//! RED Tests for pmat tdg history command
//!
//! Sprint 65 Phase 3: TDG History Commands

#[cfg(test)]
mod tests {
    use std::path::PathBuf;

    // Helper: Get repository root
    fn get_repo_root() -> PathBuf {
        let manifest_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
        let mut current = manifest_dir.clone();
        loop {
            let git_dir = current.join(".git");
            if git_dir.exists() && git_dir.join("HEAD").exists() {
                return current;
            }
            if !current.pop() {
                return manifest_dir.parent().unwrap().to_path_buf();
            }
        }
    }

    // RED TEST 1: TdgCommand::History variant should exist
    #[test]
    #[should_panic(expected = "not implemented")]
    fn test_tdg_command_history_variant_exists() {
        // Arrange & Act
        // This will fail until we add the History variant to TdgCommand enum
        unimplemented!("Need to add TdgCommand::History variant");

        // Assert
        // Command should compile and be instantiable
    }

    // RED TEST 2: History command should accept --commit flag
    #[test]
    #[should_panic(expected = "not implemented")]
    fn test_history_accepts_commit_flag() {
        // Arrange
        let _repo_path = get_repo_root();

        // Act: pmat tdg history --commit abc123
        unimplemented!("Need to implement --commit flag");

        // Assert
        // Should query TDG record at specific commit
    }

    // RED TEST 3: History command should accept --since flag
    #[test]
    #[should_panic(expected = "not implemented")]
    fn test_history_accepts_since_flag() {
        // Arrange
        let _repo_path = get_repo_root();

        // Act: pmat tdg history --since HEAD~10
        unimplemented!("Need to implement --since flag");

        // Assert
        // Should query TDG records since specific ref
    }

    // RED TEST 4: History command should accept --range flag
    #[test]
    #[should_panic(expected = "not implemented")]
    fn test_history_accepts_range_flag() {
        // Arrange
        let _repo_path = get_repo_root();

        // Act: pmat tdg history --range HEAD~10..HEAD
        unimplemented!("Need to implement --range flag");

        // Assert
        // Should query TDG records in commit range
    }

    // RED TEST 5: History command should support --format flag
    #[test]
    #[should_panic(expected = "not implemented")]
    fn test_history_accepts_format_flag() {
        // Arrange
        let _repo_path = get_repo_root();

        // Act: pmat tdg history --format json
        unimplemented!("Need to implement --format flag for history");

        // Assert
        // Should output in specified format (table, json, markdown)
    }

    // RED TEST 6: History should query storage by commit SHA
    #[test]
    #[should_panic(expected = "not implemented")]
    fn test_history_queries_storage_by_commit() {
        // Arrange
        let _repo_path = get_repo_root();

        // Act: Query storage for specific commit
        unimplemented!("Need to implement TieredStore::get_by_commit()");

        // Assert
        // Should return Option<FullTdgRecord> for commit
    }

    // RED TEST 7: History should handle missing commit gracefully
    #[test]
    #[should_panic(expected = "not implemented")]
    fn test_history_handles_missing_commit() {
        // Arrange
        let _repo_path = get_repo_root();

        // Act: Query for non-existent commit
        unimplemented!("Need to implement graceful error handling");

        // Assert
        // Should return helpful error: "No TDG data found for commit abc123"
    }

    // RED TEST 8: History should display git context in output
    #[test]
    #[should_panic(expected = "not implemented")]
    fn test_history_displays_git_context() {
        // Arrange
        let _repo_path = get_repo_root();

        // Act: Get history output
        unimplemented!("Need to implement git context display");

        // Assert
        // Output should show:
        // - Commit SHA
        // - Branch
        // - Author
        // - TDG Score
        // - Grade
    }

    // RED TEST 9: History with --since should return multiple records
    #[test]
    #[should_panic(expected = "not implemented")]
    fn test_history_since_returns_multiple_records() {
        // Arrange
        let _repo_path = get_repo_root();

        // Act: pmat tdg history --since HEAD~5
        unimplemented!("Need to implement --since query");

        // Assert
        // Should return Vec<FullTdgRecord> for last 5 commits
    }

    // RED TEST 10: History should work with git tags
    #[test]
    #[should_panic(expected = "not implemented")]
    fn test_history_works_with_tags() {
        // Arrange
        let _repo_path = get_repo_root();

        // Act: pmat tdg history --commit v2.177.0
        unimplemented!("Need to implement tag resolution");

        // Assert
        // Should resolve tag to commit SHA and query
    }

    // RED TEST 11: History should show quality trend
    #[test]
    #[should_panic(expected = "not implemented")]
    fn test_history_shows_quality_trend() {
        // Arrange
        let _repo_path = get_repo_root();

        // Act: pmat tdg history --range HEAD~10..HEAD
        unimplemented!("Need to implement trend display");

        // Assert
        // Should show:
        // - Grade progression (e.g., A → B+ → B)
        // - Score deltas
        // - Trend indicator (↑↓→)
    }

    // RED TEST 12: History should support --path filter
    #[test]
    #[should_panic(expected = "not implemented")]
    fn test_history_supports_path_filter() {
        // Arrange
        let _repo_path = get_repo_root();

        // Act: pmat tdg history --path server/src/lib.rs --since HEAD~5
        unimplemented!("Need to implement path filtering");

        // Assert
        // Should only show history for specific file
    }
}
