"""Main ingestion script. Clone repo, parse, generate docs, load SQLite."""

import os
import subprocess
import time
import json
from pathlib import Path

from parser import parse_go_file, filter_imports, get_repo_module, resolve_import_to_file
from docgen import generate_file_doc, generate_repo_doc, generate_docs_batch
from db import GraphDB

TARGET_REPO = os.environ.get("TARGET_REPO", "https://github.com/labstack/echo.git")
REPO_DIR = os.environ.get("REPO_DIR", os.path.join(os.path.dirname(__file__), "repos", "target"))


def clone_repo():
    if Path(REPO_DIR).exists() and (Path(REPO_DIR) / ".git").exists():
        print(f"Repo already cloned at {REPO_DIR}, pulling latest...")
        subprocess.run(["git", "-C", REPO_DIR, "pull"], check=True)
    else:
        print(f"Cloning {TARGET_REPO}...")
        Path(REPO_DIR).parent.mkdir(parents=True, exist_ok=True)
        subprocess.run(["git", "clone", "--depth=1", TARGET_REPO, REPO_DIR], check=True)

    result = subprocess.run(
        ["git", "-C", REPO_DIR, "rev-parse", "HEAD"],
        capture_output=True, text=True, check=True,
    )
    return result.stdout.strip()


def discover_go_files() -> dict[str, str]:
    files = {}
    repo = Path(REPO_DIR)
    for gofile in repo.rglob("*.go"):
        rel = str(gofile.relative_to(repo))
        if "vendor/" in rel or "_test.go" in rel:
            continue
        try:
            files[rel] = gofile.read_text(errors="replace")
        except Exception as e:
            print(f"  Skipping {rel}: {e}")
    return files


def run():
    start = time.time()
    print("=" * 60)
    print("Developer Intelligence POC — Ingestion")
    print("=" * 60)

    # Step 1: Clone
    print("\n[1/6] Cloning repository...")
    commit = clone_repo()
    repo_name = TARGET_REPO.rstrip("/").split("/")[-1].replace(".git", "")
    print(f"  Repo: {repo_name}, commit: {commit[:8]}")

    # Step 2: Discover files
    print("\n[2/6] Discovering Go files...")
    go_files = discover_go_files()
    print(f"  Found {len(go_files)} Go files (excluding tests and vendor)")

    # Step 3: Parse AST
    print("\n[3/6] Parsing AST (tree-sitter)...")
    repo_module = get_repo_module(REPO_DIR)
    print(f"  Module: {repo_module}")

    parsed = {}
    all_imports = {}
    for rel_path, content in go_files.items():
        info = parse_go_file(rel_path, content, repo_module)
        parsed[rel_path] = info
        filtered = filter_imports(info.imports, repo_module)
        all_imports[rel_path] = filtered

    total_imports = sum(len(v) for v in all_imports.values())
    first_party = sum(1 for v in all_imports.values() for i in v if i.startswith(repo_module))
    print(f"  Parsed {len(parsed)} files, {total_imports} filtered imports ({first_party} first-party)")

    # Step 4: Generate file docs
    print("\n[4/6] Generating file documentation (Ollama)...")
    file_items = [(path, content) for path, content in go_files.items()]
    file_docs = generate_docs_batch(file_items, generate_file_doc)
    file_doc_map = {file_items[i][0]: file_docs[i] for i in range(len(file_items))}

    # Step 5: Load into SQLite
    print("\n[5/6] Loading into database...")
    db = GraphDB()

    for rel_path, content in go_files.items():
        info = parsed[rel_path]
        doc = file_doc_map.get(rel_path, "")
        db.create_file(
            path=rel_path,
            repo=repo_name,
            language="go",
            documentation=doc,
            functions=info.functions,
            commit=commit[:8],
        )

    edges_created = 0
    for from_file, imports in all_imports.items():
        for imp in imports:
            if not imp.startswith(repo_module):
                continue
            target_dir = resolve_import_to_file(imp, repo_module, go_files)
            if target_dir:
                # Find actual files in that directory
                for fpath in go_files:
                    fdir = str(Path(fpath).parent)
                    if fdir == target_dir or fdir.endswith("/" + target_dir):
                        db.create_relationship(from_file, fpath)
                        edges_created += 1

    print(f"  Created {len(go_files)} file nodes, {edges_created} import edges")

    # Step 6: Generate repo-level doc
    print("\n[6/6] Generating repo-level documentation...")
    readme_path = Path(REPO_DIR) / "README.md"
    readme = readme_path.read_text(errors="replace") if readme_path.exists() else ""

    entry_candidates = ["echo.go", "router.go", "context.go", "group.go", "middleware.go"]
    entry_files = []
    for candidate in entry_candidates:
        for path, content in go_files.items():
            if path.endswith(candidate):
                entry_files.append((path, content))
                break

    repo_doc = generate_repo_doc(readme, entry_files)
    db.create_repo(name=repo_name, url=TARGET_REPO, language="go", documentation=repo_doc)

    stats = db.get_stats()
    elapsed = time.time() - start
    print("\n" + "=" * 60)
    print("Ingestion complete!")
    print(f"  Files:         {stats['files']}")
    print(f"  Relationships: {stats['relationships']}")
    print(f"  Time:          {elapsed:.1f}s ({elapsed/60:.1f}m)")
    print(f"  Database:      {os.path.abspath(db.conn.execute('PRAGMA database_list').fetchone()[2])}")
    print("=" * 60)

    db.close()


if __name__ == "__main__":
    run()