#!/bin/bash

# Script to handle issue automation with Claude Code
# This script is called when an issue is opened or commented on

# Ensure HOME is set (systemd might not set it)
if [ -z "$HOME" ]; then
    export HOME=$(getent passwd "$(whoami)" | cut -d: -f6)
fi

# Add claude binary to PATH
export PATH="$HOME/.local/bin:$PATH"

# Ensure Claude Code has writable directories for cache and config
export XDG_CACHE_HOME="${XDG_CACHE_HOME:-$HOME/.cache}"
export XDG_CONFIG_HOME="${XDG_CONFIG_HOME:-$HOME/.config}"
export XDG_DATA_HOME="${XDG_DATA_HOME:-$HOME/.local/share}"
export XDG_STATE_HOME="${XDG_STATE_HOME:-$HOME/.local/state}"

# Create these directories if they don't exist
mkdir -p "$XDG_CACHE_HOME" "$XDG_CONFIG_HOME" "$XDG_DATA_HOME" "$XDG_STATE_HOME"

# Parse arguments
OWNER="$1"
REPO="$2"
PUSHER="$3"
ISSUE_NUMBER="$4"
ISSUE_TITLE="$5"
ISSUE_BODY="$6"
ISSUE_ACTION="$7"
COMMENT_BODY="$8"
ASSIGNEE="$9"

# Exit if pusher is claude (avoid loops)
if [ "$PUSHER" = "claude" ]; then
    echo "Pusher is claude, skipping automation to avoid loops"
    exit 0
fi

# Exit if issue is not assigned to claude
if [ "$ASSIGNEE" != "claude" ]; then
    echo "Issue not assigned to claude (assignee: $ASSIGNEE), skipping"
    exit 0
fi

# Determine repo path
REPO_PATH="$HOME/$REPO"

# Check if repo exists, if not clone it
if [ ! -d "$REPO_PATH" ]; then
    echo "Repository not found at $REPO_PATH, cloning..."
    mkdir -p "$HOME"
    GIT_URL="ssh://git@207.154.220.231:10022/$OWNER/$REPO.git"
    git clone "$GIT_URL" "$REPO_PATH"

    if [ $? -ne 0 ]; then
        echo "Failed to clone repository"
        exit 1
    fi
    echo "Repository cloned successfully"
else
    echo "Repository found at $REPO_PATH"
    # Pull latest changes
    cd "$REPO_PATH" || exit 1
    echo "Pulling latest changes..."
    # Try to pull, but don't fail if it errors (might be file system issues)
    if ! git pull 2>&1; then
        echo "Warning: git pull failed, continuing with existing repository state"
    fi
fi

# Change to repo directory
cd "$REPO_PATH" || exit 1
echo "Working directory: $(pwd)"

# Load .env file to get GOGS_MCP_PATH
if [ -f "$REPO_PATH/.env" ]; then
    export $(grep -v '^#' "$REPO_PATH/.env" | grep GOGS_MCP_PATH | xargs)
fi

# Set default GOGS_MCP_PATH if not set
GOGS_MCP_PATH="${GOGS_MCP_PATH:-/data/gogs-mcp/dist/index.js}"

# Generate MCP config file dynamically with environment-specific path
cat > "$REPO_PATH/.mcp-gogs.json" <<EOF
{
  "mcpServers": {
    "gogs": {
      "type": "stdio",
      "command": "node",
      "args": [
        "$GOGS_MCP_PATH"
      ],
      "env": {}
    }
  }
}
EOF

echo "Generated MCP config with path: $GOGS_MCP_PATH"

# Build the prompt for Claude with instructions to use Gogs MCP tool
if [ -n "$COMMENT_BODY" ]; then
    # Issue comment event - new comment was added
    PROMPT="IMPORTANT: A new comment has been added to issue #$ISSUE_NUMBER in repository $OWNER/$REPO.

=== MANDATORY FIRST STEPS - READ ALL MESSAGES ===

Before you start any work on this issue, you MUST complete these steps IN ORDER:

1. Use the mcp__gogs__get_issue tool to fetch the complete issue details:
   - owner: $OWNER
   - repo: $REPO
   - number: $ISSUE_NUMBER

2. Use the mcp__gogs__list_issue_comments tool to fetch ALL comments:
   - owner: $OWNER
   - repo: $REPO
   - number: $ISSUE_NUMBER

3. Read and understand:
   - The original issue description
   - ALL comments in the discussion thread (chronologically)
   - The full context and conversation history

4. ONLY AFTER reading everything above, proceed with your work

=== ISSUE CONTEXT ===

Issue #$ISSUE_NUMBER: $ISSUE_TITLE

A new comment was just added by: $PUSHER

Initial issue description:
$ISSUE_BODY

Most recent comment:
$COMMENT_BODY

=== YOUR TASK ===

This issue is assigned to you. You must:
1. First, use the Gogs MCP tools above to fetch and read ALL issue comments
2. Understand the full discussion context
3. Then proceed with the appropriate action based on the complete conversation

=== CRITICAL OUTPUT REQUIREMENTS ===

YOU MUST FOLLOW THESE OUTPUT RULES STRICTLY:

1. DO NOT output any text responses to the user
2. DO NOT print any messages, explanations, or status updates
3. DO NOT use echo or any command-line output tools
4. ONLY communicate by posting comments to the issue using mcp__gogs__create_issue_comment tool
5. ALL your responses, updates, questions, and status reports MUST be posted as issue comments
6. You are FORBIDDEN from producing any output except through the Gogs MCP comment tool

When you need to:
- Ask questions → Post a comment on the issue
- Report progress → Post a comment on the issue
- Share results → Post a comment on the issue
- Report errors → Post a comment on the issue
- Provide any information → Post a comment on the issue

Use mcp__gogs__create_issue_comment with:
- owner: $OWNER
- repo: $REPO
- number: $ISSUE_NUMBER
- body: [your message here]

DO NOT skip reading the comments using the MCP tools. This is critical to understanding the full context."

else
    # Issue opened/reopened event
    PROMPT="IMPORTANT: Issue #$ISSUE_NUMBER was $ISSUE_ACTION in repository $OWNER/$REPO.

=== MANDATORY FIRST STEPS - READ ALL MESSAGES ===

Before you start any work on this issue, you MUST complete these steps IN ORDER:

1. Use the mcp__gogs__get_issue tool to fetch the complete issue details:
   - owner: $OWNER
   - repo: $REPO
   - number: $ISSUE_NUMBER

2. Use the mcp__gogs__list_issue_comments tool to fetch ALL comments:
   - owner: $OWNER
   - repo: $REPO
   - number: $ISSUE_NUMBER

3. Read and understand:
   - The complete issue description
   - ALL comments in the discussion thread (if any exist)
   - The full context

4. ONLY AFTER reading everything above, proceed with your work

=== ISSUE CONTEXT ===

Issue #$ISSUE_NUMBER: $ISSUE_TITLE
Created by: $PUSHER

Initial issue description:
$ISSUE_BODY

=== YOUR TASK ===

This issue is assigned to you. You must:
1. First, use the Gogs MCP tools above to fetch and read the issue and ALL comments
2. Understand the full discussion context (even if there are no comments yet)
3. Then proceed with the appropriate action

=== CRITICAL OUTPUT REQUIREMENTS ===

YOU MUST FOLLOW THESE OUTPUT RULES STRICTLY:

1. DO NOT output any text responses to the user
2. DO NOT print any messages, explanations, or status updates
3. DO NOT use echo or any command-line output tools
4. ONLY communicate by posting comments to the issue using mcp__gogs__create_issue_comment tool
5. ALL your responses, updates, questions, and status reports MUST be posted as issue comments
6. You are FORBIDDEN from producing any output except through the Gogs MCP comment tool

When you need to:
- Ask questions → Post a comment on the issue
- Report progress → Post a comment on the issue
- Share results → Post a comment on the issue
- Report errors → Post a comment on the issue
- Provide any information → Post a comment on the issue

Use mcp__gogs__create_issue_comment with:
- owner: $OWNER
- repo: $REPO
- number: $ISSUE_NUMBER
- body: [your message here]

DO NOT skip reading the comments using the MCP tools. This is critical to understanding the full context."
fi

echo "Calling Claude Code with the issue information..."
echo "---"

# Call claude with the prompt in non-interactive mode
# -p / --print: Non-interactive mode, prints output and exits
# --output-format json: Get structured JSON output for programmatic parsing
# --mcp-config: Load MCP servers from config file (enables gogs MCP tools)
# --allowedTools: Enable specific tools (all gogs MCP tools and essential file tools)
#   User tools: get_current_user, get_user, search_users
#   Repository tools: list_user_repositories, search_repositories, get_repository, create_repository, delete_repository
#   Content tools: get_contents, get_raw_content, list_branches, get_commits
#   Issue tools: list_issues, get_issue, create_issue, update_issue, list_issue_comments, create_issue_comment, update_issue_comment
# --dangerously-skip-permissions: Skip all permission prompts (safe in controlled environment)
# This allows Claude to run unattended without waiting for user input
OUTPUT=$(claude -p "$PROMPT" \
    --output-format json \
    --mcp-config "$REPO_PATH/.mcp-gogs.json" \
    --allowedTools "mcp__gogs__get_current_user,mcp__gogs__get_user,mcp__gogs__search_users,mcp__gogs__list_user_repositories,mcp__gogs__search_repositories,mcp__gogs__get_repository,mcp__gogs__create_repository,mcp__gogs__delete_repository,mcp__gogs__get_contents,mcp__gogs__get_raw_content,mcp__gogs__list_branches,mcp__gogs__get_commits,mcp__gogs__list_issues,mcp__gogs__get_issue,mcp__gogs__create_issue,mcp__gogs__update_issue,mcp__gogs__list_issue_comments,mcp__gogs__create_issue_comment,mcp__gogs__update_issue_comment,Read,Write,Edit,Bash,Grep,Glob,TodoWrite" \
    --dangerously-skip-permissions 2>&1)
EXIT_CODE=$?

echo "---"
echo "Claude Code execution completed (exit code: $EXIT_CODE)"

# Log the output for debugging
if [ $EXIT_CODE -eq 0 ]; then
    echo "Claude response received successfully"
    # Parse JSON output to check for errors or important info
    if command -v jq &> /dev/null; then
        echo "Session details:"
        echo "$OUTPUT" | jq -r '.sessionId, .cost, .duration' 2>/dev/null || echo "$OUTPUT"
    else
        echo "Output (first 500 chars): ${OUTPUT:0:500}"
    fi
else
    echo "Error: Claude Code failed with exit code $EXIT_CODE"
    echo "Output: $OUTPUT"
fi

exit $EXIT_CODE