use serde::{Deserialize, Serialize};

#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
#[serde(rename_all = "snake_case")]
pub enum ContentType {
    Movie,
    Episode,
    Short,
}

#[derive(Debug, Clone, Default, Serialize, Deserialize)]
pub struct MediaFilter {
    pub content_type: Option<ContentType>,
    pub genres: Vec<String>,
    pub decade: Option<u16>,
    pub tags: Vec<String>,
    pub min_duration_secs: Option<u32>,
    pub max_duration_secs: Option<u32>,
    pub collections: Vec<String>,
    #[serde(default)]
    pub series_names: Vec<String>,
    pub search_term: Option<String>,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(rename_all = "snake_case")]
pub enum FillStrategy {
    BestFit,
    Sequential,
    Random,
    Alternating,
    Weighted,
    Marathon,
}

const DEFAULT_COOLDOWN_DAYS: u32 = 30;
const DEFAULT_MIN_AVAILABLE_RATIO: f32 = 0.2;

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct RotationPolicy {
    pub cooldown_days: Option<u32>,
    pub cooldown_generations: Option<u32>,
    pub min_available_ratio: f32,
}

impl Default for RotationPolicy {
    fn default() -> Self {
        Self {
            cooldown_days: Some(DEFAULT_COOLDOWN_DAYS),
            cooldown_generations: None,
            min_available_ratio: DEFAULT_MIN_AVAILABLE_RATIO,
        }
    }
}

#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize)]
#[serde(rename_all = "lowercase")]
pub enum Weekday {
    Monday,
    Tuesday,
    Wednesday,
    Thursday,
    Friday,
    Saturday,
    Sunday,
}

impl From<chrono::Weekday> for Weekday {
    fn from(w: chrono::Weekday) -> Self {
        match w {
            chrono::Weekday::Mon => Weekday::Monday,
            chrono::Weekday::Tue => Weekday::Tuesday,
            chrono::Weekday::Wed => Weekday::Wednesday,
            chrono::Weekday::Thu => Weekday::Thursday,
            chrono::Weekday::Fri => Weekday::Friday,
            chrono::Weekday::Sat => Weekday::Saturday,
            chrono::Weekday::Sun => Weekday::Sunday,
        }
    }
}

impl Weekday {
    pub fn all() -> [Weekday; 7] {
        // ISO week order: Monday first. Schedule engine depends on this ordering.
        [
            Weekday::Monday,
            Weekday::Tuesday,
            Weekday::Wednesday,
            Weekday::Thursday,
            Weekday::Friday,
            Weekday::Saturday,
            Weekday::Sunday,
        ]
    }
}

#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize, Default)]
#[serde(rename_all = "snake_case")]
pub enum MediaRole {
    #[default]
    Program,
    Interstitial,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct InterstitialRule {
    pool_filter: MediaFilter,
    strategy: FillStrategy,
    min_gap_secs: u32,
}

impl InterstitialRule {
    pub fn new(pool_filter: MediaFilter, strategy: FillStrategy, min_gap_secs: u32) -> Self {
        Self {
            pool_filter,
            strategy,
            min_gap_secs,
        }
    }

    pub fn pool_filter(&self) -> &MediaFilter {
        &self.pool_filter
    }

    pub fn strategy(&self) -> &FillStrategy {
        &self.strategy
    }

    pub fn min_gap_secs(&self) -> u32 {
        self.min_gap_secs
    }
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct MidRollRule {
    prefer_chapters: bool,
    fallback_interval_mins: u32,
    break_duration_secs: u32,
    pool_filter: MediaFilter,
}

impl MidRollRule {
    pub fn new(
        prefer_chapters: bool,
        fallback_interval_mins: u32,
        break_duration_secs: u32,
        pool_filter: MediaFilter,
    ) -> Self {
        Self {
            prefer_chapters,
            fallback_interval_mins,
            break_duration_secs,
            pool_filter,
        }
    }

    pub fn prefer_chapters(&self) -> bool {
        self.prefer_chapters
    }

    pub fn fallback_interval_mins(&self) -> u32 {
        self.fallback_interval_mins
    }

    pub fn break_duration_secs(&self) -> u32 {
        self.break_duration_secs
    }

    pub fn pool_filter(&self) -> &MediaFilter {
        &self.pool_filter
    }
}

#[cfg(test)]
#[path = "tests/scheduling.rs"]
mod tests;