#!/bin/bash

set -e

function get_file_size {
    local file="$1"
    if [[ "$OSTYPE" == "darwin"* ]]; then
        eval "$(stat -s "$file")"
        local res="$?"
        echo "${st_size:?}"
        return $res
    else
        stat --printf="%s" "$file"
        return $?
    fi
}

#git_remove_from_pages <file>
function git_remove_from_pages {
    local path=$1
    local info
    local type
    local sha
    local message

    info=$(curl -s -k -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.v3.object+json" -X GET "https://api.github.com/repos/$GITHUB_REPOSITORY/contents/$path?ref=gh-pages")
    type=$(echo "$info" | jq -r '.type')

    if [ ! "$type" == "file" ]; then
        if [ ! "$type" == "null" ]; then
            echo "Wrong type '$type'"
        else
            echo "File is not on Pages"
        fi
        return 0
    fi

    sha=$(echo "$info" | jq -r '.sha')
    message="Deleting "$(basename "$path")
    local json="{\"branch\":\"gh-pages\",\"message\":\"$message\",\"sha\":\"$sha\"}"
    echo "$json" | curl -s -k -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.v3.raw+json" -X DELETE --data @- "https://api.github.com/repos/$GITHUB_REPOSITORY/contents/$path"
}

function git_upload_to_pages {
    local path=$1
    local src=$2

    if [ ! -f "$src" ]; then
        >&2 echo "Input is not a file! Aborting..."
        return 1
    fi

    local info
    local type
    local message
    local sha=""
    local content=""

    info=$(curl -s -k -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.v3.object+json" -X GET "https://api.github.com/repos/$GITHUB_REPOSITORY/contents/$path?ref=gh-pages")
    type=$(echo "$info" | jq -r '.type')
    message=$(basename "$path")

    if [ "$type" == "file" ]; then
        sha=$(echo "$info" | jq -r '.sha')
        sha=",\"sha\":\"$sha\""
        message="Updating $message"
    elif [ ! "$type" == "null" ]; then
        >&2 echo "Wrong type '$type'"
        return 1
    else
        message="Creating $message"
    fi

    content=$(base64 -i "$src")
    data="{\"branch\":\"gh-pages\",\"message\":\"$message\",\"content\":\"$content\"$sha}"

    echo "$data" | curl -s -k -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.v3.raw+json" -X PUT --data @- "https://api.github.com/repos/$GITHUB_REPOSITORY/contents/$path"
}

function git_safe_upload_to_pages {
    local path=$1
    local file="$2"
    local name
    local size
    local upload_res

    name=$(basename "$file")
    size=$(get_file_size "$file")

    if ! upload_res=$(git_upload_to_pages "$path" "$file"); then
        >&2 echo "ERROR: Failed to upload '$name' ($?)"
        return 1
    fi

    up_size=$(echo "$upload_res" | jq -r '.content.size')
    if [ "$up_size" -ne "$size" ]; then
        >&2 echo "ERROR: Uploaded size does not match! $up_size != $size"
        #git_delete_asset
        return 1
    fi
    echo "$upload_res" | jq -r '.content.download_url'
    return $?
}

git_safe_upload_to_pages "index.md" "README.md"

# At some point github stopped providing a list of edited file
# but we also stopped havong documentation in md format,
# so we can skip this portion safely and update just the index

# EVENT_JSON=`cat $GITHUB_EVENT_PATH`

# echo "GITHUB_EVENT_PATH: $GITHUB_EVENT_PATH"
# echo "EVENT_JSON: $EVENT_JSON"

# pages_added=`echo "$EVENT_JSON" | jq -r '.commits[].added[]'`
# echo "added: $pages_added"
# pages_modified=`echo "$EVENT_JSON" | jq -r '.commits[].modified[]'`
# echo "modified: $pages_modified"
# pages_removed=`echo "$EVENT_JSON" | jq -r '.commits[].removed[]'`
# echo "removed: $pages_removed"

# for page in $pages_added; do
#     if [[ $page != "README.md" && $page != "docs/"* ]]; then
#         continue
#     fi
#     echo "Adding '$page' to pages ..."
#     if [[ $page == "README.md" ]]; then
#         git_safe_upload_to_pages "index.md" "README.md"
#     else
#         git_safe_upload_to_pages "$page" "$page"
#     fi
# done

# for page in $pages_modified; do
#     if [[ $page != "README.md" && $page != "docs/"* ]]; then
#         continue
#     fi
#     echo "Modifying '$page' ..."
#     if [[ $page == "README.md" ]]; then
#         git_safe_upload_to_pages "index.md" "README.md"
#     else
#         git_safe_upload_to_pages "$page" "$page"
#     fi
# done

# for page in $pages_removed; do
#     if [[ $page != "README.md" && $page != "docs/"* ]]; then
#         continue
#     fi
#     echo "Removing '$page' from pages ..."
#     if [[ $page == "README.md" ]]; then
#         git_remove_from_pages "README.md" > /dev/null
#     else
#         git_remove_from_pages "$page" > /dev/null
#     fi
# done

echo
echo "DONE!"