMode::Auto),
            "always" => Ok(ColorMode::Always),
            "never" => Ok(ColorMode::Never),
            _ => Err(anyhow!("invalid color mode")),
        }
    }
}

impl FromStr for LlmMode {
    type Err = anyhow::Error;

    fn from_str(s: &str) -> Result<Self> {
        match s {
            "off" => Ok(LlmMode::Off),
            "parse" => Ok(LlmMode::Parse),
            "assist" => Ok(LlmMode::Assist),
            _ => Err(anyhow!("invalid LLM mode")),
        }
    }
}