#!/bin/bash
# issue-create.sh - Create issues on Gitea or GitHub
# Usage: issue-create.sh -t "Title" [-b "Body"] [-l "label1,label2"] [-m "milestone"]

set -e

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "$SCRIPT_DIR/detect-platform.sh"

# Default values
TITLE=""
BODY=""
LABELS=""
MILESTONE=""

get_remote_host() {
    local remote_url
    remote_url=$(git remote get-url origin 2>/dev/null || true)
    if [[ -z "$remote_url" ]]; then
        return 1
    fi
    if [[ "$remote_url" =~ ^https?://([^/]+)/ ]]; then
        echo "${BASH_REMATCH[1]}"
        return 0
    fi
    if [[ "$remote_url" =~ ^git@([^:]+): ]]; then
        echo "${BASH_REMATCH[1]}"
        return 0
    fi
    return 1
}

get_gitea_token() {
    local host="$1"
    if [[ -n "${GITEA_TOKEN:-}" ]]; then
        echo "$GITEA_TOKEN"
        return 0
    fi
    local creds="$HOME/.git-credentials"
    if [[ -f "$creds" ]]; then
        local token
        token=$(grep -F "$host" "$creds" 2>/dev/null | sed -n 's#https\?://[^@]*:\([^@/]*\)@.*#\1#p' | head -n 1)
        if [[ -n "$token" ]]; then
            echo "$token"
            return 0
        fi
    fi
    return 1
}

gitea_issue_create_api() {
    local host repo token url payload
    host=$(get_remote_host) || {
        echo "Error: could not determine remote host for API fallback" >&2
        return 1
    }
    repo=$(get_repo_info) || {
        echo "Error: could not determine repo owner/name for API fallback" >&2
        return 1
    }
    token=$(get_gitea_token "$host") || {
        echo "Error: Gitea token not found for API fallback (set GITEA_TOKEN or configure ~/.git-credentials)" >&2
        return 1
    }

    if [[ -n "$LABELS" || -n "$MILESTONE" ]]; then
        echo "Warning: API fallback currently applies title/body only; labels/milestone require authenticated tea setup." >&2
    fi

    payload=$(TITLE="$TITLE" BODY="$BODY" python3 - <<'PY'
import json
import os

payload = {"title": os.environ["TITLE"]}
body = os.environ.get("BODY", "")
if body:
    payload["body"] = body
print(json.dumps(payload))
PY
)

    url="https://${host}/api/v1/repos/${repo}/issues"
    curl -fsS -X POST \
      -H "Authorization: token ${token}" \
      -H "Content-Type: application/json" \
      -d "$payload" \
      "$url"
}

usage() {
    cat <<EOF
Usage: $(basename "$0") [OPTIONS]

Create an issue on the current repository (Gitea or GitHub).

Options:
    -t, --title TITLE       Issue title (required)
    -b, --body BODY         Issue body/description
    -l, --labels LABELS     Comma-separated labels (e.g., "bug,feature")
    -m, --milestone NAME    Milestone name to assign
    -h, --help              Show this help message

Examples:
    $(basename "$0") -t "Fix login bug" -l "bug,priority-high"
    $(basename "$0") -t "Add dark mode" -b "Implement theme switching" -m "0.2.0"
EOF
    exit 1
}

# Parse arguments
while [[ $# -gt 0 ]]; do
    case $1 in
        -t|--title)
            TITLE="$2"
            shift 2
            ;;
        -b|--body)
            BODY="$2"
            shift 2
            ;;
        -l|--labels)
            LABELS="$2"
            shift 2
            ;;
        -m|--milestone)
            MILESTONE="$2"
            shift 2
            ;;
        -h|--help)
            usage
            ;;
        *)
            echo "Unknown option: $1" >&2
            usage
            ;;
    esac
done

if [[ -z "$TITLE" ]]; then
    echo "Error: Title is required (-t)" >&2
    usage
fi

PLATFORM=$(detect_platform)

case "$PLATFORM" in
    github)
        CMD="gh issue create --title \"$TITLE\""
        [[ -n "$BODY" ]] && CMD="$CMD --body \"$BODY\""
        [[ -n "$LABELS" ]] && CMD="$CMD --label \"$LABELS\""
        [[ -n "$MILESTONE" ]] && CMD="$CMD --milestone \"$MILESTONE\""
        eval "$CMD"
        ;;
    gitea)
        if command -v tea >/dev/null 2>&1; then
            CMD="tea issue create --title \"$TITLE\""
            [[ -n "$BODY" ]] && CMD="$CMD --description \"$BODY\""
            [[ -n "$LABELS" ]] && CMD="$CMD --labels \"$LABELS\""
            # tea accepts milestone by name directly (verified 2026-02-05)
            [[ -n "$MILESTONE" ]] && CMD="$CMD --milestone \"$MILESTONE\""
            if eval "$CMD"; then
                exit 0
            fi
            echo "Warning: tea issue create failed, trying Gitea API fallback..." >&2
        fi
        gitea_issue_create_api
        ;;
    *)
        echo "Error: Could not detect git platform" >&2
        exit 1
        ;;
esac