use codex_protocol::parse_command::ParsedCommand;
use codex_shell_command::is_safe_command::is_known_safe_command;
use codex_shell_command::parse_command::parse_command;

pub use crate::metrics::MEMORIES_USAGE_METRIC;

#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
pub enum MemoriesUsageKind {
    MemoryMd,
    MemorySummary,
    RawMemories,
    RolloutSummaries,
    Skills,
}

impl MemoriesUsageKind {
    pub fn as_tag(self) -> &'static str {
        match self {
            Self::MemoryMd => "memory_md",
            Self::MemorySummary => "memory_summary",
            Self::RawMemories => "raw_memories",
            Self::RolloutSummaries => "rollout_summaries",
            Self::Skills => "skills",
        }
    }
}

pub fn memories_usage_kinds_from_command(command: &[String]) -> Vec<MemoriesUsageKind> {
    if !is_known_safe_command(command) {
        return Vec::new();
    }

    parse_command(command)
        .into_iter()
        .filter_map(|command| match command {
            ParsedCommand::Read { path, .. } => get_memory_kind(path.display().to_string()),
            ParsedCommand::Search { path, .. } => path.and_then(get_memory_kind),
            ParsedCommand::ListFiles { .. } | ParsedCommand::Unknown { .. } => None,
        })
        .collect()
}

fn get_memory_kind(path: String) -> Option<MemoriesUsageKind> {
    if path.contains("memories/MEMORY.md") {
        Some(MemoriesUsageKind::MemoryMd)
    } else if path.contains("memories/memory_summary.md") {
        Some(MemoriesUsageKind::MemorySummary)
    } else if path.contains("memories/raw_memories.md") {
        Some(MemoriesUsageKind::RawMemories)
    } else if path.contains("memories/rollout_summaries/") {
        Some(MemoriesUsageKind::RolloutSummaries)
    } else if path.contains("memories/skills/") {
        Some(MemoriesUsageKind::Skills)
    } else {
        None
    }
}