// Package vcs defines the shared VCS client interface and supporting types.
// Platform adapters (gitea, github) implement these interfaces so the core
// review logic can work with any VCS platform without platform-specific code.
package vcs

import "context"

// PRReader can fetch pull request metadata, diffs, and changed files.
type PRReader interface {
	GetPullRequest(ctx context.Context, owner, repo string, number int) (*PullRequest, error)
	GetPullRequestDiff(ctx context.Context, owner, repo string, number int) (string, error)
	GetPullRequestFiles(ctx context.Context, owner, repo string, number int) ([]ChangedFile, error)
}

// FileReader can fetch file contents and list directory entries.
type FileReader interface {
	GetFileContent(ctx context.Context, owner, repo, path, ref string) (string, error)
	ListContents(ctx context.Context, owner, repo, path string) ([]ContentEntry, error)
}

// Reviewer can post, list, and delete pull request reviews.
type Reviewer interface {
	PostReview(ctx context.Context, owner, repo string, number int, req ReviewRequest) (*Review, error)
	ListReviews(ctx context.Context, owner, repo string, number int) ([]Review, error)
	DeleteReview(ctx context.Context, owner, repo string, number int, reviewID int64) error
}

// Identity can report who the authenticated user is.
type Identity interface {
	GetAuthenticatedUser(ctx context.Context) (string, error)
}

// Client is the full VCS interface: PR reads, file reads, review management, and identity.
// Platform adapters (gitea, github) implement this interface.
type Client interface {
	PRReader
	FileReader
	Reviewer
	Identity
}