orch/github/

projects.rs

//! GitHub Projects V2 integration — keeps project board columns in sync with task status.
//!
//! Uses GitHub's Projects V2 GraphQL API via the native `GhHttp` reqwest client.
//! All operations are best-effort: failures are logged but never block task execution.

use crate::backends::Status;
use crate::config;
use crate::github::http::GhHttp;
use std::collections::HashMap;

pub(crate) mod label_status;

/// Project board info returned by list queries.
#[derive(Debug, Clone)]
pub struct ProjectInfo {
    pub id: String,
    pub number: u64,
    pub title: String,
}

/// Keeps a GitHub Projects V2 board in sync with orch task statuses.
///
/// Config keys (in `~/.orch/config.yml`):
/// ```yaml
/// gh:
///   project_id: "PVT_kwHO..."
///   project_status_field_id: "PVTSSF_..."
///   project_status_map:
///     backlog: "option-id-1"
///     in_progress: "option-id-2"
///     review: "option-id-3"
///     done: "option-id-4"
/// ```
pub struct ProjectSync {
    project_id: String,
    status_field_id: String,
    status_map: HashMap<String, String>,
    /// GitHub Projects V2 "Estimate" number field ID (optional — not all projects have one).
    estimate_field_id: Option<String>,
    gh: GhHttp,
}

impl ProjectSync {
    /// Load from config. Returns `None` if project integration is not configured.
    pub fn from_config() -> Option<Self> {
        let project_id = config::get("gh.project_id").ok()?;
        if project_id.is_empty() {
            return None;
        }
        let status_field_id = config::get("gh.project_status_field_id").ok()?;

        let mut status_map = HashMap::new();
        for key in &["backlog", "in_progress", "review", "done"] {
            if let Ok(val) = config::get(&format!("gh.project_status_map.{key}")) {
                status_map.insert(key.to_string(), val);
            }
        }

        // Estimate field ID is optional — not all projects have an Estimate field.
        let estimate_field_id = config::get("gh.project_estimate_field_id")
            .ok()
            .filter(|v| !v.is_empty());

        let gh = match GhHttp::new() {
            Ok(gh) => gh,
            Err(e) => {
                tracing::warn!(error = %e, "project sync disabled: failed to build HTTP client");
                return None;
            }
        };

        Some(Self {
            project_id,
            status_field_id,
            status_map,
            estimate_field_id,
            gh,
        })
    }

    /// Discover the Status field ID and option IDs from a project.
    ///
    /// Queries the project's fields via GraphQL and finds the single-select
    /// "Status" field, returning a `ProjectSync` populated with field/option IDs.
    /// Also discovers the "Estimate" number field if present.
    pub async fn discover_fields(project_id: &str) -> anyhow::Result<Self> {
        let gh = GhHttp::new()?;
        // Fetch all field types so we can find both Status (single-select) and Estimate (number).
        let query = r#"query($projectId: ID!) { node(id: $projectId) { ... on ProjectV2 { fields(first: 100) { nodes { ... on ProjectV2SingleSelectField { id name options { id name } } ... on ProjectV2Field { id name } ... on ProjectV2FieldNumber { id name } } } } } }"#;

        let result = gh
            .graphql_with_vars(query, serde_json::json!({ "projectId": project_id }))
            .await?;

        let fields = result
            .pointer("/data/node/fields/nodes")
            .and_then(|n| n.as_array())
            .ok_or_else(|| anyhow::anyhow!("failed to parse project fields response"))?;

        // Find the "Status" field (case-insensitive single-select).
        let status_field = fields
            .iter()
            .find(|f| {
                f.get("name")
                    .and_then(|n| n.as_str())
                    .map(|n| n.eq_ignore_ascii_case("status"))
                    .unwrap_or(false)
            })
            .ok_or_else(|| anyhow::anyhow!("no 'Status' field found in project"))?;

        let field_id = status_field
            .get("id")
            .and_then(|v| v.as_str())
            .ok_or_else(|| anyhow::anyhow!("Status field missing id"))?
            .to_string();

        let options = status_field
            .get("options")
            .and_then(|o| o.as_array())
            .ok_or_else(|| anyhow::anyhow!("Status field missing options"))?;

        // Map option names to their IDs, normalizing to our column keys.
        let mut status_map = HashMap::new();
        for opt in options {
            let opt_id = opt.get("id").and_then(|v| v.as_str()).unwrap_or("");
            let opt_name = opt.get("name").and_then(|v| v.as_str()).unwrap_or("");
            let lower = opt_name.to_lowercase();

            let key = if lower.contains("backlog") || lower.contains("todo") || lower == "new" {
                "backlog"
            } else if lower.contains("progress") || lower.contains("doing") {
                "in_progress"
            } else if lower.contains("review") {
                "review"
            } else if lower.contains("done") || lower.contains("complete") {
                "done"
            } else {
                continue;
            };

            status_map.insert(key.to_string(), opt_id.to_string());
        }

        // Find the "Estimate" number field (case-insensitive).
        let estimate_field_id = fields
            .iter()
            .find(|f| {
                f.get("name")
                    .and_then(|n| n.as_str())
                    .map(|n| n.eq_ignore_ascii_case("estimate"))
                    .unwrap_or(false)
            })
            .and_then(|f| f.get("id").and_then(|v| v.as_str()))
            .filter(|id| !id.is_empty())
            .map(String::from);

        Ok(Self {
            project_id: project_id.to_string(),
            status_field_id: field_id,
            status_map,
            estimate_field_id,
            gh,
        })
    }

    /// List all accessible projects for the authenticated user and their orgs.
    pub async fn list_projects() -> anyhow::Result<Vec<ProjectInfo>> {
        let gh = GhHttp::new()?;
        let mut projects = Vec::new();

        // Get current user login
        let user = gh.get_whoami().await?;

        // User projects
        let query = r#"query($login: String!) { user(login: $login) { projectsV2(first: 100) { nodes { id number title } } } }"#;
        if let Ok(result) = gh
            .graphql_with_vars(query, serde_json::json!({ "login": user }))
            .await
        {
            if let Some(nodes) = result
                .pointer("/data/user/projectsV2/nodes")
                .and_then(|n| n.as_array())
            {
                for node in nodes {
                    if let Some(info) = parse_project_node(node) {
                        projects.push(info);
                    }
                }
            }
        }

        // Try org projects for the repo owner (if different from user)
        if let Ok(repo) = config::get_current_repo() {
            if let Some(owner) = repo.split('/').next() {
                if owner != user {
                    let query = r#"query($login: String!) { organization(login: $login) { projectsV2(first: 100) { nodes { id number title } } } }"#;
                    if let Ok(result) = gh
                        .graphql_with_vars(query, serde_json::json!({ "login": owner }))
                        .await
                    {
                        if let Some(nodes) = result
                            .pointer("/data/organization/projectsV2/nodes")
                            .and_then(|n| n.as_array())
                        {
                            for node in nodes {
                                if let Some(info) = parse_project_node(node) {
                                    projects.push(info);
                                }
                            }
                        }
                    }
                }
            }
        }

        Ok(projects)
    }

    /// Add an issue to the project board. Returns the project item ID.
    pub async fn add_item(&self, issue_node_id: &str) -> anyhow::Result<String> {
        let query = r#"mutation($projectId: ID!, $contentId: ID!) { addProjectV2ItemById(input: { projectId: $projectId, contentId: $contentId }) { item { id } } }"#;

        let result = self
            .gh
            .graphql_with_vars(
                query,
                serde_json::json!({
                    "projectId": self.project_id,
                    "contentId": issue_node_id,
                }),
            )
            .await?;
        result
            .pointer("/data/addProjectV2ItemById/item/id")
            .and_then(|v| v.as_str())
            .map(String::from)
            .ok_or_else(|| anyhow::anyhow!("failed to add item to project"))
    }

    /// Update an item's status column on the project board.
    pub async fn update_item_status(&self, item_id: &str, status: &Status) -> anyhow::Result<()> {
        let column = Self::status_to_column(status);
        let option_id = self
            .status_map
            .get(column)
            .ok_or_else(|| anyhow::anyhow!("no option ID for column: {column}"))?;

        let query = r#"mutation($projectId: ID!, $itemId: ID!, $fieldId: ID!, $optionId: String!) { updateProjectV2ItemFieldValue(input: { projectId: $projectId, itemId: $itemId, fieldId: $fieldId, value: { singleSelectOptionId: $optionId } }) { projectV2Item { id } } }"#;

        self.gh
            .graphql_with_vars(
                query,
                serde_json::json!({
                    "projectId": self.project_id,
                    "itemId": item_id,
                    "fieldId": self.status_field_id,
                    "optionId": option_id,
                }),
            )
            .await?;
        Ok(())
    }

    /// Sync an issue's project board status: add to project if needed, then update column.
    ///
    /// This is the main entry point called from `update_status()`.
    pub async fn sync_item_status(
        &self,
        issue_node_id: &str,
        status: &Status,
    ) -> anyhow::Result<()> {
        // Add item to project (idempotent — returns existing item if already added)
        let item_id = self.add_item(issue_node_id).await?;

        // Update the status column
        self.update_item_status(&item_id, status).await
    }

    /// Map orch `Status` to a project board column key.
    pub fn status_to_column(status: &Status) -> &'static str {
        match status {
            Status::New | Status::Routed | Status::Waiting => "backlog",
            Status::InProgress | Status::Blocked => "in_progress",
            Status::InReview | Status::NeedsReview => "review",
            Status::Done => "done",
        }
    }

    /// Get the status field ID.
    pub fn status_field_id(&self) -> &str {
        &self.status_field_id
    }

    /// Get the status map (column key → option ID).
    pub fn status_map(&self) -> &HashMap<String, String> {
        &self.status_map
    }

    /// Get the estimate field ID, if configured.
    pub fn estimate_field_id(&self) -> Option<&str> {
        self.estimate_field_id.as_deref()
    }

    /// Get the project ID.
    pub fn project_id(&self) -> &str {
        &self.project_id
    }

    /// Update an item's Estimate number field on the project board.
    ///
    /// Returns the project item ID (either found or newly added).
    pub async fn sync_item_estimate(
        &self,
        issue_node_id: &str,
        estimate: u8,
    ) -> anyhow::Result<String> {
        let Some(field_id) = &self.estimate_field_id else {
            return Err(anyhow::anyhow!("estimate field not configured"));
        };

        // Add item to project (idempotent — returns existing item if already added).
        let item_id = self.add_item(issue_node_id).await?;

        // Update the estimate number field.
        let query = r#"mutation($projectId: ID!, $itemId: ID!, $fieldId: ID!, $value: Float!) { updateProjectV2ItemFieldValue(input: { projectId: $projectId, itemId: $itemId, fieldId: $fieldId, value: { number: $value } }) { projectV2Item { id } } }"#;

        self.gh
            .graphql_with_vars(
                query,
                serde_json::json!({
                    "projectId": self.project_id,
                    "itemId": item_id,
                    "fieldId": field_id,
                    "value": f64::from(estimate),
                }),
            )
            .await?;

        Ok(item_id)
    }

    /// Batch-fetch estimate values for multiple project items by their content (issue) node IDs.
    ///
    /// Returns a map from content node ID → estimate value (0 if not set or field absent).
    /// Only queries the estimate field — the result is used to populate orch's estimate
    /// during task ingestion when `tasks.estimate` is still 0.
    ///
    /// GitHub's GraphQL API doesn't support querying items by arbitrary node IDs directly,
    /// so we fetch all project items and their field values, then match by content ID.
    /// This is acceptable for projects with reasonable item counts (< 1000).
    pub async fn get_estimates_for_issues(
        &self,
        issue_node_ids: &[String],
    ) -> anyhow::Result<std::collections::HashMap<String, u8>> {
        let Some(field_id) = &self.estimate_field_id else {
            return Ok(std::collections::HashMap::new());
        };

        let issue_set: std::collections::HashSet<&str> =
            issue_node_ids.iter().map(|s| s.as_str()).collect();

        // Fetch all items in the project with their fieldValues filtered to the estimate field.
        let query = r#"query($projectId: ID!) { node(id: $projectId) { ... on ProjectV2 { items(first: 100) { nodes { id content { ... on Issue { id } ... on PullRequest { id } } fieldValues(first: 10) { nodes { ... on ProjectV2ItemFieldNumberValue { field { id } number } } } } } } } }"#;

        let result = self
            .gh
            .graphql_with_vars(query, serde_json::json!({ "projectId": self.project_id }))
            .await?;

        let items = result
            .pointer("/data/node/items/nodes")
            .and_then(|n| n.as_array())
            .ok_or_else(|| anyhow::anyhow!("failed to parse project items"))?;

        let mut estimates = std::collections::HashMap::new();

        for item in items {
            // Extract the content node ID (issue or PR).
            let content = match item.get("content") {
                Some(c) => c,
                None => continue, // Item has no content (e.g. draft).
            };
            let content_id = match content.get("id").and_then(|v| v.as_str()) {
                Some(id) => id,
                None => continue,
            };

            // Skip if this content ID is not in our target set.
            if !issue_set.contains(content_id) {
                continue;
            }

            // Find the estimate field value.
            let field_values = match item
                .get("fieldValues")
                .and_then(|fv| fv.get("nodes"))
                .and_then(|n| n.as_array())
            {
                Some(fv) => fv,
                None => continue,
            };
            let estimate = field_values
                .iter()
                .find(|fv| {
                    fv.get("field")
                        .and_then(|f| f.get("id"))
                        .and_then(|id| id.as_str())
                        .is_some_and(|id| id == field_id)
                })
                .and_then(|fv| fv.get("number"))
                .and_then(|n| n.as_f64())
                .unwrap_or(0.0) as u8;

            // Only accept Fibonacci values (0 = not set, or 1/2/3/5/8/13/21).
            const FIBONACCI: &[u8] = &[0, 1, 2, 3, 5, 8, 13, 21];
            if FIBONACCI.contains(&estimate) {
                estimates.insert(content_id.to_string(), estimate);
            }
        }

        Ok(estimates)
    }
}

/// Parse a project node from GraphQL response.
fn parse_project_node(node: &serde_json::Value) -> Option<ProjectInfo> {
    Some(ProjectInfo {
        id: node.get("id")?.as_str()?.to_string(),
        number: node.get("number")?.as_u64()?,
        title: node.get("title")?.as_str()?.to_string(),
    })
}

/// Write project config fields to `~/.orch/config.yml`.
pub async fn write_project_config(sync: &ProjectSync) -> anyhow::Result<()> {
    let config_path = crate::home::config_path()?;
    let content = if config_path.exists() {
        tokio::fs::read_to_string(&config_path).await?
    } else {
        String::new()
    };

    // Parse existing YAML or start fresh
    let mut doc: serde_norway::Value = if content.is_empty() {
        serde_norway::Value::Mapping(serde_norway::Mapping::new())
    } else {
        serde_norway::from_str(&content)?
    };

    let root = doc
        .as_mapping_mut()
        .ok_or_else(|| anyhow::anyhow!("config is not a YAML mapping"))?;

    // Ensure gh section exists
    let gh_key = serde_norway::Value::String("gh".to_string());
    if !root.contains_key(&gh_key) {
        root.insert(
            gh_key.clone(),
            serde_norway::Value::Mapping(serde_norway::Mapping::new()),
        );
    }
    let gh = root
        .get_mut(&gh_key)
        .and_then(|v| v.as_mapping_mut())
        .ok_or_else(|| anyhow::anyhow!("gh config is not a mapping"))?;

    // Set project fields
    gh.insert(
        serde_norway::Value::String("project_id".to_string()),
        serde_norway::Value::String(sync.project_id.clone()),
    );
    gh.insert(
        serde_norway::Value::String("project_status_field_id".to_string()),
        serde_norway::Value::String(sync.status_field_id.clone()),
    );

    // Build status map
    let mut map = serde_norway::Mapping::new();
    for (key, val) in &sync.status_map {
        map.insert(
            serde_norway::Value::String(key.clone()),
            serde_norway::Value::String(val.clone()),
        );
    }
    gh.insert(
        serde_norway::Value::String("project_status_map".to_string()),
        serde_norway::Value::Mapping(map),
    );

    // Persist the estimate field ID (optional — not all projects have one).
    if let Some(ref field_id) = sync.estimate_field_id {
        gh.insert(
            serde_norway::Value::String("project_estimate_field_id".to_string()),
            serde_norway::Value::String(field_id.clone()),
        );
    }

    tokio::fs::write(&config_path, serde_norway::to_string(&doc)?).await?;
    Ok(())
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::backends::Status;

    #[test]
    fn status_to_column_mapping() {
        assert_eq!(ProjectSync::status_to_column(&Status::New), "backlog");
        assert_eq!(ProjectSync::status_to_column(&Status::Routed), "backlog");
        assert_eq!(
            ProjectSync::status_to_column(&Status::InProgress),
            "in_progress"
        );
        assert_eq!(
            ProjectSync::status_to_column(&Status::Blocked),
            "in_progress"
        );
        assert_eq!(ProjectSync::status_to_column(&Status::InReview), "review");
        assert_eq!(
            ProjectSync::status_to_column(&Status::NeedsReview),
            "review"
        );
        assert_eq!(ProjectSync::status_to_column(&Status::Done), "done");
    }

    #[test]
    fn parse_project_node_valid() {
        let node = serde_json::json!({
            "id": "PVT_kwHOA123",
            "number": 42,
            "title": "My Project"
        });
        let info = parse_project_node(&node).unwrap();
        assert_eq!(info.id, "PVT_kwHOA123");
        assert_eq!(info.number, 42);
        assert_eq!(info.title, "My Project");
    }

    #[test]
    fn parse_project_node_missing_field() {
        let node = serde_json::json!({ "id": "PVT_kwHOA123" });
        assert!(parse_project_node(&node).is_none());
    }

    #[test]
    fn from_config_returns_none_when_not_configured() {
        // Isolate from both the repo's .orch.yml and the global ~/.orch/config.yml:
        // 1. Change to a temp dir so project config lookup finds no .orch.yml
        // 2. Point ORCH_HOME at a separate temp dir so the global config is not found
        // 3. Clear the config cache so no previously-cached values are reused
        let original_cwd = std::env::current_dir().unwrap();
        let prev_orch_home = std::env::var("ORCH_HOME").ok();

        let temp_cwd = tempfile::tempdir().unwrap();
        let temp_orch_home = tempfile::tempdir().unwrap();
        let orch_dir = temp_orch_home.path().join(".orch");
        std::fs::create_dir_all(&orch_dir).unwrap();

        std::env::set_current_dir(temp_cwd.path()).unwrap();
        std::env::set_var("ORCH_HOME", &orch_dir);
        config::clear_test_cache();

        let result = std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| {
            assert!(ProjectSync::from_config().is_none());
        }));

        std::env::set_current_dir(&original_cwd).unwrap();
        if let Some(prev) = prev_orch_home {
            std::env::set_var("ORCH_HOME", prev);
        } else {
            std::env::remove_var("ORCH_HOME");
        }
        result.unwrap();
    }

    #[test]
    fn get_estimates_filters_non_fibonacci_values() {
        // The get_estimates_for_issues function should only accept Fibonacci values.
        // Non-Fibonacci values should be silently dropped.
        // We test this by verifying the parsing logic directly.
        const FIBONACCI: &[u8] = &[0, 1, 2, 3, 5, 8, 13, 21];

        // Fibonacci values should be accepted
        for &v in FIBONACCI {
            assert!(
                FIBONACCI.contains(&v),
                "Fibonacci value {v} should be accepted"
            );
        }

        // Non-Fibonacci values should NOT be in the list
        let non_fib = [4, 6, 7, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 22];
        for &v in &non_fib {
            assert!(
                !FIBONACCI.contains(&v),
                "Non-Fibonacci value {v} should NOT be accepted"
            );
        }
    }

    #[test]
    fn estimate_field_id_is_optional() {
        // ProjectSync should be constructable with no estimate field.
        // estimate_field_id() should return None when not configured.
        let original_cwd = std::env::current_dir().unwrap();
        let prev_orch_home = std::env::var("ORCH_HOME").ok();

        let temp_cwd = tempfile::tempdir().unwrap();
        let temp_orch_home = tempfile::tempdir().unwrap();
        let orch_dir = temp_orch_home.path().join(".orch");
        std::fs::create_dir_all(&orch_dir).unwrap();

        std::env::set_current_dir(temp_cwd.path()).unwrap();
        std::env::set_var("ORCH_HOME", &orch_dir);
        config::clear_test_cache();

        // Write a config with project ID and status field but NO estimate field.
        let config_path = orch_dir.join("config.yml");
        std::fs::write(
            &config_path,
            r#"
gh:
  project_id: "PVT_kwHOAB123"
  project_status_field_id: "PVTSSF_123"
  project_status_map:
    backlog: "opt1"
"#,
        )
        .unwrap();

        let result = std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| {
            let sync = ProjectSync::from_config();
            assert!(
                sync.is_some(),
                "should be Some when project_id is configured"
            );
            assert_eq!(
                sync.unwrap().estimate_field_id(),
                None,
                "estimate_field_id should be None when not configured"
            );
        }));

        std::env::set_current_dir(&original_cwd).unwrap();
        if let Some(prev) = prev_orch_home {
            std::env::set_var("ORCH_HOME", prev);
        } else {
            std::env::remove_var("ORCH_HOME");
        }
        result.unwrap();
    }
}